CH2M HILL · Milwaukee, WI CH2M HILL 135 South 84th Street 53214 Tel 414.272.2426 Fax 414.272.4408 August 26, 2013 430009.CV.01 Mr. William Ryan

CH2M HILL

135 South 84th Street

Milwaukee, WI

53214

Tel 414.272.2426

Fax 414.272.4408

August 26, 2013 430009.CV.01 Mr. William Ryan Work Assignment Manager (SR‐6J) U.S. Environmental Protection Agency 77 West Jackson Boulevard Chicago, IL 60604‐3507 Subject: Draft Data Evaluation Report for Water Treatment Plant Equipment Sampling

Oconomowoc Electroplating Company, Inc., Site in Ashippun, Wisconsin WA No. 160‐RARA‐05M8, Contract No. EP‐S5‐06‐01

Dear Mr. Ryan:

Enclosed please find one CD containing the Draft Data Evaluation Report for Water Treatment Plant Equipment Sampling for the Oconomowoc Electroplating Company, Inc. Site. Please contact me if you have any questions or concerns at 414‐847‐0437. Sincerely, CH2M HILL

Matt Boekenhauer Site Manager Enclosure cc:

Rhonda Flynn, CO/USEPA, Region 5 (w/o enclosure) Paul Arps, PM/CH2M HILL, Milwaukee Theresa Rojas, QAM/CH2M HILL, Milwaukee Rich Block, ASM/CH2M HILL, Milwaukee Cherie Wilson, AA/CH2M HILL, Milwaukee

Dra f t Da ta Eva lua t ion Repo r t

Oconomowoc Electroplating Company, Inc.

Ashippun, Wisconsin Water Treatment Plant Equipment Sampling

WA No. 160-RARA-05M8/Contract No. EP-S5-06-01

Prepared for

August 2013

Contents

Acronyms and Abbreviations .................................................................................................................... v

1. Introduction ............................................................................................................................. 1-11.1 Site Description ...................................................................................................................... 1-1 1.2 Site Background and Conditions ............................................................................................ 1-1 1.3 Purpose .................................................................................................................................. 1-2

2. Site Activities ........................................................................................................................... 2-12.1 Waste Management .............................................................................................................. 2-3 2.2 Decontamination and Demobilization ................................................................................... 2-3

3. Data Results and Conclusions .................................................................................................... 3-13.1 Screening Criteria ................................................................................................................... 3-1

3.1.1 Wisconsin Enforcement Standard and Preventative Action Limit ............................ 3-1 3.1.2 Federal Maximum Contaminant Level ...................................................................... 3-1 3.1.3 Federal Regional Screening Levels ............................................................................ 3-1

3.2 Data Results ........................................................................................................................... 3-1 3.3 Conclusions ............................................................................................................................ 3-2

4. Reference Cited ........................................................................................................................4-1

Appendix

A Data Quality Evaluation

Tables

2-1 Summary of Sample Locations and Analyses 3-1 Summary of Analytical Data Compared to Wisconsin ES and PALs 3-2 Summary of Analytical Data Compared to Federal MCLs 3-3 Summary of Analytical Data Compared to Federal RSLs 3-4 Summary of pH and Chloride Data

Figures

1-1 Site Location 1-2 Site Plan 2-1 Liquid Process Schematic 2-2 Solids Handling and Chemical Feed Schematics

ES082313130247MKE III

Acronyms and Abbreviations CSE confined space entry DOT Department of Transportation ES Enforcement Standard GAC granular activated carbon MCL maximum contaminant levels OECI Oconomowoc Electroplating Company, Inc. PAL Preventative Action Limit RCRA Resource Conservation and Recovery Act SVOC semivolatile organic compound USEPA U.S. Environmental Protection Agency VOC volatile organic compound

ES082313130247MKE V

SECTION 1

Introduction This report presents the data evaluation results of the water treatment plant equipment sampling activities completed at the Oconomowoc Electroplating Company, Inc. (OECI) Site in Ashippun, Wisconsin. The work was performed for the U.S. Environmental Protection Agency (USEPA) in accordance with the Statement of Work for Work Assignment No. 160-RARA-05M8. This document comprises the following sections:

• Section 1 provides a general description of the site background and history and purpose. • Section 2 describes field investigation sampling activities. • Section 3 provides a discussion of the data results. • Section 4 provides the references cited in this document. • Appendix A contains the data quality evaluation report for the sample data.

1.1 Site Description The site is in southeastern Wisconsin in Dodge County, roughly 40 miles west-northwest of Milwaukee. The site is located in the northwest quarter of the southeast quarter of Section 30 Township 9 North, Range 17 East. The 10-acre site is composed the following:

• The former 4-acre OECI facility bounded by Elm, Oak, and Eva Streets, and the Town of Ashippun Municipal garage

• Six acres of undeveloped creek and a wet, low-lying area (referred to as a wetland area) located adjacent to the southwest portion of the former site (Figures 1-1 and 1-2)

The site is located at 2573 Oak Street in Ashippun, Wisconsin.

Nearby surface water bodies include Davy Creek (flowing through the wetland area), located a few hundred feet to the southwest of the site, and Rock River, located approximately 1 mile west of the site. The site slopes gently toward Davy Creek to the southwest. Landscaped linear berms bound the site at its northwestern, northeastern, and southeastern perimeters, with approximate heights above the surrounding ground surface ranging from 3 to 4 feet. The former OECI buildings have been demolished at the site. The building housing the former groundwater treatment plant is located in the northeast part of the site (depicted as “Current Site Building” on Figure 1-2). The area immediately surrounding the OECI Site is a mixture of light industrial, commercial, and residential parcels.

1.2 Site Background and Conditions Various onsite metal cleaning and electroplating processes were performed at OECI since operations began in 1957. Operation materials included chlorinated solvents, cyanide, chromium, cadmium, copper, nickel, tin, and zinc. Degreasing operations were performed at the site using unknown compounds. OECI ceased operation in 1990 because of financial hardship. Buildings at the site were demolished in May 1992.

The remedial actions carried out under the 1990 Record of Decision and two subsequent Explanations of Significant Differences comprised multiple removal activities to eliminate the source of contamination from the site. The 1990 Record of Decision also required the extraction and treatment of contaminated groundwater from operable unit 3 to restore subsurface conditions to Wisconsin groundwater quality standards.

In 1996, USEPA constructed a treatment system to treat groundwater extracted by five wells. The treatment system was operated on behalf of USEPA by the U.S. Army Corps of Engineers. Site metals contamination was adequately addressed during the previous remedial actions, which included excavation and groundwater pump and treat.

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WATER TREATMENT PLANT EQUIPMENT SAMPLING DATA EVALUATION REPORT—OCONOMOWOC ELECTROPLATING COMPANY, INC.

The extraction system pumped groundwater from a series of five wells and discharged to a 20,000-gallon equalization storage tank. The tank functioned as a sump discharge tank where the recycle stream from the treatment facility sump, granular activated carbon (GAC), filter press filtrate, and sand filter backwash water were pumped. Flow was then pumped through the alkaline cyanide oxidation process, where sodium hydroxide and sodium hypochlorite was added for pH adjustment, allowing the noncomplex cyanide to escape from the solution while providing a favorable environment to precipitate metal hydroxides from solution. Polymer was added and slow-mixed prior to settling in an inclined plate clarifier. Sludges produced were transferred to a sludge settling tank and allowed to consolidate before removal by the plate and frame filter press. Following pH adjustment with sulfuric acid, the water was filtered and then processed through a low-profile air stripper for volatile organic compound (VOC) removal. The air stripper effluent was treated through GAC units in series. The effluent was then discharged to Davy Creek.

The extraction system was shut down in July 2004 because groundwater concentrations of VOCs from the extraction wells were no longer decreasing with continued operation, or were decreasing at a very low rate. As a part of shut down operations, the U.S. Army Corps of Engineers completed the following activities:

• Pumped down the equalization tank • Pumped all metals package tanks to the sludge tank and rinsed and pumped twice • Drained piping • Rinsed and drained the tertiary filter and disposed of the sand • Drained the air stripper • Drained and rinsed the bag filters • Removed GAC, and rinsed and drained the GAC tanks • Drained the effluent holding tank • Drained all pumps • Drained the sodium hypochlorite tank • Drained the sodium hydroxide tank • Drained and rinsed the polymer system • Drained and rinsed the sodium bisulfite system • Drained and rinsed the sulfuric acid system • Emptied and disposed of sludge from filter press • Drained and rinsed the sludge holding tank • Drained and rinsed the filtrate holding tank

1.3 Purpose The purpose of the field investigation was to collect chemical data for the groundwater treatment system components and tanks to determine how much, if any, residual contamination exists within the system. The objective of the field sampling and laboratory analysis was to obtain data in support of the following evaluations:

• Compare VOC, semivolatile organic compound (SVOC), and metals concentrations with screening levels or with consensus-based quality guidelines.

• Determine pH and chloride concentrations from chemical feed systems.

• Evaluate the potential reuse of the tanks and other equipment.

• Evaluate the potential for equipment disposal or recycling.

The activities were conducted according to the USEPA-approved Quality Assurance Project Plan Addendum, dated October 2012, and approved by USEPA on April 24, 2013 (CH2M HILL 2012).

1-2 ES082313130247MKE

SECTION 2

Site Activities Rinsate water samples were collected from equipment components of the treatment system using deionized water. The method was determined by the subcontractor, approved by CH2M HILL, and included modified confined space entry (CSE) using a new low-pressure, low-flow hand sprayer with extension wand. No entry into the equipment or tanks was necessary to complete the scope of work. CSE permits were completed prior to conducting modified CSE and air monitoring and recording results on each permit. The modified CSE consisted of breaking the plane of the equipment or tank with an arm, spraying the interior from top to bottom to generate the representative sample, and collecting the sample by filling the sample bottles directly from water pooled at the bottom of the tank or with a low-flow peristaltic pump and new disposable tubing.

CH2M HILL provided sample containers and analyzed all samples. Samples from eight select locations were tested in the field for pH and chloride by CH2M HILL, and the remainder of the samples were analyzed for VOCs, SVOCs, and Resource Conservation and Recovery Act (RCRA) metals by CH2M HILL (Table 2-1). In addition to the rinsate pH and chloride samples, additional samples were collected of the small amount of liquid that was remaining in SHT-260 and SAT-750 and analyzed for pH and chloride. In the two tanks, the wall rinsate samples of the tanks were collected separately, that is, the rinsate deionized water was captured prior to hitting the bottom of the tank, and the liquid on the bottom was an additional independent sample. The as-built liquid process schematic and solids handling and chemical feed schematics are provided as Figures 2-1 and 2-2 and also show sample locations.

TABLE 2-1 Summary of Sample Locations and Analyses

Unit of Operation

Equipment ID Description Manufacturer

Size (gallons) Material Rationale Analysis

System Packages/Treatment Process

Groundwater Extraction EQT-100 Equalization

Tank Kennedy Tank 20,000 A-36 Steel

Equalization tank used to store water from extraction wells.

VOCs, SVOCs, RCRA Metals

Cyanide/Metals Package

CRT-201/ 211

Alkaline Chlorination Tanks

CSK 4,000 Steel

Treatment process: Series of tanks used for metals removal. Multiple chemical feed points.


RMT-301/ FT-311

Rapid Mix/Flocculation Tanks

CSK 2,000 Steel VOCs, SVOCs, RCRA Metals

C-400 Clarifier CSK 1,200 Steel VOCs, SVOCs, RCRA Metals

RMT-451/ FT-461

Rapid Mix/Flocculation Tanks

CSK 2,000 Steel VOCs, SVOCs, RCRA Metals

Tertiary Filtration

TF-600 Tertiary Filter Palmer of Texas 1,100 Steel Filtration

process: filter and tank.


TFT-601 Tertiary Filter Tank

Edwards Fiberglas 832 Resin VOCs, SVOCs,

RCRA Metals

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DATA EVALUATION REPORT—OCONOMOWOC ELECTROPLATING COMPANY, INC.


Unit of Operation



Air Stripper Package DAS-500 Air Stripper VOC removal VOCs, SVOCs,

RCRA Metals

Final Polishing: Bag Filter and GAC Package

GAC-650 GAC Filter Tank CSK 500 Steel GAC filter tanks used to filter groundwater.


GAC-651 GAC Filter Tank CSK 500 Steel VOCs, SVOCs, RCRA Metals

Discharge EHT-700 Effluent Holding Tanks

Edwards Fiberglas 4,450 Resin

Holding tank used to store treatment system effluent.


Solids Handling

ST-820 Sludge Holding Tank Kennedy Tank 10,000 A-36 Steel

Holding tank for sludge from equalization tank and metals package components.


PFT-840 Press Filtrate Holding Tank

Edwards Fiberglas 10,000 Resin

Holding tank used to store filtrate from the filter press before being pumped to the equalization tank.


Chemical Feed Systems

Sodium Hypochlorite System

SCT-250 Sodium Hypochlorite Tank

Edwards Fiberglass 3,700 Resin

Sodium hypochlorite storage

pH and Chloride

SCT-250-1 Dilute Sodium Hypochlorite Tank

55 Polypropylene

Diluted sodium hypochlorite storage

pH and Chloride

SCBT-255 Sodium Hypochlorite Batch Tank

55 Polypropylene

Used to mix sodium hypochlorite solution.

pH and Chloride

Sodium Hydroxide System

SHT-260 Sodium Hydroxide Tank Kennedy Tank 2,000 A-36 Steel

Sodium hydroxide storage

pH and Chloride

Polymer Feed System PDT-350 Polymer Dilution

Tank Chem Tainer 250 Polypropylene Diluted polymer storage

pH and Chloride

1-2 ES082313130247MKE

SECTION 2-SITE ACTIVITIES


Unit of Operation



Sulfuric Acid System SAT-750 Sulfuric Acid

Tank Ryan Herco 100 Polyethylene Sulfuric acid storage

pH and Chloride

Sodium Bisulfite System

SBT-540 Sodium Bisulfite Tank Ryan Herco 55 Polyethylene

Diluted sodium bisulfite storage

pH and Chloride

SBBT-545 Sodium Bisulfite Batch Tank 55 Polypropylene

Used to mix sodium bisulfite solution.

pH and Chloride

2.1 Waste Management Remaining equipment rinsate was removed to the extent practical from the equipment, containerized in one Department of Transportation (DOT)-approved 55-gallon drum provided by CH2M HILL, and placed on a secondary containment pallet. A sample of the liquid was collected and analyzed for VOCs, SVOCs, and RCRA metals by CH2M HILL. The results were reviewed by the CH2M HILL Environmental Manager, and the liquid was determined nonhazardous. Additionally, PPE, tubing, and other disposable sampling materials were generated during the sampling efforts and containerized in one DOT-approved 55-gallon drum provided by CH2M HILL. A waste profile and manifest and transportation and disposal were completed by the investigation-derived waste subcontractor, The Environmental Quality Company. The waste was transported offsite on August 12, 2013.

2.2 Decontamination and Demobilization All PPE was removed and containerized prior to leaving the site. All disposable materials were containerized appropriately by placing tubing and other sampling materials in the 55-gallon drum and disposing of general refuse as trash.

ES082313130247MKE 1-3

SECTION 3

Data Results and Conclusions The rinsate water samples that were collected for laboratory analysis were compared to five sets of screening criteria. As described in the following subsections, the criteria are not specific to rinsate water samples of equipment. There are no criteria specific to this type of sample and therefore the criteria have been used to conduct a quantitative comparison, which is informational and for reference only.

3.1 Screening Criteria 3.1.1 Wisconsin Enforcement Standard and Preventative Action Limit Wisconsin Groundwater Standards Law, enacted in May 1984, appears in Chapter 160 and in the rules in Natural Resources 140 of the Wisconsin Administrative Code. This overriding statute established the authority for groundwater protection and numerical Enforcement Standards (ESs), which apply to all Wisconsin agencies and programs. The Department of Natural Resources and the Department of Health and Family Services work together to set the standards.

ESs are determined for substances that have the potential to cause short- or long-term health impacts in groundwater, as well as for substances that cause aesthetic problems such as bad odor or taste in groundwater. In addition, in Wisconsin, Preventative Action Limits (PALs) are set for each regulated substance. PALs represent a lesser concentration of the substance than the ES and are early warning signs that groundwater quality may be in jeopardy. ESs and PALs apply to any activity or person who discharges substances into groundwater, whether the person works for a governmental agency, corporation, or private business. PALs are intended to provide time to take preventive measures to ensure that the ES is not attained or exceeded in groundwater. Enforcement standards define when a violation has occurred in groundwater.

3.1.2 Federal Maximum Contaminant Level Maximum contaminant levels (MCLs) are standards that are set by the United States Environmental Protection Agency (USEPA) for drinking water quality. An MCL is the legal threshold limit on the amount of a substance that is allowed in public water systems under the Safe Drinking Water Act. The limit is usually expressed as a concentration in milligrams or micrograms per liter of water.

3.1.3 Federal Regional Screening Levels Regional screening levels (RSLs) are developed using risk assessment guidance from the USEPA Superfund program and can be used for Superfund sites. They are risk-based concentrations derived from standardized equations combining exposure information assumptions with USEPA toxicity data. They are used for site “screening” and as initial cleanup goals, if applicable. RSLs are not de facto cleanup standards and should not be applied as such. The RSLs’ role in site screening is to help identify areas, contaminants, and conditions that require further federal attention at a particular site. RSLs are used in the Superfund program as remedial goals for a contaminant only when there is no MCL. The RSLs presented herein were developed for residential tapwater.

3.2 Data Results Onsite metal cleaning and electroplating processes were performed at the former OECI facility with materials including chlorinated solvents, cyanide, chromium, cadmium, copper, nickel, tin, and zinc.

Based on site history and previous investigations, samples were analyzed for VOCs, SVOCs, and RCRA metals. Tables 3-1 through 3-3 present a summary of analytical results compared to the previously discussed five

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DATA EVALUATION REPORT—OCONOMOWOC ELECTROPLATING COMPANY, INC.

sets of screening criteria. The pH and chloride field test data were compared to screening limits as shown in Table 3-4. There are no criteria specific to this type of sample and therefore the criteria have been used to conduct a quantitative comparison that is informational and for reference only.

The sampling results indicate that there are exceedances of Wisconsin ES and federal maximum contaminant levels (MCLs) for RCRA metals at six locations and for SVOCs at seven locations. The sample results indicate that there are exceedances of the Wisconsin PAL concentrations for one or more of the RCRA metals at each location.

There was one exceedance of Wisconsin ES and federal MCLs for VOCs at one location for bromodichloromethane, which was in the background rinsate sample. The analyte was detected in all samples (excluding the trip blank). Bromodichloromethane, chloroform, and chloromethane (degradation products of chloroform) are common chemical byproducts of water supply chlorination (performed for drinking water disinfection purposes), and are not believed to be indicative of residual contamination.

pH and chloride field-test results exceeded screening limits for the sodium hypochlorite and sodium hydroxide system components. In addition, the 100-gallon sulfuric acid tank (SAT-750) field tested with a pH of 3.51, which is below the screening limit of 6.5 for pH and therefore is an exceedance of the selected screening criteria.

3.3 Conclusions The equipment rinsate sampling was intended to provide information for future disposition of the process equipment. Based on the sampling results, residual contamination of the former groundwater treatment facility equipment is present primarily for RCRA metals and select SVOCs. The sodium hypochlorite, sodium hydroxide, and sulfuric acid system components tested for pH and chloride appear to contain residual chemicals from the groundwater treatment process.

Future use of the building and its contents has not been determined. Depending on future use, potential options for disposition of the equipment include, but are not limited to, reuse, recycling, disposal, or a combination of the options. The majority of the equipment can be disposed of offsite at a landfill as nonhazardous special waste with no additional cleaning, with waste profiling based on generator knowledge. The 100-gallon sulfuric acid polyethylene tank (SAT-750) that contained less than 1 inch of residual liquid at a characteristically hazardous pH level (pH less than 2) will require washing prior to offsite disposal.

If the equipment is reused or recycled, additional cleaning is recommended for consideration in order to remove residuals from surfaces in and on the process equipment, piping, and appurtenances. The work may be performed in conformance with the performance standard 40 Code of Federal Regulations 268.45 Treatment Standards for Hazardous Debris. Methods, such as, but not limited to, high-pressure steam and water spray, may be used to meet a “clean debris surface,” as defined in 40 Code of Federal Regulations 268.45 and described, in part, as follows:

‘‘Clean debris surface’’ means the surface, when viewed without magnification, shall be free of all visible contaminated soil and hazardous waste except that residual staining from soil and waste consisting of light shadows, slight streaks, or minor discolorations, and soil and waste in cracks, crevices, and pits may be present provided that such staining and waste and soil in cracks, crevices, and pits shall be limited to no more than 5% of each square inch of surface area.”

Visual inspections of the equipment after performing the cleaning may be conducted to determine if the performance standard has been met. Photographs may also be used to document the post-cleaning condition of the equipment. Although not required by the standard, in addition to the visual inspection, rinsate samples of the equipment may be collected to document residual concentrations for informational purposes after meeting the performance standard. All liquid waste generated during the cleaning or sampling shall be characterized and disposed of offsite in accordance with applicable regulations.

2-2 ES082313130247MKE

SECTION 5

Reference Cited CH2M HILL. 2012. Quality Assurance Project Plan, Oconomowoc Electroplating Company, Inc., Ashippun, Wisconsin. October.

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Tables

TABLE 3‐1Summary of Analytical Data Compared to Wisconsin ES and PALsOconomowoc Electroplating Company, Inc.

