ARSENIC SAMPLING IN SOIL - Records CollectionsArsenic Sampling in Soil Former Police Station Property vMilford, NH July 10, 2014 vProject No. J1137185 Responsive v Resourceful Reliable

ARSENIC SAMPLING IN SOIL Former Police Station Property

Milford, New Hampshire

July 10, 2014 Terracon Project Number J1137185

Prepared for: Town of Milford


Prepared by: Terracon Consultants, Inc.

Manchester, New Hampshire

July 10, 2014

Town of Milford 1 Union Square Milford, New Hampshire 03055-4240

Attn: William Parker, Community Development Director M: (603) 249-0620 E: [email protected]

Re: Arsenic Sampling in Soil Former Police Station Property 589 Elm Street, Milford, NH NHDES Site #199205036 Terracon Project J1137185

Dear Mr. Parker:

lrerracan

Terracon Consultants, Inc. (Terracon) is pleased to present this report on recently conducted sampling and evaluation of shallow soil arsenic concentrations at the former police station property (589 Elm Street) in Milford, New Hampshire

Terracon appreciates this opportunity to provide environmental consulting services to the Town of Milford. Should you have questions or require additional information, please do not hesitate to contact our office.

Sincerely, Terracon Consultants, Inc.

W. James Griswold, P.G. Project Manager

cc Robin Mongeon, NHDES Richard Hull, USEPA

Principal

Terracon Consu ltants, Inc. 77 Sundial Ave. Suite 401W Manchester, New Hampshire 03103

P (603) 647 9700 F (603) 647 4432 terracon.com

En vHonmen tal 8 facil iti es • Ge otechni c a l • Ma te r ia b

TABLE OF CONTENTS

Responsive Resourceful Reliable i

EXECUTIVE SUMMARY .................................................................................................1 1.0 BACKGROUND INFORMATION ....................................................................................1 2.0 SAMPLING PROCEDURES ...........................................................................................2 3.0 DATA EVALUATION ......................................................................................................3 4.0

4.1 Sampling Results............................................................................................................ 3 4.2 Background Level Evaluation.......................................................................................... 3 4.3 Refined Conceptual Model .............................................................................................. 4

RECOMMENDATIONS ...................................................................................................5 5.0 REFERENCES ................................................................................................................6 6.0

APPENDIX A – EXHIBITS Exhibit A-1 Site Locus and Sampling Location Map Exhibit A-2 Site Arsenic Sampling Concentrations Exhibit A-3 Area Arsenic Concentrations Exhibit A-4 Milford Area Bedrock Geology and Souhegan River Map APPENDIX B – TABLES Table 1 Arsenic Sampling Results, June 2014 Table 2 Historic Arsenic Sampling Results APPENDIX C – LABORATORY DATA SHEETS APPENDIX D – VARIOGRAM RESULTS

Arsenic Sampling in Soil Former Police Station Property Milford, NH July 10, 2014 Project No. J1137185

Responsive Resourceful Reliable 1

EXECUTIVE SUMMARY 1.0

Sampling for arsenic levels in shallow soil at the former police station property in Milford was undertaken on June 19, 2014 in accordance with the Scope of Work approved by regulatory authorities on June 10, 2014. Twelve (12) samples were obtained, 10 from surface soils and 2 from depth (1 and 2 feet). Evaluation of the arsenic concentrations along with those from samples from recent (2010) investigation at the site shows a relatively uniform distribution, both vertically and areally. Additionally, all concentrations fell largely above regulatory thresholds – no samples obtained at the site fell below either the EPA Residential or Industrial Remedial Screening Levels (RSLs) while slightly less than half the samples were below NHDES Soil Remediation Standard (SRS). Evaluation of areally-extensive legacy data of arsenic concentrations, sampled as part of the Savage Well Superfund site investigation in 1989, shows that the levels of arsenic found at the former police station property compared to samples from a 98 acre area around the subject site are remarkably similar. The data show strong spatial uniformity with little evidence of a discrete, anthropogenic source. Moreover, examination of the area bedrock geology reveals several formations with moderate to high levels of arsenic-bearing minerals. The Souhegan River and its tributaries have eroded and transported these materials over geologic time to create the alluvial valley fill and associated arsenic distribution found in soils in this area of Milford today. While the likely source of arsenic in soils is naturally-occurring upstream source rock, the levels found at the former police station site nevertheless pose human health risk based on EPA and NHDES exposure thresholds. Terracon recommends that the exposure pathway be eliminated when redevelopment occurs via creative capping approaches including paving, the use of building footprint and landscaping.

