MONITORING REPORT, FIRST SEMESTER 2012, EVANS ROAD

166 Eaton Road, Suite B Chico, California 95973 Phone: (530) 342-6958 Fax: (530) 342-2874

J# 1081.17 28 June 2012

Mr. Mike Azevedo Colusa County Public Works Department 1215 Market Street Colusa, CA 95932

MONITORING REPORT, FIRST SEMESTER 2012, EVANS ROAD LANDFILL, COLUSA COUNTY, CALIFORNIA

Dear Mr. Azevedo:

Haling & Associates (H&A) is pleased to present the attached Monitoring Report, First Semester 2012, Evans Road Landfill, Colusa County, California. Monitoring activities were performed in accordance with the Central Valley Regional Water Quality Control Board (CVRWQCB) Waste Discharge Requirements (WDR) and Monitoring and Reporting Program (MRP) No. R5-2002-0124 dated 7 June 2002, and H&A’s contract with the County of Colusa contract number C10-043, dated 9 March 2010.

The scope of work for the current semester included quarterly groundwater elevation measurements, quarterly landfill gas measurements from passive landfill vents, quarterly landfill gas measurements from perimeter soil gas monitoring wells, and semi-annual groundwater sampling and laboratory analysis. The enclosed report includes descriptions and results of these monitoring events. It is important to note that no violations occurred at the Evans Road Landfill during the First Semester 2012.

H&A appreciates the opportunity to work with Colusa County on this important project. If you have questions or comments regarding this report or require additional information, please contact the undersigned at (530) 342-6958. Sincerely, HALING & ASSOCIATES

Greg Haling, P.E. Dave Ivy Principal Engineer Staff Environmental Engineer

Attachments: Semi-Annual Monitoring Report, First Semester 2012 (3 copies)

CD-ROM: Semi-Annual Monitoring Report, First Semester 2012 Electronic spreadsheet w/ current and historical analytical data

CERTIFICATION

This Monitoring Report, First Semester 2012, Evans Road Landfill, Colusa County, California

was prepared for Colusa County Public Works under Contract Number C10-043, dated 9 March

2010. This document was prepared by Mr. Dave Ivy, Staff Environmental Engineer, and

approved for release by Mr. Greg Haling, a registered Professional Engineer in the State of

California.

APPROVED FOR RELEASE:

___________________6/28/12 Greg Haling, P.E. Principal Engineer

Haling and Associates i

TABLE OF CONTENTS

1.0 INTRODUCTION............................................................................................................. 1

1.1 PREFACE .......................................................................................................................... 1 1.2 SITE DESCRIPTION ........................................................................................................... 1

2.0 SCOPE OF WORK .......................................................................................................... 2

3.0 IMPLEMENTATION OF FIELD ACTIVITIES – SECOND SEMESTER 2011...... 3

3.1 FIELD ACTIVITIES AND PROCEDURES............................................................................... 3 3.1.1 Water Elevation Measurements .............................................................................. 3 3.1.2 Groundwater Sampling........................................................................................... 3 3.1.3 Surface Water Monitoring ...................................................................................... 3 3.1.4 Landfill Gas Vent Monitoring................................................................................. 3 3.1.5 Soil Gas Well Monitoring ....................................................................................... 3

3.2 QUALITY ASSURANCE/QUALITY CONTROL METHODS..................................................... 4

4.0 RESULTS OF SECOND SEMESTER 2011 FIELD ACTIVITIES ............................ 4

4.1 GROUNDWATER FLOW CONDITIONS ................................................................................ 4 4.2 GROUNDWATER MONITORING PARAMETERS ................................................................... 5

4.2.1 Groundwater Field Parameters.............................................................................. 5 4.2.2 Groundwater Monitoring Parameters .................................................................... 5 4.2.3 Five-Year Constituents of Concern......................................................................... 7 4.2.4 Quality Assurance/Quality Control ........................................................................ 8

4.3 SURFACE WATER CONDITIONS ........................................................................................ 8 4.4 LANDFILL GAS MEASUREMENTS ..................................................................................... 8

5.0 CONCENTRATION LIMITS ......................................................................................... 9

5.1 METHODS ...................................................................................................................... 10 5.2 RESULTS ........................................................................................................................ 10

6.0 SUMMARY ..................................................................................................................... 11

TABLE OF CONTENTS (CONT.)

Haling and Associates ii

FIGURES

Figure 1 Location Map Figure 2 Site Sketch Figure 3 Groundwater Elevation Measurements Figure 4 Groundwater Potentiometric Surface Map – 19 March 2012 Figure 5 Groundwater Potentiometric Surface Map – 23 May 2012

TABLES

Table 1 Historical Groundwater Elevation Data Table 2 Groundwater Flow Direction and Gradient Table 3 Groundwater Field Parameters Table 4 Semi-annual Groundwater Monitoring Parameters Table 5 Volatile Organic Compounds – Groundwater Table 6 5-Year Constituents of Concern – Groundwater Table 7 5-Year Dissolved Inorganics – Groundwater Table 8 Water Quality Parameters – Surface Water Table 9 5-Year Dissolved Inorganics – Surface Water Table 10 Gas Vent Results Table 11 Soil Gas Monitoring Points Table 12 Volatile Organic Compounds – Soil Gas Table 13 Tolerance Interval Analysis

APPENDICES

Appendix A Graphical Summaries of Groundwater Monitoring Appendix B Monitoring Well Sampling Data Sheets Appendix C Groundwater Hydrographs Appendix D Laboratory Analytical Report and Chain of Custody Documentation

First Semester 2011 Monitoring Report Evans Road Landfill

Haling and Associates 1

1.0 INTRODUCTION

1.1 Preface

This report was prepared as a summary of results for the First Semester 2012 monitoring events at

Evans Road Landfill (ERL). ERL is part of a closed waste management facility that consists of

one closed Class III landfill, three closed Class II surface impoundments, and one pesticide

container disposal area. While in operation, ERL was permitted to receive non-hazardous waste.

ERL is currently maintained by the Colusa County Department of Public Works and is regulated

by Title 27 California Code of Regulations (CCR) through Waste Discharge Requirements

(WDR) Order No. R5-2002-0124 issued by the California Regional Water Quality Control Board,

Central Valley Region (CVRWQCB) on 7 June 2002.

1.2 Site Description

The ERL site is located seven miles southwest of Williams, California, in the southern half of the

northeast quarter and a portion of the southern half of the northwest quarter of Section 15, T14N,

R3W, MDB&M, as shown in Figure 1.

The ERL site is located within a distal portion of northeast draining alluvial fans emanating from

the Coast Ranges. The geologic units underlying the ERL site consist of recent surficial alluvium

to a depth of approximately 57 feet below ground surface, underlain by alluvial deposits of the

Tehama Formation. Groundwater generally occurs within the Tehama Formation at depths

greater than 100 feet.

Five site groundwater monitoring wells (M-1A, M-1B, M-3A, M-4, and M-5) are used to monitor

groundwater conditions at the ERL site. Two locations (S-1 and S-2) have been established to

collect surface storm water runoff during the first significant storms of each rainfall season.

Figure 2 illustrates the site layout and sampling locations.

Previous interpretations of groundwater flow direction at ERL were based on water levels in well

M-1, which historically displayed the highest groundwater elevations. The groundwater elevation

in M-1 started out relatively low in early 1995, at approximately 150 feet below the top of the

casing (btc). In late 1995, M-1 went dry. In 1996, the water level in M-1 recovered to

approximately 147 feet btc. From 1996 to 2000, the water in M-1 steadily rose to approximately

136 feet btc, and then went dry again in 2001, presumably due to a 15 foot drop in water elevation

in one year. The only other well that was monitored through this entire period was M-4. From

1996 to 2000, M-4 rose approximately 7 feet, and dropped approximately 2.5 feet in 2001. In

July 1998, monitoring wells M-1A and M-3A were installed, and monitoring wells M-2 and M-3

were abandoned and sealed by a licensed drilling contractor.



Review of water elevation data for wells M-1 and M-4, and other historical groundwater elevation

data supports the opinion that M-1 was screened in a perched water-bearing zone that was not

likely connected to the shallow water-bearing zone monitored by the other wells. Based on this

interpretation, M-1 was abandoned and M-1B was installed in February 2003.

Since the installation of wells M-1A and M-3A, the interpretation of the direction of groundwater

flow has been in question. In the report entitled, Construction/Testing of Groundwater

Monitoring Wells M-1A and M-3A and Abandonment of M-2 and M-3, Evans Road Landfill,

(Lawrence and Associates, October 1998), Lawrence and Associates (L&A) concluded that M-1A

may be screened in a deeper water bearing zone than monitoring wells M-1, M-3A, and M-4. A

previous review of the L&A boring logs by Montgomery Watson Harza (MWH) found that M-1A

is not deep enough to intercept the same groundwater-bearing zone as M-3A and M-4. Prior to

2003 the interpreted direction of groundwater flow was to the northeast. However, since 2003 the

direction of groundwater flow at the site has been to the southwest.

2.0 SCOPE OF WORK

The scope of work performed for the First Semester 2012 sampling event included the following:

Groundwater:

Measurement of static groundwater elevations at monitoring wells M-1A, M-1B,

M-3A, M-4, and M-5 on 5 March and 23 May 2012.

Purge and sampling of five groundwater monitoring wells (M-4 had insufficient

water for purging) for field parameters (pH, electrical conductivity, turbidity, and

temperature) and groundwater monitoring parameters on 5 March 2012 in

accordance with Monitoring and Reporting Program (MRP) No. R5-2002-0124.

Surface Water:

Inspection of surface water sampling locations S-1 and S-2 for flow on 5 March and

23 May 2012. No flow was present at the designated locations so no samples were

collected.

Landfill Gas:

Field measurement of landfill gas constituents on 5 March and 23 May 2012 at four

sets of nested perimeter soil gas monitoring wells (GW-1 [shallow (S) and deep

(D)], GW-2 [S and D], GW-3 [S and D], and GW-4 [S and D]) and seven passive

landfill gas vents (V-1 through V-7).



3.0 IMPLEMENTATION OF FIELD ACTIVITIES – FIRST SEMESTER 2012

3.1 Field Activities and Procedures

All field activities were performed in accordance with quality assurance/quality control (QA/QC)

procedures and analytical methods for ground water, surface water and soil gas as delineated in

the Sample Collection and Analysis Plan for Evans Road Landfill, (H&A, 4 December 2008).

3.1.1 Water Elevation Measurements

Static groundwater elevation measurements were obtained for all site monitoring wells (M-1A,

M-1B, M-3A, M-4, and M-5) during the First Semester 2012 monitoring events conducted on 5

March and 23 May 2012. Depth-to-water was measured at each groundwater monitoring well to

the nearest hundredth of a foot from each top of well casing with an electrical water-level

sounding probe.

3.1.2 Groundwater Sampling

Groundwater samples were collected from monitoring wells M-1A, M-1B, M-3A, M-4, and M-5

on 5 March 2012 for field and laboratory analyses of semi-annual monitoring parameters.

Samples were collected after a minimum of three well casing volumes were purged and

measurements of groundwater field parameters had stabilized at all wells except M-4, which had

insufficient water for purging. Groundwater samples were collected with Grunfos pump or

disposable bailers and placed in containers provided by the contracted laboratory, stored with ice

(at approximately 4º C) in coolers, and transported under standard chain-of-custody

documentation to a California state-certified laboratory for analysis.

3.1.3 Surface Water Monitoring

Surface water was not present at sampling locations S-1 and S-2 during the First Semester 2012.

Surface water samples were last collected during the first semester 2011.

3.1.4 Landfill Gas Vent Monitoring

Monitoring is performed on the ERL passive landfill gas extraction system as detailed in the

Workplan for Landfill Gas Extraction System, Evans Road Landfill, (H&A, 3 October 2005).

Monitoring of the seven passive landfill gas vents is performed on a quarterly basis using an

infrared gas analyzer capable of detecting methane, carbon dioxide and oxygen content.

3.1.5 Soil Gas Well Monitoring

In accordance with Title 27 CCR (California Code of Regulations) Section 20925, quarterly

monitoring activities are performed at four double completed perimeter soil gas monitoring wells

using an infrared gas analyzer.



3.2 Quality Assurance/Quality Control Methods

The QA/QC program followed by H&A and the laboratory incorporated the following field and

laboratory QA/QC techniques:

chain-of-custody control of samples;

field duplicate sample;

decontamination of field equipment between each sampling location; and

laboratory methods:

matrix spikes (MS); matrix spike duplicates (MSD); method blanks; laboratory control samples (LCS); and laboratory control sample duplicates (LCSD).

4.0 RESULTS OF FIRST SEMESTER 2012 FIELD ACTIVITIES

In order to address concerns expressed in the CVRWQCB review letter dated 26 June 2008 and

the subsequent submittal extension letter dated 14 August 2008, an electronic Excel spreadsheet

with historical analytical data is included as a CD-ROM attachment to this document.

Graphical summaries of historical groundwater VOCs content and monitoring and field parameter

measurements (i.e., time-series analyses) for all monitoring wells are presented in Appendix A.

4.1 Groundwater Flow Conditions

Flow direction and gradient for the first water-bearing unit beneath the landfill is calculated

utilizing three point triangulation methods. Groundwater elevation measurements are

documented on monitoring well sampling data sheets provided in Appendix B, and are presented

in Table 1 and Figure 3.

The groundwater flow direction and gradient estimated from the March 2012 sampling event was

south 51º west at a gradient of 0.0046 ft/ft. The groundwater flow direction and gradient

estimated from the May 2012 sampling event was south 53º west at a gradient of 0.0048 ft/ft.

Current and historic groundwater flow directions and gradients are presented in Table 2.

A groundwater potentiometric surface maps showing estimated groundwater flow conditions are

presented as Figures 4 and 5. Based on MWH’s interpretation of well M-1A, as screened across a

perched aquifer, the groundwater elevation in for well M-1A was not contoured on the

potentiometric surface contour maps for the shallow water-bearing zone.



In accordance with the CVRWQCB letter dated 26 June 2008, hydrographs displaying the

elevation of groundwater with respect to the elevations of the top and bottom of the screened

interval and the elevation of the pump intake for each well are presented in Appendix C.

4.2 Groundwater Monitoring Parameters

Groundwater monitoring parameters analyzed during the First Semester 2012 monitoring event

included field parameters and monitoring parameters in accordance with the ERL MRP No.

R5-2002-0124. Static groundwater elevation measurements were obtained for all site monitoring

wells during the First Semester 2012 monitoring events conducted on 5 March and 23 May 2012.

Groundwater elevation levels are generally consistent with historical data.

4.2.1 Groundwater Field Parameters

Groundwater temperature, pH, turbidity, and electrical conductivity (EC) recorded for samples

collected during the current monitoring period from monitoring wells M-1A, M-1B, M-3A, M-4,

and M-5 were generally within the range of historical data previously recorded for each well.

Recorded field parameters are documented on monitoring well sampling data sheets provided in

Appendix B. Turbidity was measured at the lab, but was analyzed outside the recommended

holding time. Current and historical field parameter measurements are presented in Table 3.

4.2.2 Groundwater Monitoring Parameters

Current and historical measurements of semi-annual groundwater monitoring parameters for the

ERL monitoring wells are presented in Table 4. The laboratory analytical report and

chain-of-custody documentation are provided in Appendix D.

Total dissolved solids (TDS), chloride, sulfate, and nitrate as nitrogen concentrations were

generally within the range of historical data for all site monitoring wells. TDS concentrations in

wells M-1B (570 mg/L) and M-5 (590 mg/L) exceeded the recommended Environmental

Protection Agency (EPA) secondary maximum contaminant level (SMCL) for drinking water of

500 mg/L. All chloride and sulfate concentrations were less than their respective SMCLs (250

mg/L for each) for drinking water. Nitrate as nitrogen concentrations were below the EPA

drinking water maximum contaminant level (MCL) of 10 mg/L for all site monitoring wells

sampled during the current monitoring event. Sodium, magnesium, and bicarbonate

concentrations for samples collected from all site monitoring wells were generally consistent with

previously recorded data, though the sodium value recorded at M-1A (38 mg/L) was an historical

high for that well.

Analyses of groundwater samples for volatile organic compounds (VOCs) were completed for all

monitoring wells sampled during the First Semester 2012. Current and historically detected



VOCs are presented in Table 5. No VOC’s were detected during the First Semester 2012. VOCs

not included in the following discussion of results have not been detected in any landfill

monitoring wells for at least eight consecutive monitoring events.

Napthalene was not detected above the laboratory PQL of 0.50 µg/L in

groundwater samples collected from any site monitoring wells during the First

Semester 2012. Napthalene was detected during previous monitoring events in

samples collected from monitoring well M-1A (March 2010 [5.0 µg/L]), October

2001 [0.79 µg/L]), and in samples collected from monitoring well M-3A (February

2003 [0.21 µg/L]).

1,2,3-Trichlorobenzene was not detected above the laboratory PQL of 0.50 µg/L in


Semester 2012. 1,2,3-Trichlorobenzene was detected during a previous monitoring

event in samples collected from monitoring well M-3A (March 2010 [1.8 µg/L]).

1,2,4-Trichlorobenzene was not detected above the laboratory PQL of 0.50 µg/L in


Semester 2012. 1,2,4-Trichlorobenzene was detected during a previous monitoring

event in samples collected from monitoring well M-1A (March 2010 [2.4 µg/L]).

Chloromethane was not detected above the laboratory PQL of 0.50 µg/L in


Semester 2012. Chloromethane was detected during a previous monitoring event in

samples collected from monitoring wells M-1A (July 2010 [0.80 µg/L], March

2011 [3.80 µg/L]), M-1B (July 2010 [0.76 µg/L] , March 2011 [0.91 µg/L]), M-3A

(January 2009 [0.65 µg/L]) , M-4 (March 2011 [2.70 µg/L]), and M-5 (July 2010

[0.90 µg/L] , March 2011 [4.40 µg/L]).