Wisconsin Enforcement Standarda

Wisconsin Preventive Action Limita Units

OECI‐TS‐C‐400 13CE02‐05

OECI‐TS‐CRT‐201/21113CE02‐02

OECI‐TS‐DAS‐50013CE02‐09

OECI‐TS‐EHT‐70013CE02‐12

OECI‐TS‐EQT‐10013CE02‐03

OECI‐TS‐GAC‐65013CE02‐10

Field DupOECI‐TS‐GAC‐650

13CE02‐19OECI‐TS‐GAC‐651

13CE02‐11


13CE02‐20OECI‐TS‐PFT‐840

13CE02‐14

OECI‐TS‐RMT‐301/FT‐313CE02‐04


OECI‐TS‐ST‐82013CE02‐13

OECI‐TS‐TF‐60013CE02‐07

OECI‐TS‐TFT‐60113CE02‐08

Equipment Blank13CE02‐16

Trip Blank13CE02‐17

Bkgd RinsateOECI‐RW‐BKGD1

13CE02‐01MetalsARSENIC 10 1 µg/L 4 U 5.4 J 23.5 J 128 116 11.2 J 7.4 J 4 U 4 U 20.6 J 6.5 J 4 U 6.6 J 4.1 J 4.4 J 4 U 4 UBARIUM 2000 400 µg/L 171 J 320 J 2,840 J 1,890 J 3,160 J 364 J 243 J 142 J 119 J 1,490 J 600 J 310 J 293 J 160 J 397 J 0.29 UJ 0.29 UJCADMIUM 5 0.5 µg/L 0.58 J 2.3 11.8 36.9 13.5 2.5 1.9 J 0.63 J 0.88 J 3.6 1.4 J 1.2 J 1.4 J 1 J 1.5 J 0.3 U 0.3 UCHROMIUM, TOTAL 100 10 µg/L 2.4 J‐ 27 J 125 J 466 J 433 J 562 J 345 J 185 J 209 J 92.8 J 12.2 J 16.6 J 28.5 J 27.3 J 29.7 J 0.6 UJ 0.6 UJLEAD 15 1.5 µg/L 1.4 U 7.3 J‐ 17.5 125 126 10.6 5.3 J‐ 2.7 J‐ 2.1 J‐ 24.4 3.3 J‐ 2.7 J‐ 9.1 3.3 J+ 9.7 1.4 U 1.4 UMERCURY 2 0.2 µg/L 0.04 J 0.07 J 0.05 J 0.74 0.17 0.11 J 0.08 J 0.06 J 0.08 J 0.15 0.04 J 0.07 J 0.03 U 0.04 J 0.03 U 0.03 U 0.03 USELENIUM 50 10 µg/L 2.7 J+ 2.2 U 2.2 U 2.2 U 2.2 U 2.9 J+ 2.3 J+ 2.4 J+ 2.2 U 7.9 J+ 2.2 U 2.2 U 2.5 J+ 2.2 U 2.2 U 2.2 U 2.3 J+SILVER 50 10 µg/L 0.72 J+ 0.7 U 0.7 U 5.3 J+ 1.2 J+ 0.84 J+ 1.1 J+ 1.1 J+ 1.3 J+ 0.7 U 0.7 U 0.7 U 0.78 J+ 1.2 J+ 0.7 U 1.2 J+ 1.1 J+Semivolatile Organic Compounds2,4,5‐TRICHLOROPHENOL µg/L 1.2 U 1.2 U 1.3 U 1.2 U 1.1 U 1.6 J 1.3 J 1.2 U 1.2 U 1.2 U 1.2 U 1.2 U 1.1 U 1.2 U 1.1 U 1.1 U 1.2 U2,4,6‐TRICHLOROPHENOL µg/L 1.1 U 1.1 U 1.1 U 1.1 U 1 U 1.1 U 1.1 U 1.1 U 1.1 U 1.1 U 1.1 U 1.1 U 1 U 1.1 U 1 U 1 U 1.1 U2,4‐DICHLOROPHENOL µg/L 1.1 U 1.1 U 1.1 U 1.1 U 1 U 1.1 U 1.1 U 1.1 U 1.1 U 1.1 U 1.1 U 1.1 U 1 U 1.1 U 1 U 1 U 1.1 U2,4‐DIMETHYLPHENOL µg/L 0.88 U 0.88 U 0.93 U 0.91 U 0.85 U 0.88 U 0.88 U 0.89 U 0.88 U 0.88 U 0.89 U 0.88 U 0.82 U 0.88 U 0.85 U 0.85 U 0.88 U2,4‐DINITROPHENOL µg/L 1.6 U 1.6 U 1.7 U 1.7 U 1.5 U 1.6 U 1.6 U 1.6 U 1.6 U 1.6 U 1.6 U 1.6 U 1.5 U 1.6 U 1.5 U 1.6 U 1.6 U2,4‐DINITROTOLUENE 0.05 0.005 µg/L 0.23 U 0.23 U 0.24 U 0.23 U 0.22 U 0.23 U 0.23 U 0.23 U 0.23 U 0.23 U 0.23 U 0.23 U 0.21 U 0.23 U 0.22 U 0.22 U 0.23 U2,6‐DINITROTOLUENE 0.05 0.005 µg/L 0.3 U 0.3 U 0.32 U 0.83 J 0.29 U 0.3 U 0.3 U 0.3 U 0.3 U 0.3 U 0.3 U 0.3 U 0.28 UJ 0.3 U 0.29 U 0.29 U 0.3 U2‐CHLORONAPHTHALENE µg/L 0.19 U 0.19 U 0.2 U 0.2 U 0.19 U 0.19 U 0.19 U 0.2 U 0.19 U 0.19 U 0.2 U 0.19 U 0.18 U 0.19 U 0.19 U 0.19 U 0.19 U2‐CHLOROPHENOL µg/L 0.94 U 0.94 U 0.99 U 0.97 U 0.9 U 0.94 U 0.94 U 0.95 U 0.94 U 0.94 U 0.95 U 0.94 U 0.87 U 0.94 U 0.9 U 0.91 U 0.94 U2‐METHYLNAPHTHALENE µg/L 0.5 J 0.83 J 0.19 U 0.19 U 0.18 U 0.35 J 0.38 J 0.61 J 0.32 J 0.18 U 0.52 J 1.2 1 0.18 U 0.18 U 0.18 U 0.18 U2‐METHYLPHENOL (O‐CRESOL) µg/L 0.92 U 0.92 U 0.98 U 0.96 U 0.89 U 0.92 U 0.92 U 0.93 U 0.92 U 0.92 U 0.93 U 0.92 U 0.86 U 0.92 U 0.89 U 0.9 U 0.92 U2‐NITROANILINE µg/L 0.24 U 0.24 U 0.25 U 0.24 U 0.23 U 0.24 U 0.24 U 0.24 U 0.24 U 0.24 U 0.24 U 0.24 U 0.22 U 0.24 U 0.23 U 0.23 U 0.24 U2‐NITROPHENOL µg/L 0.97 U 0.97 U 1 U 1 U 0.93 U 0.97 U 0.97 U 0.98 U 0.97 U 0.97 U 0.98 U 0.97 U 0.9 U 0.97 U 0.93 U 0.94 U 0.97 U3,3'‐DICHLOROBENZIDINE µg/L 0.71 U 0.71 U 0.75 U 0.73 U 0.68 U 0.71 U 0.71 U 0.72 U 0.71 U 0.71 U 0.72 U 0.71 U 0.66 R 0.71 U 0.68 U 0.69 U 0.71 U3‐NITROANILINE µg/L 0.28 U 0.28 U 0.3 U 0.29 U 0.27 U 0.28 U 0.28 U 0.28 U 0.28 U 0.28 U 0.28 U 0.28 U 0.26 R 0.28 U 0.27 U 0.27 U 0.28 U4,6‐DINITRO‐2‐METHYLPHENOL µg/L 1.7 U 1.7 U 1.8 U 1.8 U 1.6 U 1.7 U 1.7 U 1.7 U 1.7 U 1.7 U 1.7 U 1.7 U 1.6 U 1.7 U 1.6 U 1.7 U 1.7 U4‐BROMOPHENYL PHENYL ETHER µg/L 0.22 U 0.22 U 0.23 U 0.22 U 0.21 U 0.22 U 0.22 U 0.22 U 0.22 U 0.22 U 0.22 U 0.22 U 0.2 U 0.22 U 0.21 U 0.21 U 0.22 U4‐CHLORO‐3‐METHYLPHENOL µg/L 0.86 U 0.86 U 0.91 U 0.89 U 0.82 U 0.86 U 0.86 U 0.87 U 0.86 U 0.86 U 0.87 U 0.86 U 0.8 U 0.86 U 0.82 U 0.83 U 0.86 U4‐CHLOROANILINE µg/L 0.13 U 0.13 U 0.14 U 0.13 U 0.12 U 0.13 U 0.13 U 0.13 U 0.13 U 0.13 U 0.13 U 0.13 U 0.12 R 0.13 U 0.12 U 0.13 U 0.13 U

4‐CHLOROPHENYL PHENYL ETHER µg/L 0.19 U 0.19 U 0.2 U 0.2 U 0.19 U 0.19 U 0.19 U 0.2 U 0.19 U 0.19 U 0.2 U 0.19 U 0.18 U 0.19 U 0.19 U 0.19 U 0.19 U4‐NITROANILINE µg/L 0.16 U 0.16 U 0.17 U 0.17 U 0.15 U 0.16 U 0.16 U 0.16 U 0.16 U 0.16 U 0.16 U 0.16 U 0.15 UJ 0.16 U 0.15 U 0.16 U 0.16 U4‐NITROPHENOL µg/L 1.2 U 1.2 U 1.3 U 1.2 U 1.1 U 1.2 U 1.2 U 1.2 U 1.2 U 1.2 U 1.2 U 1.2 U 1.1 UJ 1.2 U 1.1 U 1.1 U 1.2 UACENAPHTHENE µg/L 1.5 3.3 0.2 U 0.2 U 0.19 U 0.19 U 0.19 U 0.28 J 0.19 U 0.98 J 0.78 J 2.8 0.72 J 0.19 U 0.19 U 0.19 U 0.19 UACENAPHTHYLENE µg/L 0.18 U 0.18 U 0.19 U 0.19 U 0.18 U 0.18 U 0.18 U 0.18 U 0.18 U 0.18 U 0.18 U 0.18 U 0.17 U 0.18 U 0.18 U 0.18 U 0.18 UACETOPHENONE µg/L 0.62 J 0.29 U 0.76 J 0.97 J 0.28 U 0.75 J 0.79 J 1.2 0.67 J 2.3 0.38 J 0.5 J 1.1 5.1 0.55 J 0.28 U 0.29 UANTHRACENE 3,000 600 µg/L 2.7 9 0.13 U 0.12 U 0.11 U 0.12 U 0.12 U 0.12 U 0.12 U 0.12 U 2.3 12 1.1 0.12 U 0.11 U 0.11 U 0.12 UBENZO(A)ANTHRACENE µg/L 3 2.4 0.14 U 0.13 U 0.12 U 0.13 U 0.13 U 0.13 U 0.13 U 0.13 U 2.1 5.6 0.61 J 0.13 U 0.12 U 0.13 U 0.13 UBENZO(A)PYRENE 0.2 0.02 µg/L 1.6 0.21 J 0.16 U 0.16 U 0.14 U 0.15 U 0.15 U 0.15 U 0.15 U 0.15 U 0.98 J 0.91 J 0.14 U 0.15 U 0.14 U 0.15 U 0.15 UBENZO(B)FLUORANTHENE 0.2 0.02 µg/L 3.9 1.5 0.19 U 0.19 U 0.18 U 0.18 U 0.18 U 0.18 U 0.18 U 0.18 U 2.1 3.1 0.52 J 0.18 U 0.18 U 0.18 U 0.18 UBENZO(G,H,I)PERYLENE µg/L 1.3 0.23 U 0.24 U 0.23 U 0.22 U 0.23 U 0.23 U 0.23 U 0.23 U 0.23 U 0.69 J 0.43 J 0.21 U 0.23 U 0.22 U 0.22 U 0.23 UBENZO(K)FLUORANTHENE µg/L 1 J 0.43 J 0.23 U 0.22 U 0.21 U 0.22 U 0.22 U 0.22 U 0.22 U 0.22 U 0.56 J 1.1 0.2 U 0.22 U 0.21 U 0.21 U 0.22 UBENZYL BUTYL PHTHALATE µg/L 0.89 J 0.51 U 0.8 J 0.61 J 0.48 U 1.9 J 1.9 J 2.2 J 1.3 J 1.4 J 0.51 U 0.51 U 1.1 J 1.6 J 0.48 U 0.49 U 0.51 UBIS(2‐CHLOROETHOXY) METHANE µg/L 0.2 U 0.2 U 0.22 U 0.21 U 0.2 U 0.2 U 0.2 U 0.21 U 0.2 U 0.2 U 0.21 U 0.2 U 0.19 UJ 0.2 U 0.2 U 0.2 U 0.2 UBIS(2‐CHLOROETHYL) ETHER (2‐CHLOROETHYL ETHER) µg/L 0.23 U 0.23 U 0.24 U 0.23 U 0.22 U 0.23 U 0.23 U 0.23 U 0.23 U 0.23 U 0.23 U 0.23 U 0.21 U 0.23 U 0.22 U 0.22 U 0.23 U

BIS(2‐CHLOROISOPROPYL) ETHER µg/L 0.24 U 0.24 U 0.25 U 0.24 U 0.23 U 1.1 0.24 U 0.24 U 0.24 U 0.24 U 0.24 U 0.24 U 0.22 U 0.24 U 0.23 U 0.23 U 0.24 UBIS(2‐ETHYLHEXYL) PHTHALATE 6 0.6 µg/L 7 13 3.4 U 3.3 U 1.4 J 5 6.2 3.3 U 3.2 U 3.2 U 1.3 J 10 3 U 4.4 3.1 U 0.96 J 3.2 UCARBAZOLE µg/L 19 120 0.14 U 0.55 J 0.4 J 0.13 U 0.62 J 0.49 J 0.68 J 0.13 U 20 81 2 0.13 U 0.12 U 0.13 U 0.71 JCHRYSENE 0.2 0.02 µg/L 4.6 3.5 0.18 U 0.18 U 0.16 U 0.17 U 0.17 U 0.17 U 0.17 U 0.17 U 2.5 5.9 1.1 0.17 U 0.16 U 0.17 U 0.17 UCRESOLS, TOTAL µg/L 1.5 U 2 J 1.6 U 1.6 U 1.4 U 1.5 U 1.5 U 1.5 U 1.5 U 1.5 U 1.5 U 2.2 J 1.4 U 1.5 U 1.4 U 1.5 U 1.5 UDIBENZ(A,H)ANTHRACENE µg/L 0.38 J 0.18 U 0.19 U 0.19 U 0.18 U 0.18 U 0.18 U 0.18 U 0.18 U 0.18 U 0.19 J 0.26 J 0.17 U 0.18 U 0.18 U 0.18 U 0.18 UDIBENZOFURAN µg/L 1.9 9.1 0.22 U 0.21 U 0.2 U 0.38 J 0.43 J 1.3 0.58 J 0.27 J 1.7 6.3 1.1 0.2 U 0.2 U 0.2 U 0.2 UDIETHYL PHTHALATE µg/L 2.6 J 2.4 J 3.8 3.3 U 0.46 U 3.2 U 3.2 U 3.3 U 3.2 U 0.48 U 1.1 J 1.4 J 4.3 J 3.2 U 4.2 0.56 J 0.48 UDIMETHYL PHTHALATE µg/L 15 9.3 3.4 U 3.3 U 1.6 J 3.2 U 3.2 U 3.3 U 3.2 U 23 2.1 J 24 3 UJ 40 22 12 3.2 UDI‐N‐BUTYL PHTHALATE 1,000 100 µg/L 28 18 43 3.3 U 9.4 3.2 U 3.2 U 3.3 U 3.2 U 3.2 U 21 58 3 U 3.2 U 3.1 U 35 3.2 UDI‐N‐OCTYLPHTHALATE µg/L 0.53 U 0.53 U 0.56 U 0.54 U 0.51 U 0.98 J 1 J 0.53 U 0.53 U 0.53 U 0.53 U 0.53 U 0.49 U 0.53 U 0.51 U 0.51 U 0.53 UFLUORANTHENE 400 80 µg/L 12 18 0.15 U 0.14 U 0.13 U 0.14 U 0.14 U 0.14 U 0.14 U 0.14 U 11 25 3.5 0.14 U 0.13 U 0.14 U 0.14 UFLUORENE 400 80 µg/L 2.5 14 0.22 U 0.21 U 0.2 U 0.2 U 0.2 U 0.21 U 0.2 U 0.2 U 2.1 11 0.27 J 0.2 U 0.2 U 0.2 U 0.2 UHEXACHLOROBENZENE 1 0.1 µg/L 0.29 U 0.29 U 0.31 U 0.3 U 0.28 U 0.29 U 0.29 U 0.29 U 0.29 U 0.29 U 0.29 U 0.29 U 0.27 U 0.29 U 0.28 U 0.28 U 0.29 UHEXACHLOROBUTADIENE µg/L 0.19 U 0.19 U 0.2 U 0.2 U 0.19 U 0.19 U 0.19 U 0.2 U 0.19 U 0.19 U 0.2 U 0.19 U 0.18 U 0.19 U 0.19 U 0.19 U 0.19 UHEXACHLOROCYCLOPENTADIENE µg/L 0.28 U 0.28 U 0.3 U 0.29 U 0.27 U 0.28 U 0.28 U 0.28 U 0.28 U 0.28 U 0.28 U 0.28 U 0.26 U 0.28 U 0.27 U 0.27 U 0.28 UHEXACHLOROETHANE µg/L 0.24 U 0.24 U 0.25 U 0.24 U 0.23 U 0.24 U 0.24 U 0.24 U 0.24 U 0.24 U 0.24 U 0.24 U 0.22 U 0.24 U 0.23 U 0.23 U 0.24 UINDENO(1,2,3‐C,D)PYRENE µg/L 1.2 0.22 J 0.2 U 0.2 U 0.19 U 0.19 U 0.19 U 0.2 U 0.19 U 0.19 U 0.74 J 0.59 J 0.18 U 0.19 U 0.19 U 0.19 U 0.19 UISOPHORONE µg/L 0.19 U 0.19 U 0.2 U 0.2 U 0.19 U 0.19 U 0.19 U 0.2 U 0.19 U 9.1 0.2 U 0.19 U 0.18 U 0.19 U 0.19 U 0.19 U 0.19 UNAPHTHALENE 100 10 µg/L 0.87 J 1.8 0.2 U 0.2 U 0.19 U 0.5 J 0.52 J 0.45 J 0.28 J 0.19 U 1.7 2.5 0.8 J 0.19 U 0.19 U 0.19 U 0.19 UNITROBENZENE µg/L 0.17 U 0.17 U 0.18 U 0.18 U 0.16 U 0.17 U 0.17 U 0.17 U 0.17 U 0.17 U 0.17 U 0.17 U 0.16 U 0.17 U 0.16 U 0.17 U 0.17 UN‐NITROSODIMETHYLAMINE µg/L 0.51 U 0.51 U 0.53 U 0.52 U 0.48 U 0.51 U 0.51 U 0.51 U 0.51 U 0.51 U 0.51 U 0.51 U 0.47 U 0.51 U 0.48 U 0.49 U 0.51 UN‐NITROSODI‐N‐PROPYLAMINE µg/L 0.19 U 0.19 U 0.2 U 0.2 U 0.19 U 0.19 U 0.19 U 0.2 U 0.19 U 0.19 U 0.2 U 0.19 U 0.18 U 0.19 U 0.19 U 0.19 U 0.19 UPENTACHLOROPHENOL 1 0.1 µg/L 1.2 U 1.2 U 1.3 U 1.2 U 1.1 U 1.2 U 1.2 U 1.2 U 1.2 U 1.2 U 1.2 U 1.2 U 1.1 U 1.2 U 1.1 U 1.1 U 1.2 UPHENANTHRENE µg/L 19 79 0.34 U 0.33 U 0.31 U 0.84 J 1.1 0.93 J 0.37 J 0.32 U 20 65 11 0.32 U 0.31 U 0.31 U 0.32 UPHENOL 2,000 400 µg/L 1.7 J 2.1 J 5.7 U 5.6 U 0.49 U 5.4 U 5.4 U 5.4 U 5.4 U 0.52 U 0.71 J 3.9 J 5 U 5.4 U 5.2 U 0.88 J 0.52 UPYRENE 250 50 µg/L 6.1 8.2 0.15 U 0.14 U 0.13 U 0.14 U 0.14 U 0.14 U 0.14 U 0.14 U 5.4 13 1.7 J 0.14 U 0.13 U 0.14 U 0.14 UVolatile Organic Compounds1,1,1‐TRICHLOROETHANE 200 40 µg/L 0.009 U 0.009 U 0.009 U 0.009 U 0.009 U 0.1 U 0.1 U 0.1 U 0.009 U 0.009 U 0.009 U 0.009 U 0.009 U 0.009 U 0.009 U 0.029 J 0.009 U 0.009 U1,1,2,2‐TETRACHLOROETHANE 0.2 0.02 µg/L 0.017 U 0.017 U 0.017 U 0.017 U 0.017 U 0.017 U 0.017 U 0.017 U 0.017 U 0.017 U 0.017 U 0.017 U 0.017 U 0.017 U 0.017 U 0.017 U 0.017 U 0.017 U1,1,2‐TRICHLOROETHANE 5 0.5 µg/L 0.015 U 0.015 U 0.015 U 0.015 U 0.015 U 0.015 U 0.015 U 0.015 U 0.015 U 0.015 U 0.015 U 0.015 U 0.015 U 0.015 U 0.015 U 0.015 U 0.015 U 0.015 U1,1‐DICHLOROETHANE 850 85 µg/L 0.021 U 0.021 U 0.021 U 0.021 U 0.021 U 0.021 U 0.021 U 0.021 U 0.021 U 0.021 U 0.021 U 0.021 U 0.021 U 0.021 U 0.021 U 0.021 U 0.021 U 0.021 U1,1‐DICHLOROETHENE 7 0.7 µg/L 0.04 U 0.04 U 0.04 U 0.04 U 0.04 U 0.04 U 0.04 U 0.04 U 0.04 U 0.04 U 0.04 U 0.04 U 0.04 U 0.04 U 0.04 U 0.04 U 0.04 U 0.04 U1,2,3‐TRICHLOROBENZENE µg/L 0.04 U 0.04 U 0.04 U 0.04 U 0.04 U 0.04 U 0.04 U 0.04 U 0.04 U 0.04 U 0.04 U 0.04 U 0.04 UJ 0.04 U 0.04 U 0.04 U 0.04 U 0.04 U

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TABLE 3‐1Summary of Analytical Data Compared to Wisconsin ES and PALsOconomowoc Electroplating Company, Inc.

Wisconsin Enforcement Standarda

Wisconsin Preventive Action Limita Units

OECI‐TS‐C‐400 13CE02‐05

OECI‐TS‐CRT‐201/21113CE02‐02







13CE02‐11



13CE02‐14









13CE02‐011,2,4‐TRICHLOROBENZENE 70 14 µg/L 0.04 U 0.04 U 0.04 U 0.04 U 0.04 U 0.04 U 0.04 U 0.04 U 0.04 U 0.04 U 0.04 U 0.04 U 0.04 UJ 0.04 U 0.04 U 0.04 U 0.04 U 0.04 U

