DES Waste Management Division 

29 Hazen Drive; PO Box 95 

Concord, NH 03302-0095 

2011 Annual Summary Report 

Groundwater Monitoring Program 

Town Garage/Radio Beacon Site 

Londonderry, New Hampshire 

NHDES Site #: 198509001 

Project Type: Superfund (CERCLA) 

Project Number: 0003569 

Prepared For: 

Town of Londonderry, New Hampshire 

c/o Sherilyn B. Young, Esq. 

Rath, Young and Pignatelli, P.A. 

PO Box 1500 

Concord, NH 03302-1500 

Prepared By: 

Sanborn, Head & Associates, Inc. 

20 Foundry Street 

Concord, NH 03301 

Phone Number: (603) 229-1900 

Contact Name: Timothy M. White, P.G. 

ntact Email: twhite@sanbornhead.com 

Date of Report: (January 27, 2012) 
Groundwater Monitoring Report Cover Sheet

Site Name: Town Garage/Radio Beacon Site 

Town: Londonderry 

Permit #: GWP-198509001-L-003

Type of Submittal (Check all that apply)

 Periodic Summary Report (year): 2011 

 Data Submittal (month and year per Condition #7 of Permit): November 2011 

Check each box where the answer to any of the following questions is “YES”

Sampling Results

 During the most recent monitoring event, were any new compounds detected at any 

sampling point? 

Well/Compound:

 Are there any detections of contamination in drinking water that is untreated prior to 

use?

Well/Compound:

 Do compounds detected exceed AGQS? 

 Was free product detected for the first time in any monitoring point? 

 Surface Water (visible sheen)

 Groundwater (1/8” or greater thickness)

Location/Thickness: 

Contaminant Trends

 Do sampling results show an increasing concentration trend in any source area 

monitoring well? 

Well/Compound:

 Do sampling results indicate an AGQS violation in any of the GMZ boundary wells? 

Well/Compound:

Recommendations

 Does the report include any recommendations requiring DES action? (Do not check this 

box if the only recommendation is to continue with existing permit conditions.)

This form is to be completed for groundwater monitoring data submittals and periodic summary reports 

submitted to the New Hampshire Department of Environmental Services Waste Management Division. 
2011 Annual Summary Report

Groundwater Monitoring Program

Town Garage/Radio Beacon Site

Londonderry, New Hampshire

NHDES Site No. 198509001

Prepared for Town of Londonderry, New Hampshire

File No. 2049.03

January 2012
ǤǡǤ

ǡǡǤǤ

ǤǤͳͷͲͲ

ǡͲ͵͵ͲʹǦͳͷͲͲ


ʹ͹ǡʹͲͳʹ

	ǤʹͲͶͻǤͲ͵

ǣ ʹͲͳͳȂ



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ͳǡͶǦȋȌȋǤǤǡǡǡǡ

ǡȌǤǤ

GROUNDWATER SAMPLING AND ANALYSIS


       Ǧʹǡ  Ǧ

Ǧ͸ ȋʹͶȌʹʹǡʹͲͳͳȋ 	ͳ 

ȌǤȀǦʹǡ

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        ͳʹǡ ʹͲͳͳ  ǡ  Ǧ͸Ǧʹ  Ǧ͸ǦͶ

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ȋͳͻͻ͸ʹͲͲͷȌǡȋǤǤǡǡ

ǡȀȌǤ
January 27, 2012  Page 2

20120127_2011_Annual_Rpt.docx  2049.03

  Ǥ Ǧ    ǡ   

ǯʹͲͲͻȋȌǤ


      Ǧ͸Ǧʹ  Ǧ͸ǦͶ  

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  ȋȌǡ    ȋȌ    

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       ʹͲͳͳǤ   

  ͳǡͶǦ   ȋȌ  ȋǤǤǡ ǡ ǡ ǡ

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ͲǤʹͷȋρȀȌͳǡͶǦʹͲͳͳ

ͳͻǡʹͲͳͳ

       ǯ ȋǯȌ 

Ǥ


       Ǧ  

ǣ

 VOCsǣ ͶͲǦ ȋȌ    ̺ ǡ Ǧ 

ȋȌǢ

 1,4ǦdioxaneǣͶͲǦ̺ǡǦǢ

 MetalsǣʹͲͲǦǡǦȋ͵ȌǤ

	 ǡ           

ǡǤȋȌǡǡ

ǡǣ ͅʹ͸ͲǢͳǡͶǦ

 ͅʹ͸Ͳ  ȋȌǢ

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 ͅʹ͸ͲͳǡͶǦ ͅʹ͸ͲǤǯ

            Ǥ
January 27, 2012  Page 3

20120127_2011_Annual_Rpt.docx  2049.03

            