BACKGROUND INFORMATION 2.0 The former police station property at 589 Elm Street in Milford (Appendix A, Exhibit A-1) contains an existing empty building, paved parking areas, a ball field and some wooded areas. Historically the property has been used to house a motel, offices, a waste casting storage area and a bulk oil facility. The property lies within Operating Unit 1 of the Savage Well Superfund site, abuts the Superfund source area and contains infrastructure associated with the ongoing remediation at Savage Well. The Town currently owns the property and has been cooperating with the New Hampshire Department of Environmental Services (NHDES) and the United States Environmental



Protection Agency (EPA) in granting access to the property to facilitate remedial action for the Savage Well site. The Town desires to see the property redeveloped to productive use and to serve as a gateway property for further development in that area of Milford. Conversations with the NHDES and EPA about redevelopment of the property have identified several issues that need to be resolved before redevelopment can meaningfully proceed. This report addresses one of those issues pertaining to concentrations and the spatial distribution of arsenic in shallow soil on the property. A Scope of Work was developed and submitted for review and approval by the NHDES and EPA on May 28, 2014. Approval for the Scope of Work was given on June 10, 2014.

SAMPLING PROCEDURES 3.0 Terracon staff sampled shallow soils at the site on June 19, 2014. Sample locations were determined using a Trimble Juno 3 GPS unit as well as via taping from known locations that could be discerned from aerial images. Locational data were downloaded to the existing GIS database for plotting. Staff obtained shallow soil samples from 0.5 to 2 inches below ground surface with a hand trowel from 10 locations (Exhibit A-1). In addition, 2 samples were obtain with a hand auger from depth, one from 1 foot deep (TER8), the other from 2 feet deep (TER5). Site soils consisted of loams, sands and gravels as described in the table below.

Sample Location Soil Description TER1_Surface Sandy loam

TER2_Surface Sandy loam



TER5_Surface Loam

TER5_2.0 Medium sand, poorly sorted, brown


TER7_Surface Medium, poorly sorted sand, grey, fill

TER8_Surface Sand with gravel

TER8_1.0 Gravel, brown, well sorted

TER9_Surface Gravely loam


Samples were delivered under Chain of Custody to Eastern Analytical, Inc. of Concord, New Hampshire for analysis. Tabulated analytical results are presented in Appendix B, Table 1, along with relevant regulatory standards (EPA’s Residential and Industrial Remedial Screening



Levels (RSLs) and NHDES’s Soil Remediation Standard (SRS)). Laboratory data sheets are found in Appendix C.

DATA EVALUATION 4.0 4.1 Sampling Results Exhibit A-1 illustrates the locations of the current onsite sampling as well as recent (2010) sampling performed for the Town by Credere Associates, LLC. Terracon’s sampling scheme involved a grid-like pattern across the site to provide spatially extensive sample results. The 2010 Credere samples, clustered toward Elm Street and the former police station building, added to that coverage. Exhibit A-2 provides a posting map of the arsenic concentrations using indicator colors at the site including the 12 samples taken by Terracon as well as 11 samples previously sampled by Credere (Appendix B, Table 2). The posted data show that no samples at the site fell below either the EPA Residential or Industrial RSLs. Somewhat less than half the samples (9 of 23) had concentrations less than the NHDES SRS threshold. There appears to be a high degree of spatial uniformity in the site data, both areally and vertically. Vertically, there is effectively no difference among surface versus deep samples. In addition to the two samples taken at 1 and 2 feet deep by Terracon, a number of the samples taken in 2010 were taken at depth (Table 2), in some cases as much as 10 and 12 feet below ground surface. However, the average value of deep versus shallow samples was virtually identical: 11.1 mg/kg (deep) in comparison to 10.7 mg/kg (surficial). Areally, sample results show scant evidence of trends. Rather, the data depict a spatially even distribution. The highest concentration detected (17 mg/kg) occurs on the eastern side of the property, adjacent to sample concentration results ranging from about 9 to 11 mg/kg. At the farthest northeastern portion of the property (Sample TER1), arsenic was detected at 13 mg/kg. At the opposite corner to the southwest, a surface sample (CA-1) contained 14 mg/kg arsenic. Surficial concentrations in the center of the property (TER5) were 12 mg/kg. 4.2 Background Level Evaluation Based on the results from site sampling showing notable spatial uniformity of concentrations, a reasonable question arises regarding whether such concentrations represent background arsenic levels. To evaluate this possibility, Terracon obtained data from a 1989 HMM Phase II report contained in the 1991 Remedial Investigation for the Savage Well Superfund site. HMM sampled for arsenic at 20 locations scattered throughout this area of Milford. Terracon georeferenced the sample locations and posted the arsenic data.