1,1-Dichloroethane (1,1-DCA) was not detected above the laboratory PQL of 0.50

µg/L in groundwater samples collected from any site monitoring wells during the

First Semester 2012. 1,1-DCA was detected during previous monitoring events in

samples collected from monitoring well M-1B (February 2003 [0.85 µg/L], August

2003 [0.64 µg/L], October 2003 [0.65 µg/L], March 2004 [0.49 µg/L], August 2004

[1.0 µg/L], March 2005 [0.83 µg/L], July 2005 [1.1 µg/L], May 2006 [0.67 µg/L],

March 2007 [0.56 µg/L], August 2007 [0.69 µg/L], August 2008 [0.65 µg/L],

January 2009 [0.65 µg/L], July 2009 [0.63 µg/L], and March 2010 [0.55 µg/L])

Di-isopropyl ether (DIPE) was not detected above the laboratory PQL of 0.50 µg/L

in the groundwater samples collected during the second semester. DIPE was



detected during previous monitoring events in samples collected from site

monitoring wells M-1B (July 2005 [0.81 µg/L], May 2006 [0.52 µg/L], March 2007

[0.79 µg/L], August 2007 [0.60 µg/L], and January 2009 [0.35 µg/L]), and M-5

(July 2005 [0.95 µg/L], May 2006 [0.51 µg/L], October 2006 [0.70 µg/L], March

2007 [0.76 µg/L], August 2007 [0.69 µg/L], August 2008 [0.84 µg/L], January

2009 [0.91 µg/L], July 2009 [0.78 µg/L], March 2010 [0.63 µg/L] ], and July 2010

[0.94 µg/L]).

Ethanol was not detected above the laboratory PQL of 25 µg/L in groundwater

samples collected from any site monitoring wells during the First Semester 2012.

Ethanol was detected during previous monitoring events in samples collected from

site monitoring well M-5 (July 2009 [40 µg/L] and March 2010 [92 µg/L]).

Methyl ethyl ketone was not detected above the laboratory PQL of 1.0 µg/L in


Semester 2012. Methyl ethyl ketone was detected during previous monitoring

events in samples collected from site monitoring wells M-1A (March 2007 [3,500

µg/L, estimated with high bias]), M-1B (March 2007 [45 µg/L, estimated with high

bias]), M-3A (March 2007 [5.3 µg/L, estimated with high bias]), M-4 (March 2007

[8.4 µg/L, estimated with high bias]), and M-5 (March 2007 [6.9 µg/L, estimated

with high bias] and March 2010 [1.1 µg/L]).

Acetone was not detected above the laboratory PQL of 5.0 µg/L in groundwater

samples collected from any site monitoring wells during the First Semester 2012.

Acetone was detected during previous monitoring events in samples collected from

site monitoring wells M-1A (March 2007 [5,200 µg/L, estimated with high bias]),

M-1B (March 2007 [9.7 µg/L, estimated with high bias]), M-3A (March 2007 [9.7

µg/L, estimated with high bias], (March 2011 [7.7 µg/L]), M-4 (October 2006 [5.3

µg/L] , (March 2011 [3.2 µg/L]), and M-5 (August 2003 [3.3 µg/L], March 2004

[12 µg/L] and March 2007 [7.3 µg/L, estimated with high bias]).

4.2.3 Five-Year Constituents of Concern

In accordance with MRP R5-2002-0124, monitoring parameters analyzed as five-year constituents

of concern (COCs) at ERL include total organic carbon, dissolved inorganics, VOCs (EPA Method

8260B, extended list), semi-volatile organic compounds (SVOCs) (EPA Method 8270C),

chlorophenoxy herbicides (EPA Method 8151A), and organophosphorous compounds (EPA

Method 8141A).



Five-year COCs were last measured at monitoring wells M-1B and M-5 during the second

semester 2008, at monitoring well M-1A during second semester 2009, and at monitoring wells M-

3A and M-4 during the second semester 2010. Historic five-year COCs groundwater monitoring

data are provided in Tables 6 and 7.

4.2.4 Quality Assurance/Quality Control

A field duplicate was collected during the March 2012 sampling event as a quality

assurance/quality control measures to monitor laboratory analytical precision. The field duplicate

was collected at monitoring well M-1B and labeled as M-6. The field duplicate was measured for

VOCs by EPA Method 8260B. No VOCs were detected in the M-1B sample or the duplicate

sample M-6 during the March 2012 sampling event.

The spike recovery was outside acceptance limits for the MS and/or the MSD due to analyte

concentration at 4 times or greater the spike concentration. The LCS and/or LCSD were within

acceptance limits showing that the laboratory is in control and the data is acceptable.

No other QA/QC flags were noted by the laboratory for analytical results from matrix spikes,

matrix spike duplicates, laboratory control samples, and laboratory control duplicate samples

during the current semester.

4.3 Surface Water Conditions

Surface water was not present on 5 March and 23 May 2012 at sampling locations S-1 and S-2.

Surface water samples were last collected during the first semester of 2011. Historic semi-annual

surface water analytical results are presented in Table 8. Five-year Constituents of Concern

(COCs) surface water analytical results for monitoring locations S-1 and S-2 were last analyzed in

January 2008 and are summarized in Tables 8 and 9.

4.4 Landfill Gas Measurements

Passive Landfill Gas Vents

First Semester 2012 passive landfill gas vent measurements were completed on 5 March and 23

May 2012 for gas vents V-1 through V-7. Methane was detected on 5 March at landfill gas vent

V-7 at a concentration of 4.4 percent by volume. The methane measurement at the other gas

vents during First Semester 2012 was 0.0 percent by volume. Methane was detected on 23 May

at landfill gas vents V-1, V-2, V-4, V-5, V-6 and V-7 at a concentration of 0.1, 0.2, 1.3, 4.2, 11.6,

and 2.2 percent by volume respectively. The methane measurement at gas vent V-3 during First



Semester 2012 was 0.0 percent by volume. Carbon dioxide and oxygen measurements were also

completed during gas vent monitoring. Current and historical landfill gas measurements are

provided in Table 10.

Soil Gas Monitoring Wells

First Semester 2012 soil gas measurements at four sets of nested perimeter soil gas monitoring

wells were completed on 5 March and 23 May 2012 for shallow (S) and deep (D) soil gas probes

located within the vadose zone at gas wells GW-1 through GW-4. All methane measurements at

gas vents during First Semester 2012 were 0.0 percent by volume. Carbon dioxide and oxygen

measurements were also completed during gas well monitoring. Current and historical soil gas

probe measurements are provided in Table 11 and historic soil gas VOC data is presented in

Table 12.

5.0 CONCENTRATION LIMITS

As specified in WDR No. R5-2002-0124, concentration limits were established for all COCs

following four quarters of monitoring, in accordance with a statistical method pursuant to Title 27

CCR Section 20415. Concentration limits for ERL monitored parameters and COCs are established

and evaluated using the concentration interval method. Concentration limits are re-calculated

following each sampling event, and reflect the upper tolerance interval based on a confidence

level of 95 percent for individual parameter data at background well, M-4 (background well).

The 95% tolerance coefficient used for this statistical analysis implies that at least 95% of

observations from down-gradient wells should fall below the concentration limit. The

concentration limits for the monitoring parameters, field parameters, and five-year COCs are then

compared with the most recent down-gradient well concentrations. If a parameter concentration

detected in a sample from a down-gradient well exceeds the established concentration limit, it is

interpreted as statistically significant evidence of contamination.

M-1A was historically considered the background well for previous statistical analyses. However,

as the last six monitoring events prior to 2010 indicated that groundwater flow direction at ERL is

to the southwest, it is apparent that M-1A is hydraulically down-gradient from the landfill, as is M-

1B, while wells M-3A, M-4, and M-5 are up-gradient of the landfill. Therefore, statistical analysis

to evaluate groundwater monitoring data was modified to use values from well M-4 to establish the

concentration limits, as historically monitoring well M-4 has had the least VOC detections

indicating the well has had limited impacts.



A non-statistical method is used to analyze the VOC data. Exceedence of a PQL for a single

constituent at a monitoring well is considered significant.

5.1 Methods

The TL for groundwater monitoring parameters measured is calculated as follows based on the

entire available data set for monitoring well M-4:

TL = + KS Where: TL the upper tolerance limit

the mean value for a groundwater parameter at a single monitoring well K the one-sided normal tolerance factor S the standard deviation for a groundwater parameter at a single monitoring well

Data for each tested parameter were transformed lognormally prior to calculation of TLs to

produce a normal distribution required by the statistical method. The one-sided normal tolerance

factor was calculated with the aid of a Student’s t-distribution table as follows:

K = tn-1, * sqrt(1+1/n), where n is the number of observations The regular use of ‘J’ flags in results reporting is now well established. Therefore, in accordance

with RCRA Waste Sampling Draft Technical Guidance (EPA, 2002) the use of Cohen’s

Adjustment (utilized in previous reports) is no longer necessary for nitrate as nitrogen data from

M-4. For this report, the nitrate TL was calculated in the same manner as described above.

Comparison of calculated TLs from up-gradient well, M-4, and constituent concentrations

measured in samples collected at down-gradient wells during the First Semester 2012 monitoring

event are provided in Table 13.

5.2 Results

At monitoring well M-1A, measurements of TDS, chloride, sulfate, nitrate as nitrogen, and

Electrical Conductivity (EC) did not exceed the respective concentration limits. The

concentration limit was exceeded for pH and turbidity.

At monitoring well M-1B, measurements of TDS, chloride, sulfate, nitrate as nitrogen, pH, EC,

and turbidity did not exceed the respective concentration limits.

At monitoring well M-3A, measurements of TDS, chloride, nitrate as nitrogen, pH, and EC did

not exceed the respective concentration limits. The concentration limit was exceeded for sulfate

and turbidity.



At monitoring well M-4, measurements of TDS, chloride, sulfate, nitrate as nitrogen, pH, and EC

did not exceed the respective concentration limits. The concentration limit was exceeded for

turbidity.

At monitoring well M-5, measurements of TDS, sulfate, nitrate as nitrogen, pH, and EC did not

exceed the respective concentration limits. The concentration limit was exceeded for chloride and

turbidity.

6.0 SUMMARY

The following summarizes results of the First Semester 2012 monitoring events:

Groundwater flow direction and gradient were generally consistent with historical

observations. Groundwater flow was estimated to the southwest (S 51º W at

0.0046ft/ft [March 2012] and S 53º W at 0.0048 ft/ft [May 2012]).

Field and monitoring parameter measurements for groundwater samples collected

on 5 March 2012 from monitoring wells M-1A, M-1B, M-3A, M-4 and M-5 were

generally consistent with previous measurements. TDS concentrations in

monitoring well M-1B (570 mg/L) and M-5 (590 mg/L) exceeded the

recommended SMCL for drinking water of 500 mg/L. All chloride and sulfate

concentrations were below their respective SMCLs (250 mg/L for each) for

drinking water. All nitrate as nitrogen concentrations were below the drinking

water MCL of 10 mg/L. Sodium was recorded at an historical high for well M-1A

(38 mg/L).

No VOCs were detected at ERL during the First Semester 2012.

Surface water was not present on 5 March and 23 May 2012 at sampling locations

S-1 and S-2 following rainfall events.

Methane measurements from six of the passive landfill gas vents did not exceed 0.0

percent by volume during the 5 March 2012 sampling event. The exception was

that methane was detected on 5 March at landfill gas vent V-7 at a concentration of

4.4 percent by volume. Methane was detected on 23 May at landfill gas vents V-1,

V-2, V-4, V-5, V-6 and V-7 at a concentration of 0.1, 0.2, 1.3, 4.2, 11.6, and 2.2

percent by volume respectively.

Methane was not detected above the CalRecycle (formerly CIWMB) limit of 5

percent methane by volume at the four perimeter soil gas monitoring wells GW-1,

GW-2, GW-3, and GW-4 (in the shallow and deep probes) during the First

Semester 2012.

FIGURES

Figure 3. Groundwater Elevation MeasurementsEvans Road Landfill, Colusa County

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03

Jul-

03

Jan-

04

Jul-

04

Jan-

05

Jul-

05

Jan-

06

Jul-

06

Jan-

07

Jul-

07

Jan-

08

Jul-

08

Jan-

09

Jul-

09

Jan-

10

Jul-

10

Jan-

11

Jul-

11

Jan-

12

Gro

un

dw

ater

Ele

vati

on (

ft. a

msl

)

M-1

M-1A

M-1B

M-2

M-3

M-3A

M-4

M-5

TABLES

M-1 M-1A M-1B M-2 M-3 M-3A M-4 M-5231.77 210.56 199.32 194.12 192.85 182.15 185.59 190.07

2.40

DateMeasured M-1 M-1A M-1B M-2 M-3 M-3A M-4 M-527-Mar-95 82.55 79.08 83.90 85.3820-Jun-95 81.71 Dry 82.44 83.8927-Sep-95 Dry NA 78.89 78.5821-Dec-95 NA NA NA 81.353-May-96 NA NA NA 86.1628-Jul-96 84.27 82.32 NA 83.2114-Mar-97 88.09 86.13 NA 87.8129-May-97 88.58 83.41 NA 83.8517-Sep-97 88.78 81.31 NA 82.1718-Nov-97 88.09 81.62 NA 82.927-Apr-98 90.77 89.76 NA 92.0829-Jul-98 91.87 78.96 91.48 91.9928-Sep-98 90.52 74.80 90.14 91.1628-Dec-98 93.13 79.59 91.38 91.8621-Apr-99 94.75 82.29 92.80 93.1520-May-99 94.36 81.94 91.50 92.0525-Oct-99 94.25 77.76 86.81 87.4227-Apr-00 95.54 80.18 89.62 90.105-Feb-01 Dry 78.52 87.03 87.534-Jun-01 Dry 78.22 86.75 87.3822-Oct-01 Dry 74.40 83.98 84.588-May-02 Dry 76.77 86.29 86.8824-Feb-03 Well Abandoned 76.45 79.73 87.81 88.21 88.7119-May-03 77.22 79.56 87.77 88.12 88.7912-Aug-03 74.85 75.71 85.11 85.64 86.441-Oct-03 74.55 76.29 84.90 85.44 86.21

31-Mar-04 78.57 82.44 90.22 90.55 91.0925-May-04 77.84 79.78 88.72 89.16 89.9319-Aug-04 72.74 76.77 86.10 86.65 87.469-Nov-04 74.78 78.17 86.45 86.92 87.7330-Mar-05 78.62 83.92 91.69 92.00 92.6212-Jun-05 77.89 81.08 90.14 90.81 91.3628-Jul-05 78.64 80.83 89.60 90.15 90.206-Dec-05 78.81 82.36 89.04 89.56 90.4715-Mar-06 80.71 86.03 91.38 92.10 92.7425-May-06 82.77 87.10 94.78 95.22 95.5524-Aug-06 80.15 82.67 91.20 91.78 92.6725-Oct-06 79.74 83.27 90.43 91.02 91.8814-Mar-07 82.36 85.38 90.51 91.09 91.9910-May-07 80.70 82.80 88.68 89.42 90.417-Aug-07 76.55 78.30 84.34 85.19 86.3227-Oct-07 75.25 77.72 83.79 84.56 85.5119-Mar-08 77.41 81.69 86.88 87.57 88.3727-May-08 76.05 78.34 84.30 85.05 86.0720-Aug-08 71.88 73.92 80.28 81.13 82.2524-Oct-08 71.22 73.51 80.25 80.94 81.8921-Jan-09 72.52 75.81 81.50 82.10 82.976-Apr-09 73.04 75.65 81.33 81.91 82.7923-Jul-09 68.37 68.09 72.21 73.07 74.1927-Oct-09 66.55 67.59 72.31 72.94 73.86

Wells Abandoned

Groundwater Elevation (ft above MSL)

Table 1. HISTORICAL GROUNDWATER ELEVATION DATAMarch 1995 - May 2012

Evans Road Landfill Monitoring Report

TOC Elevation (ft above MSL)


Table 1 (Concluded)

DateMeasured M-1 M-1A M-1B M-2 M-3 M-3A M-4 M-524-Mar-10 68.28 72.28 76.85 77.37 77.9614-May-10 68.52 69.88 74.84 75.31 76.1014-Jul-10 66.58 65.80 70.53 Dry 71.1719-Oct-10 65.13 65.30 70.45 Dry 71.7929-Mar-11 66.65 69.23 75.85 76.33 76.643-Jun-11 67.57 68.72 75.58 75.98 76.64

18-Aug-11 65.92 65.80 71.50 72.09 72.9319-Oct-11 65.31 66.01 71.71 72.20 72.965-Mar-12 67.02 68.49 73.69 74.09 74.83

23-May-12 67.37 67.39 72.68 73.24 74.05

Groundwater Elevation (ft above MSL)


Table 2. GROUNDWATER FLOW DIRECTION AND GRADIENTMarch 2005 - May 2012Colusa County Landfill -- Evans Road, Monitoring Summary Repo

Date Measured Average Flow Direction Average Gradient (ft/ft)

30-Mar-05 S 47° W 0.006412-Jun-05 S 44° W 0.007228-Jul-05 S 41° W 0.00686-Dec-07 S 53° W 0.005715-Mar-06 N 83° W 0.017525-May-06 S 89° W 0.014824-Aug-06 S 51° W 0.005925-Oct-06 S 54° W 0.005014-Mar-07 S 61° W 0.002110-May-07 S 63° W 0.00427-Aug-07 S 64° W 0.004425-Oct-07 S 61° W 0.004319-Mar-08 S 62° W 0.003727-May-08 S 63° W 0.004320-Aug-08 S 55° W 0.006624-Oct-08 S 65° W 0.005521-Jan-09 S 67° W 0.00506-Apr-09 S 58° W 0.005223-Jul-09 S 68° W 0.003827-Oct-09 S 67° W 0.004324-Mar-10 S 52° W 0.003614-May-10 S 57° W 0.003914-Jul-10 S 41° W 0.003619-Oct-10 S 53° W 0.003729-Mar-11 S 45° W 0.00383-Jun-11 S 44° W 0.0060

18-Aug-11 S 52° W 0.005419-Oct-11 S 50° W 0.00525-Mar-12 S 51° W 0.0046

23-May-12 S 53° W 0.0048

NC - Not calculated


Table 3. GROUNDWATER FIELD PARAMETERSMarch 1997 - May 2012Evans Road Landfill Monitoring Report