ǯʹͲͲͻȋȌǤ

SUMMARY OF ANALYTICAL RESULTS

ǡ

ȋ ȌǤ    ǡ        

ȋǤǤǡȌǤ

ʹͲͳͳǣ

 ͳǡͳǦȋͳǡͳǦȌǡͳǡͳǦȋͳǡͳǦȌǡͳǡͶǦ 

ǦʹǤͳǡͳǦȋ͹ρȀȌ

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   ȋ
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 Ȍ        ȋ ͅͳ ρȀȌǤ 

  ȋʹρȀ Ȍ

     ȋͳǡͲͲͲ ρȀȌǤ    ͳǡͶǦ

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 ȋ͵ ρȀȌǡ     ǯ ͳͲǦ͸    

ǤǦ͸ǦʹǢʹͳͲρȀ

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ȋʹǡͲͲͲρȀȌǤ

            Ǧ͸ǦͶ  

 ȋʹ ρȀȌ  ȋͳǡͲͲͲ ρȀȌǤ

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ȋʹǡͲͲͲρȀȌǤ



͵ ǤʹͲͳͲǤͳǡͶǦǡ

ȋȌǤȀ͸͵ͷȀǦͲͻȀͲͲͷǦ	ǤʹͲͳͲǤ
Sanborn

, Head 

and 

Associat

es, Inc.

Digitally signed by 

Sanborn, Head and 

Associates, Inc. 

DN: cn=Sanborn, 

Head and Associates, 

Inc., o=Sanborn, 

Head & Associates, 

Inc., ou=SHA, 

email=lsmith@sanbo

rnhead.com, c=US 

Date: 2012.01.31 

15:51:42 -05'00'
January 27, 2012  Page 5

20120127_2011_Annual_Rpt.docx  2049.03

ȀȀǣȀ

Ǥ ͳ

	ͳǦ͵

Ȃ

Ȃ
		

Ȃ

ȂȀ

ǣ̳̳ʹͲͲͲ̳ʹͲͶͻǤͲ͵̳	̳ʹͲͳͳ̳ʹͲͳʹͲͳʹ͹̴ʹͲͳͳ̴̴Ǥ
TABLES

 
TABLE 1

Summary of VOCs and Chloride Analytical Data - Monitoring Wells

Town Garage / Radio Beacon Site

Londonderry, New Hampshire

NHDES Site No. 198509001

Monitoring Well

Location

Chloride

(mg/l)

1,1-DCA

(μg/l)

1,1-DCE

(μg/l)

1,1,1-TCA

(μg/l) 

 Other VOCs

(μg/l)