Exhibit A-3 depicts the HMM data points along with the recent Terracon and 2010 Credere results. The exhibit, along with data from Table 2, reveals several important specifics:

The area encompassed is relatively large. The former police station property constitutes 8.45 acres, but the area demarcated by the HMM sampling distribution is more than 10 times that size (98 acres).

The mean value of the arsenic data (excluding three outliers explained below) is 9.6 mg/kg with a standard deviation of 3.3 mg/kg. Most samples of arsenic in soil in this part of Milford, therefore, would likely fall between about 6 and 13 mg/kg.

Three samples clustered within the footprint of the Savage Well site along the

banks of the Souhegan River appear to be outliers with values of 93, 155 and 204 mg/kg. It is possible that these concentrations (an order of magnitude higher than all other results) are related to site operations or activities at Savage Well and do not reflect natural conditions.

All 42 samples taken in 1989, 2010 or 2014 were above the EPA Residential

RSL. All samples except one was above the Industrial RSL.

Slightly more than half the sample results (24 of 42) were below the NHDES SRS threshold of 11 mg/kg.

Based on the mapping depicted on Exhibit A-3, arsenic values show no discernable trends or patterns that might be associated with an anthropogenic source either on the subject site or off. Data from within active industrial complexes show concentrations similar to those taken from open grassy areas or from along brooks.

Other than the three outliers, the data set is remarkable for its spatial uniformity.

Appendix D provides a series of variogram plots (a geostatistical function describing the spatial correlation of observations or values) of all arsenic data evaluated with the exception of the three outliers from the HMM Savage Well study. Directional evaluation of the plots shows negligible spatial continuity that might indicate a nearby distinct source of arsenic.

4.3 Refined Conceptual Model Evaluation of arsenic data from the 1991 RI in concert with the more recent (2010 and 2014) sampling at the former police station site suggests that arsenic concentrations in soil in this area of Milford will likely fall within 6 to 13 mg/kg. The data show insignificant spatial differences



either vertically or areally over this 98-acre area of the town, leading to the conclusion that the arsenic levels represent natural background conditions. The source of the arsenic is probably not the bedrock geologic material underlying this area of Milford. The Massabesic Gneiss Complex possesses mineralogy that is notably lacking in arsenic-rich constituents. A 2003 USGS investigation on arsenic in groundwater, for example, found no wells drilled into the Massabesic Gneiss that contained arsenic concentrations over the 10 ug/L drinking water regulatory threshold. However, the geologic material that mantles this portion of Milford is alluvial valley fill from rock eroded and transported from a variety of bedrock formations upstream, not just the Massabesic Gneiss. Exhibit A-4 shows the site location superimposed on the State bedrock geology map as modified by the 2003 USGS study along with the trace of the Souhegan River and its main tributaries. The exhibit shows that the river system passes through several rock types noted in the 2003 USGS study as having moderate to high levels of arsenic. Examples of these formations include the Spaulding Tonalite (in yellow) and the Upper and Lower Rangely Formations (in red) (Exhibit A-4). Over geologic time, the valley of Milford has been filled with the product of erosion from these upstream source rocks. The erosion and deposition process dictated the spatial distribution while the mineralogy of the source rock dictated the levels of concentration of arsenic found in Milford soils today.