1,2‐DIBROMO‐3‐CHLOROPROPANE 0.2 0.02 µg/L 0.07 U 0.07 U 0.07 U 0.07 U 0.07 U 0.07 U 0.07 U 0.07 U 0.07 U 0.07 U 0.07 U 0.07 U 0.07 U 0.07 U 0.07 U 0.07 U 0.07 U 0.07 U1,2‐DIBROMOETHANE 0.05 0.005 µg/L 0.015 U 0.015 U 0.015 U 0.015 U 0.015 U 0.015 U 0.015 U 0.015 U 0.015 U 0.015 U 0.015 U 0.015 U 0.015 U 0.015 U 0.015 U 0.015 U 0.015 U 0.015 U1,2‐DICHLOROBENZENE 600 60 µg/L 0.025 U 0.025 U 0.025 U 0.025 U 0.025 U 0.025 U 0.025 U 0.025 U 0.025 U 0.025 U 0.025 U 0.025 U 0.025 U 0.025 U 0.025 U 0.025 U 0.025 U 0.025 U1,2‐DICHLOROETHANE 5 0.5 µg/L 0.015 U 0.015 U 0.015 U 0.015 U 0.015 U 0.015 U 0.015 U 0.015 U 0.015 U 0.015 U 0.015 U 0.015 U 0.015 U 0.015 U 0.015 U 0.015 U 0.015 U 0.015 U1,2‐DICHLOROPROPANE 5 0.5 µg/L 0.012 U 0.012 U 0.012 U 0.012 U 0.012 U 0.012 U 0.012 U 0.012 U 0.012 U 0.012 U 0.012 U 0.012 U 0.012 U 0.012 U 0.012 U 0.012 U 0.012 U 0.012 U1,3‐DICHLOROBENZENE 600 120 µg/L 0.03 U 0.03 U 0.03 U 0.03 U 0.03 U 0.03 U 0.03 U 0.03 U 0.03 U 0.03 U 0.03 U 0.03 U 0.03 U 0.03 U 0.03 U 0.03 U 0.03 U 0.03 U1,4‐DICHLOROBENZENE 75 15 µg/L 0.03 U 0.03 U 0.03 U 0.03 U 0.03 U 0.03 U 0.03 U 0.03 U 0.03 U 0.03 U 0.03 U 0.03 U 0.03 U 0.03 U 0.03 U 0.03 U 0.03 U 0.03 U2‐BUTANONE 4,000 800 µg/L 0.5 U 0.5 U 0.5 U 3.5 0.5 U 37 40 38 29 0.5 U 0.5 U 0.5 U 0.5 U 0.5 U 0.5 U 0.5 U 0.5 U 0.5 U2‐HEXANONE µg/L 0.12 U 0.12 U 0.12 U 0.12 U 0.12 U 0.92 J 0.93 J 0.12 U 0.12 U 0.12 U 0.12 U 0.12 U 0.12 U 0.12 U 0.12 U 0.12 U 0.12 U 0.12 U4‐METHYL‐2‐PENTANONE 500 50 µg/L 1.9 4.8 0.18 U 0.44 J 0.18 U 15 16 17 13 0.18 U 8 9.1 0.48 J 0.48 J 0.37 J 0.18 U 0.18 U 0.18 UACETONE 9,000 1800 µg/L 5.8 B 8 B 5.3 B 26 B 280 15 B 18 B 16 B 14 B 1,500 5.6 B 7 B 39 J 15 B 7.2 B 3.2 U 4.5 B 3.59 UBENZENE 5 0.5 µg/L 1.5 3.2 0.11 0.1 U 0.034 J 0.26 0.23 0.49 0.33 0.008 U 1.1 3.3 0.3 0.31 0.3 0.094 J 0.008 U 0.26BROMOCHLOROMETHANE µg/L 0.03 U 0.03 U 0.03 U 0.03 U 0.03 U 0.03 U 0.03 U 0.03 U 0.03 U 0.03 U 0.03 U 0.03 U 0.03 U 0.03 U 0.03 U 0.03 U 0.03 U 0.03 UBROMODICHLOROMETHANE 0.6 0.06 µg/L 0.32 0.2 0.42 0.35 0.37 0.21 0.2 0.19 0.15 0.21 0.39 0.38 0.25 0.3 0.38 0.056 J 0.016 U 0.79BROMOFORM 4.4 0.44 µg/L 0.019 U 0.019 U 0.019 U 0.019 U 0.019 U 0.019 U 0.019 U 0.019 U 0.019 U 0.019 U 0.019 U 0.019 U 0.019 U 0.019 U 0.019 U 0.019 U 0.019 U 0.019 UBROMOMETHANE 10 1 µg/L 0.14 0.12 J 0.038 U 0.038 U 0.038 U 0.26 0.27 0.15 0.23 0.038 U 0.12 J 0.038 U 0.15 0.038 U 0.22 0.038 U 0.038 U 0.038 UCARBON DISULFIDE 1,000 200 µg/L 0.07 U 0.07 U 0.07 U 0.07 U 0.07 U 0.07 U 0.07 U 0.22 U 0.07 U 0.07 U 0.07 U 0.07 U 0.07 U 0.22 U 0.07 U 0.83 0.07 U 0.83 UCARBON TETRACHLORIDE 5 0.5 µg/L 0.018 U 0.018 U 0.018 U 0.018 U 0.018 U 0.018 U 0.018 U 0.018 U 0.018 U 0.018 U 0.018 U 0.018 U 0.029 J 0.018 U 0.018 U 0.018 U 0.018 U 0.061 JCHLOROBENZENE 100 20 µg/L 0.13 0.98 0.03 U 0.031 J 0.03 U 0.12 0.11 0.15 0.045 J 0.03 U 0.071 J 0.22 0.1 0.055 J 0.055 J 0.03 U 0.03 U 0.067 JCHLOROETHANE 400 80 µg/L 0.07 U 0.22 J 0.07 U 0.07 U 0.07 U 0.44 0.34 0.51 0.18 J 0.07 U 0.07 U 0.07 U 0.23 J 0.07 U 0.093 J 0.07 U 0.07 U 0.07 UCHLOROFORM 6 0.6 µg/L 1.2 0.85 1.9 1.9 1.7 1.1 U 1.1 U 1.1 U 1.1 U 1.1 U 1.5 1.5 1.1 U 1.2 1.5 1.1 0.01 U 3.9CHLOROMETHANE 30 3 µg/L 0.14 0.38 0.1 U 0.1 U 0.026 U 0.42 0.41 0.44 0.25 0.026 U 0.14 0.16 0.2 0.13 0.17 0.099 J 0.026 U 0.082 JCIS‐1,2‐DICHLOROETHYLENE 70 7 µg/L 0.022 U 0.022 U 0.022 U 0.022 U 0.022 U 0.022 U 0.022 U 0.022 U 0.022 U 0.022 U 0.022 U 0.022 U 0.022 U 0.022 U 0.022 U 0.24 0.022 U 0.022 UCIS‐1,3‐DICHLOROPROPENE 0.4 0.04 µg/L 0.012 U 0.012 U 0.012 U 0.012 U 0.012 U 0.012 U 0.012 U 0.012 U 0.012 U 0.012 U 0.012 U 0.012 U 0.012 U 0.012 U 0.012 U 0.012 U 0.012 U 0.012 UDIBROMOCHLOROMETHANE 60 6 µg/L 0.11 0.092 J 0.11 0.11 0.082 J 0.018 U 0.074 J 0.068 J 0.057 J 0.018 U 0.094 J 0.11 0.078 J 0.087 J 0.1 0.018 U 0.018 U 0.19DICHLORODIFLUOROMETHANE 1,000 200 µg/L 0.013 U 0.013 U 0.013 U 0.013 U 0.013 U 0.013 U 0.013 U 0.013 U 0.013 U 0.013 U 0.013 U 0.013 U 0.013 UJ 0.013 U 0.013 U 0.013 U 0.013 U 0.013 UETHYLBENZENE 700 140 µg/L 0.074 J 0.07 J 0.1 U 0.1 U 0.04 J 0.32 0.3 0.18 0.1 U 0.1 U 0.26 0.15 0.24 0.1 U 0.1 U 0.036 J 0.027 U 0.18ISOPROPYLBENZENE (CUMENE) µg/L 0.026 U 0.026 U 0.026 U 0.026 U 0.026 U 0.026 U 0.026 U 0.026 U 0.026 U 0.026 U 0.026 U 0.026 U 0.026 U 0.026 U 0.026 U 0.026 U 0.026 U 0.026 UM,P,‐XYLENE 2,000 400 µg/L 0.24 0.23 0.26 0.22 U 0.11 J 0.72 0.68 0.31 0.32 0.22 U 0.94 0.6 0.46 J 0.2 J 0.22 U 0.096 J 0.06 U 0.52METHYL TERT‐BUTYL ET 60 12 µg/L 0.025 U 0.025 U 0.025 U 0.025 U 0.025 U 0.025 U 0.025 U 0.025 U 0.025 U 0.025 U 0.025 U 0.025 U 0.025 U 0.025 U 0.025 U 0.025 U 0.025 U 0.025 UMETHYLENE CHLORIDE 5 0.5 µg/L 1.7 J 1.3 J 1.5 J 1.6 B 2.6 1 UJ 1 UJ 1 UJ 1 UJ 1 UJ 2.1 J 2.3 J 1 UJ 1.1 J 1.4 J 1 U 0.2 UJ 3.4 J

O‐XYLENE (1,2‐DIMETHYLBENZENE) 2,000 400 µg/L 0.14 0.18 0.11 0.1 U 0.055 J 0.34 0.33 0.17 0.13 0.1 U 0.52 0.45 0.21 0.1 U 0.1 U 0.041 J 0.026 U 0.22STYRENE 100 10 µg/L 0.024 U 0.024 U 0.024 U 0.14 0.024 U 0.024 U 0.024 U 0.024 U 0.024 U 0.024 U 0.024 U 0.024 U 0.024 UJ 0.48 0.024 U 0.024 U 0.024 U 0.024 UTETRACHLOROETHYLENE(PCE) 5 0.5 µg/L 0.01 U 0.01 U 0.01 U 0.01 U 0.01 U 0.01 U 0.01 U 0.01 U 0.01 U 0.1 U 0.01 U 0.01 U 0.01 U 0.01 U 0.01 U 0.32 0.01 U 0.01 UTOLUENE 800 160 µg/L 0.59 0.4 1 0.66 0.46 18 16 11 3.3 0.31 0.81 0.87 0.42 0.69 0.6 0.22 0.036 J 2.2TRANS‐1,2‐DICHLOROETHENE 100 20 µg/L 0.026 U 0.026 U 0.026 U 0.026 U 0.026 U 0.026 U 0.026 U 0.026 U 0.026 U 0.026 U 0.026 U 0.026 U 0.026 U 0.026 U 0.026 U 0.026 U 0.026 U 0.026 UTRANS‐1,3‐DICHLOROPROPENE 0.4 0.04 µg/L 0.014 U 0.014 U 0.014 U 0.014 U 0.014 U 0.014 U 0.014 U 0.014 U 0.014 U 0.014 U 0.014 U 0.014 U 0.014 U 0.014 U 0.014 U 0.014 U 0.014 U 0.014 UTRICHLOROETHYLENE (TCE) 5 0.5 µg/L 0.02 U 0.02 U 0.02 U 0.02 U 0.047 J 0.26 0.25 0.28 0.087 J 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.02 UVINYL CHLORIDE 0.2 0.02 µg/L 0.019 U 0.019 U 0.019 U 0.019 U 0.019 U 0.019 U 0.019 U 0.019 U 0.019 U 0.019 U 0.019 U 0.019 U 0.019 U 0.019 U 0.019 U 0.019 U 0.019 U 0.019 Ua Public Health Groundwater Quality Standards from Wisconsin Administrative Code, Department of Natural Resources Chapter 140, January 2012.PAL = Preventative Action LimitES = Enforcement Standardµg/L = micrograms per liter

Page 2 of 2

TABLE 3‐2Summary of Analytical Data Compared to Federal MCLsOconomowoc Electroplating Company, Inc.

Federal MCLa Units

OECI‐TS‐C‐400 13CE02‐05

OECI‐TS‐CRT‐201/21113CE02‐02







13CE02‐11



13CE02‐14









13CE02‐01MetalsARSENIC 10 µg/L 4 U 5.4 J 23.5 J 128 116 11.2 J 7.4 J 4 U 4 U 20.6 J 6.5 J 4 U 6.6 J 4.1 J 4.4 J 4 U 4 UBARIUM 2,000 µg/L 171 J 320 J 2,840 J 1,890 J 3,160 J 364 J 243 J 142 J 119 J 1,490 J 600 J 310 J 293 J 160 J 397 J 0.29 UJ 0.29 UJCADMIUM 5 µg/L 0.58 J 2.3 11.8 36.9 13.5 2.5 1.9 J 0.63 J 0.88 J 3.6 1.4 J 1.2 J 1.4 J 1 J 1.5 J 0.3 U 0.3 UCHROMIUM, TOTAL 100 µg/L 2.4 J‐ 27 J 125 J 466 J 433 J 562 J 345 J 185 J 209 J 92.8 J 12.2 J 16.6 J 28.5 J 27.3 J 29.7 J 0.6 UJ 0.6 UJLEAD 15 µg/L 1.4 U 7.3 J‐ 17.5 125 126 10.6 5.3 J‐ 2.7 J‐ 2.1 J‐ 24.4 3.3 J‐ 2.7 J‐ 9.1 3.3 J+ 9.7 1.4 U 1.4 UMERCURY 2 µg/L 0.04 J 0.07 J 0.05 J 0.74 0.17 0.11 J 0.08 J 0.06 J 0.08 J 0.15 0.04 J 0.07 J 0.03 U 0.04 J 0.03 U 0.03 U 0.03 USELENIUM 50 µg/L 2.7 J+ 2.2 U 2.2 U 2.2 U 2.2 U 2.9 J+ 2.3 J+ 2.4 J+ 2.2 U 7.9 J+ 2.2 U 2.2 U 2.5 J+ 2.2 U 2.2 U 2.2 U 2.3 J+SILVER µg/L 0.72 J+ 0.7 U 0.7 U 5.3 J+ 1.2 J+ 0.84 J+ 1.1 J+ 1.1 J+ 1.3 J+ 0.7 U 0.7 U 0.7 U 0.78 J+ 1.2 J+ 0.7 U 1.2 J+ 1.1 J+Semivolatile Organic Compounds2,4,5‐TRICHLOROPHENOL µg/L 1.2 U 1.2 U 1.3 U 1.2 U 1.1 U 1.6 J 1.3 J 1.2 U 1.2 U 1.2 U 1.2 U 1.2 U 1.1 U 1.2 U 1.1 U 1.1 U 1.2 U2,4,6‐TRICHLOROPHENOL µg/L 1.1 U 1.1 U 1.1 U 1.1 U 1 U 1.1 U 1.1 U 1.1 U 1.1 U 1.1 U 1.1 U 1.1 U 1 U 1.1 U 1 U 1 U 1.1 U2,4‐DICHLOROPHENOL µg/L 1.1 U 1.1 U 1.1 U 1.1 U 1 U 1.1 U 1.1 U 1.1 U 1.1 U 1.1 U 1.1 U 1.1 U 1 U 1.1 U 1 U 1 U 1.1 U2,4‐DIMETHYLPHENOL µg/L 0.88 U 0.88 U 0.93 U 0.91 U 0.85 U 0.88 U 0.88 U 0.89 U 0.88 U 0.88 U 0.89 U 0.88 U 0.82 U 0.88 U 0.85 U 0.85 U 0.88 U2,4‐DINITROPHENOL µg/L 1.6 U 1.6 U 1.7 U 1.7 U 1.5 U 1.6 U 1.6 U 1.6 U 1.6 U 1.6 U 1.6 U 1.6 U 1.5 U 1.6 U 1.5 U 1.6 U 1.6 U2,4‐DINITROTOLUENE µg/L 0.23 U 0.23 U 0.24 U 0.23 U 0.22 U 0.23 U 0.23 U 0.23 U 0.23 U 0.23 U 0.23 U 0.23 U 0.21 U 0.23 U 0.22 U 0.22 U 0.23 U2,6‐DINITROTOLUENE µg/L 0.3 U 0.3 U 0.32 U 0.83 J 0.29 U 0.3 U 0.3 U 0.3 U 0.3 U 0.3 U 0.3 U 0.3 U 0.28 UJ 0.3 U 0.29 U 0.29 U 0.3 U2‐CHLORONAPHTHALENE µg/L 0.19 U 0.19 U 0.2 U 0.2 U 0.19 U 0.19 U 0.19 U 0.2 U 0.19 U 0.19 U 0.2 U 0.19 U 0.18 U 0.19 U 0.19 U 0.19 U 0.19 U2‐CHLOROPHENOL µg/L 0.94 U 0.94 U 0.99 U 0.97 U 0.9 U 0.94 U 0.94 U 0.95 U 0.94 U 0.94 U 0.95 U 0.94 U 0.87 U 0.94 U 0.9 U 0.91 U 0.94 U2‐METHYLNAPHTHALENE µg/L 0.5 J 0.83 J 0.19 U 0.19 U 0.18 U 0.35 J 0.38 J 0.61 J 0.32 J 0.18 U 0.52 J 1.2 1 0.18 U 0.18 U 0.18 U 0.18 U2‐METHYLPHENOL (O‐CRESOL) µg/L 0.92 U 0.92 U 0.98 U 0.96 U 0.89 U 0.92 U 0.92 U 0.93 U 0.92 U 0.92 U 0.93 U 0.92 U 0.86 U 0.92 U 0.89 U 0.9 U 0.92 U2‐NITROANILINE µg/L 0.24 U 0.24 U 0.25 U 0.24 U 0.23 U 0.24 U 0.24 U 0.24 U 0.24 U 0.24 U 0.24 U 0.24 U 0.22 U 0.24 U 0.23 U 0.23 U 0.24 U2‐NITROPHENOL µg/L 0.97 U 0.97 U 1 U 1 U 0.93 U 0.97 U 0.97 U 0.98 U 0.97 U 0.97 U 0.98 U 0.97 U 0.9 U 0.97 U 0.93 U 0.94 U 0.97 U3,3'‐DICHLOROBENZIDINE µg/L 0.71 U 0.71 U 0.75 U 0.73 U 0.68 U 0.71 U 0.71 U 0.72 U 0.71 U 0.71 U 0.72 U 0.71 U 0.66 R 0.71 U 0.68 U 0.69 U 0.71 U3‐NITROANILINE µg/L 0.28 U 0.28 U 0.3 U 0.29 U 0.27 U 0.28 U 0.28 U 0.28 U 0.28 U 0.28 U 0.28 U 0.28 U 0.26 R 0.28 U 0.27 U 0.27 U 0.28 U4,6‐DINITRO‐2‐METHYLPHENOL µg/L 1.7 U 1.7 U 1.8 U 1.8 U 1.6 U 1.7 U 1.7 U 1.7 U 1.7 U 1.7 U 1.7 U 1.7 U 1.6 U 1.7 U 1.6 U 1.7 U 1.7 U4‐BROMOPHENYL PHENYL ETHER µg/L 0.22 U 0.22 U 0.23 U 0.22 U 0.21 U 0.22 U 0.22 U 0.22 U 0.22 U 0.22 U 0.22 U 0.22 U 0.2 U 0.22 U 0.21 U 0.21 U 0.22 U4‐CHLORO‐3‐METHYLPHENOL µg/L 0.86 U 0.86 U 0.91 U 0.89 U 0.82 U 0.86 U 0.86 U 0.87 U 0.86 U 0.86 U 0.87 U 0.86 U 0.8 U 0.86 U 0.82 U 0.83 U 0.86 U4‐CHLOROANILINE µg/L 0.13 U 0.13 U 0.14 U 0.13 U 0.12 U 0.13 U 0.13 U 0.13 U 0.13 U 0.13 U 0.13 U 0.13 U 0.12 R 0.13 U 0.12 U 0.13 U 0.13 U

4‐CHLOROPHENYL PHENYL ETHER µg/L 0.19 U 0.19 U 0.2 U 0.2 U 0.19 U 0.19 U 0.19 U 0.2 U 0.19 U 0.19 U 0.2 U 0.19 U 0.18 U 0.19 U 0.19 U 0.19 U 0.19 U4‐NITROANILINE µg/L 0.16 U 0.16 U 0.17 U 0.17 U 0.15 U 0.16 U 0.16 U 0.16 U 0.16 U 0.16 U 0.16 U 0.16 U 0.15 UJ 0.16 U 0.15 U 0.16 U 0.16 U4‐NITROPHENOL µg/L 1.2 U 1.2 U 1.3 U 1.2 U 1.1 U 1.2 U 1.2 U 1.2 U 1.2 U 1.2 U 1.2 U 1.2 U 1.1 UJ 1.2 U 1.1 U 1.1 U 1.2 UACENAPHTHENE µg/L 1.5 3.3 0.2 U 0.2 U 0.19 U 0.19 U 0.19 U 0.28 J 0.19 U 0.98 J 0.78 J 2.8 0.72 J 0.19 U 0.19 U 0.19 U 0.19 UACENAPHTHYLENE µg/L 0.18 U 0.18 U 0.19 U 0.19 U 0.18 U 0.18 U 0.18 U 0.18 U 0.18 U 0.18 U 0.18 U 0.18 U 0.17 U 0.18 U 0.18 U 0.18 U 0.18 UACETOPHENONE µg/L 0.62 J 0.29 U 0.76 J 0.97 J 0.28 U 0.75 J 0.79 J 1.2 0.67 J 2.3 0.38 J 0.5 J 1.1 5.1 0.55 J 0.28 U 0.29 UANTHRACENE µg/L 2.7 9 0.13 U 0.12 U 0.11 U 0.12 U 0.12 U 0.12 U 0.12 U 0.12 U 2.3 12 1.1 0.12 U 0.11 U 0.11 U 0.12 UBENZO(A)ANTHRACENE µg/L 3 2.4 0.14 U 0.13 U 0.12 U 0.13 U 0.13 U 0.13 U 0.13 U 0.13 U 2.1 5.6 0.61 J 0.13 U 0.12 U 0.13 U 0.13 UBENZO(A)PYRENE 0.2 µg/L 1.6 0.21 J 0.16 U 0.16 U 0.14 U 0.15 U 0.15 U 0.15 U 0.15 U 0.15 U 0.98 J 0.91 J 0.14 U 0.15 U 0.14 U 0.15 U 0.15 UBENZO(B)FLUORANTHENE µg/L 3.9 1.5 0.19 U 0.19 U 0.18 U 0.18 U 0.18 U 0.18 U 0.18 U 0.18 U 2.1 3.1 0.52 J 0.18 U 0.18 U 0.18 U 0.18 UBENZO(G,H,I)PERYLENE µg/L 1.3 0.23 U 0.24 U 0.23 U 0.22 U 0.23 U 0.23 U 0.23 U 0.23 U 0.23 U 0.69 J 0.43 J 0.21 U 0.23 U 0.22 U 0.22 U 0.23 UBENZO(K)FLUORANTHENE µg/L 1 J 0.43 J 0.23 U 0.22 U 0.21 U 0.22 U 0.22 U 0.22 U 0.22 U 0.22 U 0.56 J 1.1 0.2 U 0.22 U 0.21 U 0.21 U 0.22 UBENZYL BUTYL PHTHALATE µg/L 0.89 J 0.51 U 0.8 J 0.61 J 0.48 U 1.9 J 1.9 J 2.2 J 1.3 J 1.4 J 0.51 U 0.51 U 1.1 J 1.6 J 0.48 U 0.49 U 0.51 UBIS(2‐CHLOROETHOXY) METHANE µg/L 0.2 U 0.2 U 0.22 U 0.21 U 0.2 U 0.2 U 0.2 U 0.21 U 0.2 U 0.2 U 0.21 U 0.2 U 0.19 UJ 0.2 U 0.2 U 0.2 U 0.2 UBIS(2‐CHLOROETHYL) ETHER (2‐CHLOROETHYL ETHER) µg/L 0.23 U 0.23 U 0.24 U 0.23 U 0.22 U 0.23 U 0.23 U 0.23 U 0.23 U 0.23 U 0.23 U 0.23 U 0.21 U 0.23 U 0.22 U 0.22 U 0.23 U

BIS(2‐CHLOROISOPROPYL) ETHER µg/L 0.24 U 0.24 U 0.25 U 0.24 U 0.23 U 1.1 0.24 U 0.24 U 0.24 U 0.24 U 0.24 U 0.24 U 0.22 U 0.24 U 0.23 U 0.23 U 0.24 UBIS(2‐ETHYLHEXYL) PHTHALATE 6 µg/L 7 13 3.4 U 3.3 U 1.4 J 5 6.2 3.3 U 3.2 U 3.2 U 1.3 J 10 3 U 4.4 3.1 U 0.96 J 3.2 UCARBAZOLE µg/L 19 120 0.14 U 0.55 J 0.4 J 0.13 U 0.62 J 0.49 J 0.68 J 0.13 U 20 81 2 0.13 U 0.12 U 0.13 U 0.71 JCHRYSENE µg/L 4.6 3.5 0.18 U 0.18 U 0.16 U 0.17 U 0.17 U 0.17 U 0.17 U 0.17 U 2.5 5.9 1.1 0.17 U 0.16 U 0.17 U 0.17 UCRESOLS, TOTAL µg/L 1.5 U 2 J 1.6 U 1.6 U 1.4 U 1.5 U 1.5 U 1.5 U 1.5 U 1.5 U 1.5 U 2.2 J 1.4 U 1.5 U 1.4 U 1.5 U 1.5 UDIBENZ(A,H)ANTHRACENE µg/L 0.38 J 0.18 U 0.19 U 0.19 U 0.18 U 0.18 U 0.18 U 0.18 U 0.18 U 0.18 U 0.19 J 0.26 J 0.17 U 0.18 U 0.18 U 0.18 U 0.18 UDIBENZOFURAN µg/L 1.9 9.1 0.22 U 0.21 U 0.2 U 0.38 J 0.43 J 1.3 0.58 J 0.27 J 1.7 6.3 1.1 0.2 U 0.2 U 0.2 U 0.2 UDIETHYL PHTHALATE µg/L 2.6 J 2.4 J 3.8 3.3 U 0.46 U 3.2 U 3.2 U 3.3 U 3.2 U 0.48 U 1.1 J 1.4 J 4.3 J 3.2 U 4.2 0.56 J 0.48 UDIMETHYL PHTHALATE µg/L 15 9.3 3.4 U 3.3 U 1.6 J 3.2 U 3.2 U 3.3 U 3.2 U 23 2.1 J 24 3 UJ 40 22 12 3.2 UDI‐N‐BUTYL PHTHALATE µg/L 28 18 43 3.3 U 9.4 3.2 U 3.2 U 3.3 U 3.2 U 3.2 U 21 58 3 U 3.2 U 3.1 U 35 3.2 UDI‐N‐OCTYLPHTHALATE µg/L 0.53 U 0.53 U 0.56 U 0.54 U 0.51 U 0.98 J 1 J 0.53 U 0.53 U 0.53 U 0.53 U 0.53 U 0.49 U 0.53 U 0.51 U 0.51 U 0.53 UFLUORANTHENE µg/L 12 18 0.15 U 0.14 U 0.13 U 0.14 U 0.14 U 0.14 U 0.14 U 0.14 U 11 25 3.5 0.14 U 0.13 U 0.14 U 0.14 UFLUORENE µg/L 2.5 14 0.22 U 0.21 U 0.2 U 0.2 U 0.2 U 0.21 U 0.2 U 0.2 U 2.1 11 0.27 J 0.2 U 0.2 U 0.2 U 0.2 UHEXACHLOROBENZENE 1 µg/L 0.29 U 0.29 U 0.31 U 0.3 U 0.28 U 0.29 U 0.29 U 0.29 U 0.29 U 0.29 U 0.29 U 0.29 U 0.27 U 0.29 U 0.28 U 0.28 U 0.29 UHEXACHLOROBUTADIENE µg/L 0.19 U 0.19 U 0.2 U 0.2 U 0.19 U 0.19 U 0.19 U 0.2 U 0.19 U 0.19 U 0.2 U 0.19 U 0.18 U 0.19 U 0.19 U 0.19 U 0.19 UHEXACHLOROCYCLOPENTADIENE 50 µg/L 0.28 U 0.28 U 0.3 U 0.29 U 0.27 U 0.28 U 0.28 U 0.28 U 0.28 U 0.28 U 0.28 U 0.28 U 0.26 U 0.28 U 0.27 U 0.27 U 0.28 UHEXACHLOROETHANE µg/L 0.24 U 0.24 U 0.25 U 0.24 U 0.23 U 0.24 U 0.24 U 0.24 U 0.24 U 0.24 U 0.24 U 0.24 U 0.22 U 0.24 U 0.23 U 0.23 U 0.24 UINDENO(1,2,3‐C,D)PYRENE µg/L 1.2 0.22 J 0.2 U 0.2 U 0.19 U 0.19 U 0.19 U 0.2 U 0.19 U 0.19 U 0.74 J 0.59 J 0.18 U 0.19 U 0.19 U 0.19 U 0.19 UISOPHORONE µg/L 0.19 U 0.19 U 0.2 U 0.2 U 0.19 U 0.19 U 0.19 U 0.2 U 0.19 U 9.1 0.2 U 0.19 U 0.18 U 0.19 U 0.19 U 0.19 U 0.19 UNAPHTHALENE µg/L 0.87 J 1.8 0.2 U 0.2 U 0.19 U 0.5 J 0.52 J 0.45 J 0.28 J 0.19 U 1.7 2.5 0.8 J 0.19 U 0.19 U 0.19 U 0.19 UNITROBENZENE µg/L 0.17 U 0.17 U 0.18 U 0.18 U 0.16 U 0.17 U 0.17 U 0.17 U 0.17 U 0.17 U 0.17 U 0.17 U 0.16 U 0.17 U 0.16 U 0.17 U 0.17 UN‐NITROSODIMETHYLAMINE µg/L 0.51 U 0.51 U 0.53 U 0.52 U 0.48 U 0.51 U 0.51 U 0.51 U 0.51 U 0.51 U 0.51 U 0.51 U 0.47 U 0.51 U 0.48 U 0.49 U 0.51 UN‐NITROSODI‐N‐PROPYLAMINE µg/L 0.19 U 0.19 U 0.2 U 0.2 U 0.19 U 0.19 U 0.19 U 0.2 U 0.19 U 0.19 U 0.2 U 0.19 U 0.18 U 0.19 U 0.19 U 0.19 U 0.19 UPENTACHLOROPHENOL 1 µg/L 1.2 U 1.2 U 1.3 U 1.2 U 1.1 U 1.2 U 1.2 U 1.2 U 1.2 U 1.2 U 1.2 U 1.2 U 1.1 U 1.2 U 1.1 U 1.1 U 1.2 UPHENANTHRENE µg/L 19 79 0.34 U 0.33 U 0.31 U 0.84 J 1.1 0.93 J 0.37 J 0.32 U 20 65 11 0.32 U 0.31 U 0.31 U 0.32 UPHENOL µg/L 1.7 J 2.1 J 5.7 U 5.6 U 0.49 U 5.4 U 5.4 U 5.4 U 5.4 U 0.52 U 0.71 J 3.9 J 5 U 5.4 U 5.2 U 0.88 J 0.52 UPYRENE µg/L 6.1 8.2 0.15 U 0.14 U 0.13 U 0.14 U 0.14 U 0.14 U 0.14 U 0.14 U 5.4 13 1.7 J 0.14 U 0.13 U 0.14 U 0.14 UVolatile Organic Compounds1,1,1‐TRICHLOROETHANE 200 µg/L 0.009 U 0.009 U 0.009 U 0.009 U 0.009 U 0.1 U 0.1 U 0.1 U 0.009 U 0.009 U 0.009 U 0.009 U 0.009 U 0.009 U 0.009 U 0.029 J 0.009 U 0.009 U1,1,2,2‐TETRACHLOROETHANE µg/L 0.017 U 0.017 U 0.017 U 0.017 U 0.017 U 0.017 U 0.017 U 0.017 U 0.017 U 0.017 U 0.017 U 0.017 U 0.017 U 0.017 U 0.017 U 0.017 U 0.017 U 0.017 U1,1,2‐TRICHLOROETHANE 5 µg/L 0.015 U 0.015 U 0.015 U 0.015 U 0.015 U 0.015 U 0.015 U 0.015 U 0.015 U 0.015 U 0.015 U 0.015 U 0.015 U 0.015 U 0.015 U 0.015 U 0.015 U 0.015 U1,1‐DICHLOROETHANE µg/L 0.021 U 0.021 U 0.021 U 0.021 U 0.021 U 0.021 U 0.021 U 0.021 U 0.021 U 0.021 U 0.021 U 0.021 U 0.021 U 0.021 U 0.021 U 0.021 U 0.021 U 0.021 U1,1‐DICHLOROETHENE 7 µg/L 0.04 U 0.04 U 0.04 U 0.04 U 0.04 U 0.04 U 0.04 U 0.04 U 0.04 U 0.04 U 0.04 U 0.04 U 0.04 U 0.04 U 0.04 U 0.04 U 0.04 U 0.04 U1,2,3‐TRICHLOROBENZENE µg/L 0.04 U 0.04 U 0.04 U 0.04 U 0.04 U 0.04 U 0.04 U 0.04 U 0.04 U 0.04 U 0.04 U 0.04 U 0.04 UJ 0.04 U 0.04 U 0.04 U 0.04 U 0.04 U1,2,4‐TRICHLOROBENZENE 70 µg/L 0.04 U 0.04 U 0.04 U 0.04 U 0.04 U 0.04 U 0.04 U 0.04 U 0.04 U 0.04 U 0.04 U 0.04 U 0.04 UJ 0.04 U 0.04 U 0.04 U 0.04 U 0.04 U