Cleanup Levels 250 mg/l 81 μg/l 7 μg/l 200 μg/l

6/3/1994 10,900 100 37 300

12/6/1994 12,410 100 48 360

4/20/1995 11,530 120 58 280

10/12/1995 9,000 120 62 320

5/1/1996 11,300 150 86 360 6.9 - Chloroethane

11/27/1996 NS 110 50 240

11/20/1997 NS 100 64 160 1 - Toluene

11/10/1998 NS 110 58 150 1 - Toluene

7 - Chloroethane

11/23/1999 NS 86 40 85 8 - Chloroethane

11/21/2000 NS 120 48 56 13 - Chloroethane

11/19/2001 NS 100 48 52 17 - Chloroethane

11/15/2002 NS 57 28 28 7 - Chloroethane

11/4/2003 NS 57 28 19 10 - Chloroethane

11/4/2004 NS 46 18 11 7 - Chloroethane

11/29/2005 NS 36 18 8 5 - Chloroethane

11/13/2006 NS 33 18 7 5 - Chloroethane

12/11/2006 NS 36 21 8 6 - Chloroethane

11/9/2007 NS 21 14 3

11/6/2008 NS 17 9 BDL

5/19/2010 NS 11 7 BDL

05/19/10 Dup. NS 11 7 BDL

11/22/2011 NS 7 3 BDL 0.44 - 1,4-Dioxane

MW-6D* 11/1/1990 NS 13 6 BDL

6/2/1994 NS 6.6 2.5 BDL

3.80 - THM

7.50 - Toluene

340 - MEK

150 - Acetone

5/9/1996 8,480 16 2.2 BDL

7.8 - Carbon disulfide

40 - MEK

25 - Toluene

6/2/1994 8,800 11 7 BDL 1.50 - Toluene

12/1/1994 9,050 13 7.1 BDL

4/20/1995 8,714 10 6.3 BDL 1.10 - MTBE

1.80 - Toluene

10/10/1995 9,300 12 6.1 BDL 2.3 - MTBE

5/9/1996 7,350 11 6.8 BDL 2.6 - Toluene

11/26/1996 NS 10 5 BDL

11/20/1997 NS 12 8 BDL 1 - Toluene

11/9/1998 NS 10 6 BDL 2 - Toluene

11/22/1999 NS 9 4 BDL 1 - Toluene

11/17/2000 NS 11 4 BDL

11/19/2001 NS 11 5 BDL 1 - Toluene

11/14/2002 NS 13 5 BDL 1 - Toluene

11/5/2003 NS 9 3 BDL 2 - Toluene

11/3/2004 NS 8 2 BDL 1 - Toluene

11/28/2005 NS 6 1 BDL 1 - Toluene

11/22/2011 NS 3 BDL BDL 2 - Toluene

0.34 - 1,4-Dioxane

11/22/11 Dup. NS 3 BDL BDL 2 - Toluene

0.35 - 1,4-Dioxane

MW-6D Location (monitoring well not sampled as part of GMP)

MW-6D-1

Date

MW-2D/2R Location (GMP sampling location)

MW-2D-6

MW-6D-2

MW-2R

Installed 10/30/06

S:\CONDATA\2000s\2049.03\Source Files\2011 Annual Report\LTG Tables.xlsx Page 1 of 8 Sanborn, Head & Associates, Inc.
TABLE 1

Summary of VOCs and Chloride Analytical Data - Monitoring Wells

Town Garage / Radio Beacon Site

Londonderry, New Hampshire

NHDES Site No. 198509001

Monitoring Well

Location

Chloride

(mg/l)

1,1-DCA

(μg/l)

1,1-DCE

(μg/l)

1,1,1-TCA

(μg/l) 

 Other VOCs

(μg/l)