RECOMMENDATIONS 5.0 The arsenic levels found at the former police station property site represent background concentrations typically found in this area of Milford. The arsenic is not anthropogenically generated, and a requirement for remediation would be inconsistent if applied solely to this property among all others in this area of the Town. Nonetheless, such soils do fall above human health exposure risk levels, and redevelopment efforts should take that into consideration. Terracon makes the following recommendations with respect to future redevelopment plans:

Capping material such as paving or the use of a building footprint should be maximized over areas of elevated arsenic concentrations. This would be particularly important in portions of the property nearer Elm Street where surface concentrations consistently exceed NHDES SRS levels.

Cover landscaping in areas not capped by structures, concrete or asphalt should be considered, particularly if residential use of the site is considered. This might include cover soil for walkways and recreational areas.



If cut-and-fill is needed for redevelopment, the site civil engineer and architect should strongly consider on-site reuse. This would be particularly important for construction activity in areas toward the Souhegan River to minimize changes to the floodplain.

REFERENCES 6.0

1. Credere Associates, LLC. January 24, 2011. Phase II – Environmental Site Assessment, Rev. 1, Old Police Station Property, 559 Elm Street, Milford, New Hampshire

2. HMM Associates, Inc. August 8, 1989. Subtask 2H – Letter Report, Soil Boring/Soil

Gas Program Phase II-A.

3. HMM Associates, Inc. June, 1991. Remedial Investigation, Savage Municipal Water Supply Site, Milford, New Hampshire

4. Montgomery, D.L., J.D. Ayotte, P.R. Carroll and P. Hamlin. July, 2003. Arsenic

Concentrations in Private Bedrock Wells in Southeastern New Hampshire. USGS Fact Sheet 051-03

APPENDIX A

EXHIBITS

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CA-8

CA-7

CA-6

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CA-4CA-3

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PH. (603) 647-9700 FAX (603) 647-4432

77 Sundial Ave., St. 401W Manchester, NH 03103

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DATA SOURCES:Topo - ArcGIS online USA Topo Map services (via USGS)Imagery - ESRI

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LegendTerracon Soil Sample Location (2014)

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CA-715

CA-512 & 10

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CA-212 & 11

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PH. (603) 647-9700 FAX (603) 647-4432

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SITE ARSENIC SAMPLING CONCENTRATIONS

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DATA SOURCES:Imagery - ESRINHDES SRS - September 2008EPA Region IX RSL - May 2014

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DATA SOURCES:Imagery - ESRIEPA Region IX RSL - May 2014

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Credere 2010 Sample Location") At or Above Industrial RSL

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MILFORD AREA BEDROCK GEOLOGY AND SOUHEGAN RIVER MAPARSENIC SAMPLING IN SOIL

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DATA SOURCES:GRANIT - Bedrock and hydrography dataArsenic Data - "Arsenic Concentrations in Private Bedrock Wells in Southeastern New Hampshire", USGS (2003)

0 6,500 13,0003,250Feet

Legend_̂ Site location

Souhegan River

Tributaries

Souhegan Watershed Districts

Arsenic in BedrockLow (e.g. Gray biotite granite & Massabesic gneiss)

Moderate (e.g. Spaulding Tonalite & Perry Mt. Frm.)

High (e.g. Lower and Upper Rangeley Frm.)

APPENDIX B

TABLES

of 1

Sample ID: TER1 TER2 TER3 TER4 TER5 TER5 TER6 TER7 TER8 TER8Sample Date: 6/19/2014 6/19/2014 6/19/2014 6/19/2014 6/19/2014 6/19/2014 6/19/2014 6/19/2014 6/19/2014 6/19/2014Depth (ft bgs): Surface Surface Surface Surface Surface 2 Surface Surface Surface 1

Lab ID: 132830.12 132830.11 132830.1 132830.06 132830.07 132830.08 132830.09 132830.04 132830.02 132830.03Arsenic 13 9.2 6.5 9.3 9.8 12 7 17 11 11

Sample ID: TER9 TER10Sample Date: 6/19/2014 6/19/2014Depth (ft bgs): Surface Surface