1,2‐DIBROMO‐3‐CHLOROPROPANE 0.2 µg/L 0.07 U 0.07 U 0.07 U 0.07 U 0.07 U 0.07 U 0.07 U 0.07 U 0.07 U 0.07 U 0.07 U 0.07 U 0.07 U 0.07 U 0.07 U 0.07 U 0.07 U 0.07 U

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TABLE 3‐2Summary of Analytical Data Compared to Federal MCLsOconomowoc Electroplating Company, Inc.

Federal MCLa Units

OECI‐TS‐C‐400 13CE02‐05

OECI‐TS‐CRT‐201/21113CE02‐02







13CE02‐11



13CE02‐14









13CE02‐011,2‐DIBROMOETHANE 0.05 µg/L 0.015 U 0.015 U 0.015 U 0.015 U 0.015 U 0.015 U 0.015 U 0.015 U 0.015 U 0.015 U 0.015 U 0.015 U 0.015 U 0.015 U 0.015 U 0.015 U 0.015 U 0.015 U1,2‐DICHLOROBENZENE 600 µg/L 0.025 U 0.025 U 0.025 U 0.025 U 0.025 U 0.025 U 0.025 U 0.025 U 0.025 U 0.025 U 0.025 U 0.025 U 0.025 U 0.025 U 0.025 U 0.025 U 0.025 U 0.025 U1,2‐DICHLOROETHANE 5 µg/L 0.015 U 0.015 U 0.015 U 0.015 U 0.015 U 0.015 U 0.015 U 0.015 U 0.015 U 0.015 U 0.015 U 0.015 U 0.015 U 0.015 U 0.015 U 0.015 U 0.015 U 0.015 U1,2‐DICHLOROPROPANE 5 µg/L 0.012 U 0.012 U 0.012 U 0.012 U 0.012 U 0.012 U 0.012 U 0.012 U 0.012 U 0.012 U 0.012 U 0.012 U 0.012 U 0.012 U 0.012 U 0.012 U 0.012 U 0.012 U1,3‐DICHLOROBENZENE µg/L 0.03 U 0.03 U 0.03 U 0.03 U 0.03 U 0.03 U 0.03 U 0.03 U 0.03 U 0.03 U 0.03 U 0.03 U 0.03 U 0.03 U 0.03 U 0.03 U 0.03 U 0.03 U1,4‐DICHLOROBENZENE 75 µg/L 0.03 U 0.03 U 0.03 U 0.03 U 0.03 U 0.03 U 0.03 U 0.03 U 0.03 U 0.03 U 0.03 U 0.03 U 0.03 U 0.03 U 0.03 U 0.03 U 0.03 U 0.03 U2‐BUTANONE µg/L 0.5 U 0.5 U 0.5 U 3.5 0.5 U 37 40 38 29 0.5 U 0.5 U 0.5 U 0.5 U 0.5 U 0.5 U 0.5 U 0.5 U 0.5 U2‐HEXANONE µg/L 0.12 U 0.12 U 0.12 U 0.12 U 0.12 U 0.92 J 0.93 J 0.12 U 0.12 U 0.12 U 0.12 U 0.12 U 0.12 U 0.12 U 0.12 U 0.12 U 0.12 U 0.12 U4‐METHYL‐2‐PENTANONE µg/L 1.9 4.8 0.18 U 0.44 J 0.18 U 15 16 17 13 0.18 U 8 9.1 0.48 J 0.48 J 0.37 J 0.18 U 0.18 U 0.18 UACETONE µg/L 5.8 B 8 B 5.3 B 26 B 280 15 B 18 B 16 B 14 B 1,500 5.6 B 7 B 39 J 15 B 7.2 B 3.2 U 4.5 B 3.59 UBENZENE 5 µg/L 1.5 3.2 0.11 0.1 U 0.034 J 0.26 0.23 0.49 0.33 0.008 U 1.1 3.3 0.3 0.31 0.3 0.094 J 0.008 U 0.26BROMOCHLOROMETHANE µg/L 0.03 U 0.03 U 0.03 U 0.03 U 0.03 U 0.03 U 0.03 U 0.03 U 0.03 U 0.03 U 0.03 U 0.03 U 0.03 U 0.03 U 0.03 U 0.03 U 0.03 U 0.03 UBROMODICHLOROMETHANE 80 µg/L 0.32 0.2 0.42 0.35 0.37 0.21 0.2 0.19 0.15 0.21 0.39 0.38 0.25 0.3 0.38 0.056 J 0.016 U 0.79BROMOFORM 80 µg/L 0.019 U 0.019 U 0.019 U 0.019 U 0.019 U 0.019 U 0.019 U 0.019 U 0.019 U 0.019 U 0.019 U 0.019 U 0.019 U 0.019 U 0.019 U 0.019 U 0.019 U 0.019 UBROMOMETHANE µg/L 0.14 0.12 J 0.038 U 0.038 U 0.038 U 0.26 0.27 0.15 0.23 0.038 U 0.12 J 0.038 U 0.15 0.038 U 0.22 0.038 U 0.038 U 0.038 UCARBON DISULFIDE µg/L 0.07 U 0.07 U 0.07 U 0.07 U 0.07 U 0.07 U 0.07 U 0.22 U 0.07 U 0.07 U 0.07 U 0.07 U 0.07 U 0.22 U 0.07 U 0.83 0.07 U 0.83 UCARBON TETRACHLORIDE 5 µg/L 0.018 U 0.018 U 0.018 U 0.018 U 0.018 U 0.018 U 0.018 U 0.018 U 0.018 U 0.018 U 0.018 U 0.018 U 0.029 J 0.018 U 0.018 U 0.018 U 0.018 U 0.061 JCHLOROBENZENE 100 µg/L 0.13 0.98 0.03 U 0.031 J 0.03 U 0.12 0.11 0.15 0.045 J 0.03 U 0.071 J 0.22 0.1 0.055 J 0.055 J 0.03 U 0.03 U 0.067 JCHLOROETHANE µg/L 0.07 U 0.22 J 0.07 U 0.07 U 0.07 U 0.44 0.34 0.51 0.18 J 0.07 U 0.07 U 0.07 U 0.23 J 0.07 U 0.093 J 0.07 U 0.07 U 0.07 UCHLOROFORM 80 µg/L 1.2 0.85 1.9 1.9 1.7 1.1 U 1.1 U 1.1 U 1.1 U 1.1 U 1.5 1.5 1.1 U 1.2 1.5 1.1 0.01 U 3.9CHLOROMETHANE µg/L 0.14 0.38 0.1 U 0.1 U 0.026 U 0.42 0.41 0.44 0.25 0.026 U 0.14 0.16 0.2 0.13 0.17 0.099 J 0.026 U 0.082 JCIS‐1,2‐DICHLOROETHYLENE 70 µg/L 0.022 U 0.022 U 0.022 U 0.022 U 0.022 U 0.022 U 0.022 U 0.022 U 0.022 U 0.022 U 0.022 U 0.022 U 0.022 U 0.022 U 0.022 U 0.24 0.022 U 0.022 UCIS‐1,3‐DICHLOROPROPENE µg/L 0.012 U 0.012 U 0.012 U 0.012 U 0.012 U 0.012 U 0.012 U 0.012 U 0.012 U 0.012 U 0.012 U 0.012 U 0.012 U 0.012 U 0.012 U 0.012 U 0.012 U 0.012 UDIBROMOCHLOROMETHANE 80 µg/L 0.11 0.092 J 0.11 0.11 0.082 J 0.018 U 0.074 J 0.068 J 0.057 J 0.018 U 0.094 J 0.11 0.078 J 0.087 J 0.1 0.018 U 0.018 U 0.19DICHLORODIFLUOROMETHANE µg/L 0.013 U 0.013 U 0.013 U 0.013 U 0.013 U 0.013 U 0.013 U 0.013 U 0.013 U 0.013 U 0.013 U 0.013 U 0.013 UJ 0.013 U 0.013 U 0.013 U 0.013 U 0.013 UETHYLBENZENE 700 µg/L 0.074 J 0.07 J 0.1 U 0.1 U 0.04 J 0.32 0.3 0.18 0.1 U 0.1 U 0.26 0.15 0.24 0.1 U 0.1 U 0.036 J 0.027 U 0.18ISOPROPYLBENZENE (CUMENE) µg/L 0.026 U 0.026 U 0.026 U 0.026 U 0.026 U 0.026 U 0.026 U 0.026 U 0.026 U 0.026 U 0.026 U 0.026 U 0.026 U 0.026 U 0.026 U 0.026 U 0.026 U 0.026 UM,P,‐XYLENE 10,000 µg/L 0.24 0.23 0.26 0.22 U 0.11 J 0.72 0.68 0.31 0.32 0.22 U 0.94 0.6 0.46 J 0.2 J 0.22 U 0.096 J 0.06 U 0.52METHYL TERT‐BUTYL ET µg/L 0.025 U 0.025 U 0.025 U 0.025 U 0.025 U 0.025 U 0.025 U 0.025 U 0.025 U 0.025 U 0.025 U 0.025 U 0.025 U 0.025 U 0.025 U 0.025 U 0.025 U 0.025 UMETHYLENE CHLORIDE 5 µg/L 1.7 J 1.3 J 1.5 J 1.6 B 2.6 1 UJ 1 UJ 1 UJ 1 UJ 1 UJ 2.1 J 2.3 J 1 UJ 1.1 J 1.4 J 1 U 0.2 UJ 3.4 J

O‐XYLENE (1,2‐DIMETHYLBENZENE) 10,000 µg/L 0.14 0.18 0.11 0.1 U 0.055 J 0.34 0.33 0.17 0.13 0.1 U 0.52 0.45 0.21 0.1 U 0.1 U 0.041 J 0.026 U 0.22STYRENE 100 µg/L 0.024 U 0.024 U 0.024 U 0.14 0.024 U 0.024 U 0.024 U 0.024 U 0.024 U 0.024 U 0.024 U 0.024 U 0.024 UJ 0.48 0.024 U 0.024 U 0.024 U 0.024 UTETRACHLOROETHYLENE(PCE) 5 µg/L 0.01 U 0.01 U 0.01 U 0.01 U 0.01 U 0.01 U 0.01 U 0.01 U 0.01 U 0.1 U 0.01 U 0.01 U 0.01 U 0.01 U 0.01 U 0.32 0.01 U 0.01 UTOLUENE 1,000 µg/L 0.59 0.4 1 0.66 0.46 18 16 11 3.3 0.31 0.81 0.87 0.42 0.69 0.6 0.22 0.036 J 2.2TRANS‐1,2‐DICHLOROETHENE 100 µg/L 0.026 U 0.026 U 0.026 U 0.026 U 0.026 U 0.026 U 0.026 U 0.026 U 0.026 U 0.026 U 0.026 U 0.026 U 0.026 U 0.026 U 0.026 U 0.026 U 0.026 U 0.026 UTRANS‐1,3‐DICHLOROPROPENE µg/L 0.014 U 0.014 U 0.014 U 0.014 U 0.014 U 0.014 U 0.014 U 0.014 U 0.014 U 0.014 U 0.014 U 0.014 U 0.014 U 0.014 U 0.014 U 0.014 U 0.014 U 0.014 UTRICHLOROETHYLENE (TCE) 5 µg/L 0.02 U 0.02 U 0.02 U 0.02 U 0.047 J 0.26 0.25 0.28 0.087 J 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.02 UVINYL CHLORIDE 2 µg/L 0.019 U 0.019 U 0.019 U 0.019 U 0.019 U 0.019 U 0.019 U 0.019 U 0.019 U 0.019 U 0.019 U 0.019 U 0.019 U 0.019 U 0.019 U 0.019 U 0.019 U 0.019 Ua Maximum Contaminant Level, USEPA (EPA 816‐F‐09‐004), May 2009.MCL = Maximum Contaminant Levelµg/L = micrograms per liter

Page 2 of 2

TABLE 3‐3Summary of Analytical Data Compared to Federal RSLsOconomowoc Electroplating Company, Inc.

Federal RSL:a

Carcinogenic TR=1.0E‐6

Federal RSL:a

Noncarcinogenic HI=1 Units

OECI‐TS‐C‐400 13CE02‐05

OECI‐TS‐CRT‐201/21113CE02‐02







13CE02‐11



13CE02‐14





OECI‐TS‐TFT‐601

13CE02‐08

Equipment Blank

13CE02‐16Trip Blank13CE02‐17

Bkgd RinsateOECI‐RW‐

BKGD1 13CE02‐01

MetalsARSENIC 0.045 4.7 µg/L 4 U 5.4 J 23.5 J 128 116 11.2 J 7.4 J 4 U 4 U 20.6 J 6.5 J 4 U 6.6 J 4.1 J 4.4 J 4 U 4 UBARIUM 2900 µg/L 171 J 320 J 2,840 J 1,890 J 3,160 J 364 J 243 J 142 J 119 J 1,490 J 600 J 310 J 293 J 160 J 397 J 0.29 UJ 0.29 UJCADMIUM 6.9 µg/L 0.58 J 2.3 11.8 36.9 13.5 2.5 1.9 J 0.63 J 0.88 J 3.6 1.4 J 1.2 J 1.4 J 1 J 1.5 J 0.3 U 0.3 UCHROMIUM, TOTAL 16000 µg/L 2.4 J‐ 27 J 125 J 466 J 433 J 562 J 345 J 185 J 209 J 92.8 J 12.2 J 16.6 J 28.5 J 27.3 J 29.7 J 0.6 UJ 0.6 UJLEAD µg/L 1.4 U 7.3 J‐ 17.5 125 126 10.6 5.3 J‐ 2.7 J‐ 2.1 J‐ 24.4 3.3 J‐ 2.7 J‐ 9.1 3.3 J+ 9.7 1.4 U 1.4 UMERCURY 0.63 µg/L 0.04 J 0.07 J 0.05 J 0.74 0.17 0.11 J 0.08 J 0.06 J 0.08 J 0.15 0.04 J 0.07 J 0.03 U 0.04 J 0.03 U 0.03 U 0.03 USELENIUM 78 µg/L 2.7 J+ 2.2 U 2.2 U 2.2 U 2.2 U 2.9 J+ 2.3 J+ 2.4 J+ 2.2 U 7.9 J+ 2.2 U 2.2 U 2.5 J+ 2.2 U 2.2 U 2.2 U 2.3 J+SILVER 71 µg/L 0.72 J+ 0.7 U 0.7 U 5.3 J+ 1.2 J+ 0.84 J+ 1.1 J+ 1.1 J+ 1.3 J+ 0.7 U 0.7 U 0.7 U 0.78 J+ 1.2 J+ 0.7 U 1.2 J+ 1.1 J+Semivolatile Organic Compounds2,4,5‐TRICHLOROPHENOL 890 µg/L 1.2 U 1.2 U 1.3 U 1.2 U 1.1 U 1.6 J 1.3 J 1.2 U 1.2 U 1.2 U 1.2 U 1.2 U 1.1 U 1.2 U 1.1 U 1.1 U 1.2 U2,4,6‐TRICHLOROPHENOL 3.5 9 µg/L 1.1 U 1.1 U 1.1 U 1.1 U 1 U 1.1 U 1.1 U 1.1 U 1.1 U 1.1 U 1.1 U 1.1 U 1 U 1.1 U 1 U 1 U 1.1 U2,4‐DICHLOROPHENOL 35 µg/L 1.1 U 1.1 U 1.1 U 1.1 U 1 U 1.1 U 1.1 U 1.1 U 1.1 U 1.1 U 1.1 U 1.1 U 1 U 1.1 U 1 U 1 U 1.1 U2,4‐DIMETHYLPHENOL 270 µg/L 0.88 U 0.88 U 0.93 U 0.91 U 0.85 U 0.88 U 0.88 U 0.89 U 0.88 U 0.88 U 0.89 U 0.88 U 0.82 U 0.88 U 0.85 U 0.85 U 0.88 U2,4‐DINITROPHENOL 30 µg/L 1.6 U 1.6 U 1.7 U 1.7 U 1.5 U 1.6 U 1.6 U 1.6 U 1.6 U 1.6 U 1.6 U 1.6 U 1.5 U 1.6 U 1.5 U 1.6 U 1.6 U2,4‐DINITROTOLUENE 0.2 30 µg/L 0.23 U 0.23 U 0.24 U 0.23 U 0.22 U 0.23 U 0.23 U 0.23 U 0.23 U 0.23 U 0.23 U 0.23 U 0.21 U 0.23 U 0.22 U 0.22 U 0.23 U2,6‐DINITROTOLUENE 15 µg/L 0.3 U 0.3 U 0.32 U 0.83 J 0.29 U 0.3 U 0.3 U 0.3 U 0.3 U 0.3 U 0.3 U 0.3 U 0.28 UJ 0.3 U 0.29 U 0.29 U 0.3 U2‐CHLORONAPHTHALENE 550 µg/L 0.19 U 0.19 U 0.2 U 0.2 U 0.19 U 0.19 U 0.19 U 0.2 U 0.19 U 0.19 U 0.2 U 0.19 U 0.18 U 0.19 U 0.19 U 0.19 U 0.19 U2‐CHLOROPHENOL 71 µg/L 0.94 U 0.94 U 0.99 U 0.97 U 0.9 U 0.94 U 0.94 U 0.95 U 0.94 U 0.94 U 0.95 U 0.94 U 0.87 U 0.94 U 0.9 U 0.91 U 0.94 U2‐METHYLNAPHTHALENE 27 µg/L 0.5 J 0.83 J 0.19 U 0.19 U 0.18 U 0.35 J 0.38 J 0.61 J 0.32 J 0.18 U 0.52 J 1.2 1 0.18 U 0.18 U 0.18 U 0.18 U2‐METHYLPHENOL (O‐CRESOL) 720 µg/L 0.92 U 0.92 U 0.98 U 0.96 U 0.89 U 0.92 U 0.92 U 0.93 U 0.92 U 0.92 U 0.93 U 0.92 U 0.86 U 0.92 U 0.89 U 0.9 U 0.92 U2‐NITROANILINE 150 µg/L 0.24 U 0.24 U 0.25 U 0.24 U 0.23 U 0.24 U 0.24 U 0.24 U 0.24 U 0.24 U 0.24 U 0.24 U 0.22 U 0.24 U 0.23 U 0.23 U 0.24 U2‐NITROPHENOL µg/L 0.97 U 0.97 U 1 U 1 U 0.93 U 0.97 U 0.97 U 0.98 U 0.97 U 0.97 U 0.98 U 0.97 U 0.9 U 0.97 U 0.93 U 0.94 U 0.97 U3,3'‐DICHLOROBENZIDINE 0.11 µg/L 0.71 U 0.71 U 0.75 U 0.73 U 0.68 U 0.71 U 0.71 U 0.72 U 0.71 U 0.71 U 0.72 U 0.71 U 0.66 R 0.71 U 0.68 U 0.69 U 0.71 U3‐NITROANILINE µg/L 0.28 U 0.28 U 0.3 U 0.29 U 0.27 U 0.28 U 0.28 U 0.28 U 0.28 U 0.28 U 0.28 U 0.28 U 0.26 R 0.28 U 0.27 U 0.27 U 0.28 U4,6‐DINITRO‐2‐METHYLPHENOL 1.2 µg/L 1.7 U 1.7 U 1.8 U 1.8 U 1.6 U 1.7 U 1.7 U 1.7 U 1.7 U 1.7 U 1.7 U 1.7 U 1.6 U 1.7 U 1.6 U 1.7 U 1.7 U4‐BROMOPHENYL PHENYL ETHER µg/L 0.22 U 0.22 U 0.23 U 0.22 U 0.21 U 0.22 U 0.22 U 0.22 U 0.22 U 0.22 U 0.22 U 0.22 U 0.2 U 0.22 U 0.21 U 0.21 U 0.22 U4‐CHLORO‐3‐METHYLPHENOL 1100 µg/L 0.86 U 0.86 U 0.91 U 0.89 U 0.82 U 0.86 U 0.86 U 0.87 U 0.86 U 0.86 U 0.87 U 0.86 U 0.8 U 0.86 U 0.82 U 0.83 U 0.86 U4‐CHLOROANILINE 0.32 59 µg/L 0.13 U 0.13 U 0.14 U 0.13 U 0.12 U 0.13 U 0.13 U 0.13 U 0.13 U 0.13 U 0.13 U 0.13 U 0.12 R 0.13 U 0.12 U 0.13 U 0.13 U