Sample SampleDate M-1A M-1B M-3A M-4 M-5 Date M-1A M-1B M-3A M-4 M-5

Mar-97 7 Mar-97Sep-97 6.6 Sep-97Apr-98 6.9 Apr-98Jul-98 7.5 6.80 NA Jul-98Jan-99 7.6 7.20 6.8 Jan-99May-99 7.4 7.00 6.6 May-99Oct-99 7.5 6.80 6.7 Oct-99Apr-00 NA NA NA Apr-00May-00 7.3 7.10 NA May-00Feb-01 7.8 7.20 NA Feb-01Jun-01 7.6 7.00 NA Jun-01Oct-01 7.4 7.90 7.2 Oct-01May-02 7.40 6.90 6.7 May-02Feb-03 7.86 7.03 7.13 7.2 7.06 Feb-03May-03 7.17 7.56 6.86 6.82 6.86 May-03Aug-03 7.02 6.98 6.89 6.74 6.65 Aug-03Oct-03 NA 7.14 NA NA NA Oct-03Mar-04 7.46 7.11 7.16 6.73 7.11 Mar-04Aug-04 6.21 6.01 6.26 6.22 6.28 Aug-04Mar-05 7.67 6.95 7.35 6.79 6.72 Mar-05 21.0 21.1 20.0 18.7 20.8Jul-05 7.80 7.02 7.16 7.00 6.85 Jul-05 22.7 22.5 21.1 20.0 22.2

May-06 7.20 6.41 7.16 6.35 6.10 May-06 22.4 21.8 20.9 19.5 21.9Oct-06 7.95 7.38 7.47 7.49 7.24 Oct-06 22.5 21.9 20.6 19.4 21.7Mar-07 10.41 7.58 8.81 8.30 7.73 Mar-07 21.5 22.1 20.7 19.0 21.1Aug-07 7.34 6.62 6.42 6.43 6.37 Aug-07 22.6 23.8 21.0 19.6 21.9Mar-08 6.76 6.61 6.60 6.51 6.48 Mar-08 20.2 20.3 18.7 18.9 20.9Aug-08 7.38 6.89 7.30 7.17 6.88 Aug-08 22.7 22.9 20.4 19.4 21.5Jan-09 7.57 6.99 6.93 6.56 6.59 Jan-09 20.4 20.2 18.8 17.5 19.3Jul-09 7.84 7.56 7.67 NA 7.57 Jul-09 22.9 22.3 20.4 NA 21.5Mar-10 7.64 6.80 6.93 6.63 6.36 Mar-10 20.9 21.5 20.4 19.0 22.9Jul-10 8.47 7.65 7.55 NA 6.46 Jul-10 22.6 22.0 20.3 NA 22.0Mar-11 7.45 6.89 7.14 6.85 6.88 Mar-11 20.2 21.9 20.0 19.6 21.0Aug-11 6.65 7.18 6.87 NA 6.84 Aug-11 22.9 21.2 22.7 NA 22.3Mar-12 7.69 6.80 7.35 7.20 6.91 Mar-12 22.0 21.5 20.1 19.2 21.0

pH Temperature (oC)


Table 3 (concluded)


Mar-97 600 Mar-97 NASep-97 600 Sep-97 NAApr-98 322 Apr-98 NAJul-98 435 592 NA Jul-98 NA NA NAJan-99 486 507 364 Jan-99 467 1,343 187May-99 508 534 405 May-99 NA NA NAOct-99 462 619 403 Oct-99 1,010 298 202Apr-00 NA NA NA Apr-00 NA NA NAMay-00 460 537 NA May-00 NA NA NAFeb-01 374 560 NA Feb-01 NA NA NAJun-01 340 430 NA Jun-01 NA NA NAOct-01 801 645 496 Oct-01 NA NA NAMay-02 430 490 590 May-02 NA NA NAFeb-03 1,091 1,106 489 564 542 Feb-03 49 65 45 55 75May-03 435 1,163 374 469 374 May-03 NA NA NA NA NAAug-03 617 1,163 374 469 374 Aug-03 NA >200 128 114 120Oct-03 NA 1,379 NA NA NA Oct-03 NA 26 NA NA NAMar-04 481 1,103 581 604 943 Mar-04 22 17 22 16 9Aug-04 969 1,146 1,061 1,088 1,011 Aug-04 38 179 52 39 48Mar-05 413 1,150 422 566 1,380 Mar-05 22 20 12 21 70Jul-05 402 1,180 433 537 1,350 Jul-05 15 23 17 20 16

May-06 403 1,080 409 548 1,280 May-06 84 361 4 3 134Oct-06 478 1,077 522 648 1,480 Oct-06 33 272 80 12 159Mar-07 389 1,100 472 662 1,356 Mar-07 82 80 32 160 150Aug-07 433 1,182 656 658 1,308 Aug-07 5,000 480 570 19 15Jun-11 423 1,200 495 631 1,214 Aug-07 9 46 143 131 580Aug-08 475 1,020 751 669 1,208 Aug-08 1,300 300 33 18 270Jan-09 515 1,075 1,005 693 1,219 Jan-09 200 68 410 17 150Jul-09 512 989 888 NA 1,229 Jul-09 1,700 1,100 160 NA 1,600Mar-10 369 891 753 542 978 Mar-10 210 200 180 28 350Jul-10 425 1,039 1,088 NA 1,314 Jul-10 1,800 5 160 NA 650Mar-11 437 1,082 555 584 1,039 Mar-11 110 580 20 57 74Aug-11 314 868 764 NA 986 Aug-11 740 1,400 1,500 NA 2,400Mar-12 371 814 441 362 35 Mar-12 750 130 360 420 2,200

NA - Not analyzed (well possibly dry)

(1) - pH analyzed by laboratory

Turbidity (NTUs)Electrical Conductivity (mhos/cm)


Table 4. SEMI-ANNUAL GROUNDWATER MONITORING PARAMETERSMarch 1997 - May 2012


Sample Sample

Date M-1A M-1B M-3A M-4 M-5 Date M-1A M-1B M-3A M-4 M-5Mar-97 360 Mar-97 12Sep-97 330 Sep-97 12Apr-98 238 Apr-98 10Jul-98 242 372 NA Jul-98 22 19 NAJan-99 284 420 217 Jan-99 33 19 12May-99 358 470 266 May-99 37 19 12Oct-99 252 378 235 Oct-99 28 17 12Apr-00 NA NA NA Apr-00 NA NA NAMay-00 260 310 50 May-00 28 22.0 NAFeb-01 270 320 NA Feb-01 27 26 NAJun-01 240 320 NA Jun-01 22 16.0 NAOct-01 230 330 300 Oct-01 21 21.0 23May-02 260 290 350 May-02 21 15.0 24Feb-03 284 740 310 370 613 Feb-03 17 3 18.0 14 30May-03 NA NA NA NA NA May-03 NA NA NA NA NAAug-03 270 650 298 380 613 Aug-03 16 3.9 14 16 28Oct-03 NA NA NA NA NA Oct-03 NA NA NA NA NAMar-04 282 693 296 234 640 Mar-04 17 3.9 21 21 54Aug-04 284 650 286 352 717 Aug-04 18 5.8 16 19 75Mar-05 280 670 290 380 750 Mar-05 9.7 14 24 21 140Jul-05 270 1,200 300 360 750 Jul-05 27 5.2 14.0 18 110May-06 260 580 280 360 700 May-06 26 5.4 24 22 130Oct-06 320 660 320 390 840 Oct-06 36 7.1 24 21 140Mar-07 220 720 290 380 730 Mar-07 18 7.4 24 16 62Aug-07 330 700 420 390 700 Aug-07 22 3.6 19 24 120Mar-08 240 630 240 330 580 Mar-08 20 3.5 9.3 23 94Aug-08 280 580 580 400 700 Aug-08 18 2.3 10 27 79Jan-09 290 550 520 400 570 Jan-09 20 2.4 15 30 59Jul-09 290 520 500 NA 660 Jul-09 24 2.2 11 NA 38Mar-10 240 580 500 330 640 Mar-10 23 2.2 17 25 38Jul-10 260 510 560 NA 640 Jul-10 28 2.4 12 NA 38Mar-11 220 440 250 320 540 Mar-11 25 2.3 21 30 57Aug-11 280 440 510 NA 610 Aug-11 28 2.5 9 NA 42Mar-12 260 570 340 340 590 Mar-12 25 2.3 21 17 58

Total Dissolved Solids (mg/L) Chloride (mg/L)SMCL: 500 mg/L (recommended) SMCL: 250 mg/L (recommended)


Table 4 (continued)

Sample Sample

Date M-1A M-1B M-3A M-4 M-5 Date M-1A M-1B M-3A M-4 M-5Mar-97 18 Mar-97 0.19Sep-97 31 Sep-97 0.055Apr-98 24 Apr-98 <1Jul-98 27 12 NA Jul-98 2.22 0.81 NAJan-99 40 33 21 Jan-99 2.48 1.5 <0.226May-99 46 33 23 May-99 2.39 1.59 <0.226Oct-99 37 24 21 Oct-99 2.66 1.25 <0.226Apr-00 NA NA NA Apr-00 NA NA NAMay-00 39 35 NA May-00 2.8 1.8 NAFeb-01 35 38 NA Feb-01 2.9 1.9 NAJun-01 28 27.0 NA Jun-01 1.9 1.2 NAOct-01 29 30.0 30 Oct-01 2.7 1.5 0.053May-02 31 24 35 May-02 3 2.5 0.62Feb-03 27 2 34 28 19.0 Feb-03 2.92 0.45 1.97 0.43 <0.014May-03 NA NA NA NA NA May-03 NA NA NA NA NAAug-03 26 NA NA NA NA Aug-03 NA 1.10 128.20 113.94 <0.011Oct-03 NA NA NA NA NA Oct-03 NA NA NA NA NAMar-04 29 2.4 40 30 27 Mar-04 2.76 0.55 2.27 0.44 <0.016Aug-04 27 2.3 27 31 23 Aug-04 2.83 0.21 2.86 0.37 <0.018Mar-05 30 2.8 43 32 24 Mar-05 3.0 0.26 2.5 0.40 <0.20Jul-05 35 2.4 26 31 24 Jul-05 3.0 <0.20 2.7 0.7 <0.20May-06 31 2.5 46 35 25 May-06 2.9 <0.20 2.5 0.58 <0.20Oct-06 36 2.4 38 34 26 Oct-06 2.9 <0.20 2.5 0.72 <0.20Mar-07 19 2.8 43 27 26 Mar-07 1.6 <0.20 2.7 1.0 <0.20Aug-07 32 2.6 25 31 24 Aug-07 2.8 0.74 7.5 1.8 0.57Mar-08 29 2.5 16 30 32 Mar-08 3.0 <0.20 4.6 0.31 <0.20Aug-08 27 1.9 18 29 25 Aug-08 2.8 0.12 1.20 0.12 0.15Jan-09 30 2.1 24 30 25 Jan-09 3.0 0.11 (J) 1.0 0.11 (J) 0.12 (J)Jul-09 31 2.0 16 NA 22 Jul-09 2.6 0.12 (J) 1.0 NA 0.12 (J)Mar-10 33 1.9 25 29 43 Mar-10 2.7 0.15 (J) 1.2 0.24 0.26Jul-10 35 1.9 18 NA 24 Jul-10 2.6 0.13 (J) 0.98 NA 0.13 (J)Mar-11 32 1.9 34 31 26 Mar-11 2.6 0.12 (J) 2.40 0.16 0.11 (J)Aug-11 34 1.9 15 NA 28 Aug-11 2.5 0.16 (J) 1.40 NA 0.26Mar-12 33 1.9 39 25 26 Mar-12 2.6 0.16 (J) 2.60 1.00 0.13 (J)

MCL: 10 mg/L

Sulfate as SO4 (mg/L) Nitrate as N (mg/L)SMCL: 250 mg/L (recommended)


Table 4 (continued)


Feb-03 35 31 23 28 41 Feb-03 18 78 23 31 59May-03 NA NA NA NA NA May-03 NA NA NA NA NAAug-03 34 31 22 29 29 Aug-03 16 78 22 30 60Oct-03 NA NA NA NA NA Oct-03 NA NA NA NA NAMar-04 34 30 22 26 25 Mar-04 17 71 21 31 61Aug-04 34 31 21 25 26 Aug-04 17 76 23 31 72Mar-05 32 29 20 25 27 Mar-05 25 79 22 37 94Jul-05 31 29 20 25 27 Jul-05 21 78 24 32 84May-06 33 29 22 29 26 May-06 20 70 24 32 79Oct-06 34 28 23 29 30 Oct-06 26 68 35 32 95Mar-07 19 27 23 29 34 Mar-07 16 72 23 41 100Aug-07 34 30 29 25 24 Aug-07 260 85 41 35 81Mar-08 37 32 21 27 39 Mar-08 20 82 36 38 82Aug-08 34 29 27 27 30 Aug-08 62 74 44 40 88Jan-09 35 27 31 25 29 Jan-09 31 64 60 39 99Jul-09 33 28 28 NA 26 Jul-09 67 77 50 NA 85Mar-10 34 30 32 28 39 Mar-10 39 75 58 37 96Jul-10 35 27 32 NA 28 Jul-10 59 76 65 NA 96Mar-11 34 27 22 23 25 Mar-11 22 72 27 35 70Aug-11 33 25 24 NA 22 Aug-11 33 110 70 NA 120Mar-12 38 31 25 26 31 Mar-12 29 68 29 35 120

Magnesium (mg/L)Sodium (mg/L)


Table 4 (concluded)

Sample

Date M-1A M-1B M-3A M-4 M-5Feb-03 210 910 220 340 320May-03 NA NA NA NA NAAug-03 200 960 260 350 660Oct-03 NA NA NA NA NAMar-04 210 850 210 340 600Aug-04 210 970 230 330 670Mar-05 210 810 200 350 630Jul-05 180 320 240 320 660May-06 190 760 190 330 580Oct-06 210 750 240 360 660Mar-07 150 820 190 380 690Aug-07 200 870 420 380 680Mar-08 200 840 250 350 590Aug-08 230 740 470 360 650Jan-09 240 730 630 370 680Jul-09 210 620 550 NA 680Mar-10 180 750 610 370 700Jul-10 170 700 650 NA 740Mar-11 170 760 210 290 570Aug-11 160 670 560 NA 640

NA - Not analyzed (well possibly dry)

J - Detected but below the Reporting Limit; therefore, result is an estimated concentration, detected but not quantified (DNQ).

SMCL - Secondary Maximum Contaminant Level fro drinking water, State of California

MCL - Maximum Contaminant Level fro drinking water, State of California

Bicarbonate (mg/L)


Table 5. DETECTED VOLATILE ORGANIC COMPOUNDS - GROUNDWATERMarch 1997 - May 2012


Sample Location ID Date Sampled Analyte Results

Practical Quantitation Limit (O.C.)

Method Detection

LimitLab

Qualifiers UnitsM-1A 03/07/07 Acetone 5,200 J+ µg/L

02/24/03 Benzene 0.19 µg/L07/14/10 Chloromethane 0.80 0.50 0.45 µg/L03/29/11 Chloromethane 3.80 0.50 0.45 µg/L02/24/03 Dichlorodifluoromethane 0.13 2.4 µg/L08/12/03 Dichlorodifluoromethane 0.14 µg/L03/07/07 Methyl ethyl ketone 3,500 J+ µg/L05/19/03 Methylene chloride 3.7 µg/L10/22/01 Naphthalene 0.79 µg/L03/24/10 Naphthalene 5.0 0.50 0.20 µg/L02/24/03 Toluene 0.24 µg/L03/24/10 1,2,4-Trichlorobenzene 2.4 0.50 0.29 µg/L02/24/03 Total xylenes 0.40 µg/L

M-1B 03/07/07 Acetone 9.7 J+ µg/L02/24/03 Benzene 0.12 µg/L03/31/04 Benzene 0.10 µg/L07/14/10 Chloromethane 0.76 0.50 0.45 µg/L03/29/11 Chloromethane 0.91 0.50 0.45 µg/L02/24/03 Dichlorodifluoromethane 0.80 µg/L08/12/03 Dichlorodifluoromethane 0.55 µg/L10/01/03 Dichlorodifluoromethane 0.45 µg/L03/31/04 Dichlorodifluoromethane 0.58 µg/L08/19/04 Dichlorodifluoromethane 0.68 µg/L07/28/05 Dichlorodifluoromethane 0.67 µg/L02/24/03 1,1-Dichloroethane 0.85 µg/L08/12/03 1,1-Dichloroethane 0.64 µg/L10/01/03 1,1-Dichloroethane 0.65 µg/L03/31/04 1,1-Dichloroethane 0.49 µg/L08/19/04 1,1-Dichloroethane 1.0 µg/L03/30/05 1,1-Dichloroethane 0.83 µg/L07/28/05 1,1-Dichloroethane 1.1 µg/L05/06/06 1,1-Dichloroethane 0.67 µg/L03/07/07 1,1-Dichloroethane 0.56 µg/L08/07/07 1,1-Dichloroethane 0.69 µg/L08/20/08 1,1-Dichloroethane 0.65 0.50 0.43 µg/L01/21/09 1,1-Dichloroethane 0.65 0.50 0.43 µg/L07/23/09 1,1-Dichloroethane 0.63 0.50 0.43 µg/L03/24/10 1,1-Dichloroethane 0.55 0.50 0.43 µg/L02/24/03 Cis-1,2-Dichloroethene 0.18 µg/L08/12/03 Cis-1,2-Dichloroethene 0.14 µg/L03/31/04 Cis-1,2-Dichloroethene 0.85 µg/L08/19/04 Cis-1,2-Dichloroethene 1.1 µg/L03/30/05 Cis-1,2-Dichloroethene 0.69 µg/L07/28/05 Cis-1,2-Dichloroethene 0.90 µg/L05/06/06 Cis-1,2-Dichloroethene 0.62 µg/L03/07/07 Cis-1,2-Dichloroethene 0.82 µg/L08/07/07 Cis-1,2-Dichloroethene 0.62 µg/L07/28/05 Di-isopropyl ether 0.81 µg/L05/06/06 Di-isopropyl ether 0.52 µg/L


Table 5 (continued)


Practical Quantitation

Limit

Method Detection

LimitLab

Qualifiers Units(M-1B-Cont.) 03/07/07 Di-isopropyl ether 0.79 µg/L

08/07/07 Di-isopropyl ether 0.60 µg/L01/21/09 Di-isopropyl ether 0.35 0.50 0.25 J µg/L03/07/07 Methyl ethyl ketone 45 J+ µg/L03/07/07 Methyl tert-butyl ether 1.1 µg/L05/19/03 Methylene chloride 2.5 µg/L03/31/04 Methylene chloride 0.31 µg/L02/24/03 Tetrachloroethene 0.68 µg/L08/12/03 Tetrachloroethene 0.63 µg/L10/01/03 Tetrachloroethene 0.57 µg/L03/31/04 Tetrachloroethene 0.81 µg/L08/19/04 Tetrachloroethene 0.74 µg/L07/28/05 Tetrachloroethene 0.58 µg/L02/24/03 Toluene 0.29 µg/L02/24/03 Total xylenes 0.25 µg/L