Lab ID: 132830.01 132830.05Arsenic 9.1 9.6

NOTES:1. Analyte concentration or detection limit exceeds EPA Regional Screening Levels or NHDES Soil Remediation Standard for:

NHDES Soil Remediation Standard (SRS) 11EPA Industrial exposure (IRSL) 3

EPA Residential exposure (RRSL) 0.67

PARAMETER

PARAMETER

TABLE 1 ARSENIC SAMPLING RESULTS, JUNE 2014

Arsenic Sampling in Soil Former Police Station Property


of 1

Sample ID: B-11 B-12 B-13 B-14 B-16 B-20 B-36 B-40 B-40A B-4BSample Date: May-89 May-89 May-89 May-89 May-89 May-89 May-89 May-89 May-89 May-89Depth (ft bgs): 1-3 2-4 3-5 0-2.5 2-4 0-3 0-3 4-6 4-6 2.5-5

Lab ID: NA NA NA NA NA NA NA NA NA NAArsenic 7.71 4.39 12.3 7.01 7.21 6.92 13 5.52 5.83 155

Sample ID: B-7 B-8 MW-18 PA-10 SS-G1 SS-G2 TP-1 TP-3 TP-5 TP-7Sample Date: May-89 May-89 May-89 May-89 May-89 May-89 May-89 May-89 May-89 May-89Depth (ft bgs): 2.5-5 0-2 1-2 1-3 Surface Surface 1 2-3 1.5 7-7.5

Lab ID: NA NA NA NA NA NA NA NA NA NAArsenic 7.6 8.97 15 12.4 204 7.53 2.25 93 5.56 3.38

Sample ID: CA-1 CA-1 CA-2 CA-2 CA-3 CA-4 CA-5 CA-5 CA-6 CA-7 CA-8Sample Date: Jun-00 Jun-00 Jun-00 Jun-00 Jun-00 Jun-00 Jun-00 Jun-00 Jun-00 Jun-00 Jun-00Depth (ft bgs): 0-2 8-10 0-2 2-4 4-6 4-6 0-2 4-6 8-10 10-12 6-8

Lab ID: NA NA NA NA NA NA NA NA NA NA NAArsenic 14 7.8 12 11 11 13 12 10 9.9 15 10

NOTES:1. Analyte concentration or detection limit exceeds EPA Regional Screening Levels or NHDES Soil Remediation Standard for:

NHDES Soil Remediation Standard (SRS) 11EPA Industrial exposure (IRSL) 3

EPA Residential exposure (RRSL) 0.67

2. 1989 data are from HMM Associates, Inc., Savage Well Remedial Investigation. 2010 data are from Credere Associates, LLC Phase II (rev)

PARAMETER

TABLE 2 HISTORIC ARSENIC SAMPLING RESULTS

Arsenic Sampling in Soil Former Police Station Property


PARAMETER

PARAMETER

APPENDIX C

LABORATORY DATA SHEETS

Eastern Analytical, Inc.

. services Pror. . & dri\\1\"l'&

esstonal laboratorY

James Griswold

Terracon

77 Sundial Ave., Suite 401W

Manchester, NH 03103

Subject: Laboratory Report

Eastern Analytical, Inc. ID: 132830

Client Identification: Milford, 586 Elm 1 J 1137185

Date Received: 6/20/2014

Dear Mr. Griswold :

Enclosed please find the laboratory report for the above identified project. All analyses were performed in accordance with our QA/QC Program. Unless otherwise stated, holding times, preservation techniques, container types, and sample conditions adhered to EPA Protocol. Samples which were collected by Eastern Analytical, Inc. (EAI) were collected in accordance with approved EPA procedures. Eastern Analytical, Inc. certifies that the enclosed test results meet all requirements of NELAP and other applicable state certifications. Please refer to our website at www.eailabs.com for a copy of our NELAP certificate and accredited parameters.

The following standard abbreviations and conventions apply to all EAI reports: Solid samples are reported on a dry weight basis, unless otherwise noted < : "less than" followed by the reporting limit > : "greater than" followed by the reporting limit %R:% Recovery

Eastern Analytical Inc. maintains certification in the following states: Connecticut (PH-0492), Maine (NH005), Massachusetts (M-NH005), New Hampshire/NELAP (1012), Rhode Island (269) and Vermont (VT1012).