Cleanup Levels 250 mg/l 81 μg/l 7 μg/l 200 μg/l

Date

6/2/1994 2,200 3.2 1.5 BDL

12/1/1994 1,860 3.6 1.7 BDL 1.50 - Toluene

4/20/1995 2,379 3 1.4 BDL 1.50 - Toluene

10/10/1995 7,850 14 6.3 BDL 2.40 - MTBE

5/9/1996 1,570 2.6 BDL BDL

6/2/1994 3,800 5.2 BDL BDL 2.60 - 1,2 DCA

12/1/1994 4,590 8.5 3.4 BDL

4/20/1995 3,621 5 2.1 BDL

10/10/1995 7,410 18 6.6 4.5 1.40 - MTBE

5/9/1996 2,210 3.5 2.1 BDL

11/26/1996 NS 6 3 BDL 1 - Toluene

11/20/1997 NS 18 9 BDL

11/9/1998 NS 16 7 BDL 1 - Toluene

11/22/1999 NS 9 4 BDL

11/17/2000 NS 12 4 BDL

11/19/2001 NS 17 6 BDL

11/14/2002 NS 16 5 BDL 1 - Toluene

11/5/2003 NS 7 2 BDL

11/3/2004 NS 6 2 BDL

11/28/2005 NS 2 BDL BDL 1 - Toluene

11/22/2011 NS BDL BDL BDL 2 - Toluene

Nov-90 440 BDL BDL BDL 

5/9/1994 257 BDL BDL BDL 2.20 - THM

11/3/1994 NS BDL BDL BDL 4.20 - THM

4/26/1995 192 BDL BDL BDL 2.5 - THM

11/1/1990 NS BDL BDL BDL 

5/9/1994 833 BDL BDL BDL

12/6/1994 797 BDL BDL BDL

4/26/1995 810 BDL BDL BDL

Nov-90 3,410 74 18 790

5/11/1994 1,682 59 15 200

11/3/1994 1,170 150 29 450

4/21/1995 1,211 78 25 200

10/12/1995 2,440 150 31 410 14 - MTBE

5/2/1996 760 30 6.7 79

11/26/1996 NS 23 4 59

11/20/1997 NS 33 8 81

Replacement Well

installed 11/18/99 11/22/1999 NS BDL BDL 4

12/6/2000 NS 4 1 9

11/19/2001 NS 6 2 12 8 - THM

11/15/2002 NS BDL BDL BDL

11/4/2003 NS BDL BDL BDL 5 - THM

11/3/2004 NS BDL BDL BDL

11/28/2005 NS BDL BDL BDL

MW-2D* Nov-90 3,960 46 41 BDL

MW-2S

MW-6D-4

MW-1S

MW-1D

MW-2S

Decommissioned Wells

MW-6D Location (cont'd)

MW-6D-3

S:\CONDATA\2000s\2049.03\Source Files\2011 Annual Report\LTG Tables.xlsx Page 2 of 8 Sanborn, Head & Associates, Inc.
TABLE 1

Summary of VOCs and Chloride Analytical Data - Monitoring Wells

Town Garage / Radio Beacon Site

Londonderry, New Hampshire

NHDES Site No. 198509001

Monitoring Well

Location

Chloride

(mg/l)

1,1-DCA

(μg/l)

1,1-DCE

(μg/l)

1,1,1-TCA

(μg/l) 

 Other VOCs

(μg/l)

Cleanup Levels 250 mg/l 81 μg/l 7 μg/l 200 μg/l

Date

4/20/1995 5,749 100 9.1 7.3 180 - MTBE

24 - Toluene

10/13/1995 4,090 31 5.2 6.3

110 - MEK

4.8 - THM

6.1 - Toluene

2.2 - Carbon disulfide

5/1/1996 4,100 69 12 5.3

3.5 - Carbon disulfide

3.3 - THM

130 - MEK

10 - Toluene

5.6 - Chloroethane

12/6/1994 5,420 46 4.5 6.9 12 - Toluene

390 - MEK

4/20/1995 5,484 140 13 BDL 72 - Toluene

10/13/1995 4,270 160 17 BDL 75 - Toluene

6.7 - Dimethyl sulfide

5/1/1996 2,800 87 19 BDL

64 - Acetone

8.4 - Carbon disulfide

120 - Toluene

11/27/1996 NS 20 BDL BDL 180 - Toluene

600 - MEK

11/20/1997 NS 12 9 BDL

82 - Toluene

220 - MEK

10 - 2-Hexanone

11/10/1998 NS 9 8 BDL 67 - Toluene

60 - MEK

11/23/1999 NS 5 4 BDL 14 - Toluene

10 - MEK

11/21/2000 NS 6 4 BDL

10 - Acetone

30 - MEK

11 - Toluene

11/19/2001 NS 6 4 BDL

20 - Acetone

20 - MEK

14 - Toluene

11/15/2002 NS 4 3 BDL

20 - Acetone

10 - MEK

13 - Toluene

11/4/2003 NS 4 3 BDL 10 - Acetone

9 - Toluene

11/4/2004 NS 6 3 BDL 20 - Acetone

11 - Toluene

11/28/2005 NS 6 3 BDL 20 - Acetone

13 - Toluene

12/6/1994 2,339 7 6.2 2.6 1.20 - Toluene

4/20/1995 2,458 6.5 5.1 1.7 1.20 - Toluene

10/13/1995 2,410 6.6 5.5 1.7 1.5 - MTBE

5/1/1996 2,400 7.8 9.2 BDL 3.3 - MTBE

6/3/1994 NS BDL BDL 7.6

12/6/1994 7,390 11 8 6.4

4/20/1995 7,979 12 8 5.5

10/12/1995 8,810 14 9.9 5.7 2 - MTBE

5/1/1996 8,700 22 20 9.9 2.8 - MTBE

MW-2D-1

MW-2D-3

MW-2D-4

Decommissioned Wells (cont'd)