4‐CHLOROPHENYL PHENYL ETHER µg/L 0.19 U 0.19 U 0.2 U 0.2 U 0.19 U 0.19 U 0.19 U 0.2 U 0.19 U 0.19 U 0.2 U 0.19 U 0.18 U 0.19 U 0.19 U 0.19 U 0.19 U4‐NITROANILINE 3.3 61 µg/L 0.16 U 0.16 U 0.17 U 0.17 U 0.15 U 0.16 U 0.16 U 0.16 U 0.16 U 0.16 U 0.16 U 0.16 U 0.15 UJ 0.16 U 0.15 U 0.16 U 0.16 U4‐NITROPHENOL µg/L 1.2 U 1.2 U 1.3 U 1.2 U 1.1 U 1.2 U 1.2 U 1.2 U 1.2 U 1.2 U 1.2 U 1.2 U 1.1 UJ 1.2 U 1.1 U 1.1 U 1.2 UACENAPHTHENE 400 µg/L 1.5 3.3 0.2 U 0.2 U 0.19 U 0.19 U 0.19 U 0.28 J 0.19 U 0.98 J 0.78 J 2.8 0.72 J 0.19 U 0.19 U 0.19 U 0.19 UACENAPHTHYLENE µg/L 0.18 U 0.18 U 0.19 U 0.19 U 0.18 U 0.18 U 0.18 U 0.18 U 0.18 U 0.18 U 0.18 U 0.18 U 0.17 U 0.18 U 0.18 U 0.18 U 0.18 UACETOPHENONE 1500 µg/L 0.62 J 0.29 U 0.76 J 0.97 J 0.28 U 0.75 J 0.79 J 1.2 0.67 J 2.3 0.38 J 0.5 J 1.1 5.1 0.55 J 0.28 U 0.29 UANTHRACENE 1300 µg/L 2.7 9 0.13 U 0.12 U 0.11 U 0.12 U 0.12 U 0.12 U 0.12 U 0.12 U 2.3 12 1.1 0.12 U 0.11 U 0.11 U 0.12 UBENZO(A)ANTHRACENE 0.029 µg/L 3 2.4 0.14 U 0.13 U 0.12 U 0.13 U 0.13 U 0.13 U 0.13 U 0.13 U 2.1 5.6 0.61 J 0.13 U 0.12 U 0.13 U 0.13 UBENZO(A)PYRENE 0.0029 µg/L 1.6 0.21 J 0.16 U 0.16 U 0.14 U 0.15 U 0.15 U 0.15 U 0.15 U 0.15 U 0.98 J 0.91 J 0.14 U 0.15 U 0.14 U 0.15 U 0.15 UBENZO(B)FLUORANTHENE 0.029 µg/L 3.9 1.5 0.19 U 0.19 U 0.18 U 0.18 U 0.18 U 0.18 U 0.18 U 0.18 U 2.1 3.1 0.52 J 0.18 U 0.18 U 0.18 U 0.18 UBENZO(G,H,I)PERYLENE µg/L 1.3 0.23 U 0.24 U 0.23 U 0.22 U 0.23 U 0.23 U 0.23 U 0.23 U 0.23 U 0.69 J 0.43 J 0.21 U 0.23 U 0.22 U 0.22 U 0.23 UBENZO(K)FLUORANTHENE 0.29 µg/L 1 J 0.43 J 0.23 U 0.22 U 0.21 U 0.22 U 0.22 U 0.22 U 0.22 U 0.22 U 0.56 J 1.1 0.2 U 0.22 U 0.21 U 0.21 U 0.22 UBENZYL BUTYL PHTHALATE 14 1200 µg/L 0.89 J 0.51 U 0.8 J 0.61 J 0.48 U 1.9 J 1.9 J 2.2 J 1.3 J 1.4 J 0.51 U 0.51 U 1.1 J 1.6 J 0.48 U 0.49 U 0.51 UBIS(2‐CHLOROETHOXY) METHANE 47 µg/L 0.2 U 0.2 U 0.22 U 0.21 U 0.2 U 0.2 U 0.2 U 0.21 U 0.2 U 0.2 U 0.21 U 0.2 U 0.19 UJ 0.2 U 0.2 U 0.2 U 0.2 UBIS(2‐CHLOROETHYL) ETHER (2‐CHLOROETHYL ETHER) 0.012 µg/L 0.23 U 0.23 U 0.24 U 0.23 U 0.22 U 0.23 U 0.23 U 0.23 U 0.23 U 0.23 U 0.23 U 0.23 U 0.21 U 0.23 U 0.22 U 0.22 U 0.23 U

BIS(2‐CHLOROISOPROPYL) ETHER 0.31 550 µg/L 0.24 U 0.24 U 0.25 U 0.24 U 0.23 U 1.1 0.24 U 0.24 U 0.24 U 0.24 U 0.24 U 0.24 U 0.22 U 0.24 U 0.23 U 0.23 U 0.24 UBIS(2‐ETHYLHEXYL) PHTHALATE 0.071 4.6 µg/L 7 13 3.4 U 3.3 U 1.4 J 5 6.2 3.3 U 3.2 U 3.2 U 1.3 J 10 3 U 4.4 3.1 U 0.96 J 3.2 UCARBAZOLE µg/L 19 120 0.14 U 0.55 J 0.4 J 0.13 U 0.62 J 0.49 J 0.68 J 0.13 U 20 81 2 0.13 U 0.12 U 0.13 U 0.71 JCHRYSENE 2.9 µg/L 4.6 3.5 0.18 U 0.18 U 0.16 U 0.17 U 0.17 U 0.17 U 0.17 U 0.17 U 2.5 5.9 1.1 0.17 U 0.16 U 0.17 U 0.17 UCRESOLS, TOTAL 1400 µg/L 1.5 U 2 J 1.6 U 1.6 U 1.4 U 1.5 U 1.5 U 1.5 U 1.5 U 1.5 U 1.5 U 2.2 J 1.4 U 1.5 U 1.4 U 1.5 U 1.5 UDIBENZ(A,H)ANTHRACENE 0.0029 µg/L 0.38 J 0.18 U 0.19 U 0.19 U 0.18 U 0.18 U 0.18 U 0.18 U 0.18 U 0.18 U 0.19 J 0.26 J 0.17 U 0.18 U 0.18 U 0.18 U 0.18 UDIBENZOFURAN 5.8 µg/L 1.9 9.1 0.22 U 0.21 U 0.2 U 0.38 J 0.43 J 1.3 0.58 J 0.27 J 1.7 6.3 1.1 0.2 U 0.2 U 0.2 U 0.2 UDIETHYL PHTHALATE 11000 µg/L 2.6 J 2.4 J 3.8 3.3 U 0.46 U 3.2 U 3.2 U 3.3 U 3.2 U 0.48 U 1.1 J 1.4 J 4.3 J 3.2 U 4.2 0.56 J 0.48 UDIMETHYL PHTHALATE µg/L 15 9.3 3.4 U 3.3 U 1.6 J 3.2 U 3.2 U 3.3 U 3.2 U 23 2.1 J 24 3 UJ 40 22 12 3.2 UDI‐N‐BUTYL PHTHALATE 670 µg/L 28 18 43 3.3 U 9.4 3.2 U 3.2 U 3.3 U 3.2 U 3.2 U 21 58 3 U 3.2 U 3.1 U 35 3.2 UDI‐N‐OCTYLPHTHALATE µg/L 0.53 U 0.53 U 0.56 U 0.54 U 0.51 U 0.98 J 1 J 0.53 U 0.53 U 0.53 U 0.53 U 0.53 U 0.49 U 0.53 U 0.51 U 0.51 U 0.53 UFLUORANTHENE 630 µg/L 12 18 0.15 U 0.14 U 0.13 U 0.14 U 0.14 U 0.14 U 0.14 U 0.14 U 11 25 3.5 0.14 U 0.13 U 0.14 U 0.14 UFLUORENE 220 µg/L 2.5 14 0.22 U 0.21 U 0.2 U 0.2 U 0.2 U 0.21 U 0.2 U 0.2 U 2.1 11 0.27 J 0.2 U 0.2 U 0.2 U 0.2 UHEXACHLOROBENZENE 0.042 13 µg/L 0.29 U 0.29 U 0.31 U 0.3 U 0.28 U 0.29 U 0.29 U 0.29 U 0.29 U 0.29 U 0.29 U 0.29 U 0.27 U 0.29 U 0.28 U 0.28 U 0.29 UHEXACHLOROBUTADIENE 0.26 4.7 µg/L 0.19 U 0.19 U 0.2 U 0.2 U 0.19 U 0.19 U 0.19 U 0.2 U 0.19 U 0.19 U 0.2 U 0.19 U 0.18 U 0.19 U 0.19 U 0.19 U 0.19 UHEXACHLOROCYCLOPENTADIENE 22 µg/L 0.28 U 0.28 U 0.3 U 0.29 U 0.27 U 0.28 U 0.28 U 0.28 U 0.28 U 0.28 U 0.28 U 0.28 U 0.26 U 0.28 U 0.27 U 0.27 U 0.28 UHEXACHLOROETHANE 0.79 5.1 µg/L 0.24 U 0.24 U 0.25 U 0.24 U 0.23 U 0.24 U 0.24 U 0.24 U 0.24 U 0.24 U 0.24 U 0.24 U 0.22 U 0.24 U 0.23 U 0.23 U 0.24 UINDENO(1,2,3‐C,D)PYRENE 0.029 µg/L 1.2 0.22 J 0.2 U 0.2 U 0.19 U 0.19 U 0.19 U 0.2 U 0.19 U 0.19 U 0.74 J 0.59 J 0.18 U 0.19 U 0.19 U 0.19 U 0.19 UISOPHORONE 67 3000 µg/L 0.19 U 0.19 U 0.2 U 0.2 U 0.19 U 0.19 U 0.19 U 0.2 U 0.19 U 9.1 0.2 U 0.19 U 0.18 U 0.19 U 0.19 U 0.19 U 0.19 UNAPHTHALENE 0.14 6.1 µg/L 0.87 J 1.8 0.2 U 0.2 U 0.19 U 0.5 J 0.52 J 0.45 J 0.28 J 0.19 U 1.7 2.5 0.8 J 0.19 U 0.19 U 0.19 U 0.19 UNITROBENZENE 0.12 11 µg/L 0.17 U 0.17 U 0.18 U 0.18 U 0.16 U 0.17 U 0.17 U 0.17 U 0.17 U 0.17 U 0.17 U 0.17 U 0.16 U 0.17 U 0.16 U 0.17 U 0.17 UN‐NITROSODIMETHYLAMINE 0.00042 0.12 µg/L 0.51 U 0.51 U 0.53 U 0.52 U 0.48 U 0.51 U 0.51 U 0.51 U 0.51 U 0.51 U 0.51 U 0.51 U 0.47 U 0.51 U 0.48 U 0.49 U 0.51 UN‐NITROSODI‐N‐PROPYLAMINE 0.0093 µg/L 0.19 U 0.19 U 0.2 U 0.2 U 0.19 U 0.19 U 0.19 U 0.2 U 0.19 U 0.19 U 0.2 U 0.19 U 0.18 U 0.19 U 0.19 U 0.19 U 0.19 UPENTACHLOROPHENOL 0.17 78 µg/L 1.2 U 1.2 U 1.3 U 1.2 U 1.1 U 1.2 U 1.2 U 1.2 U 1.2 U 1.2 U 1.2 U 1.2 U 1.1 U 1.2 U 1.1 U 1.1 U 1.2 UPHENANTHRENE µg/L 19 79 0.34 U 0.33 U 0.31 U 0.84 J 1.1 0.93 J 0.37 J 0.32 U 20 65 11 0.32 U 0.31 U 0.31 U 0.32 UPHENOL 4500 µg/L 1.7 J 2.1 J 5.7 U 5.6 U 0.49 U 5.4 U 5.4 U 5.4 U 5.4 U 0.52 U 0.71 J 3.9 J 5 U 5.4 U 5.2 U 0.88 J 0.52 UPYRENE 87 µg/L 6.1 8.2 0.15 U 0.14 U 0.13 U 0.14 U 0.14 U 0.14 U 0.14 U 0.14 U 5.4 13 1.7 J 0.14 U 0.13 U 0.14 U 0.14 UVolatile Organic Compounds1,1,1‐TRICHLOROETHANE 7500 µg/L 0.009 U 0.009 U 0.009 U 0.009 U 0.009 U 0.1 U 0.1 U 0.1 U 0.009 U 0.009 U 0.009 U 0.009 U 0.009 U 0.009 U 0.009 U 0.029 J 0.009 U 0.009 U1,1,2,2‐TETRACHLOROETHANE 0.066 280 µg/L 0.017 U 0.017 U 0.017 U 0.017 U 0.017 U 0.017 U 0.017 U 0.017 U 0.017 U 0.017 U 0.017 U 0.017 U 0.017 U 0.017 U 0.017 U 0.017 U 0.017 U 0.017 U1,1,2‐TRICHLOROETHANE 0.24 0.41 µg/L 0.015 U 0.015 U 0.015 U 0.015 U 0.015 U 0.015 U 0.015 U 0.015 U 0.015 U 0.015 U 0.015 U 0.015 U 0.015 U 0.015 U 0.015 U 0.015 U 0.015 U 0.015 U1,1‐DICHLOROETHANE 2.4 2900 µg/L 0.021 U 0.021 U 0.021 U 0.021 U 0.021 U 0.021 U 0.021 U 0.021 U 0.021 U 0.021 U 0.021 U 0.021 U 0.021 U 0.021 U 0.021 U 0.021 U 0.021 U 0.021 U1,1‐DICHLOROETHENE 260 µg/L 0.04 U 0.04 U 0.04 U 0.04 U 0.04 U 0.04 U 0.04 U 0.04 U 0.04 U 0.04 U 0.04 U 0.04 U 0.04 U 0.04 U 0.04 U 0.04 U 0.04 U 0.04 U1,2,3‐TRICHLOROBENZENE 5.2 µg/L 0.04 U 0.04 U 0.04 U 0.04 U 0.04 U 0.04 U 0.04 U 0.04 U 0.04 U 0.04 U 0.04 U 0.04 U 0.04 UJ 0.04 U 0.04 U 0.04 U 0.04 U 0.04 U1,2,4‐TRICHLOROBENZENE 0.99 3.9 µg/L 0.04 U 0.04 U 0.04 U 0.04 U 0.04 U 0.04 U 0.04 U 0.04 U 0.04 U 0.04 U 0.04 U 0.04 U 0.04 UJ 0.04 U 0.04 U 0.04 U 0.04 U 0.04 U

Page 1 of 2

TABLE 3‐3Summary of Analytical Data Compared to Federal RSLsOconomowoc Electroplating Company, Inc.

Federal RSL:a

Carcinogenic TR=1.0E‐6

Federal RSL:a

Noncarcinogenic HI=1 Units

OECI‐TS‐C‐400 13CE02‐05

OECI‐TS‐CRT‐201/21113CE02‐02







13CE02‐11



13CE02‐14





OECI‐TS‐TFT‐601

13CE02‐08

Equipment Blank

13CE02‐16Trip Blank13CE02‐17

Bkgd RinsateOECI‐RW‐

BKGD1 13CE02‐01

1,2‐DIBROMO‐3‐CHLOROPROPANE 0.00032 0.36 µg/L 0.07 U 0.07 U 0.07 U 0.07 U 0.07 U 0.07 U 0.07 U 0.07 U 0.07 U 0.07 U 0.07 U 0.07 U 0.07 U 0.07 U 0.07 U 0.07 U 0.07 U 0.07 U1,2‐DIBROMOETHANE 0.0065 16 µg/L 0.015 U 0.015 U 0.015 U 0.015 U 0.015 U 0.015 U 0.015 U 0.015 U 0.015 U 0.015 U 0.015 U 0.015 U 0.015 U 0.015 U 0.015 U 0.015 U 0.015 U 0.015 U1,2‐DICHLOROBENZENE 280 µg/L 0.025 U 0.025 U 0.025 U 0.025 U 0.025 U 0.025 U 0.025 U 0.025 U 0.025 U 0.025 U 0.025 U 0.025 U 0.025 U 0.025 U 0.025 U 0.025 U 0.025 U 0.025 U1,2‐DICHLOROETHANE 0.15 13 µg/L 0.015 U 0.015 U 0.015 U 0.015 U 0.015 U 0.015 U 0.015 U 0.015 U 0.015 U 0.015 U 0.015 U 0.015 U 0.015 U 0.015 U 0.015 U 0.015 U 0.015 U 0.015 U1,2‐DICHLOROPROPANE 0.38 8.3 µg/L 0.012 U 0.012 U 0.012 U 0.012 U 0.012 U 0.012 U 0.012 U 0.012 U 0.012 U 0.012 U 0.012 U 0.012 U 0.012 U 0.012 U 0.012 U 0.012 U 0.012 U 0.012 U1,3‐DICHLOROBENZENE µg/L 0.03 U 0.03 U 0.03 U 0.03 U 0.03 U 0.03 U 0.03 U 0.03 U 0.03 U 0.03 U 0.03 U 0.03 U 0.03 U 0.03 U 0.03 U 0.03 U 0.03 U 0.03 U1,4‐DICHLOROBENZENE 0.42 470 µg/L 0.03 U 0.03 U 0.03 U 0.03 U 0.03 U 0.03 U 0.03 U 0.03 U 0.03 U 0.03 U 0.03 U 0.03 U 0.03 U 0.03 U 0.03 U 0.03 U 0.03 U 0.03 U2‐BUTANONE 4900 µg/L 0.5 U 0.5 U 0.5 U 3.5 0.5 U 37 40 38 29 0.5 U 0.5 U 0.5 U 0.5 U 0.5 U 0.5 U 0.5 U 0.5 U 0.5 U2‐HEXANONE 34 µg/L 0.12 U 0.12 U 0.12 U 0.12 U 0.12 U 0.92 J 0.93 J 0.12 U 0.12 U 0.12 U 0.12 U 0.12 U 0.12 U 0.12 U 0.12 U 0.12 U 0.12 U 0.12 U4‐METHYL‐2‐PENTANONE 1000 µg/L 1.9 4.8 0.18 U 0.44 J 0.18 U 15 16 17 13 0.18 U 8 9.1 0.48 J 0.48 J 0.37 J 0.18 U 0.18 U 0.18 UACETONE 12000 µg/L 5.8 B 8 B 5.3 B 26 B 280 15 B 18 B 16 B 14 B 1,500 5.6 B 7 B 39 J 15 B 7.2 B 3.2 U 4.5 B 3.59 UBENZENE 0.39 29 µg/L 1.5 3.2 0.11 0.1 U 0.034 J 0.26 0.23 0.49 0.33 0.008 U 1.1 3.3 0.3 0.31 0.3 0.094 J 0.008 U 0.26BROMOCHLOROMETHANE 83 µg/L 0.03 U 0.03 U 0.03 U 0.03 U 0.03 U 0.03 U 0.03 U 0.03 U 0.03 U 0.03 U 0.03 U 0.03 U 0.03 U 0.03 U 0.03 U 0.03 U 0.03 U 0.03 UBROMODICHLOROMETHANE 0.12 290 µg/L 0.32 0.2 0.42 0.35 0.37 0.21 0.2 0.19 0.15 0.21 0.39 0.38 0.25 0.3 0.38 0.056 J 0.016 U 0.79BROMOFORM 7.9 290 µg/L 0.019 U 0.019 U 0.019 U 0.019 U 0.019 U 0.019 U 0.019 U 0.019 U 0.019 U 0.019 U 0.019 U 0.019 U 0.019 U 0.019 U 0.019 U 0.019 U 0.019 U 0.019 UBROMOMETHANE 7 µg/L 0.14 0.12 J 0.038 U 0.038 U 0.038 U 0.26 0.27 0.15 0.23 0.038 U 0.12 J 0.038 U 0.15 0.038 U 0.22 0.038 U 0.038 U 0.038 UCARBON DISULFIDE 720 µg/L 0.07 U 0.07 U 0.07 U 0.07 U 0.07 U 0.07 U 0.07 U 0.22 U 0.07 U 0.07 U 0.07 U 0.07 U 0.07 U 0.22 U 0.07 U 0.83 0.07 U 0.83 UCARBON TETRACHLORIDE 0.39 40 µg/L 0.018 U 0.018 U 0.018 U 0.018 U 0.018 U 0.018 U 0.018 U 0.018 U 0.018 U 0.018 U 0.018 U 0.018 U 0.029 J 0.018 U 0.018 U 0.018 U 0.018 U 0.061 JCHLOROBENZENE 72 µg/L 0.13 0.98 0.03 U 0.031 J 0.03 U 0.12 0.11 0.15 0.045 J 0.03 U 0.071 J 0.22 0.1 0.055 J 0.055 J 0.03 U 0.03 U 0.067 JCHLOROETHANE 21000 µg/L 0.07 U 0.22 J 0.07 U 0.07 U 0.07 U 0.44 0.34 0.51 0.18 J 0.07 U 0.07 U 0.07 U 0.23 J 0.07 U 0.093 J 0.07 U 0.07 U 0.07 UCHLOROFORM 0.19 84 µg/L 1.2 0.85 1.9 1.9 1.7 1.1 U 1.1 U 1.1 U 1.1 U 1.1 U 1.5 1.5 1.1 U 1.2 1.5 1.1 0.01 U 3.9CHLOROMETHANE 190 µg/L 0.14 0.38 0.1 U 0.1 U 0.026 U 0.42 0.41 0.44 0.25 0.026 U 0.14 0.16 0.2 0.13 0.17 0.099 J 0.026 U 0.082 JCIS‐1,2‐DICHLOROETHYLENE 28 µg/L 0.022 U 0.022 U 0.022 U 0.022 U 0.022 U 0.022 U 0.022 U 0.022 U 0.022 U 0.022 U 0.022 U 0.022 U 0.022 U 0.022 U 0.022 U 0.24 0.022 U 0.022 UCIS‐1,3‐DICHLOROPROPENE 0.41 38 µg/L 0.012 U 0.012 U 0.012 U 0.012 U 0.012 U 0.012 U 0.012 U 0.012 U 0.012 U 0.012 U 0.012 U 0.012 U 0.012 U 0.012 U 0.012 U 0.012 U 0.012 U 0.012 UDIBROMOCHLOROMETHANE 0.15 290 µg/L 0.11 0.092 J 0.11 0.11 0.082 J 0.018 U 0.074 J 0.068 J 0.057 J 0.018 U 0.094 J 0.11 0.078 J 0.087 J 0.1 0.018 U 0.018 U 0.19DICHLORODIFLUOROMETHANE 190 µg/L 0.013 U 0.013 U 0.013 U 0.013 U 0.013 U 0.013 U 0.013 U 0.013 U 0.013 U 0.013 U 0.013 U 0.013 U 0.013 UJ 0.013 U 0.013 U 0.013 U 0.013 U 0.013 UETHYLBENZENE 1.3 670 µg/L 0.074 J 0.07 J 0.1 U 0.1 U 0.04 J 0.32 0.3 0.18 0.1 U 0.1 U 0.26 0.15 0.24 0.1 U 0.1 U 0.036 J 0.027 U 0.18ISOPROPYLBENZENE (CUMENE) 390 µg/L 0.026 U 0.026 U 0.026 U 0.026 U 0.026 U 0.026 U 0.026 U 0.026 U 0.026 U 0.026 U 0.026 U 0.026 U 0.026 U 0.026 U 0.026 U 0.026 U 0.026 U 0.026 UM,P,‐XYLENE 190 µg/L 0.24 0.23 0.26 0.22 U 0.11 J 0.72 0.68 0.31 0.32 0.22 U 0.94 0.6 0.46 J 0.2 J 0.22 U 0.096 J 0.06 U 0.52METHYL TERT‐BUTYL ET 12 6300 µg/L 0.025 U 0.025 U 0.025 U 0.025 U 0.025 U 0.025 U 0.025 U 0.025 U 0.025 U 0.025 U 0.025 U 0.025 U 0.025 U 0.025 U 0.025 U 0.025 U 0.025 U 0.025 UMETHYLENE CHLORIDE 9.9 84 µg/L 1.7 J 1.3 J 1.5 J 1.6 B 2.6 1 UJ 1 UJ 1 UJ 1 UJ 1 UJ 2.1 J 2.3 J 1 UJ 1.1 J 1.4 J 1 U 0.2 UJ 3.4 J

O‐XYLENE (1,2‐DIMETHYLBENZENE) 190 µg/L 0.14 0.18 0.11 0.1 U 0.055 J 0.34 0.33 0.17 0.13 0.1 U 0.52 0.45 0.21 0.1 U 0.1 U 0.041 J 0.026 U 0.22STYRENE 1100 µg/L 0.024 U 0.024 U 0.024 U 0.14 0.024 U 0.024 U 0.024 U 0.024 U 0.024 U 0.024 U 0.024 U 0.024 U 0.024 UJ 0.48 0.024 U 0.024 U 0.024 U 0.024 UTETRACHLOROETHYLENE(PCE) 9.7 35 µg/L 0.01 U 0.01 U 0.01 U 0.01 U 0.01 U 0.01 U 0.01 U 0.01 U 0.01 U 0.1 U 0.01 U 0.01 U 0.01 U 0.01 U 0.01 U 0.32 0.01 U 0.01 UTOLUENE 860 µg/L 0.59 0.4 1 0.66 0.46 18 16 11 3.3 0.31 0.81 0.87 0.42 0.69 0.6 0.22 0.036 J 2.2TRANS‐1,2‐DICHLOROETHENE 86 µg/L 0.026 U 0.026 U 0.026 U 0.026 U 0.026 U 0.026 U 0.026 U 0.026 U 0.026 U 0.026 U 0.026 U 0.026 U 0.026 U 0.026 U 0.026 U 0.026 U 0.026 U 0.026 UTRANS‐1,3‐DICHLOROPROPENE 0.41 38 µg/L 0.014 U 0.014 U 0.014 U 0.014 U 0.014 U 0.014 U 0.014 U 0.014 U 0.014 U 0.014 U 0.014 U 0.014 U 0.014 U 0.014 U 0.014 U 0.014 U 0.014 U 0.014 UTRICHLOROETHYLENE (TCE) 0.44 2.6 µg/L 0.02 U 0.02 U 0.02 U 0.02 U 0.047 J 0.26 0.25 0.28 0.087 J 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.02 UVINYL CHLORIDE 0.015 36 µg/L 0.019 U 0.019 U 0.019 U 0.019 U 0.019 U 0.019 U 0.019 U 0.019 U 0.019 U 0.019 U 0.019 U 0.019 U 0.019 U 0.019 U 0.019 U 0.019 U 0.019 U 0.019 Ua USEPA Regional Screening Level Tapwater Supporting Table, April 2012.RSL = Regional Screening LevelTR = Target Risk; HI = Hazard Index; µg/L = micrograms per liter

Page 2 of 2

TABLE 3‐4Summary of pH and Chloride DataOconomowoc Electroplating Company, Inc.