The following information is contained within this report: Sample Conditions summary, Analytical Results/Data, Quality Control data (if requested) and copies of the Chain of Custody. This report may not be reproduced except in full, without the the written approval of the laboratory.

If you have any questions regarding the results contained within, please feel free to directly contact me or the chemist(s) who performed the testing in question. Unless otherwise requested, we will dispose of the sample(s) 30 days from the sample receipt date.

We appreciate this opportunity to be of service and look forward to your continued patronage.

Sincerely,

~SWu£: Lorraine Olashaw, Lab Director Date #of pages (excluding cover letter)

25 Chenell Drive I Concord, NH 0330 I I 800.287.0525 I www.eailabs.com

SAMPLE CONDITIONS PAGE

EAI I D#: 132830

Client: Terracon

Client Designation: Milford, 586 Elm 1 J1137185

Temperature upon receipt (°C): 20.8 Received on ice or cold packs (Yes/No): N Acceptable temperature range ('C): 0-6

Date Date Sample% Dry LabiD Sample ID Received Sampled Matrix Weight Exceptions/Comments (other than thermal preservation)

132830.01 Ter9_Surface 6/20/14 6/19/14 soil 95.9 Adheres to Sample Acceptance Policy


132830.03 Ter8_1.0 6/20/14 6/19/14 soil 97.8 Adheres to Sample Acceptance Policy

132830.04 Ter7 _Surface 6/20/14 6/19/14 soil 88.3 Adheres to Sample Acceptance Policy

132830.05 Ter1 O_Surface 6/20/14 6/19/14 soil 89.1 Adheres to Sample Acceptance Policy



132830.08 Ter5_2.0 6/20/14 6/19/14 soil 90.1 Adheres to Sample Acceptance Policy





Samples were properly preseNed and the pH measured when applicable unless otherwise noted. Analysis of solids for pH, Flashpoint, /gnitibility, Paint Filter, Corrosivity, Conductivity and Specific Gravity are reported on an "as received" basis. Immediate analyses, pH, Total Residual Chlorine, Dissolved Oxygen and Sulfite, performed at the laboratory were run outside of the recommended 15 minute hold time.

All results contained in this report relate only to the above listed samples.

References include: 1) EPA 600/4-79-020, 1983 2) Standard Methods for Examination of Water and Wastewater, 20th Edition, 1998 and 22nd Edition, 2012 3) Test Methods for Evaluating Solid Waste SW 846 3rd Edition including updates IVA and /VB 4) Hach Water Analysis Handbook, 2nd edition, 1992

Eastern Analytical, Inc. www.eailabs.com 1 800.287.0525 1 [email protected] 1

LABORATORY REPORT

EAIID#: 132830

Client: Terracon


Sample ID: Ter9_Surtace Ter8_Surtace Ter8_1.0 Ter7 _surtace

Lab Sample ID: 132830.01 132830.02 132830.03 132830.04

Matrix: soil soil soil soil

Date Sampled: 6/19/14 6/19/14 6/19/14 6/19/14 Analytical Date of

Date Received: 6/20/14 6/20/14 6/20/14 6/20/14 Matrix Units Analysis Method Analyst

Arsenic 9.1 11 11 17 SoiTotDry mg/kg 6/24/14 6020 OS

Sample ID: Ter1 O_Surtace Ter4_Surtace Ter5_Surtace Ter5_2.0

Lab Sample ID: 132830.05 132830.06 132830.07 132830.08




Arsenic 9.6 9.3 9.8 12 SoiTotDry mg/kg 6/24/14 6020 DS

Eastern Analytical, Inc. www.eailabs.com 1800.287.05251 [email protected] 2

LABORATORY REPORT

EAIID#: 132830

Client: Terracon


Sample ID: Ter6_Surface Ter3_Surface Ter2_Surface Ter1_Surface

Lab Sample ID: 132830.09 132830.1 132830.11 132830.12




Arsenic 7.0 6.5 9.2 13 SalTatOry mg/kg 6/24/14 6020 OS

Eastern Analytical, Inc. www.eailabs.com I 800.287.0525 1 [email protected] 3

QC REPORT

EAIID#: 132830 Client: Terra con


Date of Parameter Name Blank LCS LCSD Units Analysis Limits RPD Method

Arsenic < 0.5 39 (97 %R) mg/kg 6/24/14 80- 120 20 6020

MS/MSD MS/MSD Date of Parameter Name Parent ID Parent Matrix Spike MSD Units Analysis Limits RPD Method