MW-2D-2

S:\CONDATA\2000s\2049.03\Source Files\2011 Annual Report\LTG Tables.xlsx Page 3 of 8 Sanborn, Head & Associates, Inc.
TABLE 1

Summary of VOCs and Chloride Analytical Data - Monitoring Wells

Town Garage / Radio Beacon Site

Londonderry, New Hampshire

NHDES Site No. 198509001

Monitoring Well

Location

Chloride

(mg/l)

1,1-DCA

(μg/l)

1,1-DCE

(μg/l)

1,1,1-TCA

(μg/l) 

 Other VOCs

(μg/l)

Cleanup Levels 250 mg/l 81 μg/l 7 μg/l 200 μg/l

Date

6/3/1994 36,000 33 17 34

12/6/1994 18,980 19 15 23

4/20/1995 17,940 34 20 27

10/12/1995 17,400 37 25 20 2.4 - MTBE

5/1/1996 18,800 50 44 30 2.1 - Chloroethane

Nov-90 42 BDL BDL BDL

5/17/1994 39 BDL BDL BDL

11/3/1994 74 6.8 BDL BDL

4/17/1995 29 BDL BDL BDL

10/11/1995 137 BDL BDL BDL

1.1 - Chloroethane

1.7 - THM

2.5 - MTBE

5/13/1996 20 BDL BDL BDL

Nov-90 580 15 BDL BDL

5/17/1994 4,537 11 5.8 BDL

12/1/1994 4,260 11 6.2 BDL

4/17/1995 4,425 9.4 5.1 BDL

10/11/1995 212 11 5.2 BDL

5/13/1996 4,400 12 8.3 BDL

11/26/1996 NS 8 4 BDL

11/20/1997 NS 8 6 BDL

11/9/1998 NS 7 4 BDL

11/22/1999 NS 5 3 BDL

11/17/2000 NS 6 2 BDL

11/19/2001 NS 6 2 BDL

11/14/2002 NS 4 2 BDL

11/5/2003 NS 4 1 BDL

11/3/2004 NS 3 1 BDL

11/28/2005 NS 3 1 BDL

Nov-90 2,880 BDL BDL BDL

5/11/1994 1,124 4.2 BDL BDL 1.40 - Chloroethane

11/3/1994 3,124 6.6 BDL BDL

4/25/1995 2,010 3.6 BDL BDL 4.10 - MTBE

2.20 - Chloroethane

10/17/1995 3,300 4.6 BDL BDL 1.2 - MTBE

4/24/1996 1,210 2.8 BDL BDL 2.7 - Chloroethane

MW-4D* Nov-90 23,500 19 18 25

MW-4D-1 4/26/1996 3,810 7.7 5.9 3.8

2 - Carbon disulfide

6.2 - THM

43 - MEK

2.1 - Methylene 

chloride

2.9 - Toluene

MW-2D-5

Decommissioned Wells (cont'd)

MW-4S

MW-3D

MW-3S

S:\CONDATA\2000s\2049.03\Source Files\2011 Annual Report\LTG Tables.xlsx Page 4 of 8 Sanborn, Head & Associates, Inc.
TABLE 1

Summary of VOCs and Chloride Analytical Data - Monitoring Wells

Town Garage / Radio Beacon Site

Londonderry, New Hampshire

NHDES Site No. 198509001

Monitoring Well

Location

Chloride

(mg/l)

1,1-DCA

(μg/l)

1,1-DCE

(μg/l)

1,1,1-TCA

(μg/l) 

 Other VOCs

(μg/l)