OECI‐RW‐BKGD2

OECI‐TS‐PDT‐350

OECI‐TS‐SAT‐750

OECI‐TS‐SAT‐750‐liquid

OECI‐TS‐SBBT‐545

Field DupOECI‐TS‐SBBT‐545

OECI‐TS‐SBT‐540

OECI‐TS‐SCBT‐255

OECI‐TS‐SCT‐250

OECI‐TS‐SCT‐250‐1

OECI‐TS‐SHT‐260

OECI‐TS‐SHT‐260‐liquid

5/21/2013 5/22/2013 5/22/2013 5/22/2013 5/22/2013 5/22/2013 5/22/2013 5/22/2013 5/21/2013 5/22/2013 5/22/2013 5/22/2013Units 11:50 9:25 13:00 13:00 12:25 12:30 12:35 12:40 11:55 12:55 9:10 9:10

pH 6.5 to 8.5a pH Unit 7.22 8.5 3.51 0.03 7.32 7.3 8.29 8.25 11.01 9.45 11.01 11.98

Chloride125b

250cmg/L < 30 62 < 30 E 35 35 < 30 324 > 620 > 620 150 E

a Secondary MCL, USEPA National Secondary Drinking Water Regulations. Exceedances are highlighted.b Preventive Action Limit, Public Welfare Groundwater Quality Standards from Wisconsin Administrative Code, Department of Natural Resources Chapter 140, January 2012. Exceedances are in bold font.c Enforcement Standard, Public Welfare Groundwater Quality Standards from Wisconsin Administrative Code, Department of Natural Resources Chapter 140, January 2012. Exceedances are highlighted.mg/L = milligrams per liter; E = Error, sample would not absorb to test strip.

Screening Limits

Page 1 of 1

Figures

SITE LOCATION

ASHI PPU NWWT P

0 1,000 2,000

Feet

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FIGURE 1-1Site LocationOECI SiteAshippun, WI

OECI SITELOCATION

Milwaukee

Minneapolis/St. Paul

W i s c o n s i n

I o w a

M i c h i g a n

I l l i n o i s

M i n n e s o t a

N 445000

N 446000N 446000

N 445000

COUNTY "O" (OAK STREET)

ST. HW

Y. 67

ELM STREET

WOOD S

TREE

T

MAI

N STR

EET

.0

844.9

847.2

848.4

850

850

850 850

852.7

853.3

860.3

851.7

852.5

848.4

845.7

861.3

857.6

854.5

852.1

853.6

856.1851.4

850.7

855.5

850.3

851.6

849.1

850.3

852.1

853.3

851.3853.0

853.4

846.5

847.0

851.5

851.6

851.6

848.3

849.3

846.8

847.6849.8

844.8

849.4

849.4

848.2

847.8

847.7

847.3

847.5

847.2

847.4

847.0

849.0

849.3

847.6

848.5

846.3

846.4856.2

856.8

857.2

846.2

846.5

846.8

845.8

849.0

850

850

870

860

850

850

850

850

LINCOLN ROAD

PACIFICRR

UNION

859 7

852.9

854.6

W.E.

W.E.

849.8

W.E.

PILE

O.S.

ATHLETIC

FIELD

TOW

N OF

ASHI

PPUN

HW

Y.

DEPT

.

HWY.

DE

PT.

862.4

857.7

864.4

859.1

861.1

855.3

ASH S

TREE

T

EVA

STREE

T

ELM STREET

P-01

P-02P-03

MW-5

EW-05

EW-01

OW-06

EW-02

EW-03

PW-02

PW-01

PW-10

PW-08

PW-06PW-07

PW-05

PW-03PW-04

PW-09

PW-11

MW-1S

MW-9S

MW-3S

MW-4S

MW-5D

MW-2D

MW-3D

MW-4D

MW-1D

MW-16S

MW-12S

MW-13S

MW-15S

MW-14D

MW-15D

MW-13D

MW-12D

MW-15B

MW-12B

MW-107S

MW-104S

MW-103S

MW-105S

MW-101S

MW-106S

MW-102SMW-102D

MW-106D

MW-104D

MW-103D

MW-105D

MW-107D

MW-101B

MW-105B

SITE BLDG WELL

SG-01

SG-02

SG-03

EW-04

ASHIPPUNWWTP

WETLANDS

DAVY CREEK

0 100 200

Feet

FIGURE 1-2Site FeaturesOECI SiteAshippun, WI

LEGEND

SITE INSTRUMENTATION

BEDROCK MONITORING WELL

DEEP UNCONSOLIDATED MONITORING WELL

SHALLOW UNCONSOLIDATED MONITORING WELL

DRIVE POINT WELL

ABANDONED EXTRACTION WELL

MONITORING WELL

RESIDENTIAL WELL

DEEP UNCONSOLIDATED SENTINEL WELL

SHALLOW UNCONSOLIDATED SENTINEL WELL

STAFF GAUGE

CURRENT SITE BUILDING

FORMER OECI SITE BUILDING

FORMER OECI SITE BOUNDARY

FENCED AREA

ELEVATION CONTOUR (FT ABOVE MEAN SEA LEVEL)CONTOUR INTERVAL = 2FT

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850

NOTES

1. BASE MAP DEVELOPED FROM INFORMATION PROVIDED BY RMT, INC. ON 10/26/04

2. BASE MAP DEVELOPED FROM AERIAL PHOTOGRAPHS DATED 3/26/1999 PREPARED BY AEROMETRICS, INC., SHEBOYGAN, WISCONSIN.

3. VERTICAL DATUM (ELEVATION) IS REFERENCED TO USGS MEAN SEA LEVEL DATUM, 1929 ADJUSTMENT. TOPOGRAPHIC CONTOUR INTERVAL: 2 FEET.

4. THE HORIZONTAL DATUM IS BASED ON THE WISCONSIN STATE PLANE COORDINATE SYSTEM, NORTH AMERICAN DATUM (NAD) 1927 - WISCONSIN SOUTH.

5. MONITORING WELL LOCATIONS AND ELEVATIONS ARE BASED ON A SURVEY PERFORMED BY SPATIAL DATA SURVEYS ON DECEMBER 2001, JANUARY 2002, JUNE 2002, AND APRIL 2003.

6. SITE BENCHMARKS ESTABLISHED BASED ON SURVEY FROM BENCHMARK MONUMENT LOCATED ON THE SOUTHWEST CORNER OF THE INTERSECTION OF MAPLETON ROAD AND MILL ROAD. NE 1/4 OF NE 1/4 OF SECTION 8, TOWNSHIP 8 NORTH, RANGE 17 EAST.

7. THE PRIVATE OR SUPPLY WELLS SHOWN ON THIS MAP REPRESENT A PORTION OF THE PRIVATE WELLS SERVING THE RESIDENTS OR BUSINESSES IN THE TOWN OF ASHIPPUN, AND REPRESENT A PORTION OF THESE WELLS THAT LIKELY EXIST WITHIN THE CONFINED AREA OF THIS MAP.

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20,000 gal; A-36 Steel

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4,000 gal; Steel

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2,000 gal; Steel

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2,000 gal; Steel

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1,200 gal; Steel

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1100 gal; Steel

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832 gal; Resin

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500 gal; Steel

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500 gal; Steel

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4450 gal; Resin

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After the cyanide oxidation & metals precipitation processes were shut down, a Bag Filter System was installed between the air stripper and the GAC filters to capture the iron bacteria and prevent it from clogging the GAC filters. BF-640 & 641 installed between GAC feed pumps (GFP-620 & 621) and the GAC filters (GAC-650 & 651).

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A Sodium Bifulfite System was added to the process to neutralize excess chlorine in the effluent prior to discharge to the wetland subsurface drainage area. Initially injected to the TFT effluent, but changed to the Effluent Holding Tank to ensure there was a chlorine residual in the water to neutralize any bacteria as it passed through the GAC filters. - OECI-TS-SBBT-545 (Sodium Bisulfite Batch Tank); 55 gal polypropylene OECI-TS-SBT-540 (Sodium Bisulfite Tank); 55 gal polyethylene SBTM-544 Sodium Bisulfite Tank Mixer SBP-541 Sodium Bisulfite Pump

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After cyanide & metals shutdown, the sodium hypochlorite injection point was moved to the extraction well discharge piping, upstream of the equalization tank (EQT-100). This was done to reduce the amount of iron bacteria in the system.

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40% SB is transferred by hand pump from the delivered 55 gal barrel to a measured bucket and added to the 55 gal SBBT-545, where is it mixed with water to a 1% solution. After mixing, it's transferred into SBT-540 by hand pump. SBT-540 is mixed by SBTM-544 and is injected into EHT-700 influent line by SBP-541.

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OECI-TS-EQT-100 (13CE02-03)

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OECI-TS-CRT-201/211 (13CE02-02)

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OECI-TS-RMT-301/FT-311 (13CE02-04)

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OECI-TS-RMT-451/FT-461 (13CE02-06)

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OECI-TS-TFT-601 (13CE02-08)

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OECI-TS-C-400 (13CE02-05)

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OECI-TS-TF-600 (13CE02-07)

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OECI-TS-DAS-500 (13CE02-09)

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OECI-TS-GAC-650 (13CE02-10)

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OECI-TS-GAC-651 (13CE02-11)

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OECI-TS-EHT-700 (13CE02-12)

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FIGURE 2-1 Liquid Process Schematic OECI Site Ashippun, WI

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OECI-TS-C-400 (13CE02-05)

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Station Location (Sample Number) *Sample number assigned to samples collected for laboratory analysis.

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CH2MHILL ®

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10,000 gal; A-36 Steel

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2000 gal; A-36 Steel

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3700 gal; Resin

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250 gal, Polypropylene

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This should read, "To Rapid Mix Tank RMT-451"

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Moved to extraction well discharge, upstream of the equalization tank (EQT-100)

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Installed: - OECI-TS-SCBT-255 (Sodium Hypochlorite Batch Tank); 55 gal, polypropylene - OECI-TS-SCT-250-1 (Dilute Sodium Hypochlorite Holding Tank); 55 gal, polypropylene

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Moved to draw from SCT-250-1 and pump to the extraction well feed line to EQT-100

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Sodium Hypochlorite Holding Tank Recirculation Pump (SCTRP-253) installed (formerly PFP-830) to fill SCBT-255 and make 1% Sodium Hypochlorite. Then 1% SC was transferred to SCT-250-1.

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OECI-TS-ST-820 (13CE02-13)

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OECI-TS-PFT-840 (13CE02-14)

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OECI-TS-SCT-250

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OECI-TS-SHT-260

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OECI-TS-PDT-350

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OECI-TS-SAT-750

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100 gal; polyethylene

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FIGURE 2-2 Solids Handling & Chemical Feed Schematic OECI Site Ashippun, WI

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OECI-TS-ST-820 (13CE02-13)

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CH2MHILL ®

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Appendix A Data Quality Evaluation

T E C H N I C A L M E M O R A N D U M Data Usability Evaluation Oconomowoc Electroplating Company, Inc. Site, Ashippun, Wisconsin WA No. 160-RARA-05M8, Contract No. EP-S5-06-01 PREPARED FOR: U.S. Environmental Protection Agency PREPARED BY: Adrienne Korpela/CH2M HILL DATE: August 23, 2013

This memorandum presents the data usability evaluation of the water treatment plant samples collected at the Oconomowoc Electroplating Company, Inc., Site in Ashippun, Wisconsin, from May 21 through 23, 2013. CH2M HILL performed the sampling and field tests, and CT Laboratories, Inc., of Baraboo, Wisconsin, performed the analyses.

Field-Collected Data CH2M HILL performed field tests on a total of 12 samples (rinsate water from 8 tanks, 1 field duplicate, 1 background sample of rinsate water, and samples of residual liquid from 2 tanks). The samples were analyzed in the field for pH and chloride using test kits. Table 1 lists the sample identifications (IDs).

TABLE 1 Field Sample Summary Oconomowoc Electroplating Company, Inc. Site

Sample ID Sample ID

OECI-RW-BKGD2 OECI-TS-SBT-540

OECI-TS-PDT-350 OECI-TS-SCBT-255

OECI-TS-SAT-750 OECI-TS-SCT-250

OECI-TS-SAT-750-liquid OECI-TS-SCT-250-1

OECI-TS-SBBT-545 OECI-TS-SHT-260

OECI-TS-SBBT-545FD OECI-TS-SHT-260-liquid

The data were reviewed to assess the precision in accordance with the site-specific quality assurance project plan (QAPP) addendum (CH2M HILL 2012). The relative percent difference of the field duplicate sample met the precision criteria for pH and chloride.

The sample matrix from OECI-TS-SAT-750-liquid and OECI-TS-SHT-260-liquid would not absorb to the test strip for chloride, resulting in an invalid test. No chloride results are reported for samples OECI-TS-SAT-750-liquid and OECI-TS-SHT-260-liquid.

Analytical Laboratory Data CH2M HILL collected 19 water samples during the field event, including quality control (QC) samples. Samples were analyzed by CT Laboratories, Inc., for one or more of the following U.S. Environmental Protection Agency (USEPA)-approved methods:

1

DATA USABILITY EVALUATION: OCONOMOWOC ELECTROPLATING COMPANY, INC. SITE, ASHIPPUN, WISCONSIN

• Volatile organic compounds (VOCs) by USEPA SW-846 Method 8260C • Semivolatile organic compounds (SVOCs) by USEPA SW-846 Method 8270D • Total metals by USEPA SW-846 Method 6010C/7470A

As part of the quality assurance (QA) process outlined in the QAPP addendum (CH2M HILL 2012), the field team collected QC samples to aid in the assessment of overall data quality and usability. The QC samples collected were field duplicates, aliquots for laboratory matrix spike (MS)/matrix spike duplicates (MSDs), a rinsate water background sample, and an equipment blank. A VOC trip blank sample was supplied by the laboratory.

The data set was reviewed by the USEPA Environmental Service Assistance Team’s (ESAT’s) contractor, TechLaw. Validation reports are in Attachment 1. Individual method requirements and guidelines from the QAPP Addendum (CH2M HILL 2012), Contract Laboratory Program National Functional Guidelines for Superfund Organic Methods Data Review (USEPA 2008), and Contract Laboratory Program National Functional Guidelines for Superfund Inorganic Methods Data Review (USEPA 2004) were used in this assessment.

USEPA validators added data qualifiers when the QC statistics indicated a possible bias to specific compounds or analytes associated with a particular method and sample batch.

Standard data qualifiers were used as a means of classifying the data with regard to their conformance to QC requirements. The applied data qualifiers are defined in the validation reports provided in Attachment 1.

Findings CH2M HILL reviewed the validation performed by USEPA for the water samples in sample delivery group (SDG) 97523. Table 2 lists the IDs and station locations that were reviewed (100 percent of all samples collected).

TABLE 2 Sample Summary by Laboratory ID and Station Location

Oconomowoc Electroplating Company, Inc. Site Sample ID Location Sample ID Location

13CE02-01 OECI-RW-BKGD1 13CE02-11 OECI-TS-GAC-651

13CE02-02 OECI-TS-CRT-201/211 13CE02-12 OECI-TS-EHT-700

13CE02-03 OECI-TS-EQT-100 13CE02-13 OECI-TS-ST-820

13CE02-04 OECI-TS-RMT-301/FT-311 13CE02-14 OECI-TS-PFT-840

13CE02-05 OECI-TS-C-400 13CE02-16 OECI-TS-EB(05212013)

13CE02-06 OECI-TS-RMT-451/FT-461 13CE02-17 OECI-TS-TB(05232013)

13CE02-07 OECI-TS-TF-600 13CE02-18 OECI-TS-IDW

13CE02-08 OECI-TS-TFT-601 13CE02-19 OECI-TS-GAC-650-FD

13CE02-09 OECI-TS-DAS-500 13CE02-20 OECI-TS-GAC-651-FD

13CE02-10 OECI-TS-GAC-650 - -

The USEPA validation narratives indicate that some sample results should be qualified as biased based on applicable QC statistics or other National Functional Guidelines requirements. The narratives are presented in Attachment 1. Three results were rejected.

• The percent recoveries for 4-chloroaniline, 3-nitroaniline, and 3,3’-dichlorobenzidine were less than 10 percent in the MS or MSD for sample 13CE02-13. The compounds were not detected in the unspiked sample and were qualified “R” as unusable.

The data set completeness is 99.9 percent usable and can be used in the project decision making process with qualification.

2

DATA USABILITY EVALUATION: OCONOMOWOC ELECTROPLATING COMPANY, INC. SITE, ASHIPPUN, WISCONSIN

3

Conclusions The USEPA validation reports were verified to comply with the applicable National Functional Guidelines for data review. The verification confirmed that the validation performed by USEPA was complete for the entire data set analyzed by CT Laboratories, Inc. Qualified data are considered usable for the project decision making process. The project data quality objectives established a completeness goal for the project at 90 percent. The percent completeness for the groundwater data is 99.9 percent (0.1 percent of the data were rejected) and met the established data quality objectives set forth in the quality assurance project plan (CH2M HILL 2012).

Data summary tables of the results have been provided as an attachment to the Data Evaluation Report, Oconomowoc Electroplating Company, Inc., Ashippun, Wisconsin, Water Treatment Plant Equipment Sampling, August 2013. An electronic file of the data also will be submitted as part of this deliverable.

References Cited CH2M HILL. 2012. Quality Assurance Project Plan Addendum, Oconomowoc Electroplating Company, Inc. Site, Ashippun, Wisconsin. WA No. 160‐RARA‐05M8 Contract No. EP‐S5‐06‐01. October.

U.S. Environmental Protection Agency (USEPA). 2008. Contract Laboratory Program National Functional Guidelines for Superfund Organic Methods Data Review. June.

U.S. Environmental Protection Agency (USEPA). 2004. Contract Laboratory Program National Functional Guidelines for Inorganic Data Review. October.

Attachment 1 Validation Narratives

UNITED STATES ENVIRONMENTAL PROTECTION AGENCY REGION V

SUPERFUND DIVISION DATE: SUBJECT: Review of Data Received for Review on: July 8, 2013 FROM: Timothy Prendiville, Supervisor (SR-6J) Superfund Contract Management Section TO: Data User: Ch2mHill Email: [email protected]; [email protected] Level 4 Manual Data Validation We have reviewed the data for the following case: SITE Name: Oconomowoc Electroplating Co. (WI) SAS Client No.: 13CE02 Job Number: 97523 SDG Number: 13CE02-01SVOA Number and Type of Samples: 18 Waters (Semivolatiles) Sample Numbers: 13CE02-01 thru 13CE02-14, 13CE02-16, 13CE02-18 thru 13CE02-20 Laboratory: CT Laboratories Hrs for Review: Following are our findings: CC: Howard Pham Region 5 TPO

Mail Code: SA-5J

mailto:[email protected]


Page 2 of 13 SAS Number: 13CE02 SDG Number: 13CE02-01SVOA Site Name: Oconomowoc Electroplating Co. (WI) Laboratory: CT Laboratories Below is a summary of the out-of-control audits and the possible effects on the data for this case: Eighteen (18) water samples, 13CE02-01 thru 13CE02-14, 13CE02-16, and 13CE02-18 thru 13CE02-20; were shipped to CT Laboratories located in Baraboo, WI. The samples were collected on May 21 and 22, 2013 and received May 24, 2013. All samples were received intact. All samples were received within the preferred shipping temperature range of 2 - 6°C with the exception of; 13CE02-10, 13CE02-11, 13CE02-19, and 13CE02-20 (6.4°C), 13CE02-03, 13CE02-06, 13CE02-16, and 13CE02-18 (6.7°C). No samples were qualified for temperature deficiency. The samples were analyzed for semivolatiles (61 compounds) according to SW-846 Method 8270C and the SAS contract for samples collected May 2013.

EPA Lab Station Collection Receipt Extraction Analysis Sample ID Location Date Time Date Date Date 13CE02-01 306243 OECI-RW-BKGD1 5/21/13 13:45 5/24/13 5/28/13 6/1/13 13CE02-02 306253 OECI-TS-CRT-201/211 5/22/13 10:45 5/24/13 5/28/13 6/1/13 13CE02-03 306261 OECI-TS-EQT-100 5/22/13 13:40 5/24/13 5/28/13 6/1/13 13CE02-04 306254 OECI-TS-RMT-301/FT-311 5/22/13 11:00 5/24/13 5/28/13 6/1/13 13CE02-05 306255 OECI-TS-C-400 5/22/13 10:15 5/24/13 5/28/13 6/1/13 13CE02-06 306262 OECI-TS-RMT-451/FT-461 5/22/13 11:30 5/24/13 5/28/13 6/1/13 13CE02-07 306249 OECI-TS-TF-600 5/21/13 14:25 5/24/13 5/28/13 6/1/13 13CE02-08 306250 OECI-TS-TFT-601 5/21/13 14:15 5/24/13 5/28/13 6/1/13 13CE02-09 306256 OECI-TS-DAS-500 5/21/13 13:10 5/24/13 5/28/13 6/1/13 13CE02-10 306257 OECI-TS-GAC-650 5/21/13 12:40 5/24/13 5/28/13 6/1/13 13CE02-11 306258 OECI-TS-GAC-651 5/21/13 12:20 5/24/13 5/28/13 6/1/13 13CE02-12 306265 OECI-TS-EHT-700 5/21/13 12:00 5/24/13 5/28/13 6/1/13 13CE02-13 306251 OECI-TS-ST-820 5/21/13 15:35 5/24/13 5/28/13 6/1/13 13CE02-14 306252 OECI-TS-PFT-840 5/21/13 14:45 5/24/13 5/28/13 6/1/13 13CE02-16 306263 OECI-TS-EB(05212013) 5/21/13 15:45 5/24/13 5/28/13 6/1/13 13CE02-18 306264 OECI-TS-IDW 5/22/13 14:00 5/24/13 5/28/13 6/1/13 13CE02-19 306259 OECI-TS-GAC-650-FD 5/21/13 12:45 5/24/13 5/28/13 6/1/13 13CE02-20 306260 OECI-TS-GAC-651-FD 5/21/13 12:25 5/24/13 5/28/13 6/1/13

MBW is the semivolatile method blank. LCSW is the semivolatile laboratory control sample. No LCSD analyses were conducted for this sample delivery group. No sample was designated by the samplers for MS/MSD analyses. The laboratory chose sample 13CE02-13 for MS/MSD analysis as extra sample volume was provided. Sample 13CE02-16 was identified as an equipment blank. Sample 13CE02-19 was identified as a field duplicate of sample 13CE02-10. Sample 13CE02-20 was identified as a field duplicate of sample 13CE02-11.