Arsenic 132830.12 13 1000 (100 %R) 990 (99 %R) (1 RPD) mg/kg 6/24/14 75-125 20

Samples were analyzed within holding times unless noted on the sample results page. Instrumentation was calibrated in accordance with the method requirements. The method blanks were free of contamination at the reporting limits. The associated matrix spikes and/or Laboratory Control Samples met the above stated criteria. Exceptions to the above statements are flagged or noted above or on the QC Narrative page. */! Flagged analyte recoveries deviated from the QA/QC limits.

Eastern Analytical, Inc. www.eailabs.com I 800.287.0525 1 [email protected]

6020

4

CHAIN-OFPCUSTODY RECORD Page _·_a_ of ~

BoLD fiELDs REQUIRED. PLEASE CnRcLE REQUESTED ANALYSIS.

SAMPLING

DATE/TIME Ul

*IF CoMPOSITE, w ~

INDICATE BoTH

SAMPLE I.D. START & FINISH DATE/TIME

• Na-NaOH· M-MEOH ·

PROJECT MANAGER: -:y, lY\ c (' IS\.tJO k! COMPANY: ,.._e ~~CO'(\ ADDREss: '1- =1- s.; n c:l. A=L Ave CITY:~~~ STATE: Nit l1P03I03 PHONE:-Gog- '*06- 1/q~ EXT.: ___ _ fAX: tQO :3 - ft;,JJ ~- 'iL/:3 'Z. E-MAil:

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132830 =u:,- . Page 2.. of -z_ CHAINuOf-CUSTOilJ.lV RECORD

BoLo fiELDS REQUIRED. PLEASE CIRCLE REQUJESTIEID ANALYSIS.

- voc svoc TCLP METALS INORGANICS Ml SAMPLING

DATEITtME

*IF CoMPOSITE, INDICATE BoTH

SAMPLE I.D. START & FINISH DATE/TIME

• Na-NaOH· M-MEOH

PRoJECT MANAGER: J. m Gr1s too lL COMPANY: Je,-r-~O"V1 . ADDREss: -=l-~ Suf\d, s-.L 19v ..e.

~ ~ 0 ..J w al w 1!.1

~

em: ~c...h.Q..s"\er STATE: N H- ztP: o3J o3 PHONE: (;,o&_S- 2.0(;- f/gg- EXT.: __ _ FAX: fDO 3 - " .C, ~ - 'f J..f 3 "2_ E-MAic tv .1 v-1 s: We:> I c! @ l21"i'1'lccxl • eo m SITE NAME: fY\1/.itJ_rd:) St\Z~ r;;k_~ PROjECT #: J' U I 3 3- ( g-_5 STATE:

APPENDIX D

VARIOGRAM RESULTS

VARIOGRAM EVALUATIONARSENIC SOIL DATA

MILFORD, NEW HAMPSHIRE

Direction: 0.0 Tolerance: 35.0Milford Data: No Outliers

0 100 200 300 400 500 600 700 800 900 1000

Lag Distance

0

5

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Vario

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0 100 200 300 400 500 600 700 800 900 1000

Lag Distance

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0 100 200 300 400 500 600 700 800 900 1000

Lag Distance

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0 100 200 300 400 500 600 700 800 900 1000

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Variance

Variance Variance

Variance


0 100 200 300 400 500 600 700 800 900 1000

Lag Distance

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Vario

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Variance

Tables 1 & 2 D2.pdfTable 1Tables 1 & 2 D2.pdfTable 2

Variograms.pdfVariograms

barcode: *536301*barcodetext: SDMS Doc ID 536301

Documents

ARSENIC SAMPLING IN SOIL - Records CollectionsArsenic Sampling in Soil Former Police Station Property vMilford, NH July 10, 2014 vProject No. J1137185 Responsive v Resourceful Reliable