Cleanup Levels 250 mg/l 81 μg/l 7 μg/l 200 μg/l

Date

4/26/1995 24,850 5.1 7.5 4.2 3.50 - THM

9.80 - Toluene

4/26/1996 22,300 8 11 4.5

2.5 - Carbon disulfide

3.2 - THM

3 - Methylene Chloride

4.5 - Toluene

11/25/1996 NS 7 7 3 3 - THM

4 - Toluene

11/20/1997 NS 10 10 2 2 - THM

3 - Toluene

11/10/1998 NS 9 5 BDL 2 - Toluene

11/23/1999 NS 9 5 BDL 4 - Toluene

20 - MEK

11/21/2000 NS 13 6 BDL

20 - Acetone

50 - MEK

4 - Toluene

11/20/2001 NS 13 8 3

20 - Acetone

2 -THM

40 - MEK

4 - Toluene

11/15/2002 NS 6 2 BDL 20 - MEK

3 - Toluene

11/4/2003 NS 9 6 3

20 - Acetone

2 -THM

30 - MEK

4 - Toluene

11/4/2004 NS 9 5 BDL 20 - MEK

4 - Toluene

11/29/2005 NS 9 6 2

10 - Acetone

20 - MEK

4 - Toluene

6/2/1994 22,000 7.6 6.5 41 3.50 - MTBE

12/6/1994 19,720 9.2 6.9 43 2.90 - MTBE

4/26/1995 12,000 9.5 7.5 31

10/17/1995 12,900 8.9 3.6 21 2.2 - MTBE

4/26/1996 13,700 11 5.6 24 2.4 - MTBE

2.7 - Chloroethane

11/25/1996 NS 9 2 15

11/20/1997 NS 10 2 10

11/10/1998 NS 7 1 6

11/23/1999 NS 4 BDL 3

11/21/2000 NS 3 BDL BDL

11/20/2001 NS 3 BDL BDL

11/15/2002 NS BDL BDL BDL

11/4/2003 NS BDL BDL BDL

11/4/2004 NS BDL BDL BDL

11/29/2005 NS BDL BDL BDL

Decommissioned Wells (cont'd)

MW-4D-3

MW-4D-2

S:\CONDATA\2000s\2049.03\Source Files\2011 Annual Report\LTG Tables.xlsx Page 5 of 8 Sanborn, Head & Associates, Inc.
TABLE 1

Summary of VOCs and Chloride Analytical Data - Monitoring Wells

Town Garage / Radio Beacon Site

Londonderry, New Hampshire

NHDES Site No. 198509001

Monitoring Well

Location

Chloride

(mg/l)

1,1-DCA

(μg/l)

1,1-DCE

(μg/l)

1,1,1-TCA

(μg/l) 

 Other VOCs

(μg/l)

Cleanup Levels 250 mg/l 81 μg/l 7 μg/l 200 μg/l

Date

Nov-90 3,550 14 21 190

5/18/1994 3,640 2.2 13 89

11/3/1994 2,040 BDL 14 100

4/25/1995 4,072 BDL 9.4 43

10/17/1995 3,000 2.1 13 64 1.4 - PCE

4/24/1996 5,120 2.2 15 81

11/25/1996 NS BDL 9 55

11/20/1997 NS BDL 12 52

11/10/1998 NS BDL 5 27

11/23/1999 NS BDL 4 21

12/6/2000 NS BDL 5 19 7 - MTBE

11/20/2001 NS BDL 3 11 10 - MTBE

11/15/2002 NS BDL 4 11 5 - MTBE

11/4/2003 NS BDL 3 9

11/4/2004 NS BDL 2 5

11/29/2005 NS BDL 1 4

MW-5D* Nov-90 1,110 9 10 66

MW-5D-1 4/25/1996 NS 5 2.4 4.8

96 - Acetone

2.4 - Carbon disulfide

20 - Toluene

MW-5D-2 4/25/1996 1,290 BDL BDL 7.1

5.2 - Carbon disulfide

5.1 - THM

4.1 - Toluene 

6/3/1994 1,900 3.1 5.4 15

4/25/1996 1,790 BDL 2.6 6.3

6/3/1994 6,900 NS NS NS

12/6/1994 6,110 BDL BDL 4.5

4/25/1995 5,780 BDL BDL BDL

10/11/1995 5,760 1 TRACE 2.2 1.6 - MTBE

4/25/1996 6,030 BDL BDL 3.7 3.5 - MTBE

11/25/1996 NS BDL BDL 2

11/20/1997 NS BDL BDL BDL

11/10/1998 NS BDL BDL BDL

11/23/1999 NS BDL BDL BDL

11/21/2000 NS BDL BDL BDL 10 - MTBE

Nov-90 100 BDL BDL BDL

5/17/1994 191 BDL BDL BDL

5/25/1994 174 NS NS NS

11/3/1994 301 BDL BDL BDL

4/17/1995 118 BDL BDL BDL

Nov-90 46 BDL BDL BDL

5/17/1994 95 BDL BDL BDL

11/3/1994 107 BDL BDL BDL

4/17/1995 70 BDL BDL BDL

11/1/1990 35 BDL BDL BDL

5/17/1994 105 BDL BDL BDL

12/6/1994 103 BDL BDL BDL

4/17/1995 99 BDL BDL BDL

Decommissioned Wells (cont'd)