Reviewed by: Christina Rice / TechLaw, Inc.

Date: August 12, 2013

Page 3 of 13 SAS Number: 13CE02 SDG Number: 13CE02-01SVOA Site Name: Oconomowoc Electroplating Co. (WI) Laboratory: CT Laboratories The semivolatile extractions were performed within the technical holding time of 7 days after sample collection and analyzed within the 40 days after extraction; therefore, the results do not require any qualifications.



Page 4 of 13 SAS Number: 13CE02 SDG Number: 13CE02-01SVOA Site Name: Oconomowoc Electroplating Co. (WI) Laboratory: CT Laboratories 1. HOLDING TIME Eighteen (18) water samples, 13CE02-01 thru 13CE02-14, 13CE02-16, and 13CE02-18 thru 13CE02-20; were shipped to CT Laboratories located in Baraboo, WI. The samples were collected on May 21 and 22, 2013 and received May 24, 2013. All samples were received intact. All samples were received within the preferred shipping temperature range of 2 - 6°C with the exception of; 13CE02-10, 13CE02-11, 13CE02-19, and 13CE02-20 (6.4°C), 13CE02-03, 13CE02-06, 13CE02-16, and 13CE02-18 (6.7°C). No samples were qualified for temperature deficiency. The samples were analyzed for semivolatiles (61 compounds) according to SW-846 Method 8270C and the SAS contract for samples collected May 2013. The semivolatile extractions were performed within the technical holding time of 7 days after sample collection and analyzed within the 40 days after extraction; therefore, the results do not require any qualifications. 2. GC/MS TUNING AND GC INSTRUMENT PERFORMANCE All GC/MS tuning complied with the mass list and ion abundance criteria for DFTPP, and all samples were analyzed within the twelve (12) hour periods for instrument performance checks. All GC/MS tuning had tailing factors less than 2 for Pentachlorophenol and Benzidine, and DDT/Endrin breakdowns less than 20%; therefore, the sample results do not require any qualifications. 3. CALIBRATION One (1) 7-pt initial calibration was completed on May 31, 2013 on instrument SVMS1 using the following concentrations; 50 ug/mL, 40 ug/mL, 30 ug/mL, 20 ug/mL, 10 ug/mL, 5 ug/mL, and 1 ug/mL. The compounds were less than 15% RSD (30% RSD for CCCs) or had Quadratic Regression (QR) coefficient greater than 0.99; therefore, the sample results do not require any qualifications. Two (2) 1-pt initial calibration verifications were conducted on instrument SVMS1 May 31, 2013. The %D for all compounds was less than 20%; therefore, the sample results do not require any qualifications. One (1) 1-pt continuing calibration was conducted on instrument SVMS1 June 1, 2013. The %D for all compounds was less than 20%; therefore, the sample results do not require any qualifications. One (1) 1-pt continuing calibration was conducted on instrument SVMS1 June 4, 2013. The %D for all compounds was less than 20%; therefore, the sample results do not require any qualifications.

Reviewed by: Christina Rice / TechLaw, Inc. Date: August 12, 2013

Page 5 of 13 SAS Number: 13CE02 SDG Number: 13CE02-01SVOA Site Name: Oconomowoc Electroplating Co. (WI) Laboratory: CT Laboratories 4. BLANKS MBW is the semivolatile method blank. The method blank was free of contamination. Sample results do not require any qualifications for this criterion. Sample 13CE02-16 was identified as an equipment blank. The following samples were acquired prior to the time of decontamination and are validated against the equipment blank. 13CE02-01, 13CE02-07, 13CE02-08, 13CE02-09, 13CE02-10, 13CE02-11, 13CE02-12, 13CE02-13, 13CE02-14, 13CE02-19, 13CE02-20 The following semivolatile samples have analyte concentrations reported less than the RL. The associated equipment blank concentration is less than the concentration criteria. Detected compounds are qualified “U”. Reported sample concentrations have been elevated to the RL. bis(2-Ethylhexyl)phthalate 13CE02-01, 13CE02-08, 13CE02-09, 13CE02-11, 13CE02-12, 13CE02-13, 13CE02-14, 13CE02-20 Diethylphthalate 13CE02-07, 13CE02-10, 13CE02-11, 13CE02-12, 13CE02-19, 13CE02-20 Phenol 13CE02-07, 13CE02-08, 13CE02-09, 13CE02-10, 13CE02-11, 13CE02-12, 13CE02-13, 13CE02-19, 13CE02-20 The following semivolatile samples have analyte concentrations reported greater than the RL and less than the equipment blank concentration. The associated equipment blank concentration is greater than the RL. Detected compounds are elevated to the blank concentration and qualified “U”. Ultimately, Dimethylphthalate in sample 13CE02-13 is qualified “UJ” for matrix spike RPD criteria. Dimethylphthalate 13CE02-01, 13CE02-09, 13CE02-10, 13CE02-11, 13CE02-12, 13CE02-13, 13CE02-19, 13CE02-20 Di-n-butylphthalate 13CE02-01, 13CE02-07, 13CE02-08, 13CE02-10, 13CE02-11, 13CE02-12, 13CE02-13, 13CE02-14, 13CE02-19, 13CE02-20 5. SYSTEM MONITORING COMPOUND AND SURROGATE RECOVERY The semivolatile surrogate recoveries were within the laboratory QC limits for all samples; therefore, the results do not require any qualification.


Page 6 of 13 SAS Number: 13CE02 SDG Number: 13CE02-01SVOA Site Name: Oconomowoc Electroplating Co. (WI) Laboratory: CT Laboratories 6. MATRIX SPIKE/MATRIX SPIKE DUPLICATE No sample was designated by the samplers for MS/MSD analyses. The laboratory chose sample 13CE02-13 for MS/MSD analysis as extra sample volume was provided. Pyrene was not included on the Form III MS/MSD recovery sheets. The reviewer cannot determine if Pyrene met percent recovery criteria as the laboratory statistical limits for Pyrene are not included in the data package. The reviewer calculated results are included in the following table for the original (non-diluted) MS/MSD analysis:

SVOA Compound

MSW Spike (ug/L)

MSDW Spike (ug/L)

Source (ug/L)

MSW (ug/L)

MSW %R

MSDW (ug/L)

MSDW %R

%R Limit RPD

RPD Limit

Pyrene 21.1 21.3 1.7 17.1 73.0 12.2 49.3 ? 37.8 0 - 30 The relative percent difference (RPD) between the following semivolatile matrix spike and matrix spike duplicate recoveries is outside the SAS criteria of ± 30%. Detected Diethylphthalate and Pyrene in the unspiked sample, 13CE02-13, are qualified “J”. Non-detected compounds in the unspiked sample are qualified “UJ”. Ultimately, some non-detected compounds are qualified “R” for matrix spike recovery criteria. 13CE02-13MSW, 13CE02-13MSDW 2,6-Dinitrotoluene, 3,3-Dichlorobenzidine, 3-Nitroaniline, 4-Chloroaniline,

4-Nitroaniline, 4-Nitrophenol, bis(2-Chloroethoxy)methane, Diethylphthalate, Dimethylphthalate, Pyrene

The following semivolatile matrix spike/matrix spike duplicate samples have percent recoveries greater than the upper acceptance criteria. The compounds were not detected in the unspiked sample, 13CE02-13. Non-detected compounds in the unspiked sample are not qualified. Ultimately, some non-detected compounds are qualified “UJ” for matrix spike RPD criteria. 13CE02-13MSW bis(2-Chloroethyl)ether 13CE02-13MSDW 2,6-Dinitrotoluene, 4-Nitrophenol The following semivolatile matrix spike/matrix spike duplicate samples have percent recoveries that are less than the expanded lower acceptance limit (10%). The compounds were not detected in the unspiked sample, 13CE02-13. Non-detected compounds in the unspiked sample are qualified “R”.



Page 7 of 13 SAS Number: 13CE02 SDG Number: 13CE02-01SVOA Site Name: Oconomowoc Electroplating Co. (WI) Laboratory: CT Laboratories 13CE02-13MSW 3,3-Dichlorobenzidine 13CE02-13MSDW 3,3-Dichlorobenzidine, 3-Nitroaniline, 4-Chloroaniline 6B. LABORATORY CONTROL SAMPLES LCSW is the semivolatile laboratory control sample. No LCSD analyses were conducted for this sample delivery group. The semivolatile laboratory control sample recoveries were within the laboratory QC limits; therefore, the results do not require any qualification. Pyrene was not included on the Form III LCS recovery sheets. The reviewer cannot determine if Pyrene met percent recovery criteria as the laboratory statistical limits for Pyrene are not included in the data package. Results are summarized in the following table:

SVOA

Compound

LCSW Spike (ug/L)

LCSW (ug/L)

LCSW %R

%R Limit

Pyrene 20.0 17.7 88.5 ? 7. FIELD BLANK AND FIELD DUPLICATE Sample 13CE02-16 was identified as an equipment blank. Results are summarized in the following table:

Blank Type Sample ID

Equipment 13CE02-16

DF 1 Units ug/L Semivolatile Analytes

bis(2-Ethylhexyl)phthalate 0.96 Diethylphthalate 0.56 Dimethylphthalate 12 Di-n-butylphthalate 35 Phenol 0.88

Sample 13CE02-19 was identified as a field duplicate of sample 13CE02-10. Sample 13CE02-20 was identified as a field duplicate of sample 13CE02-11. Results are summarized in the following tables:



Page 8 of 13 SAS Number: 13CE02 SDG Number: 13CE02-01SVOA Site Name: Oconomowoc Electroplating Co. (WI) Laboratory: CT Laboratories

Sample ID 13CE02-10 13CE02-19 DF 1 1 Units ug/L ug/L Semivolatile Analytes RPD

2,4,5-Trichlorophenol 1.6 1.3 21 2-Methylnaphthalene 0.35 0.38 8.2 Acetophenone 0.75 0.79 5.2 bis(2-Chloroisopropyl)ether 1.1 ND 200 bis(2-Ethylhexyl)phthalate 5.0 6.2 21 Butylbenzylphthalate 1.9 1.9 0 Carbazole ND 0.62 200 Dibenzofuran 0.38 0.43 12 Di-n-octylphthalate 0.98 1.0 2.0 Naphthalene 0.50 0.52 3.9 Phenanthrene 0.84 1.1 27

Sample ID 13CE02-11 13CE02-20

DF 1 1 Units ug/L ug/L Semivolatile Analytes RPD

2-Methylnaphthalene 0.61 0.32 62 Acenaphthene 0.28 ND 200 Acetophenone 1.2 0.67 57 Butylbenzylphthalate 2.2 1.3 51 Carbazole 0.49 0.68 32 Dibenzofuran 1.3 0.58 77 Naphthalene 0.45 0.28 47 Phenanthrene 0.93 0.37 86

Results are not qualified based on the results of the field duplicates. 8. INTERNAL STANDARDS The internal standards retention times and area counts for the semivolatile analyses were within the required QC limits (50-200%) for all samples; therefore, the results do not require any qualification.



Page 9 of 13 SAS Number: 13CE02 SDG Number: 13CE02-01SVOA Site Name: Oconomowoc Electroplating Co. (WI) Laboratory: CT Laboratories 9. COMPOUND IDENTIFICATION After reviewing the mass spectra and chromatograms it appears that all semivolatile compounds were properly identified. 10. COMPOUND QUANTITATION AND REPORTED DETECTION LIMITS All samples were waters. All reporting limits were reported in ug/L units. The reporting limits did not meet the SAS required reporting limits due to sampler provided sample volume less than 1000mL. Two (2) semivolatile samples required 10x dilutions. The results from only the diluted analyses are reported. 13CE02-02DL Carbazole, Phenanthrene 13CE02-06DL Carbazole, Di-n-butylphthalate, Phenanthrene The following semivolatile samples have analyte concentrations below the quantitation limit (RL) and above the method detection limit (MDL). Detected compounds are qualified “J”. 13CE02-01 Carbazole 13CE02-02

2-Methylnaphthalene, 3&4-Methylphenol, Benzo(a)pyrene, Benzo(k)fluoranthene, Diethylphthalate, Indeno(1,2,3-cd)pyrene, Phenol 13CE02-03 bis(2-Ethylhexyl)phthalate, Carbazole, Dimethylphthalate

13CE02-04 2-Methylnaphthalene, Acenaphthene, Acetophenone, Benzo(a)pyrene, Benzo(g,h,i)perylene, Benzo(k)fluoranthene, bis(2-Ethylhexyl)phthalate, Dibenzo(a,h)anthracene, Diethylphthalate, Dimethylphthalate, Indeno(1,2,3-cd)pyrene, Phenol 13CE02-05 2-Methylnaphthalene, Acetophenone, Benzo(k)fluoranthene, Butylbenzylphthalate, Dibenzo(a,h)anthracene, Diethylphthalate, Naphthalene, Phenol




13CE02-06 3&4-Methylphenol, Acetophenone, Benzo(a)pyrene, Benzo(g,h,i)perylene, Dibenzo(a,h)anthracene, Diethylphthalate, Indeno(1,2,3-cd)pyrene, Phenol 13CE02-07 Butylbenzylphthalate 13CE02-08 Acetophenone 13CE02-09 Acetophenone, Butylbenzylphthalate 13CE02-10 2,4,5-Trichlorophenol, 2-Methylnaphthalene, Acetophenone, Butylbenzylphthalate, Dibenzofuran, Di-n-octylphthalate, Naphthalene, Phenanthrene 13CE02-11 2-Methylnaphthalene, Acenaphthene, Butylbenzylphthalate, Carbazole, Naphthalene, Phenanthrene 13CE02-12 2,6-Dinitrotoluene, Acetophenone, Butylbenzylphthalate, Carbazole 13CE02-13 Acenaphthene, Benzo(a)anthracene, Benzo(b)fluoranthene, Butylbenzylphthalate, Fluorene, Naphthalene 13CE02-14 Acenaphthene, Butylbenzylphthalate, Dibenzofuran 13CE02-16 bis(2-Ethylhexyl)phthalate, Diethylphthalate, Phenol 13CE02-18 Acetophenone, bis(2-Ethylhexyl)phthalate, Di-n-butylphthalate, Phenanthrene, Phenol 13CE02-19 2,4,5-Trichlorophenol, 2-Methylnaphthalene, Acetophenone, Butylbenzylphthalate, Carbazole, Dibenzofuran, Di-n-octylphthalate, Naphthalene 13CE02-20 2-Methylnaphthalene, Acetophenone, Butylbenzylphthalate, Carbazole, Dibenzofuran, Naphthalene, Phenanthrene



Page 11 of 13 SAS Number: 13CE02 SDG Number: 13CE02-01SVOA Site Name: Oconomowoc Electroplating Co. (WI) Laboratory: CT Laboratories The following semivolatile samples have Pyrene concentrations below the quantitation limit (RL). The laboratory did not include Pyrene on the Form Is. The reviewer calculated the results for Pyrene, but it is unknown what the laboratory method detection limit (MDL) is as it is not provided in the data package. Because the reviewer cannot determine the lower detection limit of Pyrene, detected Pyrene at any concentration below the RL is qualified “J” and reported. 13CE02-03, 13CE02-07, 13CE02-08, 13CE02-11, 13CE02-12, 13CE02-14, 13CE02-18, 13CE02-20 11. SYSTEM PERFORMANCE GC/MS baseline indicated acceptable performance. 12. ADDITIONAL INFORMATION All SAS criteria were met with the following exceptions and highlights: The 7-day holding time to sample extraction and 40 day time to sample analysis identified in Section 8 of the SAS contract were met. The Laboratory’s Analytical Report dated June 18, 2013 indicates that the lab did not meet the 21 calendar day results turnaround time identified in Section 6. All criteria specified in Section 8 of the SAS contract were met. MDL values listed on the Laboratory Form Is were used to evaluate the reported results. The lowest calibration standard was 1 ug/mL. The initial calibration curve contained 7 calibration levels. All criteria specified in Section 9 of the SAS contract were met. Chain-of-Custodies and airbills were included in the data package as required by Section 10 of the SAS contract. However, sample tags were not included with the data package. All criteria stated in Table I of the SAS contract were not met. The required reporting limits were not met due to sampler provided sample volume of less than 1000mL. Semivolatile compound Pyrene was calibrated for but not included on any of the laboratory result forms. The reviewer calculated the results for Pyrene, but it is unknown what the laboratory method detection limit (MDL) is as it is not provided in the data package. Because the reviewer cannot determine the lower detection limit of Pyrene, detected Pyrene at any concentration below the RL is qualified “J” and reported. All criteria stated in Table II of the SAS contract were not met. No LCSD was performed by the laboratory. The MS/MSD met the SAS requirement. Laboratory Form Is were not provided for the LCS, MS, and MSD samples. Pyrene was not included on the Form III LCS and Form III MS/MSD recovery sheets. The reviewer cannot determine if Pyrene met percent recovery criteria as the laboratory statistical limits for Pyrene are not included in the data package. Pyrene was not qualified for LCS, MS, and MSD percent recovery criteria.



The Form Is in PDF format (60 compounds) and Excel Spreadsheet format (Pyrene) with the final qualifiers were generated by the reviewer and included with the deliverable data package.




Data Qualifier Sheet For the purpose of defining the flagging nomenclature utilized in this document, the following code letters and associated definitions are provided: VALUE – if the result is a value greater than or equal to the Contract Required Quantitation Limit (CRQL).

U Indicates that the compound was analyzed for, but not detected. The sample quantitation limit corrected for dilution and percent moisture is reported.

J Indicates an estimated value. This flag is used either when estimating a concentration for a tentatively identified compound or when the data indicates the presence of a compound but the result is less than the sample quantitation limit, but greater than zero. The flag is also used to indicate a reported result having an associated QC problem.

UJ The analyte was not detected above the reported sample quantitation limit. However, the reported quantitation limit is approximate and may or may not represent the action limit of quantitation necessary to accurately and precisely measure the analyte in the sample.

N Indicates presumptive evidence of a compound. This flag is only used for a tentatively identified compound (TIC), where the identification is based on a mass spectral library search.

R Indicates the data are unusable. (The compound may or may not be present.) P Indicates a pesticide/Aroclor target analyte when there is greater than 25%

difference for the detect concentrations between the two GC columns. The lower of the two results is reported.

C Indicates pesticide results that have been confirmed by GC/MS. B Indicates the analyte is detected in the associated method blank as well as the

sample. E Indicates compounds whose concentrations exceeded the calibration range of the

instrument. D Indicates an identified compound in an analysis has been diluted. This flag alert

the data user to any difference between the concentrations reported in the two analyses.

A Indicates TICs that are suspected to be aldol condensation products. G Indicates the TCLP Matrix Spike Recovery was greater than the upper limit of the

analytical method. L Indicates the TCLP Matrix Spike Recovery was less than the lower limit of the

analytical method. T Indicates the analyte is found in the associated TCLP extraction blank as well as

in the sample. X, Y, Z are reserved for laboratory defined flags.



SUPERFUND DIVISION DATE: SUBJECT: Review of Data Received for Review on: July 8, 2013 FROM: Timothy Prendiville, Supervisor (SR-6J) Superfund Contract Management Section TO: Data User: Ch2mHill Email: [email protected]; [email protected] Level 4 Manual Data Validation We have reviewed the data for the following case: SITE Name: Oconomowoc Electroplating Co. (WI) SAS Client No.: 13CE02 Job Number: 97523 SDG Number: 13CE02-01VOA Number and Type of Samples: 19 Waters (Volatiles) Sample Numbers: 13CE02-01 thru 13CE02-14, 13CE02-16 thru 13CE02-20 Laboratory: CT Laboratories Hrs for Review: Following are our findings: CC: Howard Pham Region 5 TPO

Mail Code: SA-5J



Page 2 of 14 SAS Number: 13CE02 SDG Number: 13CE02-01VOA Site Name: Oconomowoc Electroplating Co. (WI) Laboratory: CT Laboratories Below is a summary of the out-of-control audits and the possible effects on the data for this case: Nineteen (19) water samples, 13CE02-01 thru 13CE02-14, and 13CE02-16 thru 13CE02-20; were shipped to CT Laboratories located in Baraboo, WI. The samples were collected between May 21 and 23, 2013 and received May 24, 2013. All samples were received intact. All samples were received within the preferred shipping temperature range of 2 - 6°C with the exception of; 13CE02-10 (6.4°C), 13CE02-03 and 13CE02-06 (6.7°C). No samples were qualified for temperature deficiency. The samples were analyzed for volatiles (46 compounds) according to SW-846 Method 8260C and the SAS contract for samples collected January 2007 - May 2013.

EPA Lab Station Collection Receipt Analysis Receipt Sample ID Location Date Time Date Date pH 13CE02-01 306243 OECI-RW-BKGD1 5/21/13 13:45 5/24/13 5/25/13 < 2 13CE02-02 306253 OECI-TS-CRT-201/211 5/22/13 10:45 5/24/13 5/26/13 < 2 13CE02-03 306261 OECI-TS-EQT-100 5/22/13 13:40 5/24/13 5/26/13 7 13CE02-04 306254 OECI-TS-RMT-301/FT-311 5/22/13 11:00 5/24/13 5/26/13 5 13CE02-05 306255 OECI-TS-C-400 5/22/13 10:15 5/24/13 5/26/13 < 2 13CE02-06 306262 OECI-TS-RMT-451/FT-461 5/22/13 11:30 5/24/13 5/26/13 5 13CE02-07 306249 OECI-TS-TF-600 5/21/13 14:25 5/24/13 5/25/13 < 2 13CE02-08 306250 OECI-TS-TFT-601 5/21/13 14:15 5/24/13 5/25/13 < 2 13CE02-09 306256 OECI-TS-DAS-500 5/21/13 13:10 5/24/13 5/26/13 7 13CE02-10 306257 OECI-TS-GAC-650 5/21/13 12:40 5/24/13 5/26/13 < 2 13CE02-11 306258 OECI-TS-GAC-651 5/21/13 12:20 5/24/13 5/26/13 < 2 13CE02-12 306265 OECI-TS-EHT-700 5/21/13 12:00 5/24/13 5/26/13 7 13CE02-13 306251 OECI-TS-ST-820 5/21/13 15:35 5/24/13 5/25/13 < 2 13CE02-14 306252 OECI-TS-PFT-840 5/21/13 14:45 5/24/13 5/26/13 7 13CE02-16 306263 OECI-TS-EB(05212013) 5/21/13 15:45 5/24/13 5/27/13 < 2 13CE02-17 306281 OECI-TS-TB(05232013) 5/23/13 10:00 5/24/13 5/25/13 < 2 13CE02-18 306264 OECI-TS-IDW 5/22/13 14:00 5/24/13 5/27/13 < 2 13CE02-19 306259 OECI-TS-GAC-650-FD 5/21/13 12:45 5/24/13 5/26/13 < 2 13CE02-20 306260 OECI-TS-GAC-651-FD 5/21/13 12:25 5/24/13 5/26/13 < 2

MBW, CCB2, and CCB3 are the volatile method blanks. LCSW is the volatile laboratory control sample. LCS2 is the volatile laboratory control duplicate sample. No sample was designated by the samplers for MS/MSD analyses. The laboratory chose sample 13CE02-13 for MS/MSD analysis as extra sample volume was provided. Sample 13CE02-17 was identified as a trip blank. Sample 13CE02-16 was identified as an equipment blank. Sample 13CE02-19 was identified as a field duplicate of sample 13CE02-10. Sample 13CE02-20 was identified as a field duplicate of sample 13CE02-11.


Page 3 of 14 SAS Number: 13CE02 SDG Number: 13CE02-01VOA Site Name: Oconomowoc Electroplating Co. (WI) Laboratory: CT Laboratories The volatile samples were analyzed within 7 days for unpreserved waters (pH>2) and 14 days for preserved waters (pH<2); therefore, the results do not require any qualifications.