02/24/03 Trichloroethene 0.49 µg/L08/12/03 Trichloroethene 0.39 µg/L10/01/03 Trichloroethene 0.42 µg/L03/31/04 Trichloroethene 0.42 µg/L08/19/04 Trichloroethene 0.68 µg/L07/28/05 Trichloroethene 0.58 µg/L

M-3A 03/07/07 Acetone 9.7 J+ µg/L03/29/11 Acetone 7.7 5.00 0.93 µg/L02/24/03 Benzene 6.0 µg/L01/21/09 Chloromethane 0.65 0.50 0.45 µg/L02/24/03 Ethylbenzene 0.66 µg/L03/07/07 Methyl ethyl ketone 5.3 J+ µg/L02/24/03 Methyl tert-butyl ether 0.19 µg/L02/24/03 Naphthalene 0.21 µg/L02/24/03 Tetrachloroethene 0.34 µg/L10/22/01 Toluene 0.55 µg/L02/24/03 Toluene 3.5 µg/L03/24/10 1,2,3-Trichlorobenzene 1.8 0.50 0.22 µg/L02/24/03 Total xylenes 5.6 µg/L

M-4 10/01/06 Acetone 5.3 µg/L03/29/11 Acetone 3.2 5.00 0.93 J µg/L02/24/03 Benzene 0.41 µg/L03/29/11 Chloromethane 2.70 0.50 0.45 µg/L02/24/03 Ethylbenzene 0.12 µg/L03/07/07 Methyl ethyl ketone 8.4 J+ µg/L02/24/03 Toluene 0.41 µg/L02/24/03 Total xylenes 0.86 µg/L


Table 5 (concluded)


Practical Quantitation

Limit

Method Detection

LimitLab

Qualifiers UnitsM-5 08/12/03 Acetone 3.3 µg/L

03/31/04 Acetone 12 µg/L03/07/07 Acetone 7.3 J+ µg/L07/14/10 Chloromethane 0.90 0.50 0.45 µg/L03/29/11 Chloromethane 4.40 0.50 0.45 µg/L02/24/03 Dichlorodifluoromethane 0.21 µg/L08/12/03 Dichlorodifluoromethane 0.19 µg/L07/28/05 Di-isopropyl ether 0.95 µg/L05/06/06 Di-isopropyl ether 0.51 µg/L10/01/06 Di-isopropyl ether 0.70 µg/L03/07/07 Di-isopropyl ether 0.76 µg/L08/07/07 Di-isopropyl ether 0.69 J µg/L08/20/08 Di-isopropyl ether 0.84 0.50 0.25 µg/L01/21/09 Di-isopropyl ether 0.91 0.50 0.25 µg/L07/23/09 Di-isopropyl ether 0.78 0.50 0.25 µg/L03/24/10 Di-isopropyl ether 0.63 0.50 0.25 µg/L07/14/10 Di-isopropyl ether 0.94 0.50 0.25 µg/L07/23/09 Ethanol 40 20 4.0 µg/L03/24/10 Ethanol 92 20 4.0 µg/L02/24/03 Ethylbenzene 0.10 µg/L03/07/07 Methyl ethyl ketone 6.9 J+ µg/L03/24/10 Methyl ethyl ketone 1.1 1.0 0.49 µg/L05/19/03 Methylene chloride 3.6 µg/L02/24/03 Toluene 0.32 µg/L02/24/03 Total xylenes 0.45 µg/L

O.C.-Observed Concentrations in Down-gradient and Cross-gradient Wells

g/L - micrograms per liter (parts per billion)

NA - not analyzed

J - Compound positively identified, results approximate

J+ = Results estimated with high bias.

Highlighted values are for the most recent monitoring period


Table 6. FIVE-YEAR CONSTITUENTS OF CONCERN -- GROUNDWATERMarch 1997 to March 2010Evans Road Landfill


Mar-97 NA Mar-97 NAJan-99 NA NA NA Jan-99 626 1,820 250Oct-99 NA NA NA 2.4 Oct-99 1,080 372 74Feb-03 NA 32 NA NA 13 Feb-03 NR NR NR NR NRAug-04 7.7 NA NA NA NA Mar-10 NR NR NR NR NRMar-05 NA NA <1.00 1.02 NAMar-08 NA 1.50 NA NA 1.77Jul-09 0.489(J) NA NA NA NAMar-10 NA NA 1.43 1.69 NA


Mar-97 NA Mar-97 NAJan-99 NA NA NA Jan-99 NA NA NAOct-99 NA NA NA Oct-99 NA NA NAFeb-03 NA ND NA NA ND Feb-03 NA ND NA NA ND

Aug-04

bis-(2-ethylhexyl) phthalate (2.8

g/L) NA NA NA NA Aug-04 ND NA NA NA NAMar-05 NA NA ND ND NA Mar-05 NA NA ND ND NAMar-08 NA ND NA NA ND Mar-08 NA ND NA NA ND

Jul-09 ND NA NA NA NA Jul-09 ND NA NA NA NA

Mar-10 NA NA


g/L)(J)


g/L)(J) NA Mar-10 NA NA ND ND NA

6/3/11 S 44° W 0.006Date M-1A M-1B M-3A M-4 M-5

Mar-97 NAJan-99 NA NA NAOct-99 NA NA NAFeb-03 NA ND NA NA NDAug-04 ND NA NA NA NAMar-05 NA NA ND ND NAMar-08 NA ND NA NA NDJul-09 ND NA NA NA NAMar-10 NA NA ND ND NA

NA - Not analyzed

ND - Not detected

NR - Not required

J - Indicates reported value as an estimated concentration above the MDL and below the method reporting limit.

Semi-volatile Organic Compounds (g/L) Organophosphorous Compounds (g/L)

Chlorophenoxy Herbicides (g/L)

Total Organic Carbon (mg/L) Total Suspended Solids (mg/L)


Table 7. 5-YEAR DISSOLVED INORGANICS -- GROUNDWATERFebruary 2003 to March 2010Evans Road Landfill Monitoring Report

Well NumberDate

SampledAl Sb

Observed Concentrati

ons inBa Be Cd Cr Co Cu Fe Pb

M-1A Aug-04 <12 <5.6 1.3 53 <0.17 <0.70 8.4 <2.7 <0.76 <1.6 0.053Jul-09 0.029(J) <0.020 0.0018(J) 0.063 <0.0010 <0.010 0.0075(J) <0.010 0.0094(J) 0.018(J) 0.0013(J)

M-1B Feb-03 <0.024 <0.00071 0.0015 0.59 2.4 0.0003 0.0023 0.0007 0.00048 0.031 <0.000049Mar-08 0.14 <0.020 <0.0020 0.94 <0.0010 <0.010 <0.010 <0.010 <0.020 0.25 <0.0050

M-3A Mar-05 <0.050 <0.020 <0.0020 0.087 <0.0010 <0.010 <0.010 <0.010 <0.020 <0.10 <0.0050Mar-10 0.041(J) <0.020 0.00082(J) 0.23 <0.0010 <0.010 0.0033(J) 0.0023(J) <0.020 0.032(J) <0.0050

M-4 Mar-05 <0.050 <0.020 <0.0020 0.010 <0.0010 <0.010 <0.010 <0.010 <0.020 <0.10 <0.0050Mar-10 <0.050 <0.020 <0.0020 0.20 <0.0010 <0.010 <0.010 <0.010 <0.020 0.015(J) <0.0050

M-5 Feb-03 0.045 <0.00071 0.0076 0.43 <0.00026 0.0003 0.0018 0.0032 0.00081 0.05 <0.000049Mar-08 0.069 <0.020 0.0029 0.28 <0.0010 <0.010 <0.010 <0.010 <0.020 <0.10 <0.0050

Well Number i Mn Hg Ni Se Ag Tl Sn V Zn Cyanide Sulfide

M-1A Aug-04 <0.44 <0.050 <0.25 <0.34 <0.96 0.15 <0.085 13 3.2 <0.0063 <0.50Jul-09 <0.020 <0.0010 <0.010 0.00080(J) <0.010 <0.20 <0.050 0.0060(J) 0.0072(J) <0.020 1.0

M-1B Feb-03 0.054 <0.000035 0.0013 <0.00066 <0.00057 0.00032 <0.000054 0.035 0.058 <0.0063 <1.3Mar-08 0.053 <0.0010 <0.010 <0.0050 <0.010 <0.20 <0.050 <0.020 <0.020 <0.020 <0.010

M-3A Mar-05 <0.020 <0.0010 <0.010 <0.0050 <0.010 <0.20 <0.050 <0.020 <0.020 <0.0206/3/11 S 44° W 0.006 <0.0010 <0.010 <0.0050 <0.010 0.0084(J) <0.050 <0.020 0.0058(J) <0.020 0.50

M-4 Mar-05 0.020 <0.0010 <0.010 <0.0050 <0.010 <0.20 <0.050 <0.020 <0.020 <0.020Mar-10 0.017(J) <0.0010 <0.010 <0.0050 <0.010 <0.20 <0.050 <0.020 0.010(J) <0.020 0.30

M-5 Feb-03 1.4 <0.000035 0.0075 <0.00066 <0.00057 0.00014 <0.000054 0.03 0.094 <0.0063 <0.50Mar-08 1.5 <0.0010 <0.010 <0.0050 <0.010 <0.20 <0.050 <0.020 <0.020 <0.020 <0.010

Concentrations are in milligrams per liter (parts per million)

< - no contaminant concentrations detected above the method reporting limt

Bold values indicate analyte detections above the method detection limit


NA - Not Analyzed


Table 8. WATER QUALITY PARAMETERS - SURFACE WATER February 2005 - May 2012Evans Road Landfill Monitoring Report

Total Down-grad TotalDissolved Nitrate as Oil and Organic VOCs

Sample Date Bicarbonate Solids Chloride Sulfate Nitrogen Grease Carbon Magnesium Sodium (EPA 8260B)ID Sampled (mg/L) (mg/L) (mg/L) (mg/L) (mg/L) (mg/L) (mg/L) (mg/L) (mg/L) (g/L)

S-1 Feb-05 67 200 2.1 4.0 2.4 <5.0 25.5 7.5 4.3 NDJan-08 24 380 0.88 1.0 0.47 <5.0 NA NA NA NDFeb-09 26 39 0.61 0.74 0.18 6.4 NA 10 2.2 acetone (6.0 µg/L)

Jan-10 27 47 1.8 0.88 0.17 (J) 2.6 (J) NA 5.8 2.6 NDJan-11 44 65 2.2 1.50 0.33 <5.0 NA 7.2 3.6 NDMar-11 85 89 1.6 1.10 0.18 (J) NA 6.64 9.5 4 acetone (4.3 µg/L)

S-2 Feb-05 67 200 3.1 8.8 1.3 <5.0 26.5 9.5 7.0 NDJan-08 16 150 2.4 7.9 6.2 <5.0 NA NA NA acetone (6.2 µg/L)

Feb-09 29 60 1.1 2.4 2.2 5.1 NA 8.4 2.3 acetone (4.2 µg/L)

Jan-10 30 86 2.7 4.7 2.0 1.8 (J) NA 6.0 3.2 NDJan-11 45 90 2.6 4.3 1.9 <5.0 NA 6.3 3.0 NDMar-11 55 110 2 3.1 0.5 NA 10.8 5.8 3.1 acetone (2.7 µg/L)

Organo-Total Chlorophenoxy phosphorous

Specific Suspended Herbicides Compounds SVOCs Approx.Sample Date pH Temperature Conductance Turbidity Solids (EPA 8151) (EPA 8141) (EPA 8270) Flow Total Iron

ID Sampled (pH units) (oC) (mhos/cm) (NTU) (mg/L) (g/L) (g/L) (g/L) Cubic ft/sec (mg/L)

S-1 Feb-05 NA NA NA 50 NA NR NR NR NA NAJan-08 6.5 NA 51 260 150 ND ND ND NA NAFeb-09 0.006 NA 48 400 150 NR NR NR NA NAJan-10 7.89 8.59 54 130 70 NR NR NR 0.75 NAJan-11 7.83 8.19 88 68 18 NR NR NR 0.40 NAMar-11 7.19 14.23 111 40 11 NR NR NR 0.10 2.8

S-2 Feb-05 NA NA NA 45 NA NR NR NR NA NAJan-08 6.9 NA 130 150 100 ND ND ND NA NAFeb-09 6.41 NA 80 290 16 NR NR NR NA NAJan-10 7.67 8.20 84 120 46 NR NR NR 1.5 NAJan-11 7.89 8.41 91 71 24 NR NR NR 0.30 NAMar-11 7.09 14.62 104 110 24 NR NR NR 0.25 6.7


ND - not detected

NA - not analyzed

NR - not required


Table 9. 5-YEAR DISSOLVED INORGANICS - SURFACE WATERJanuary 2008Evans Road Landfill Monitoring Report

Sample ID

Date Sampled

Al SbObserved

Concentrations in

Ba Be Cd Cr Co Cu Fe Pb

S-1 23-Jan-08 2.5 <0.020 <0.0020 0.030 <0.010 <0.010 <0.050 <0.020 <0.10 2.5 <0.0050

S-2 23-Jan-08 1.4 <0.020 <0.0020 0.054 2.40 <0.010 <0.050 <0.020 <0.10 1.4 <0.0050

Sample ID

Date Sampled

Mn Hg Ni Se Ag Tl Sn V Zn Cyanide Sulfide

S-1 23-Jan-08 <0.050 <0.0010 <0.10 <0.0050 <0.050 <0.40 <0.50 <0.50 <0.10 <0.020 <0.10

S-2 23-Jan-08 <0.050 <0.0010 <0.10 <0.0050 <0.050 <0.40 <0.50 <0.50 <0.10 <0.020 <0.10

Concentrations are in milligrams per liter (parts per million)

< - no contaminant concentrations detected above the method reporting limt

Bold values indicate analyte detections


Table 10. Gas Vent ResultsMarch 1997 - May 2012Evans Road Landfill Monitoring Report

CarbonWell Sample Methane (CH4) Dioxide (CO2)

Number Date (% volume) (% volume) (% volume)

V-1 14-Mar-07 0.0 0.9 19.610-May-07 0.0 0.3 20.47-Aug-07 0.6 1.4 18.627-Oct-07 0.0 1.0 18.919-Mar-08 1.5 2.8 17.727-May-08 0.3 1.0 18.820-Aug-08 0.0 0.0 19.724-Oct-08 0.6 1.4 18.221-Jan-09 0.5 1.2 19.36-Apr-09 0.0 0.0 20.123-Jul-09 0.7 2.1 6.827-Oct-09 0.0 0.2 20.524-Mar-10 0.0 0.2 19.614-May-10 0.0 1.5 18.314-Jul-10 0.0 0.7 20.119-Oct-10 0.2 1.7 19.329-Mar-11 0.0 0.1 19.312-May-11 0.0 0.0 20.118-Aug-11 0.0 0.0 19.619-Oct-11 0.0 0.3 19.25-Mar-12 0.0 0.0 18.5

23-May-12 0.1 0.2 18.3


23-May-12 0.2 0.3 18.0


Table 10 (continued)Carbon

Well Sample Methane (CH4) Dioxide (CO2) Oxygen (O2)Number Date (% volume) (% volume) (% volume)


23-May-12 0.0 0.0 18.5


23-May-12 1.3 1.2 17.1


Table 10 (continued)Carbon



23-May-12 4.2 3.1 15.3


23-May-12 11.6 10.0 9.4


Table 10 (concluded)Carbon



23-May-12 2.2 1.8 16.9


Table 11. SOIL GAS MONITORING POINTSAugust 2004 - May 2012

Evans Road Landfill Monitoring ReportCarbon Barometric

Sampling Date Methane (CH4) Dioxide (CO2) PressurePoint Sampled (% volume) (% volume) (% volume) (inches Hg)

GW-1S Aug-04 0.1 6.1 NMNov-04 0.0 2.4 NMMar-05 0.1 7.3 NMJun-05 0.0 4.8 NMJul-05 0.4 6.1 NMDec-05 0.0 2.4 18.3Mar-06 0.0 4.8 12.9May-06 0.0 11.6 5.7Aug-06 0.0 7.6 15.9Oct-06 0.0 4.3 18.5Mar-07 0.0 2.5 18.2May-07 0.0 2.6 19.4Aug-07 0.0 0.4 20.1Oct-07 0.0 2.4 19.3Mar-08 0.0 1.9 17.4May-08 0.0 3.0 18.6Aug-08 0.0 3.4 18.3Oct-08 0.0 2.1 19.0Jan-09 0.0 1.6 19.5Apr-09 0.0 1.4 18.6Jul-09 0.0 2.8 17.5Oct-09 0.0 2.6 18.6Mar-10 0.0 1.4 18.2May-10 0.0 1.3 19.3Jul-10 0.0 2.6 17.8Oct-10 0.0 1.7 19.3 29.69Mar-11 0.0 1.1 18.3 29.93May-11 0.0 2.9 14.0 29.84Aug-11 0.0 4.1 15.6 29.63Oct-11 0.0 1.9 18.7 29.73Mar-12 0.0 1.4 17.3 29.78May-12 0.0 1.8 17.2 29.69

GW-1D Aug-04 0.1 11.3 NMNov-04 0.0 3.7 NMMar-05 0.0 12.4 NMJun-05 0.0 8.9 NMJul-05 0.1 14.0 NMDec-05 0.0 13.2 10.8Mar-06 0.0 8 13.8May-06 0.0 8.9 12.5Aug-06 0.0 6.8 13.5Oct-06 0.0 7.4 15.4Mar-07 0.0 2.5 18.1May-07 0.0 1.2 19.9Aug-07 0.0 3.1 19.1Oct-07 0.0 0.3 20.3


Table 11 (continued)

Carbon BarometricSampling Date Methane (CH4) Dioxide (CO2) Oxygen (O2) Pressure

Point Sampled (% volume) (% volume) (% volume) (inches Hg)(GW-1D-Cont.) Mar-08 0.0 0.6 20.0