Page 4 of 14 SAS Number: 13CE02 SDG Number: 13CE02-01VOA Site Name: Oconomowoc Electroplating Co. (WI) Laboratory: CT Laboratories 1. HOLDING TIME Nineteen (19) water samples, 13CE02-01 thru 13CE02-14, and 13CE02-16 thru 13CE02-20; were shipped to CT Laboratories located in Baraboo, WI. The samples were collected between May 21 and 23, 2013 and received May 24, 2013. All samples were received intact. All samples were received within the preferred shipping temperature range of 2 - 6°C with the exception of; 13CE02-10 (6.4°C), 13CE02-03 and 13CE02-06 (6.7°C). No samples were qualified for temperature deficiency. The samples were analyzed for volatiles (46 compounds) according to SW-846 Method 8260C and the SAS contract for samples collected January 2007 - May 2013. The volatile samples were analyzed within 7 days for unpreserved waters (pH>2) and 14 days for preserved waters (pH<2); therefore, the results do not require any qualifications. 2. GC/MS TUNING AND GC INSTRUMENT PERFORMANCE All GC/MS tuning complied with the mass list and ion abundance criteria for BFB, and all samples were analyzed within the twelve (12) hour periods for instrument performance checks. 3. CALIBRATION One (1) 8-pt initial calibration was completed on May 24 - 25, 2013 on instrument VMS1 using the following concentrations; 160 ug/L, 80 ug/L, 60 ug/L, 40 ug/L, 20ug/L, 10 ug/L, 5 ug/L, and 1 ug/L. All compounds were less than 15% RSD (30% RSD for CCCs) except Acetone, Isopropylbenzene, and Methylene chloride, which had Quadratic Regression (QR) greater than 0.99; therefore, the sample results do not require any qualifications. Two (2) 1-pt initial calibration verifications were conducted on instrument VMS1 May 25, 2013 using the following concentrations; 80 ug/L and 40 ug/L. The %R for all compounds was within 70 - 130%; therefore, the sample results do not require any qualifications. One (1) 1-pt continuing calibration was conducted on instrument VMS1 May 25, 2013. The following volatile samples are associated with a CCV percent difference (%D) outside criteria (20%). Detected compounds are qualified “J”. Non-detected compounds are qualified “UJ”. 13CE02-01, 13CE02-02, 13CE02-04, 13CE02-05, 13CE02-06, 13CE02-07, 13CE02-08, 13CE02-09, 13CE02-10, 13CE02-11, 13CE02-13, 13CE02-14, 13CE02-17, 13CE02-19, 13CE02-20 Methylene chloride Two (2) 1-pt continuing calibrations were conducted on instrument VMS1 May 26, 2013. The %D for all compounds was less than 20%; therefore, the sample results do not require any qualifications.


Page 5 of 14 SAS Number: 13CE02 SDG Number: 13CE02-01VOA Site Name: Oconomowoc Electroplating Co. (WI) Laboratory: CT Laboratories 4. BLANKS MBW, CCB2, and CCB3 are the volatile method blanks. Results are summarized in the following table:

Sample ID MBW CCB2 CCB3 DF 1 1 1 Units ug/L ug/L ug/L Volatile Analytes

Analysis Date/Time 05/25/13 20:33 05/26/13 09:19 05/26/13 23:01 Acetone 3.59 (>RL) 2.39 (>RL) 1.39 Chloromethane -- 0.058 -- Methylene chloride 0.395 0.267 0.581

Associated samples:

LCSW, 13CE02-01, 13CE02-02, 13CE02-04, 13CE02-05, 13CE02-06, 13CE02-07, 13CE02-08, 13CE02-09, 13CE02-10, 13CE02-11, 13CE02-13, 13CE02-14, 13CE02-17, 13CE02-19, 13CE02-20

LCS2, 13CE02-03, 13CE02-10, 13CE02-12

13CE02-03, 13CE02-13MS, 13CE02-13MSD, 13CE02-16, 13CE02-18

The following volatile samples have analyte concentrations reported less than the RL. The associated method blank concentration is less than the concentration criteria. Detected compounds are qualified “U”. Reported sample concentrations have been elevated to the RL. Ultimately, Methylene chloride is qualified “UJ” for CCV criteria. Acetone 13CE02-16 Chloromethane 13CE02-12 Methylene chloride 13CE02-10, 13CE02-11, 13CE02-13, 13CE02-14, 13CE02-16, 13CE02-19, 13CE02-20 The following volatile samples have analyte concentrations reported greater than the RL and less than the method blank concentration. The associated method blank concentration is greater than the RL. Detected compounds are elevated to the blank concentration and qualified “U”.



Page 6 of 14 SAS Number: 13CE02 SDG Number: 13CE02-01VOA Site Name: Oconomowoc Electroplating Co. (WI) Laboratory: CT Laboratories Acetone 13CE02-01 Sample 13CE02-17 was identified as a trip blank. Sample 13CE02-16 was identified as an equipment blank. The following samples were acquired prior to the time of decontamination and are validated against the equipment blank. 13CE02-01, 13CE02-07, 13CE02-08, 13CE02-09, 13CE02-10, 13CE02-11, 13CE02-12, 13CE02-13, 13CE02-14, 13CE02-19, 13CE02-20 The following volatile samples have analyte concentrations reported less than the RL. The associated equipment blank concentration is less than the concentration criteria. Detected compounds are qualified “U”. Reported sample concentrations have been elevated to the RL. 1,1,1-Trichloroethane 13CE02-10, 13CE02-11, 13CE02-19 Benzene 13CE02-12 Chloromethane 13CE02-09 Ethylbenzene 13CE02-07, 13CE02-08, 13CE02-09, 13CE02-12, 13CE02-14, 13CE02-20 m,p-Xylene 13CE02-08, 13CE02-12, 13CE02-14 o-Xylene 13CE02-07, 13CE02-08, 13CE02-12, 13CE02-14 The following volatile samples have analyte concentrations reported less than the RL. The associated equipment blank concentration is greater than the RL. Detected compounds are qualified “U”. Reported sample concentrations have been elevated to the RL. Carbon disulfide 13CE02-07, 13CE02-11 Tetrachloroethene 13CE02-14 The following volatile samples have analyte concentrations reported greater than the RL and less than the equipment blank concentration. The associated equipment blank concentration



Page 7 of 14 SAS Number: 13CE02 SDG Number: 13CE02-01VOA Site Name: Oconomowoc Electroplating Co. (WI) Laboratory: CT Laboratories is greater than the RL. Detected compounds are elevated to the blank concentration and qualified “U”. Carbon disulfide 13CE02-01 Chloroform 13CE02-10, 13CE02-11, 13CE02-13, 13CE02-14, 13CE02-19, 13CE02-20 5. SYSTEM MONITORING COMPOUND AND SURROGATE RECOVERY The SAS QC requirement for surrogate recoveries is 75% - 135%. The following volatile sample has one or more DMC/SMC recovery values less than the primary lower limit but greater than or equal to the expanded lower limit of the criteria window. Detected compounds are qualified “J”. Non-detected compounds are qualified “UJ”. 13CE02-18

Trichloroethene, Toluene, Tetrachloroethene, Ethylbenzene, o-Xylene, m,p-Xylene, Styrene, Isopropylbenzene

6. MATRIX SPIKE/MATRIX SPIKE DUPLICATE

No sample was designated by the samplers for MS/MSD analyses. The laboratory chose sample 13CE02-13 for MS/MSD analysis as extra sample volume was provided. The SAS QC requirement for MS/MSD recoveries is 60% - 130% and RPD less than 30%. The relative percent difference (RPD) between the following volatile matrix spike and matrix spike duplicate recoveries is outside the SAS criteria of 30%. Detected Acetone in the unspiked sample, 13CE02-13, is qualified “J”. 13CE02-13MSW, 13CE02-13MSDW Acetone The following volatile matrix spike/matrix spike duplicate samples have percent recoveries greater than the upper acceptance criteria. Detected Acetone in the unspiked sample, 13CE02-13, is qualified “J”. Non-detected compounds in the unspiked sample are not qualified. 13CE02-13MSW Acetone 13CE02-13MSDW 1,2,3-Trichlorobenzene, 1,2,4-Trichlorobenzene, Dichlorodifluoromethane



Page 8 of 14 SAS Number: 13CE02 SDG Number: 13CE02-01VOA Site Name: Oconomowoc Electroplating Co. (WI) Laboratory: CT Laboratories The following volatile matrix spike/matrix spike duplicate samples have percent recoveries greater than or equal to the expanded lower acceptance limit (10%) but less than the primary lower acceptance limit. Detected Acetone and m,p-Xylene in the unspiked sample, 13CE02-13, is qualified “J”. Non-detected Styrene in the unspiked sample is qualified “UJ”. 13CE02-13MSW m,p-Xylene, Styrene 13CE02-13MSDW Acetone, Styrene 6B. LABORATORY CONTROL SAMPLES LCSW is the volatile laboratory control sample. LCS2 is the volatile laboratory control duplicate sample. The SAS QC requirement for LCS/LCSD recoveries is 60% - 130% and RPD less than 30%. The volatile LCS/LCSD recoveries and RPD were within the SAS QC limits; therefore, the results do not require any qualification. 7. FIELD BLANK AND FIELD DUPLICATE Sample 13CE02-17 was identified as a trip blank. Sample 13CE02-16 was identified as an equipment blank. Results are summarized in the following tables:


Equipment 13CE02-16

DF 1 Units ug/L Volatile Analytes

1,1,1-Trichloroethane 0.029 Benzene 0.094 Bromochloromethane 0.056 Carbon disulfide 0.83 (>RL) Chloroform 1.1 (>RL) Chloromethane 0.099 cis-1,2-Dichloroethene 0.24 (>RL) Ethylbenzene 0.036 m,p-Xylene 0.096 o-Xylene 0.041 Tetrachloroethene 0.32 (>RL) Toluene 0.22 (>RL)


Page 9 of 14 SAS Number: 13CE02 SDG Number: 13CE02-01VOA Site Name: Oconomowoc Electroplating Co. (WI) Laboratory: CT Laboratories


Trip 13CE02-17

DF 1 Units ug/L Volatile Analytes

Acetone 4.5 (>RL) Toluene 0.036

Sample 13CE02-19 was identified as a field duplicate of sample 13CE02-10. Sample 13CE02-20 was identified as a field duplicate of sample 13CE02-11. Results are summarized in the following tables:

Sample ID 13CE02-10 13CE02-19 13CE02-10 DF 1 1 2 Units ug/L ug/L ug/L Volatile Analytes RPD RPD

2-Butanone 37 40 7.8 -- -- 2-Hexanone 0.92 0.93 1.1 -- -- 4-Methyl-2-pentanone 15 16 6.5 -- -- Acetone 15 18 18 -- -- Benzene 0.26 0.23 12 -- -- Bromodichloromethane 0.21 0.20 4.9 -- -- Bromomethane 0.26 0.27 3.8 -- -- Chlorobenzene 0.12 0.11 8.7 -- -- Chloroethane 0.44 0.34 26 -- -- Chloromethane 0.42 0.41 2.4 -- -- Dibromochloromethane ND 0.074 200 -- -- Ethylbenzene 0.32 0.30 6.5 -- -- m,p-Xylene 0.72 0.68 5.7 -- -- o-Xylene 0.34 0.33 3.0 -- -- Toluene -- 16 -- 18 12 Trichloroethene 0.26 0.25 3.9 -- --




Sample ID 13CE02-11 13CE02-20 DF 1 1 Units ug/L ug/L Volatile Analytes RPD

2-Butanone 38 29 27 4-Methyl-2-pentanone 17 13 27 Acetone 16 14 13 Benzene 0.49 0.33 39 Bromodichloromethane 0.19 0.15 24 Bromomethane 0.15 0.23 42 Chlorobenzene 0.15 0.045 110 Chloroethane 0.51 0.18 96 Chloromethane 0.44 0.25 55 Dibromochloromethane 0.068 0.057 18 Ethylbenzene 0.18 ND 200 m,p-Xylene 0.31 0.32 3.2 o-Xylene 0.17 0.13 27 Toluene 11 3.3 110 Trichloroethene 0.28 0.087 110

Results are not qualified based on the results of the field duplicates. 8. INTERNAL STANDARDS The internal standards retention times and area counts for the volatile analyses were within the required QC limits (50-200%) for all samples; therefore, the results do not require any qualification. 9. COMPOUND IDENTIFICATION After reviewing the mass spectra and chromatograms it appears that all volatile compounds were properly identified. 10. COMPOUND QUANTITATION AND REPORTED DETECTION LIMITS All samples were waters. All reporting limits were reported in ug/L units. The reporting limits met the SAS required reporting limits. Two (2) volatile samples required dilutions. The results from only the diluted analyses are reported for the following compounds.



Page 11 of 14 SAS Number: 13CE02 SDG Number: 13CE02-01VOA Site Name: Oconomowoc Electroplating Co. (WI) Laboratory: CT Laboratories 13CE02-03DL (10x) Acetone 13CE02-10DL (2x) Toluene The following volatile samples have analyte concentrations below the quantitation limit (RL) and above the method detection limit (MDL). Detected compounds are qualified “J”. 13CE02-01 Carbon tetrachloride, Chlorobenzene, Chloromethane 13CE02-02 Dibromochloromethane, Ethylbenzene 13CE02-03

Benzene, Dibromochloromethane, Ethylbenzene, m,p-Xylene, o-Xylene, Trichloroethene 13CE02-04 Chlorobenzene, Dibromochloromethane 13CE02-05 Ethylbenzene 13CE02-07 4-Methyl-2-pentanone, Chlorobenzene, Dibromochloromethane 13CE02-08 4-Methyl-2-pentanone, Chlorobenzene, Chloroethane 13CE02-10 2-Hexanone 13CE02-11 Dibromochloromethane 13CE02-12 4-Methyl-2-pentanone, Chlorobenzene 13CE02-13 4-Methyl-2-pentanone, Carbon tetrachloride, Dibromochloromethane




13CE02-16 1,1,1-Trichloroethane, Benzene, Bromodichloromethane, Chloromethane, Ethylbenzene, m,p-Xylene, o-Xylene 13CE02-17 Toluene 13CE02-18 Carbon disulfide, Ethylbenzene, Tetrachloroethene 13CE02-19 2-Hexanone, Dibromochloromethane 13CE02-20 Chlorobenzene, Chloroethane, Dibromochloromethane, Trichloroethene MBW Methylene chloride CCB2 Methylene chloride, Chloromethane CCB3 Acetone, Methylene chloride

11. SYSTEM PERFORMANCE GC/MS baseline indicated acceptable performance. 12. ADDITIONAL INFORMATION All SAS criteria were met with the following exceptions and highlights: Not all mass spectra for samples and standards were provided in the data package. Most of the raw data provided was labeled “not reviewed”. No data was qualified for these discrepancies. All field samples were preserved with HCl in the field as required by Section 7 of the SAS contract, however, not all samples were received with pH<2. The volatile samples were analyzed within 7 days for unpreserved waters (pH>2) and 14 days for preserved waters (pH<2); therefore, the results do not require any qualifications. The Laboratory’s Analytical Report dated June 18, 2013 indicates that the lab did not meet the 21 calendar day results turnaround time identified in Section 6.



Page 13 of 14 SAS Number: 13CE02 SDG Number: 13CE02-01VOA Site Name: Oconomowoc Electroplating Co. (WI) Laboratory: CT Laboratories All criteria specified in Section 8 of the SAS contract were met. MDL values listed on the Laboratory Form Is were used to evaluate the reported results. The lowest calibration standard was 1 ug/L. The initial calibration curve contained 8 calibration levels. The initial calibration and continuing calibrations were performed as a 25 mL purge, the initial calibration verifications were performed as a 5 mL purge. All criteria specified in Section 9 of the SAS contract were met. Chain-of-Custodies and airbills were included in the data package as required by Section 10 of the SAS contract. However, sample tags were not included with the data package. All criteria stated in Table I of the SAS contract were met. All criteria stated in Table II of the SAS contract were met. Laboratory Form Is (or equivalent) were not provided for the following QC samples: CCB2, CCB3, LCSW, LCS2, MSW, and MSDW. A Laboratory Form III was provided for the LCS sample but not the LCSD. The reviewer calculated the RPD results for the LCS/LCSD. The Injection Log Summary Report identifies some samples identified and used simultaneously to satisfy multiple method requirements. The analytical injection at 07:58 on May 26, 2013 was used as both a continuing calibration standard and a LCS QC sample. The analytical injection at 09:19 on May 26, 2013 was used as both a continuing calibration blank and a method blank. The analytical injection at 21:40 on May 26, 2013 was used as both a continuing calibration blank and a method blank. This ‘practice’ is very non-typical for Region 5 deliverables.

The Sample Results (Form Is) in PDF format had final qualifiers added by the reviewer and included with the deliverable data package.




Data Qualifier Sheet For the purpose of defining the flagging nomenclature utilized in this document, the following code letters and associated definitions are provided: VALUE – if the result is a value greater than or equal to the Contract Required Quantitation Limit (CRQL).

U Indicates that the compound was analyzed for, but not detected. The sample quantitation limit corrected for dilution and percent moisture is reported.

J Indicates an estimated value. This flag is used either when estimating a concentration for a tentatively identified compound or when the data indicates the presence of a compound but the result is less than the sample quantitation limit, but greater than zero. The flag is also used to indicate a reported result having an associated QC problem.

UJ The analyte was not detected above the reported sample quantitation limit. However, the reported quantitation limit is approximate and may or may not represent the action limit of quantitation necessary to accurately and precisely measure the analyte in the sample.

N Indicates presumptive evidence of a compound. This flag is only used for a tentatively identified compound (TIC), where the identification is based on a mass spectral library search.

R Indicates the data are unusable. (The compound may or may not be present.) P Indicates a pesticide/Aroclor target analyte when there is greater than 25%

difference for the detect concentrations between the two GC columns. The lower of the two results is reported.

C Indicates pesticide results that have been confirmed by GC/MS. B Indicates the analyte is detected in the associated method blank as well as the

sample. E Indicates compounds whose concentrations exceeded the calibration range of the

instrument. D Indicates an identified compound in an analysis has been diluted. This flag alert

the data user to any difference between the concentrations reported in the two analyses.

A Indicates TICs that are suspected to be aldol condensation products. G Indicates the TCLP Matrix Spike Recovery was greater than the upper limit of the

analytical method. L Indicates the TCLP Matrix Spike Recovery was less than the lower limit of the

analytical method. T Indicates the analyte is found in the associated TCLP extraction blank as well as

in the sample. X, Y, Z are reserved for laboratory defined flags.


Regional Transmittal Form


DATE: 7/24/13 SUBJECT: Review of Data Received for review on 7/8/13 FROM: Timothy Prendiville, Supervisor, Chief (SR-6J) Superfund Contract Management Section TO: Data User: CH2M Hill

Email address: [email protected] LEVEL 4 DATA VALIDATION We have reviewed the data for the following case: SITE NAME: _Oconomowoc Electroplating (WI) CASE NUMBER: 13CE02 SDG NUMBER: _13CE02-01 INO Number and Type of Samples: _18 waters (metals) Sample Numbers: _13CE02-01 thru -14, -16, -18 thru -20 Laboratory: CT Laboratories Hrs. for Review: __ Following are our findings: CC: Howard Pham Region 5 TPO Mail Code: SA-5J

Case: 13CE02 SDG: 13CE02-01 INO Page 2 of 4 Site: Oconomowoc Electroplating Laboratory: CT Labs

Narrative Eighteen (18) water samples, numbered 13CE02-01 thru -14, -16, -18 thru -20, were collected on May 21-22, 2013. The lab received the samples on May 24, 2013. All except 13CE02-03, -06, -16 and -18 were received in good condition. The listed samples were received above the upper temperature limit. Region 5 does not qualify sample results for exceeded temperatures. All samples were analyzed for arsenic, barium, cadmium, chromium, lead, mercury, selenium and silver. The samples were analyzed using the SW846 6010C (ICP-OES) and 7470A (mercury) analysis procedures.

Lab ID Sample ID Sample Point Sample Date Sample Time 306243 13CE02-01 OECI-RW-BKGD1 5/21/2013 13:45 306253 13CE02-02 OECI-TS-CRT-201/211 5/22/2013 10:45 306261 13CE02-03 OECI-TS-EQT-100 5/22/2013 13:40 306254 13CE02-04 OECI-TS-RMT-301/FT-311 5/22/2013 11:00 306255 13CE02-05 OECI-TS-C-400 5/22/2013 10:15 306262 13CE02-06 OECI-TS-RMT-451/FT-461 5/22/2013 11:30 306249 13CE02-07 OECI-TS-TF-600 5/21/2013 14:25 306250 13CE02-08 OECI-TS-TFT-601 5/21/2013 14:15 306256 13CE02-09 OECI-TS-DAS-500 5/21/2013 13:10 306257 13CE02-10 OECI-TS-GAC-650 5/21/2013 12:40 306258 13CE02-11 OECI-TS-GAC-651 5/21/2013 12:20 306265 13CE02-12 OECI-TS-EHT-700 5/21/2013 12:00 306251 13CE02-13 OECI-TS-ST-820 5/21/2013 15:35 306252 13CE02-14 OECI-TS-PFT-840 5/21/2013 14:45 306263 13CE02-16 OECI-TS-EB(05212013) 5/21/2013 15:45 306264 13CE02-18 OECI-TS-IDW 5/22/2013 14:00 306259 13CE02-19 OECI-TS-GAC-650-FD 5/21/2013 12:45 306260 13CE02-20 OECI-TS-GAC-651-FD 5/21/2013 12:25

Evidential Audit: All provided reporting forms are CLP-like documents. All documents provided are copies. No location is noted for the originals. No DC-1 or DC-2 Forms or sample tags were provided. The MDL Form does not include the date of analysis. MDL and linearity values provided on the Forms and calibration summary provided were used for evaluating the data. ICP-OES: Section 8(d) of the SAS requires that the reporting limit (RL) must be shown to have been met before any samples are analyzed. No RL sample was analyzed. The lowest point on the calibration curve is used for the evaluation of the reporting limits. For elements where the lowest calibration point is greater than the SAS required reporting limit, all sample results greater than the detection limit but less than the low calibration point are estimated “J.” For As, sample results for 13CE02-02, -04, -07 thru -10, -13, -14, -18 and -19 are between the MDL

Reviewed by: Stephen Connet Date: July 24, 2013


and the SAS required RL; they are considered estimated “J.” For Ba, the lowest calibration point is greater than the SAS required RL; however, all sample results are either less than the MDL “U” or greater than the upper calibration point. All sample results are less than the upper linear range of the instrument and less than the concentration of CCV1. The matrix duplicate RPD, matrix spike and matrix spike duplicate recoveries and serial dilution results are outside method required limits. All Ba results are estimated “J” for detects and “UJ” for non-detects. For Cd, sample results for 13CE02-04 thru -08, -11, -13 and -18 thru -20 are between the MDL and the SAS required RL; they are considered estimated “J.” For Cr, the lowest calibration point is greater than the SAS required RL. No sample results are between the lowest calibration point and the SAS required RL. One sample result (13CE02-05) is less than the SAS required RL but greater than the MDL. That result is also affected by negative CCBs whose absolute value is greater than the MDL. The sample result for 13CE02-05 is estimated “J-”. The matrix duplicate RPD and matrix spike recovery are outside method required limits. All Cr results are estimated “J” for detects and “UJ” for non-detects. For Pb, the lowest calibration point is greater than the SAS required RL. No sample results are between the SAS required RL. Sample results for 13CE02-04, -06, -07, -11 and -20 are between the MDL and the SAS required RL; they are considered estimated “J.” Sample 13CE02-07 is affected by a CCB greater than the MDL and is estimated “J+”. Samples 13CE02-02, -04, -06, -11 and -18 thru -20 are affected by negative blanks whose absolute value is greater than the MDL and are estimated “J-“. For Se, 3 CCBs and the preparation blank were greater than the MDL. Sample results for 13CE02-01, -05, -10, -11, -13, -14 and -19 are estimated “J+” due to possible contamination. Those results are also greater than the MDL but less than the SAS required RL and are estimated “J.” For Ag, 3 CCBs and the preparation blank were greater than the MDL. Sample results for 13CE02-01, -03, -05, -07, -10 thru -13, -16 and -18 thru -20 are estimated “J+” due to possible contamination. All those results except 13CE02-12 are also greater than the MDL but less than the SAS required RL and are estimated “J.” Mercury: The lowest calibration point is greater than the SAS required RL. The sample results for 13CE02-03 and -14 are between the between the lowest calibration point and the SAS required RL. Sample results for 13CE02-02, -04 thru -07, -09 thru -11 and -18 thru -20 are between the MDL and the SAS required RL; they are all considered estimated “J.” Other comments: Samples 13CE02-10/-19 and -11/-20 were identified as field duplicates. Duplicates were evaluated according to the same criteria as laboratory duplicates. They showed good correlation except -10/-19 Ba, Cr and Pb. Sample 13CE02-16 was identified as a field/equipment blank. Ag was detected in it.



Data Qualifier Sheet Qualifiers Data Qualifier Definitions U The analyte was analyzed for, but was not detected above the reported sample

quantitation limit. J The result is an estimated quantity. The associated numerical value is the

approximate concentration of the analyte in the sample. J+ The result is an estimated quantity, but the result may be biased high. J- The result is an estimated quantity, but the result may be biased low. R The data are unusable. The sample results are rejected due to serious deficiencies in

meeting Quality Control (QC) criteria. The analyte may or may not be present in the sample.

UJ The analyte was analyzed for, but not detected. The reported quantitation limit is

approximate and may be inaccurate or imprecise.


Documents

CH2M HILL · Milwaukee, WI CH2M HILL 135 South 84th Street 53214 Tel 414.272.2426 Fax 414.272.4408 August 26, 2013 430009.CV.01 Mr. William Ryan