May-08 0.0 0.4 20.6Aug-08 0.0 0.5 20.0Oct-08 0.0 0.6 19.8Jan-09 0.0 1.7 19.9Apr-09 0.0 1.0 19.2Jul-09 0.0 2.5 17.5Oct-09 0.0 0.4 20.2Mar-10 0.0 0.0 20.0May-10 0.0 0.3 19.8Jul-10 0.0 0.9 18.9Oct-10 0.0 1.3 19.3 29.69Mar-11 0.0 0.1 19.7 29.93Aug-11 0.0 1.6 17.7 29.63Oct-11 0.0 0.6 19.3 29.73Mar-12 0.0 1.0 18.1 29.78May-12 0.0 1.7 16.9 29.69

GW-2S Aug-04 0.2 12.5 NMNov-04 0.0 14.5 NMMar-05 0.1 15.8 NMJun-05 0.4 17.1 NMJul-05 0.3 12.1 NMDec-05 0.0 12.2 7.1Mar-06 0.0 0.2 20.3May-06 0.8 21.4 0.0Aug-06 0.0 9.0 7.3Oct-06 0.0 18.9 6.7Mar-07 0.0 12.0 6.5May-07 0.0 3.7 17.1Aug-07 0.0 4.5 14.3Oct-07 0.0 7.8 13.3Mar-08 0.0 15.8 1.6May-08 0.0 11.8 10.5Aug-08 0.0 14.0 6.8Oct-08 0.0 11.5 9.8Jan-09 0.0 8.6 12.7Apr-09 0.0 11.2 10.6Jul-09 0.0 4.8 14.8Oct-09 0.0 11.4 9.6Mar-10 0.0 7.9 13.2May-10 0.0 4.9 14.0Jul-10 0.0 4.0 16.6Oct-10 0.0 2.5 18.5 29.69Mar-11 0.0 0.0 20.1 29.93May-11 0.0 10.4 11.3 29.84Aug-11 0.0 13.7 6.6 29.63Oct-11 0.0 2.8 17.4 29.73Mar-12 0.0 9.3 7.0 29.78May-12 0.0 8.5 12.2 29.69




Point Sampled (% volume) (% volume) (% volume) (inches Hg)GW-2D Aug-04 0.2 2.6 NM

Nov-04 0.0 0.0 NMMar-05 30.5 31.2 NMJun-05 11.2 27.7 NMJul-05 29.1 30.4 NMDec-05 6.3 23.6 0.0Mar-06 6.3 23.6 0.0May-06 7.8 26.7 0.0Aug-06 0.0 0.2 19.6Oct-06 0.0 0.0 20.2Mar-07 8.4 32.5 0.0May-07 0.2 0.3 20.3Aug-07 0.0 0.0 20.4Oct-07 0.0 0.1 20.9Mar-08 1.7 19.0 3.0May-08 0.0 0.1 20.4Aug-08 11.1 29.7 0.1Oct-08 0.0 0.1 20.1Jan-09 1.6 25.5 1.2Apr-09 0.0 7.3 11.4Jul-09 0.0 0.1 19.5Oct-09 0.0 1.0 19.7Mar-10 0.0 9.3 19.3May-10 0.0 0.0 19.9Jul-10 0.0 0.0 19.6Oct-10 0.0 3.8 16.6 29.69Mar-11 0.0 0.0 20.0 29.93May-11 0.0 0.0 19.8 29.84Aug-11 0.0 13.7 5.2 29.63Oct-11 0.0 0.1 20.0 29.73Mar-12 0.0 0.8 17.5 29.78May-12 0.0 0.3 18.4 29.69

GW-3S Aug-04 0.2 3.5 NMNov-04 0.0 1.1 NMMar-05 38.9 7.3 NMJun-05 19.4 8.1 NMJul-05 9.8 16.8 NMDec-05 0.0 1.0 19.7Mar-06 11.4 6.4 0.0May-06 31.6 11.4 0.0Aug-06 0.0 7.8 13.9Oct-06 0.0 1.3 19.6Mar-07 0.0 0.9 19.1May-07 0.0 2.0 17.7Aug-07 0.0 3.3 16.8Oct-07 0.0 0.7 20.1Mar-08 0.0 2.0 15.4May-08 0.0 3.2 14.0Aug-08 0.0 2.0 18.1




Point Sampled (% volume) (% volume) (% volume) (inches Hg)(GW-3S-Cont.) Oct-08 0.0 0.6 19.4

Jan-09 0.0 0.8 19.8Apr-09 0.0 1.4 17.8Jul-09 0.0 1.8 18.5Oct-09 0.0 1.3 19.1Mar-10 0.0 1.3 16.3May-10 0.0 1.5 14.9Jul-10 0.0 2.9 16.8Oct-10 0.0 1.3 19.2 29.69Mar-11 0.0 1.2 14.9 29.93May-11 0.0 1.6 12.6 29.84Aug-11 0.0 2.3 17.5 29.63Oct-11 0.0 2.8 13.9 29.73Mar-12 0.0 0.9 18.0 29.78May-12 0.0 2.3 16.4 29.69

GW-3D Aug-04 28.2 25.2 NMNov-04 15.1 29.7 NMMar-05 41.3 9.3 NMJun-05 17.8 5.2 NMJul-05 16.1 13.9 NMDec-05 14.1 27.0 0.0Mar-06 47.5 42.6 0.0May-06 46.3 44.7 0.0Aug-06 0.0 25.3 3.5Oct-06 0.0 21.4 9.3Mar-07 0.0 10.0 12.5May-07 4.6 22.1 0.0Aug-07 3.0 20.2 0.8Oct-07 1.4 18.8 1.2Mar-08 0.0 6.1 10.0May-08 0.0 4.4 12.0Aug-08 0.0 8.9 4.2Oct-08 0.0 11.1 1.9Jan-09 0.0 10.8 2.5Apr-09 0.0 9.8 2.5Jul-09 0.0 8.2 5.3Oct-09 0.0 0.0 20.4Mar-10 0.0 2.2 16.0May-10 0.0 2.3 14.7Jul-10 0.0 2.7 15.8Oct-10 0.0 0.6 19.3 29.69Mar-11 0.0 2.2 12.5 29.93May-11 0.0 2.0 11.9 29.84Aug-11 0.2 2.0 13.9 29.63Oct-11 0.0 1.5 19.0 29.73Mar-12 0.0 2.1 15.8 29.78May-12 0.0 1.1 17.9 29.69

GW-4S Aug-04 5.2 27.9 NM


Table 11 (concluded)


Point Sampled (% volume) (% volume) (% volume) (inches Hg)(GW-4S-Cont.) Nov-04 13.5 34.8 NM

Mar-05 4.5 13.0 NMJun-05 4.8 11.2 NMJul-05 16.9 24.9 NMDec-05 23.1 36.7 0.1Mar-06 47.5 42.6 0.0May-06 46.3 44.7 0.0Aug-06 0.0 25.3 3.5Oct-06 0.0 21.4 9.3Mar-07 0.0 10.0 12.5May-07 4.6 22.1 0.0Aug-08 0.0 5.0 16.4Oct-08 0.0 2.1 18.1Jan-09 0.0 1.4 19.5Apr-09 0.0 1.6 14.5Jul-09 0.0 1.9 17.9Oct-09 0.0 1.0 19.9Mar-10 0.0 1.5 18.3May-10 0.0 2.5 19.6Jul-10 0.0 8.2 17.6Oct-10 0.0 1.4 19.4 29.69Mar-11 0.0 0.0 19.5 29.93May-11 0.0 0.0 20.1 29.84Aug-11 0.0 2.8 18.0 29.63Oct-11 0.0 1.3 19.2 29.73Mar-12 0.0 0.6 17.1 29.78May-12 0.0 1.2 17.1 29.69

GW-4D Aug-04 17.6 33.3 NMNov-04 0.0 24.8 NMMar-05 5.7 14.5 NMJun-05 7.9 15.3 NMJul-05 27.0 36.9 NMDec-05 26.2 37.4 0.0Mar-06 41.5 43.2 0.0May-06 48.4 42.5 0.0Aug-06 7.4 36.3 0.0Oct-06 18.4 38.6 0.0Mar-07 2.9 21.5 4.7May-07 22.3 29.8 0.0Aug-07 0.0 12.8 9.2Oct-07 0.0 8.5 11.8Mar-08 30.6 27.9 0.6May-08 18.4 32.3 0.3Aug-08 0.0 1.9 17.4Oct-08 0.0 0.2 19.4Jan-09 0.0 11.7 8.2Apr-09 0.0 7.0 7.8Jul-09 0.0 0.1 19.0Oct-09 0.0 0.0 20.3


Table 11 (concluded)


Point Sampled (% volume) (% volume) (% volume) (inches Hg)(GW-4D-Cont.) Mar-10 0.0 0.3 19.9

May-10 0.0 0.0 21.1Jul-10 0.0 1.2 18.9Oct-10 0.0 0.1 20.0 29.69Mar-11 0.0 0.0 19.6 29.93May-11 0.0 0.0 20.1 29.84Aug-11 0.0 13.3 10.2 29.63Oct-11 0.0 0.1 20.0 29.73Mar-12 0.0 0.5 17.4 29.78May-12 0.0 0.3 17.5 29.69

CalRecycle (formerly CIWMB) limit 5%.

NM - Not measured


Table 12. VOLATILE ORGANIC COMPOUNDS -- SOIL GAS August 2004


Sample Designation GW-2S GW-3S GW-3D GW-4S GW-4S(Dup) GW-4DSampling Date 08/19/04 08/19/04 08/19/04 08/19/04 08/19/04 08/19/04 08/19/04

Modified TO-15 GC/MS Full Scan

Freon 12 71 2.7 6.2 2.4 38 35 110Freon 114 29 1.6 2.8 46 20 19 60Vinyl Chloride ND 0.81 ND 13 9.7 9.3 72Chloroethane ND ND ND 13 ND ND 21Freon 11 2.0 ND ND ND ND ND NDEthanol ND 3.7 2.7 74 ND ND 921,1-Dichloroethene ND ND ND ND ND 0.99 5.4Acetone 18 32 27 52 57 61 772-Propanol 30 31 36 32 32 34 44Carbon Disulfide 9.7 11 15 100 13 14 30trans-1,2-Dichloroethene ND ND ND ND 5.1 5.4 18Hexane 1.1 2.0 2.5 72 26 27 1601,1-Dichloroethane ND ND ND 2.6 2.8 2.9 7.12-Butanone (Methyl Ethyl Ketone) 1.3 2.1 1.6 2.4 ND 290 NDcis-1,2-Dichloroethene 3.9 5.6 ND 3.5 280 ND 760Chloroform 27 ND 1.8 ND ND ND NDCyclohexane 2.3 1.9 2.6 98 20 21 832,2,4-Trimethylpentane 0.79 1.8 2.5 100 22 23 120Benzene 1.8 2.1 1.0 3.3 7.0 7.2 30Heptane 0.64 1.0 ND ND 17 18 120Trichloroethene 1.0 0.70 ND 3.8 49 52 74Bromodichloromethane 0.72 ND ND ND ND ND ND

# S 44 0.006 2.0 2.4 2.2 3.7 3.0 3.1 4.5Tetrachloroethene 4.0 1.1 16 19 60 63 50Ethyl Benzene 0.52 0.59 0.55 ND ND 0.87 NDm,p-Xylene 2.3 2.8 2.7 3.9 5.4 5.9 5.2o-Xylene 0.94 1.1 1.1 ND 1.6 1.6 NDStyrene 0.87 1.1 1.0 ND 1.3 1.4 NDCumene ND ND ND ND 6.7 7.3 144-Ethyltoluene 1.1 1.3 1.2 ND 1.6 1.8 ND1,3,5-Trimethylbenzene ND ND ND ND ND 0.74 ND1,2,4-Trimethylbenzene 1.2 1.4 1.3 ND 1.9 1.8 ND

Notes:

ND = Not Detected.

Lab Blank = All ND


March 1997 - Mar. 2012

Monitored ParameterConcentration

Limit M-1A M-1B M-3A M-4 M-5

TDS (mg/L) 641 260 570 340 340 590Chloride (mg/L) 33 25 2 21 17 58Sulfate (mg/L) 39 33 2 39 25 26Nitrate as Nitrogen (mg/L) 5.6 2.6 0.16 (J) 2.6 1.0 0.13 (J)pH 7.59 7.69 6.80 7.35 7.20 6.91EC (mhos/cm) 854 371 814 441 362 35Turbidity (NTU) 298 750 130 360 420 2200J - Detected but below the Reporting Limit; therefore, result is an estimated concentration, detected but not quantified (DNQ).

Bold values indicate observations which exceed the concentration limit.

Concentration Limits calculated with parameter data sets from M-4.

Table 13. TOLERANCE INTERVAL ANALYSIS

Evans Road Landfill Summary Report

Observed Concentrations in Down-gradient and Cross-gradient Wells


APPENDIX A

GRAPHICAL SUMMARIES OF GROUNDWATER MONITORING PARAMETERS

SELECTED PARAMETERS, MONITORING WELL M-1AEVANS ROAD LANDFILL


0

20

40

60

80

100

120

140Ju

l-98

Oct

-98

Jan-

99A

pr-9

9Ju

l-99

Oct

-99

Jan-

00A

pr-0

0Ju

l-00

Oct

-00

Jan-

01A

pr-0

1Ju

l-01

Oct

-01

Jan-

02A

pr-0

2Ju

l-02

Oct

-02

Jan-

03A

pr-0

3Ju

l-03

Oct

-03

Jan-

04A

pr-0

4Ju

l-04

Oct

-04

Jan-

05A

pr-0

5Ju

l-05

Oct

-05

Jan-

06A

pr-0

6Ju

l-06

Oct

-06

Jan-

07A

pr-0

7Ju

l-07

Oct

-07

Jan-

08A

pr-0

8Ju

l-08

Oct

-08

Jan-

09A

pr-0

9Ju

l-09

Oct

-09

Jan-

10A

pr-1

0Ju

l-10

Oct

-10

Jan-

11A

pr-1

1Ju

l-11

Oct

-11

Jan-

12A

pr-1

2

Ch

lori

de,

Nit

rate

as

N, a

nd

Su

lfat

e (m

g/L

)

0

200

400

600

800

1000

1200

1400

TD

S (

mg

/L)

and

Ele

ctri

cal C

on

du

ctiv

ity

( m

ho

s/cm

)

Chloride Nitrate as Nitrogen Sulfate Total Dissolved Solids Electrical Conductivity



0

100

200

300

400

500

600

700

800

900

1000

Feb

-03

Apr

-03

Jun-

03A

ug-0

3O

ct-0

3D

ec-0

3F

eb-0

4A

pr-0

4Ju

n-04

Aug

-04

Oct

-04

Dec

-04

Feb

-05

Apr

-05

Jun-

05A

ug-0

5O

ct-0

5D

ec-0

5F

eb-0

6A

pr-0

6Ju

n-06

Aug

-06

Oct

-06

Dec

-06

Feb

-07

Apr

-07

Jun-

07A

ug-0

7O

ct-0

7D

ec-0

7F

eb-0

8A

pr-0

8Ju

n-08

Aug

-08

Oct

-08

Dec

-08

Feb

-09

Apr

-09

Jun-

09A

ug-0

9O

ct-0

9D

ec-0

9F

eb-1

0A

pr-1

0Ju

n-10

Aug

-10

Oct

-10

Dec

-10

Feb

-11

Apr

-11

Jun-

11A

ug-1

1O

ct-1

1D

ec-1

1F

eb-1

2A

pr-1

2

Bic

arb

on

ate

(mg

/L)

0

50

100

150

200

250

So

diu

m a

nd

Mag

nes

ium

(m

g/L

)

Bicarbonate Sodium Magnesium

SELECTED PARAMETERS, MONITORING WELL M-1BEVANS ROAD LANDFILL


0

20

40

60

80

100

120

140Ju

n-03

Sep

-03

Dec

-03

Mar

-04

Jun-

04

Sep

-04

Dec

-04

Mar

-05

Jun-

05

Sep

-05

Dec

-05

Mar

-06

Jun-

06

Sep

-06

Dec

-06

Mar

-07

Jun-

07

Sep

-07

Dec

-07

Mar

-08

Jun-

08

Sep

-08

Dec

-08

Mar

-09

Jun-

09

Sep

-09

Dec

-09

Mar

-10

Jun-

10

Sep

-10

Dec

-10

Mar

-11

Jun-

11

Sep

-11

Dec

-11

Mar

-12

Ch

lori

de,

Nit

rate

as

N,

and

Su

lfat

e (m

g/L

)

0

200

400

600

800

1000

1200

1400

TD

S (

mg

/L)

and

Ele

ctri

cal

Co

nd

uct

ivit

y (m

mh

os/

cm)


SELECTED PARAMETERS, MONITORING WELL M-1BEVANS ROAD LANDFILL


0

100

200

300

400

500

600

700

800

900

1000

Feb

-03

May

-03

Aug

-03

Nov

-03

Feb

-04

May

-04

Aug

-04

Nov

-04

Feb

-05

May

-05

Aug

-05

Nov

-05

Feb

-06

May

-06

Aug

-06

Nov

-06

Feb

-07

May

-07

Aug

-07

Nov

-07

Feb

-08

May

-08

Aug

-08

Nov

-08

Feb

-09

May

-09

Aug

-09

Nov

-09

Feb

-10

May

-10

Aug

-10

Nov

-10

Feb

-11

May

-11

Aug

-11

Nov

-11

Feb

-12

Bic

arb

on

ate

(mg

/L)

0

50

100

150

200

250

So

diu

m a

nd

Mag

nes

ium

(m

g/L

)




0

20

40

60

80

100

120

140Ju

l-98

Oct

-98

Jan-

99A

pr-9

9Ju

l-99

Oct

-99

Jan-

00A

pr-0

0Ju

l-00

Oct

-00

Jan-

01A

pr-0

1Ju

l-01

Oct

-01

Jan-

02A

pr-0

2Ju

l-02

Oct

-02

Jan-

03A

pr-0

3Ju

l-03

Oct

-03

Jan-

04A

pr-0

4Ju

l-04

Oct

-04

Jan-

05A

pr-0

5Ju

l-05

Oct

-05

Jan-

06A

pr-0

6Ju

l-06

Oct

-06

Jan-

07A

pr-0

7Ju

l-07

Oct

-07

Jan-

08A

pr-0

8Ju

l-08

Oct

-08

Jan-

09A

pr-0

9Ju

l-09

Oct

-09

Jan-

10A

pr-1

0Ju

l-10

Oct

-10

Jan-

11A

pr-1

1Ju

l-11

Oct

-11

Jan-

12A

pr-1

2

Ch

lori

de,

Nit

rate

as

N, a

nd

Su

lfat

e (m

g/L

)

0

200

400

600

800

1000

1200

1400

TD

S (

mg

/L)

and

Ele

ctri

cal C

on

du

ctiv

ity

(mm

ho

s/cm

)




0

100

200

300

400

500

600

700

800

900

1000Ja

n-03

Apr

-03

Jul-0

3

Oct

-03

Jan-

04

Apr

-04

Jul-0

4

Oct

-04

Jan-

05

Apr

-05

Jul-0

5

Oct

-05

Jan-

06

Apr

-06

Jul-0

6

Oct

-06

Jan-

07

Apr

-07

Jul-0

7

Oct

-07

Jan-

08

Apr

-08

Jul-0

8

Oct

-08

Jan-

09

Apr

-09

Jul-0

9

Oct

-09

Jan-

10

Apr

-10

Jul-1

0

Oct

-10

Jan-

11

Apr

-11

Jul-1

1

Oct

-11

Jan-

12

Apr

-12

Bic

arb

on

ate

(mg

/L)

0

50

100

150

200

250

So

diu

m a

nd

Mag

nes

ium

(m

g/L

)


SELECTED PARAMETERS, MONITORING WELL M-4EVANS ROAD LANDFILL


0

20

40

60

80

100

120

140Ju

l-98

Oct

-98

Jan-

99A

pr-9

9Ju

l-99

Oct

-99

Jan-

00A

pr-0

0Ju

l-00

Oct

-00

Jan-

01A

pr-0

1Ju

l-01

Oct

-01

Jan-

02A

pr-0

2Ju

l-02

Oct

-02

Jan-

03A

pr-0

3Ju

l-03

Oct

-03

Jan-

04A

pr-0

4Ju

l-04

Oct

-04

Jan-

05A

pr-0

5Ju

l-05

Oct

-05

Jan-

06A

pr-0

6Ju

l-06

Oct

-06

Jan-

07A

pr-0

7Ju

l-07

Oct

-07

Jan-

08A

pr-0

8Ju

l-08

Oct

-08

Jan-

09A

pr-0

9Ju

l-09

Oct

-09

Jan-

10A

pr-1

0Ju

l-10

Oct

-10

Jan-

11A

pr-1

1Ju

l-11

Oct

-11

Jan-

12A

pr-1

2

Ch

lori

de,

Nit

rate

as

N, a

nd

Su

lfat

e (m

g/L

)

0

200

400

600

800

1000

1200

1400

TD

S (

mg

/L)

and

Ele

ctri

cal C

on

du

ctiv

ity

(mm

ho

s/cm

)




0

100

200

300

400

500

600

700

800

900

1000Ja

n-03

Apr

-03

Jul-0

3

Oct

-03

Jan-

04

Apr

-04

Jul-0

4

Oct

-04

Jan-

05

Apr

-05

Jul-0

5

Oct

-05

Jan-

06

Apr

-06

Jul-0

6

Oct

-06

Jan-

07

Apr

-07

Jul-0

7

Oct

-07

Jan-

08

Apr

-08

Jul-0

8

Oct

-08

Jan-

09

Apr

-09

Jul-0

9

Oct

-09

Jan-

10

Apr

-10

Jul-1

0

Oct

-10

Jan-

11

Apr

-11

Jul-1

1

Oct

-11

Jan-

12

Apr

-12

Bic

arb

on

ate

(mg

/L)

0

50

100

150

200

250

So

diu

m a

nd

Mag

nes

ium

(m

g/L

)




0

20

40

60

80

100

120

140Ja

n-03

Apr

-03

Jul-0

3

Oct

-03

Jan-

04

Apr

-04

Jul-0

4

Oct

-04

Jan-

05

Apr

-05

Jul-0

5

Oct

-05

Jan-

06

Apr

-06

Jul-0

6

Oct

-06

Jan-

07

Apr

-07

Jul-0

7

Oct

-07

Jan-

08

Apr

-08

Jul-0

8

Oct

-08

Jan-

09

Apr

-09

Jul-0

9

Oct

-09

Jan-

10

Apr

-10

Jul-1

0

Oct

-10

Jan-

11

Apr

-11

Jul-1

1

Oct

-11

Jan-

12

Apr

-12

Ch

lori

de,

Nit

rate

as

N, a

nd

Su

lfat

e (m

g/L

)

0

200

400

600

800

1000

1200

1400

TD

S (

mg

/L)

and

Ele

ctri

cal C

on

du

ctiv

ity

(mm

ho

s/cm

)




0

100

200

300

400

500

600

700

800

900

1000Ja

n-03

Apr

-03

Jul-0

3

Oct

-03

Jan-

04

Apr

-04

Jul-0

4

Oct

-04

Jan-

05

Apr

-05

Jul-0

5

Oct

-05

Jan-

06

Apr

-06

Jul-0

6

Oct

-06

Jan-

07

Apr

-07

Jul-0

7

Oct

-07

Jan-

08

Apr

-08

Jul-0

8

Oct

-08

Jan-

09

Apr

-09

Jul-0

9

Oct

-09

Jan-

10

Apr

-10

Jul-1

0

Oct

-10

Jan-

11

Apr

-11

Jul-1

1

Oct

-11

Jan-

12

Apr

-12

Bic

arb

on

ate

(mg

/L)

0

50

100

150

200

250

So

diu

m a

nd

Mag

nes

ium

(m

g/L

)


APPENDIX B

MONITORING WELL SAMPLING DATA SHEETS

APPENDIX C

GROUNDWATER HYDROGRAPHS

DISCHARGER'S HYDROGRAPH:M-1A

Evans Road Landfill, Colusa County


30

35

40

45

50

55

60

65

70

75

80

85

90

95

100

May

-98

Sep

-98

Jan-

99M

ay-9

9S

ep-9

9Ja

n-00

May

-00

Sep

-00

Jan-

01M

ay-0

1S

ep-0

1Ja

n-02

May

-02

Sep

-02

Jan-

03M

ay-0

3S

ep-0

3Ja

n-04

May

-04

Sep

-04

Jan-

05M

ay-0

5S

ep-0

5Ja

n-06

May

-06

Sep

-06

Jan-

07M

ay-0

7S

ep-0

7Ja

n-08

May

-08

Sep

-08

Jan-

09M

ay-0

9S

ep-0

9Ja

n-10

May

-10

Sep

-10

Jan-

11M

ay-1

1S

ep-1

1Ja

n-12

Ele

vati

on (

ft. a

bov

e m

sl)

Top of screened interval

Bottom of screened interval

Pump intake

Bottom of Well

Groundwater Elevation

DISCHARGER'S HYDROGRAPH:M-1B



30

35

40

45

50

55

60

65

70

75

80

85

90

95

100

Jan-

03

May

-03

Sep

-03

Jan-

04

May

-04

Sep

-04

Jan-

05

May

-05

Sep

-05

Jan-

06

May

-06

Sep

-06

Jan-

07

May

-07

Sep

-07

Jan-

08

May

-08

Sep

-08

Jan-

09

May

-09

Sep

-09

Jan-

10

May

-10

Sep

-10

Jan-

11

May

-11

Sep

-11

Jan-

12

Ele

vati

on (

ft. a

bov

e m

sl)



Pump intake

Bottom of Well


DISCHARGER'S HYDROGRAPH:M-3A



30

35

40

45

50

55

60

65

70

75

80

85

90

95

100

May

-98

Sep

-98

Jan-

99M

ay-9

9S

ep-9

9Ja

n-00

May

-00

Sep

-00

Jan-

01M

ay-0

1S

ep-0

1Ja

n-02

May

-02

Sep

-02

Jan-

03M

ay-0

3S

ep-0

3Ja

n-04

May

-04

Sep

-04

Jan-

05M

ay-0

5S

ep-0

5Ja

n-06

May

-06

Sep

-06

Jan-

07M

ay-0

7S

ep-0

7Ja

n-08

May

-08

Sep

-08

Jan-

09M

ay-0

9S

ep-0

9Ja

n-10

May

-10

Sep

-10

Jan-

11M

ay-1

1S

ep-1

1Ja

n-12

Ele

vati

on (

ft. a

bov

e m

sl)



Pump intake

Bottom of Well


DISCHARGER'S HYDROGRAPH:M-4



30

35

40

45

50

55

60

65

70

75

80

85

90

95

100

Jan-

95M

ay-9

5S

ep-9

5Ja

n-96

May

-96

Sep

-96

Jan-

97M

ay-9

7S

ep-9

7Ja

n-98

May

-98

Sep

-98

Jan-

99M

ay-9

9S

ep-9

9Ja

n-00

May

-00

Sep

-00

Jan-

01M

ay-0

1S

ep-0

1Ja

n-02

May

-02

Sep

-02

Jan-

03M

ay-0

3S

ep-0

3Ja

n-04

May

-04

Sep

-04

Jan-

05M

ay-0

5S

ep-0

5Ja

n-06

May

-06

Sep

-06

Jan-

07M

ay-0

7S

ep-0

7Ja

n-08

May

-08

Sep

-08

Jan-

09M

ay-0

9S

ep-0

9Ja

n-10

May

-10

Sep

-10

Jan-

11M

ay-1

1S

ep-1

1Ja

n-12

Ele

vati

on (

ft. a

bov

e m

sl)

Pump intake

Bottom of Well


NOTE: SCREEN INTERVAL ELEVATIONS UNKNOWN FOR M-4

DISCHARGER'S HYDROGRAPH:M-5



30

35

40

45

50

55

60

65

70

75

80

85

90

95

100

Jan-

03

May

-03

Sep

-03

Jan-

04

May

-04

Sep

-04

Jan-

05

May

-05

Sep

-05

Jan-

06

May

-06

Sep

-06

Jan-

07

May

-07

Sep

-07

Jan-

08

May

-08

Sep

-08

Jan-

09

May

-09

Sep

-09

Jan-

10

May

-10

Sep

-10

Jan-

11

May

-11

Sep

-11

Jan-

12

Ele

vati

on (

ft. a

bov

e m

sl)



Pump intake

Bottom of Well


APPENDIX D

LABORATORY ANALYTICAL REPORT AND CHAIN OF CUSTODY DOCUMENTATION

Haling & Associates

RE: Colusa Co.-Evans Rd. LF-SW

Chico, CA 95973

166 E. Eaton Rd., Suite B

Sean Foley For Sheri L. SpeaksProject Manager

Enclosed are the results of analyses for samples received by the laboratory on 03/06/12 16:00. If you have any questions

concerning this report, please feel free to contact me.

Sincerely,

25 June 2012

Work Order: 12C0258

Attn: Greg Haling

ELAP Certificate Numbers 1551 and 2728

Project:

Project Number:

Project Manager:

06/25/12 09:52

Haling & Associates


Colusa Co.-Evans Rd. LF-SW


Greg HalingChico CA, 95973

Reported:

Sample ID Laboratory ID Matrix Date Sampled

ANALYTICAL REPORT FOR SAMPLES

Date Received

MW-1A 12C0258-01 Water 03/05/12 10:45 03/06/12 16:00

MW-1B 12C0258-02 Water 03/05/12 10:00 03/06/12 16:00

MW-3A 12C0258-03 Water 03/05/12 13:15 03/06/12 16:00

MW-4 12C0258-04 Water 03/05/12 12:30 03/06/12 16:00

MW-5 12C0258-05 Water 03/05/12 12:00 03/06/12 16:00

MW-6 12C0258-06 Water 03/05/12 10:00 03/06/12 16:00

Alpha Analytical Laboratories, Inc. The results in this report apply to the samples analyzed in accordance with the chain of

custody document. This analytical report must be reproduced in its entirety.

Bruce L. Gove

Laboratory Director

6/25/2012

Page 1 of 34

Project:

Project Number:

Project Manager:

06/25/12 09:52

Haling & Associates





Reported:

Metals by EPA 200 Series Methods

Alpha Analytical Laboratories, Inc.

Analyte Result MDL Limit

Reporting

Units Dilution Batch Prepared Analyzed Method Notes

MW-1A (12C0258-01) Water Sampled: 03/05/12 10:45 Received: 03/06/12 16:00

29 AC20825 03/08/12 08:40 03/12/12 13:08 EPA 200.7mg/l 1Magnesium 1.0

38 " " " "" "Sodium 1.0

MW-1B (12C0258-02) Water Sampled: 03/05/12 10:00 Received: 03/06/12 16:00


31 " " " "" "Sodium 1.0



25 " " " "" "Sodium 1.0

MW-4 (12C0258-04) Water Sampled: 03/05/12 12:30 Received: 03/06/12 16:00


26 " " " "" "Sodium 1.0



31 " " " "" "Sodium 1.0



Bruce L. Gove

Laboratory Director

6/25/2012

Page 2 of 34

Project:

Project Number:

Project Manager:

06/25/12 09:52

Haling & Associates





Reported:

Conventional Chemistry Parameters by APHA/EPA Methods



Reporting



160 AC20649 03/07/12 14:00 03/07/12 17:00 SM2320Bmg/l 1Bicarbonate 5.0

260 AC20737 " 03/12/12 16:00 SM2540C" "Total Dissolved Solids 10

750 AC20649 " 03/07/12 17:00 SM2310BNTU 5Turbidity 0.50 T-6




130 AC20649 " 03/07/12 17:00 SM2310BNTU "Turbidity 0.10 T-6








420 AC20649 " 03/07/12 17:00 SM2310BNTU "Turbidity 0.10 T-6







Bruce L. Gove

Laboratory Director

6/25/2012

Page 3 of 34

Project:

Project Number:

Project Manager:

06/25/12 09:52

Haling & Associates





Reported:

Anions by EPA Method 300.0



Reporting



25 AC20727 03/07/12 08:55 03/07/12 10:05 EPA 300.0mg/l 5Chloride 2.5

2.6 " " " "" 1Nitrate as N 0.20

33 " " " "" "Sulfate as SO4 0.50


2.3 AC20727 03/07/12 08:55 03/07/12 09:50 EPA 300.0mg/l 1Chloride 0.50

"" "" ""Nitrate as N ND 0.20

1.9 " " " "" "Sulfate as SO4 0.50



2.6 " " " "" 1Nitrate as N 0.20

39 " " " "" "Sulfate as SO4 0.50



1.0 " " " "" "Nitrate as N 0.20

25 " " " "" "Sulfate as SO4 0.50



"" 03/07/12 11:05" "1Nitrate as N ND 0.20

26 " " " "" "Sulfate as SO4 0.50



Bruce L. Gove

Laboratory Director

6/25/2012

Page 4 of 34

Project:

Project Number:

Project Manager:

06/25/12 09:52

Haling & Associates





Reported:

Volatile Organic Compounds by EPA Method 8260B



Reporting



EPA 8260B03/13/12 09:00 03/13/12 23:33ug/l AC214291Acetone ND 5.0

"" "" ""Acrylonitrile ND 5.0

"" "" ""Benzene ND 0.30

"" "" ""Bromochloromethane ND 0.50

"" "" ""Bromodichloromethane ND 0.50

"" "" ""Bromoform ND 0.50

"" "" ""Carbon disulfide ND 5.0

"" "" ""Carbon tetrachloride ND 0.50

"" "" ""Chlorobenzene ND 0.50

"" "" ""Chloroethane ND 0.50

"" "" ""Chloroform ND 0.50

"" "" ""Dibromochloromethane ND 0.50

"" "" ""1,2-Dibromo-3-chloropropane ND 2.0

"" "" ""1,2-Dibromoethane (EDB) ND 0.50

"" "" ""1,2-Dichlorobenzene ND 0.50



"" "" ""trans-1,4-Dichloro-2-butene ND 5.0

"" "" ""Dichlorodifluoromethane ND 0.50

"" "" ""1,1-Dichloroethane ND 0.50


"" "" ""1,1-Dichloroethene ND 0.50

"" "" ""cis-1,2-Dichloroethene ND 0.50

"" "" ""trans-1,2-Dichloroethene ND 0.50

"" "" ""1,2-Dichloropropane ND 0.50

"" "" ""cis-1,3-Dichloropropene ND 0.50

"" "" ""trans-1,3-Dichloropropene ND 0.50

"" "" ""Di-isopropyl ether ND 0.50

"" "" ""Ethanol ND 25

"" "" ""Ethyl tert-butyl ether ND 0.50



Bruce L. Gove

Laboratory Director

6/25/2012

Page 5 of 34

Project:

Project Number:

Project Manager:

06/25/12 09:52

Haling & Associates





Reported:




Reporting



EPA 8260B03/13/12 09:00 03/13/12 23:33ug/l AC214291Ethylbenzene ND 0.50

"" "" ""2-Hexanone ND 5.0

"" "" ""Hexachlorobutadiene ND 0.50

"" "" ""Hexachloroethane ND 1.0

"" "" ""Bromomethane ND 0.50

"" "" ""Chloromethane ND 0.50

"" "" ""Dibromomethane ND 0.50

"" "" ""Methylene chloride ND 0.50

"" "" ""Methyl ethyl ketone ND 1.0

"" "" ""Methyl iodide ND 2.0

"" "" ""Methyl tert-butyl ether ND 0.50

"" "" ""Methyl isobutyl ketone ND 1.0

"" "" ""Naphthalene ND 0.50

"" "" ""Styrene ND 0.50

"" "" ""Tert-amyl methyl ether ND 0.50

"" "" ""Tert-butyl alcohol ND 10

"" "" ""1,1,1,2-Tetrachloroethane ND 0.50


"" "" ""Tetrachloroethene ND 0.50

"" "" ""Toluene ND 0.30

"" "" ""1,2,4-Trichlorobenzene ND 0.50

"" "" ""1,1,1-Trichloroethane ND 0.50


"" "" ""Trichloroethene ND 0.50

"" "" ""Trichlorofluoromethane ND 0.50

"" "" ""1,2,3-Trichloropropane ND 0.50

"" "" ""Vinyl acetate ND 1.0

"" "" ""Vinyl chloride ND 0.50

"" "" ""m,p-Xylene ND 0.50

"" "" ""o-Xylene ND 0.50



Bruce L. Gove

Laboratory Director

6/25/2012

Page 6 of 34

Project:

Project Number:

Project Manager:

06/25/12 09:52

Haling & Associates





Reported:




Reporting



EPA 8260B03/13/12 09:00 03/13/12 23:33ug/l AC214291Xylenes (total) ND 0.50

" " " "83.3 % 70-130Surrogate: Bromofluorobenzene

" " " "77.2 % 46-130Surrogate: Dibromofluoromethane

" " " "78.8 % 59-132Surrogate: Toluene-d8




"" "" ""Benzene ND 0.30
























Bruce L. Gove

Laboratory Director

6/25/2012

Page 7 of 34

Project:

Project Number:

Project Manager:

06/25/12 09:52

Haling & Associates





Reported:




Reporting



EPA 8260B03/13/12 09:00 03/14/12 00:07ug/l AC2142911,2-Dichloropropane ND 0.50






"" "" ""Ethylbenzene ND 0.50













"" "" ""Styrene ND 0.50






"" "" ""Toluene ND 0.30







Bruce L. Gove

Laboratory Director

6/25/2012

Page 8 of 34

Project:

Project Number:

Project Manager:

06/25/12 09:52

Haling & Associates





Reported:




Reporting



EPA 8260B03/13/12 09:00 03/14/12 00:07ug/l AC214291Trichlorofluoromethane ND 0.50




"" "" ""m,p-Xylene ND 0.50

"" "" ""o-Xylene ND 0.50

"" "" ""Xylenes (total) ND 0.50







"" "" ""Benzene ND 0.30


















Bruce L. Gove

Laboratory Director

6/25/2012

Page 9 of 34

Project:

Project Number:

Project Manager:

06/25/12 09:52

Haling & Associates





Reported:




Reporting



EPA 8260B03/13/12 09:00 03/14/12 00:41ug/l AC214291Dichlorodifluoromethane ND 0.50

























"" "" ""Styrene ND 0.50







Bruce L. Gove

Laboratory Director

6/25/2012

Page 10 of 34

Project:

Project Number:

Project Manager:

06/25/12 09:52

Haling & Associates





Reported:




Reporting



EPA 8260B03/13/12 09:00 03/14/12 00:41ug/l AC214291Tetrachloroethene ND 0.50

"" "" ""Toluene ND 0.30









"" "" ""m,p-Xylene ND 0.50

"" "" ""o-Xylene ND 0.50








"" "" ""Benzene ND 0.30












Bruce L. Gove

Laboratory Director

6/25/2012

Page 11 of 34

Project:

Project Number:

Project Manager:

06/25/12 09:52

Haling & Associates





Reported:




Reporting



EPA 8260B03/13/12 09:00 03/14/12 01:15ug/l AC2142911,2-Dibromo-3-chloropropane ND 2.0
































Bruce L. Gove

Laboratory Director

6/25/2012

Page 12 of 34

Project:

Project Number:

Project Manager:

06/25/12 09:52

Haling & Associates





Reported:




Reporting



EPA 8260B03/13/12 09:00 03/14/12 01:15ug/l AC214291Naphthalene ND 0.50

"" "" ""Styrene ND 0.50






"" "" ""Toluene ND 0.30









"" "" ""m,p-Xylene ND 0.50

"" "" ""o-Xylene ND 0.50








"" "" ""Benzene ND 0.30






Bruce L. Gove

Laboratory Director

6/25/2012

Page 13 of 34

Project:

Project Number:

Project Manager:

06/25/12 09:52

Haling & Associates





Reported:




Reporting



EPA 8260B03/13/12 09:00 03/13/12 16:07ug/l AC214291Carbon disulfide ND 5.0
































Bruce L. Gove

Laboratory Director

6/25/2012

Page 14 of 34

Project:

Project Number:

Project Manager:

06/25/12 09:52

Haling & Associates





Reported:




Reporting



EPA 8260B03/13/12 09:00 03/13/12 16:07ug/l AC214291Dibromomethane ND 0.50







"" "" ""Styrene ND 0.50






"" "" ""Toluene ND 0.30









"" "" ""m,p-Xylene ND 0.50

"" "" ""o-Xylene ND 0.50







Bruce L. Gove

Laboratory Director

6/25/2012

Page 15 of 34

Project:

Project Number:

Project Manager:

06/25/12 09:52

Haling & Associates





Reported:




Reporting





"" "" ""Benzene ND 0.30






























Bruce L. Gove

Laboratory Director

6/25/2012

Page 16 of 34

Project:

Project Number:

Project Manager:

06/25/12 09:52

Haling & Associates





Reported:




Reporting



EPA 8260B03/13/12 09:00 03/14/12 01:50ug/l AC214291Ethylbenzene ND 0.50













"" "" ""Styrene ND 0.50






"" "" ""Toluene ND 0.30









"" "" ""m,p-Xylene ND 0.50

"" "" ""o-Xylene ND 0.50



Bruce L. Gove

Laboratory Director

6/25/2012

Page 17 of 34

Project:

Project Number:

Project Manager:

06/25/12 09:52

Haling & Associates





Reported:




Reporting



EPA 8260B03/13/12 09:00 03/14/12 01:50ug/l AC214291Xylenes (total) ND 0.50






Bruce L. Gove

Laboratory Director

6/25/2012

Page 18 of 34

Project:

Project Number:

Project Manager:

06/25/12 09:52

Haling & Associates





Reported:

Result MDL Limit

Reporting

Units Level

Spike

Result

Source

%REC

%REC

Limits RPD

RPD

Limit Notes Analyte

Metals by EPA 200 Series Methods - Quality Control


Batch AC20825 - Metals Digest

Blank (AC20825-BLK1) Prepared: 03/08/12 Analyzed: 03/09/12

Magnesium mg/lND 1.0

Sodium "ND 1.0

LCS (AC20825-BS1) Prepared: 03/08/12 Analyzed: 03/09/12

Magnesium mg/l8.15 1.0 8.00 85-115102

Sodium "7.54 1.0 8.00 85-11594.2

Duplicate (AC20825-DUP1) Source: 12C0258-05 Prepared: 03/08/12 Analyzed: 03/09/12

Magnesium mg/l116 1.0 123 205.54

Sodium "30.1 1.0 31.5 204.39

Matrix Spike (AC20825-MS1) Source: 12C0258-05 Prepared: 03/08/12 Analyzed: 03/09/12

Magnesium mg/l126 1.0 8.00 123 QM-4X70-13037.7

Sodium "38.6 1.0 8.00 31.5 70-13089.6

Matrix Spike (AC20825-MS2) Source: 12C0192-02 Prepared: 03/08/12 Analyzed: 03/09/12

Magnesium mg/l17.2 1.0 8.00 9.03 70-130102

Sodium "177 1.0 8.00 168 70-130119

Matrix Spike Dup (AC20825-MSD1) Source: 12C0258-05 Prepared: 03/08/12 Analyzed: 03/09/12

Magnesium mg/l126 1.0 8.00 123 20 QM-4X70-130 0.49345.5

Sodium "38.6 1.0 8.00 31.5 2070-130 0.060989.9



Bruce L. Gove

Laboratory Director

6/25/2012

Page 19 of 34

Project:

Project Number:

Project Manager:

06/25/12 09:52

Haling & Associates





Reported:

Result MDL Limit

Reporting

Units Level

Spike

Result

Source

%REC

%REC

Limits RPD

RPD

Limit Notes Analyte

Conventional Chemistry Parameters by APHA/EPA Methods - Quality Control


Batch AC20649 - General Preparation

Duplicate (AC20649-DUP1) Source: 12C0258-05 Prepared & Analyzed: 03/07/12

Bicarbonate mg/l586 5.0 580 201.05

Turbidity NTU2210 0.50 2210 300.00


Blank (AC20737-BLK1) Prepared: 03/07/12 Analyzed: 03/12/12

Total Dissolved Solids mg/lND 10


Total Dissolved Solids mg/l171 10 168 301.77


Total Dissolved Solids mg/l616 10 588 304.65



Bruce L. Gove

Laboratory Director

6/25/2012

Page 20 of 34

Project:

Project Number:

Project Manager:

06/25/12 09:52

Haling & Associates





Reported:

Result MDL Limit

Reporting

Units Level

Spike

Result

Source

%REC

%REC

Limits RPD

RPD

Limit Notes Analyte

Anions by EPA Method 300.0 - Quality Control



Blank (AC20727-BLK1) Prepared & Analyzed: 03/07/12

Nitrate as N mg/lND 0.20

Chloride "ND 0.50

Sulfate as SO4 "ND 0.50

LCS (AC20727-BS1) Prepared & Analyzed: 03/07/12

Sulfate as SO4 mg/l21.8 0.50 22.2 90-11098.0

Nitrate as N "5.41 0.20 5.56 90-11097.3

Chloride "10.9 0.50 11.1 90-11098.0

Duplicate (AC20727-DUP1) Source: 12C0258-05 Prepared & Analyzed: 03/07/12

Nitrate as N mg/l0.134 0.20 0.134 200.00

Sulfate as SO4 "26.3 0.50 26.3 200.247

Chloride "58.4 5.0 58.4 200.154

Matrix Spike (AC20727-MS1) Source: 12C0258-05 Prepared & Analyzed: 03/07/12

Nitrate as N mg/l5.73 2.0 5.56 0.134 80-120101

Chloride "70.6 5.0 11.1 58.4 80-120110

Sulfate as SO4 "47.3 5.0 22.2 26.3 80-12094.5


Chloride mg/l35.6 1.0 11.1 24.0 80-120105

Nitrate as N "5.46 0.40 5.56 0.145 80-12095.6

Sulfate as SO4 "35.3 1.0 22.2 13.0 80-120100

Matrix Spike Dup (AC20727-MSD1) Source: 12C0258-05 Prepared & Analyzed: 03/07/12

Nitrate as N mg/l5.76 2.0 5.56 0.134 2080-120 0.524101

Sulfate as SO4 "47.4 5.0 22.2 26.3 2080-120 0.18894.9

Chloride "70.2 5.0 11.1 58.4 2080-120 0.647106



Bruce L. Gove

Laboratory Director

6/25/2012

Page 21 of 34

Project:

Project Number:

Project Manager:

06/25/12 09:52

Haling & Associates





Reported:

Result MDL Limit

Reporting

Units Level

Spike

Result

Source

%REC

%REC

Limits RPD

RPD

Limit Notes Analyte

Volatile Organic Compounds by EPA Method 8260B - Quality Control


Batch AC21429 - VOAs in Water GCMS


Acetone ug/lND 5.0

Acrylonitrile "ND 5.0

Benzene "ND 0.30

Bromochloromethane "ND 0.50

Bromodichloromethane "ND 0.50

Bromoform "ND 0.50

Carbon disulfide "ND 5.0

Carbon tetrachloride "ND 0.50

Chlorobenzene "ND 0.50

Chloroethane "ND 0.50

Chloroform "ND 0.50

Dibromochloromethane "ND 0.50

1,2-Dibromo-3-chloropropane "ND 2.0

1,2-Dibromoethane (EDB) "ND 0.50

1,2-Dichlorobenzene "ND 0.50



trans-1,4-Dichloro-2-butene "ND 5.0

Dichlorodifluoromethane "ND 0.50

1,1-Dichloroethane "ND 0.50

1,2-Dichloroethane "ND 0.50

1,1-Dichloroethene "ND 0.50

cis-1,2-Dichloroethene "ND 0.50

trans-1,2-Dichloroethene "ND 0.50

1,2-Dichloropropane "ND 0.50

cis-1,3-Dichloropropene "ND 0.50

trans-1,3-Dichloropropene "ND 0.50

Di-isopropyl ether "ND 0.50

Ethanol "ND 25



Bruce L. Gove

Laboratory Director

6/25/2012

Page 22 of 34

Project:

Project Number:

Project Manager:

06/25/12 09:52

Haling & Associates





Reported:

Result MDL Limit

Reporting

Units Level

Spike

Result

Source

%REC

%REC

Limits RPD

RPD

Limit Notes Analyte





Ethyl tert-butyl ether ug/lND 0.50

Ethylbenzene "ND 0.50

2-Hexanone "ND 5.0

Hexachlorobutadiene "ND 0.50

Hexachloroethane "ND 1.0

Chloromethane "ND 0.50

Bromomethane "ND 0.50

Dibromomethane "ND 0.50

Methylene chloride "ND 0.50

Methyl ethyl ketone "ND 1.0

Methyl iodide "ND 2.0

Methyl tert-butyl ether "ND 0.50

Methyl isobutyl ketone "ND 1.0

Naphthalene "ND 0.50

Styrene "ND 0.50

Tert-amyl methyl ether "ND 0.50

Tert-butyl alcohol "ND 10

1,1,1,2-Tetrachloroethane "ND 0.50

1,1,2,2-Tetrachloroethane "ND 0.50

Tetrachloroethene "ND 0.50

Toluene "ND 0.30

1,2,4-Trichlorobenzene "ND 0.50

1,1,1-Trichloroethane "ND 0.50

1,1,2-Trichloroethane "ND 0.50

Trichloroethene "ND 0.50

Trichlorofluoromethane "ND 0.50

1,2,3-Trichloropropane "ND 0.50

Vinyl acetate "ND 1.0

Vinyl chloride "ND 0.50



Bruce L. Gove

Laboratory Director

6/25/2012

Page 23 of 34

Project:

Project Number:

Project Manager:

06/25/12 09:52

Haling & Associates





Reported:

Result MDL Limit

Reporting

Units Level

Spike

Result

Source

%REC

%REC

Limits RPD

RPD

Limit Notes Analyte





m,p-Xylene ug/lND 0.50

o-Xylene "ND 0.50

Xylenes (total) "ND 0.50

Surrogate: Bromofluorobenzene " 25.0 70-13020.5 82.0

Surrogate: Dibromofluoromethane " 25.0 46-13019.2 76.6

Surrogate: Toluene-d8 " 25.0 59-13219.7 78.9


Acetone ug/l99.0 5.0 80.0 48-124124

Acrylonitrile "19.4 5.0 20.0 70-13096.8

Benzene "20.6 0.30 20.0 82-122103

Bromochloromethane "20.5 0.50 20.0 83-124103

Bromodichloromethane "21.2 0.50 20.0 86-135106

Bromoform "19.3 0.50 20.0 76-14496.4

Carbon disulfide "20.3 5.0 20.0 70-130101

Carbon tetrachloride "20.6 0.50 20.0 77-134103

Chlorobenzene "20.5 0.50 20.0 84-119102

Chloroethane "19.5 0.50 20.0 68-13397.6

Chloroform "20.5 0.50 20.0 81-122102

Dibromochloromethane "19.8 0.50 20.0 83-13599.0

1,2-Dibromo-3-chloropropane "18.8 2.0 20.0 73-12894.2

1,2-Dibromoethane (EDB) "20.7 0.50 20.0 80-120104

1,2-Dichlorobenzene "20.5 0.50 20.0 84-121103



trans-1,4-Dichloro-2-butene "22.3 5.0 20.0 90-145111

Dichlorodifluoromethane "20.2 0.50 20.0 52-142101

1,1-Dichloroethane "20.3 0.50 20.0 81-126102

1,2-Dichloroethane "19.9 0.50 20.0 77-11799.4



Bruce L. Gove

Laboratory Director

6/25/2012

Page 24 of 34

Project:

Project Number:

Project Manager:

06/25/12 09:52

Haling & Associates





Reported:

Result MDL Limit

Reporting

Units Level

Spike

Result

Source

%REC

%REC

Limits RPD

RPD

Limit Notes Analyte





1,1-Dichloroethene ug/l19.6 0.50 20.0 71-15198.2

cis-1,2-Dichloroethene "20.7 0.50 20.0 84-131104

trans-1,2-Dichloroethene "20.6 0.50 20.0 79-128103

1,2-Dichloropropane "21.0 0.50 20.0 82-125105

cis-1,3-Dichloropropene "20.3 0.50 20.0 83-128102

trans-1,3-Dichloropropene "20.8 0.50 20.0 67-129104

Di-isopropyl ether "20.6 0.50 20.0 83-132103

Ethanol "966 25 980 50-15098.6

Ethyl tert-butyl ether "22.2 0.50 20.0 74-127111

Ethylbenzene "21.8 0.50 20.0 84-124109

2-Hexanone "17.2 5.0 20.0 70-13085.8

Hexachlorobutadiene "19.6 0.50 20.0 75-13597.8

Hexachloroethane "19.1 1.0 20.0 70-13095.4

Bromomethane "28.1 0.50 20.0 69-145140

Chloromethane "21.2 0.50 20.0 63-129106

Dibromomethane "20.5 0.50 20.0 82-124102

Methylene chloride "20.1 0.50 20.0 72-132101

Methyl ethyl ketone "45.5 1.0 40.0 58-157114

Methyl iodide "16.5 2.0 20.0 56-16782.5

Methyl tert-butyl ether "19.6 0.50 20.0 84-11997.8

Methyl isobutyl ketone "40.3 1.0 40.0 70-130101

Naphthalene "18.5 0.50 20.0 84-13492.6

Styrene "23.0 0.50 20.0 80-125115

Tert-amyl methyl ether "18.8 0.50 20.0 74-12093.8

Tert-butyl alcohol "391 10 400 66-14797.6

1,1,1,2-Tetrachloroethane "20.4 0.50 20.0 80-132102

1,1,2,2-Tetrachloroethane "19.6 0.50 20.0 84-11598.2

Tetrachloroethene "30.9 0.50 20.0 56-156154

Toluene "20.5 0.30 20.0 76-137103



Bruce L. Gove

Laboratory Director

6/25/2012

Page 25 of 34

Project:

Project Number:

Project Manager:

06/25/12 09:52

Haling & Associates





Reported:

Result MDL Limit

Reporting

Units Level

Spike

Result

Source

%REC

%REC

Limits RPD

RPD

Limit Notes Analyte





1,2,4-Trichlorobenzene ug/l22.0 0.50 20.0 84-126110

1,1,1-Trichloroethane "21.0 0.50 20.0 70-130105

1,1,2-Trichloroethane "20.6 0.50 20.0 83-122103

Trichloroethene "21.4 0.50 20.0 84-123107

Trichlorofluoromethane "19.8 0.50 20.0 74-13098.8

1,2,3-Trichloropropane "20.5 0.50 20.0 78-122103

Vinyl acetate "42.2 1.0 40.0 60-140106

Vinyl chloride "22.2 0.50 20.0 70-130111

m,p-Xylene "43.1 0.50 40.0 81-124108

o-Xylene "22.2 0.50 20.0 80-126111

Xylenes (total) "65.2 0.50 60.0 81-126109




LCS Dup (AC21429-BSD1) Prepared & Analyzed: 03/13/12

Acetone ug/l99.0 5.0 80.0 2548-124 0.0808124

Acrylonitrile "18.6 5.0 20.0 2570-130 3.9093.1

Benzene "21.0 0.30 20.0 2582-122 1.59105

Bromochloromethane "20.5 0.50 20.0 2583-124 0.0487103

Bromodichloromethane "21.6 0.50 20.0 2586-135 1.82108

Bromoform "20.1 0.50 20.0 2576-144 4.21101

Carbon disulfide "20.6 5.0 20.0 3070-130 1.52103

Carbon tetrachloride "21.6 0.50 20.0 2577-134 4.41108

Chlorobenzene "20.7 0.50 20.0 2584-119 1.16104

Chloroethane "19.6 0.50 20.0 2568-133 0.15397.8

Chloroform "21.1 0.50 20.0 2581-122 2.79105

Dibromochloromethane "20.6 0.50 20.0 2583-135 4.06103

1,2-Dibromo-3-chloropropane "18.1 2.0 20.0 2573-128 4.0190.4



Bruce L. Gove

Laboratory Director

6/25/2012

Page 26 of 34

Project:

Project Number:

Project Manager:

06/25/12 09:52

Haling & Associates





Reported:

Result MDL Limit

Reporting

Units Level

Spike

Result

Source

%REC

%REC

Limits RPD

RPD

Limit Notes Analyte





1,2-Dibromoethane (EDB) ug/l20.8 0.50 20.0 2580-120 0.625104

1,2-Dichlorobenzene "21.1 0.50 20.0 2584-121 2.93106



trans-1,4-Dichloro-2-butene "21.6 5.0 20.0 3090-145 3.24108

Dichlorodifluoromethane "19.8 0.50 20.0 2552-142 1.6599.1

1,1-Dichloroethane "20.8 0.50 20.0 2581-126 2.43104

1,2-Dichloroethane "19.9 0.50 20.0 2577-117 0.20199.6

1,1-Dichloroethene "20.2 0.50 20.0 2571-151 2.86101

cis-1,2-Dichloroethene "20.9 0.50 20.0 2584-131 0.625104

trans-1,2-Dichloroethene "21.1 0.50 20.0 2579-128 2.54106

1,2-Dichloropropane "21.4 0.50 20.0 2582-125 1.65107

cis-1,3-Dichloropropene "20.6 0.50 20.0 2583-128 1.61103

trans-1,3-Dichloropropene "21.6 0.50 20.0 2567-129 4.06108

Di-isopropyl ether "21.6 0.50 20.0 2583-132 4.78108

Ethanol "970 25 980 2550-150 0.39899.0

Ethyl tert-butyl ether "22.9 0.50 20.0 2574-127 2.93114

Ethylbenzene "22.0 0.50 20.0 2584-124 1.32110

2-Hexanone "17.9 5.0 20.0 3070-130 4.3489.6

Hexachlorobutadiene "20.0 0.50 20.0 2575-135 2.47100

Hexachloroethane "20.1 1.0 20.0 2570-130 5.31101

Chloromethane "21.6 0.50 20.0 2563-129 1.96108

Bromomethane "28.9 0.50 20.0 2569-145 2.95145

Dibromomethane "20.4 0.50 20.0 2582-124 0.391102

Methylene chloride "20.6 0.50 20.0 2572-132 2.40103

Methyl ethyl ketone "46.7 1.0 40.0 2558-157 2.49117

Methyl iodide "21.0 2.0 20.0 3056-167 23.9105

Methyl tert-butyl ether "20.1 0.50 20.0 2584-119 2.62100

Methyl isobutyl ketone "41.4 1.0 40.0 2570-130 2.60103



Bruce L. Gove

Laboratory Director

6/25/2012

Page 27 of 34

Project:

Project Number:

Project Manager:

06/25/12 09:52

Haling & Associates





Reported:

Result MDL Limit

Reporting

Units Level

Spike

Result

Source

%REC

%REC

Limits RPD

RPD

Limit Notes Analyte





Naphthalene ug/l18.5 0.50 20.0 2584-134 0.054092.5

Styrene "23.3 0.50 20.0 2580-125 1.38117

Tert-amyl methyl ether "19.2 0.50 20.0 2574-120 2.1195.8

Tert-butyl alcohol "407 10 400 2566-147 4.21102

1,1,1,2-Tetrachloroethane "21.4 0.50 20.0 2580-132 4.31107

1,1,2,2-Tetrachloroethane "19.8 0.50 20.0 2584-115 0.91299.2

Tetrachloroethene "30.3 0.50 20.0 2556-156 1.86151

Toluene "21.0 0.30 20.0 2576-137 2.03105

1,2,4-Trichlorobenzene "22.3 0.50 20.0 2584-126 1.26111

1,1,1-Trichloroethane "21.9 0.50 20.0 2570-130 4.20110

1,1,2-Trichloroethane "21.2 0.50 20.0 2583-122 2.49106

Trichloroethene "21.3 0.50 20.0 2584-123 0.749106

Trichlorofluoromethane "19.8 0.50 20.0 2574-130 0.20299.0

1,2,3-Trichloropropane "21.1 0.50 20.0 2578-122 2.74105

Vinyl acetate "46.7 1.0 40.0 2560-140 10.2117

Vinyl chloride "21.4 0.50 20.0 2570-130 4.03107

m,p-Xylene "43.3 0.50 40.0 2581-124 0.579108

o-Xylene "22.6 0.50 20.0 2580-126 2.01113

Xylenes (total) "65.9 0.50 60.0 2581-126 1.07110





Acetone ug/l105 5.0 80.0 ND 32-164131

Acrylonitrile "18.9 5.0 20.0 ND 70-13094.5

Benzene "22.5 0.30 20.0 ND 58-139112

Bromochloromethane "21.1 0.50 20.0 ND 60-141106

Bromodichloromethane "22.8 0.50 20.0 ND 62-140114



Bruce L. Gove

Laboratory Director

6/25/2012

Page 28 of 34

Project:

Project Number:

Project Manager:

06/25/12 09:52

Haling & Associates





Reported:

Result MDL Limit

Reporting

Units Level

Spike

Result

Source

%REC

%REC

Limits RPD

RPD

Limit Notes Analyte





Bromoform ug/l19.9 0.50 20.0 ND 47-16599.6

Carbon disulfide "22.8 5.0 20.0 ND 70-130114

Carbon tetrachloride "23.9 0.50 20.0 ND 65-153120

Chlorobenzene "21.9 0.50 20.0 ND 58-137110

Chloroethane "22.0 0.50 20.0 ND 59-141110

Chloroform "22.1 0.50 20.0 ND 36-151110

Dibromochloromethane "21.0 0.50 20.0 ND 54-157105

1,2-Dibromo-3-chloropropane "19.0 2.0 20.0 ND 54-13795.2

1,2-Dibromoethane (EDB) "21.4 0.50 20.0 ND 40-147107

1,2-Dichlorobenzene "21.7 0.50 20.0 ND 57-137109



trans-1,4-Dichloro-2-butene "22.4 5.0 20.0 ND 90-145112

Dichlorodifluoromethane "22.0 0.50 20.0 ND 39-162110

1,1-Dichloroethane "22.0 0.50 20.0 ND 64-136110

1,2-Dichloroethane "20.5 0.50 20.0 ND 58-133102

1,1-Dichloroethene "21.9 0.50 20.0 ND 45-178109

cis-1,2-Dichloroethene "22.1 0.50 20.0 ND 66-141110

trans-1,2-Dichloroethene "22.9 0.50 20.0 ND 59-151114

1,2-Dichloropropane "22.6 0.50 20.0 ND 62-128113

cis-1,3-Dichloropropene "21.5 0.50 20.0 ND 50-140107

trans-1,3-Dichloropropene "22.1 0.50 20.0 ND 40-144110

Di-isopropyl ether "22.3 0.50 20.0 ND 49-143112

Ethanol "903 25 980 ND 50-15092.1

Ethyl tert-butyl ether "23.1 0.50 20.0 ND 44-143115

Ethylbenzene "23.9 0.50 20.0 ND 59-147120

2-Hexanone "18.1 5.0 20.0 ND 70-13090.6

Hexachlorobutadiene "19.4 0.50 20.0 ND 56-14997.0

Hexachloroethane "21.0 1.0 20.0 ND 70-130105



Bruce L. Gove

Laboratory Director

6/25/2012

Page 29 of 34

Project:

Project Number:

Project Manager:

06/25/12 09:52

Haling & Associates





Reported:

Result MDL Limit

Reporting

Units Level

Spike

Result

Source

%REC

%REC

Limits RPD

RPD

Limit Notes Analyte





Chloromethane ug/l24.0 0.50 20.0 ND 69-149120

Bromomethane "30.2 0.50 20.0 ND 30-163151

Dibromomethane "21.6 0.50 20.0 ND 59-139108

Methylene chloride "21.3 0.50 20.0 ND 43-143107

Methyl ethyl ketone "48.6 1.0 40.0 ND 62-126122

Methyl iodide "19.8 2.0 20.0 ND 70-13098.8

Methyl tert-butyl ether "19.2 0.50 20.0 ND 55-14496.2

Methyl isobutyl ketone "41.7 1.0 40.0 ND 66-127104

Naphthalene "19.2 0.50 20.0 ND 52-15796.0

Styrene "24.6 0.50 20.0 ND 51-157123

Tert-amyl methyl ether "19.2 0.50 20.0 ND 41-13696.2

Tert-butyl alcohol "380 10 400 ND 38-17595.1

1,1,1,2-Tetrachloroethane "21.8 0.50 20.0 ND 58-146109

1,1,2,2-Tetrachloroethane "21.0 0.50 20.0 ND 73-127105

Tetrachloroethene "25.2 0.50 20.0 ND 49-148126

Toluene "22.3 0.30 20.0 ND 59-147111

1,2,4-Trichlorobenzene "22.7 0.50 20.0 ND 50-150114

1,1,1-Trichloroethane "23.6 0.50 20.0 ND 62-144118

1,1,2-Trichloroethane "22.0 0.50 20.0 ND 62-129110

Trichloroethene "23.2 0.50 20.0 ND 58-140116

Trichlorofluoromethane "22.9 0.50 20.0 ND 56-144115

1,2,3-Trichloropropane "21.3 0.50 20.0 ND 61-139106

Vinyl acetate "49.8 1.0 40.0 ND 70-130124

Vinyl chloride "29.8 0.50 20.0 ND 53-160149

m,p-Xylene "47.1 0.50 40.0 ND 53-147118

o-Xylene "24.0 0.50 20.0 ND 55-148120

Xylenes (total) "71.1 0.50 60.0 ND 49-153118





Bruce L. Gove

Laboratory Director

6/25/2012

Page 30 of 34

Project:

Project Number:

Project Manager:

06/25/12 09:52

Haling & Associates





Reported:

Result MDL Limit

Reporting

Units Level

Spike

Result

Source

%REC

%REC

Limits RPD

RPD

Limit Notes Analyte





Surrogate: Toluene-d8 ug/l 25.0 59-13219.0 76.1


Acetone ug/l97.7 5.0 80.0 ND 2532-164 7.28122

Acrylonitrile "17.0 5.0 20.0 ND 2570-130 10.585.1

Benzene "20.4 0.30 20.0 ND 2558-139 9.71102

Bromochloromethane "18.8 0.50 20.0 ND 2560-141 11.594.0

Bromodichloromethane "20.1 0.50 20.0 ND 2562-140 12.2101

Bromoform "18.3 0.50 20.0 ND 2547-165 8.5391.4

Carbon disulfide "20.4 5.0 20.0 ND 3070-130 11.0102

Carbon tetrachloride "21.7 0.50 20.0 ND 2565-153 9.65108

Chlorobenzene "19.6 0.50 20.0 ND 2558-137 10.998.2

Chloroethane "19.1 0.50 20.0 ND 2559-141 14.395.3

Chloroform "20.2 0.50 20.0 ND 2536-151 9.08101

Dibromochloromethane "18.6 0.50 20.0 ND 2554-157 12.292.8

1,2-Dibromo-3-chloropropane "18.0 2.0 20.0 ND 2554-137 5.8389.8

1,2-Dibromoethane (EDB) "19.2 0.50 20.0 ND 2540-147 10.696.0

1,2-Dichlorobenzene "19.6 0.50 20.0 ND 2557-137 10.497.9

1,3-Dichlorobenzene "20.9 0.50 20.0 ND 2554-137 10.6104

1,4-Dichlorobenzene "19.0 0.50 20.0 ND 2561-131 11.095.2

trans-1,4-Dichloro-2-butene "20.7 5.0 20.0 ND 3090-145 7.75104

Dichlorodifluoromethane "20.2 0.50 20.0 ND 2539-162 8.67101

1,1-Dichloroethane "19.9 0.50 20.0 ND 2564-136 9.9799.6

1,2-Dichloroethane "18.6 0.50 20.0 ND 2558-133 9.7892.9

1,1-Dichloroethene "20.0 0.50 20.0 ND 2545-178 8.88100

cis-1,2-Dichloroethene "19.8 0.50 20.0 ND 2566-141 11.099.0

trans-1,2-Dichloroethene "20.8 0.50 20.0 ND 2559-151 9.47104

1,2-Dichloropropane "20.3 0.50 20.0 ND 2562-128 10.5102

cis-1,3-Dichloropropene "19.5 0.50 20.0 ND 2550-140 9.6797.4



Bruce L. Gove

Laboratory Director

6/25/2012

Page 31 of 34

Project:

Project Number:

Project Manager:

06/25/12 09:52

Haling & Associates





Reported:

Result MDL Limit

Reporting

Units Level

Spike

Result

Source

%REC

%REC

Limits RPD

RPD

Limit Notes Analyte





trans-1,3-Dichloropropene ug/l19.6 0.50 20.0 ND 2540-144 12.097.9

Di-isopropyl ether "20.9 0.50 20.0 ND 2549-143 6.72104

Ethanol "800 25 980 ND 2550-150 12.181.6

Ethyl tert-butyl ether "21.3 0.50 20.0 ND 2544-143 7.84107

Ethylbenzene "21.4 0.50 20.0 ND 2559-147 11.0107

2-Hexanone "16.3 5.0 20.0 ND 3070-130 10.381.7

Hexachlorobutadiene "17.7 0.50 20.0 ND 2556-149 9.0088.6

Hexachloroethane "19.0 1.0 20.0 ND 2570-130 9.9794.8

Bromomethane "28.7 0.50 20.0 ND 2530-163 5.19144

Chloromethane "21.1 0.50 20.0 ND 2569-149 12.8106

Dibromomethane "19.3 0.50 20.0 ND 2559-139 10.996.7

Methylene chloride "19.3 0.50 20.0 ND 2543-143 10.096.4

Methyl ethyl ketone "44.3 1.0 40.0 ND 2562-126 9.41111

Methyl iodide "21.9 2.0 20.0 ND 3070-130 10.2110

Methyl tert-butyl ether "18.0 0.50 20.0 ND 2555-144 6.8389.8

Methyl isobutyl ketone "38.5 1.0 40.0 ND 2566-127 8.0396.2

Naphthalene "17.8 0.50 20.0 ND 2552-157 7.3489.2

Styrene "22.0 0.50 20.0 ND 2551-157 11.4110

Tert-amyl methyl ether "17.9 0.50 20.0 ND 2541-136 7.2189.6

Tert-butyl alcohol "359 10 400 ND 2538-175 5.8489.7

1,1,1,2-Tetrachloroethane "19.5 0.50 20.0 ND 2558-146 11.097.7

1,1,2,2-Tetrachloroethane "18.8 0.50 20.0 ND 2573-127 11.394.0

Tetrachloroethene "22.4 0.50 20.0 ND 2549-148 11.7112

Toluene "19.9 0.30 20.0 ND 2559-147 11.199.6

1,2,4-Trichlorobenzene "21.8 0.50 20.0 ND 2550-150 4.04109

1,1,1-Trichloroethane "21.8 0.50 20.0 ND 2562-144 7.75109

1,1,2-Trichloroethane "19.4 0.50 20.0 ND 2562-129 12.297.2

Trichloroethene "21.0 0.50 20.0 ND 2558-140 9.89105

Trichlorofluoromethane "20.2 0.50 20.0 ND 2556-144 12.6101



Bruce L. Gove

Laboratory Director

6/25/2012

Page 32 of 34

Project:

Project Number:

Project Manager:

06/25/12 09:52

Haling & Associates





Reported:

Result MDL Limit

Reporting

Units Level

Spike

Result

Source

%REC

%REC

Limits RPD

RPD

Limit Notes Analyte





1,2,3-Trichloropropane ug/l19.1 0.50 20.0 ND 2561-139 10.995.4

Vinyl acetate "46.6 1.0 40.0 ND 2570-130 6.55117

Vinyl chloride "23.6 0.50 20.0 ND 2553-160 23.0118

m,p-Xylene "42.0 0.50 40.0 ND 2553-147 11.5105

o-Xylene "21.6 0.50 20.0 ND 2555-148 10.4108

Xylenes (total) "63.6 0.50 60.0 ND 2549-153 11.1106






Bruce L. Gove

Laboratory Director

6/25/2012

Page 33 of 34

Project:

Project Number:

Project Manager:

06/25/12 09:52

Haling & Associates





Reported:

Notes and Definitions

QM-4X The spike recovery was outside of QC acceptance limits for the MS and/or MSD due to analyte concentration at 4 times or greater the

spike concentration. The QC batch was accepted based on LCS and/or LCSD recoveries within the acceptance limits.

T-6 Sample analyzed outside of recommended holding time.

Sample results reported on a dry weight basis

Relative Percent DifferenceRPD

dry

Not ReportedNR

Analyte NOT DETECTED at or above the reporting limitND

Analyte DETECTEDDET



Bruce L. Gove

Laboratory Director

6/25/2012

Page 34 of 34

Documents

MONITORING REPORT, FIRST SEMESTER 2012, EVANS ROAD