MW-5D-3

MW-5S

MW-7S

MW-6S

MW-5D-4

MW-7D

S:\CONDATA\2000s\2049.03\Source Files\2011 Annual Report\LTG Tables.xlsx Page 6 of 8 Sanborn, Head & Associates, Inc.
TABLE 1

Summary of VOCs and Chloride Analytical Data - Monitoring Wells

Town Garage / Radio Beacon Site

Londonderry, New Hampshire

NHDES Site No. 198509001

Monitoring Well

Location

Chloride

(mg/l)

1,1-DCA

(μg/l)

1,1-DCE

(μg/l)

1,1,1-TCA

(μg/l) 

 Other VOCs

(μg/l)

Cleanup Levels 250 mg/l 81 μg/l 7 μg/l 200 μg/l

Date

Nov-90 3,460 BDL BDL BDL

5/10/1994 597 BDL BDL BDL

11/3/1994 2,105 2.1 BDL 4.6

4/18/1995 895 BDL BDL BDL

10/16/1995 2,700 BDL BDL 5.8

5/3/1996 865 BDL BDL BDL

Nov-90 9,130 48 28 BDL

5/10/1994 1,004 BDL BDL 2

11/3/1994 2,439 2.7 1.3 2.7

4/18/1995 1,122 BDL BDL 1.2

10/16/1995 8,700 11 6 2.9 1.8 - MTBE

5/3/1996 2,140 2.5 BDL 3

11/27/1996 NS 7 4 BDL

11/20/1997 NS 7 5 BDL

11/9/1998 NS 5 3 BDL

11/22/1999 NS 3 2 BDL

11/17/2000 NS 3 1 BDL

16 - Chloromethane

21 - Vinyl Chloride

20 - Acetone

15 - Carbon Disulfide

46 - Benzene

9 - Toluene

4 - Styrene

11/19/2001 NS 4 1 BDL

11/14/2002 NS 2 1 BDL

11/4/2003 NS 3 1 BDL

11/3/2004 NS 2 BDL BDL

11/28/2005 NS BDL BDL BDL

Nov-90 530 BDL BDL BDL

5/11/1994 499 BDL BDL 1.6

11/3/1994 869 BDL BDL 12

4/18/1995 642 BDL BDL 1.2

10/13/1995 860 BDL BDL 11

5/2/1996 490 BDL BDL BDL

6/2/1996 191 BDL BDL BDL

12/8/1994 347 BDL BDL BDL 1.4 - Toluene

4/26/1995 228 BDL BDL BDL

10/17/1995 200 BDL BDL BDL

5/7/1996 130 BDL BDL BDL

5/18/1994 148 1.5 BDL BDL 1.1 - Chloromethane

12/9/1994 118 2.3 BDL BDL

4/26/1995 162 1.4 BDL BDL

10/17/1995 200 1.8 BDL BDL

5/7/1996 156 BDL BDL BDL

Decommissioned Wells (cont'd)

RWGD

MW-8S

MW-9S

RWGS

MW-8D

S:\CONDATA\2000s\2049.03\Source Files\2011 Annual Report\LTG Tables.xlsx Page 7 of 8 Sanborn, Head & Associates, Inc.
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Notes:

1. "1,1-DCA" indicates 1,1-dichloroethane.

"1,1-DCE" indicates 1,1-dichloroethene.

"1,1,1-TCA" indicates 1,1,1-trichloroethane.

"MEK" indicates methyl-ethyl-ketone.

"MTBE" indicates methyl-t-butyl ether.

"THM" indicates chloroform.

"BDL" indicates below detection limit.

"NS" indicates not sampled.

2. Underline indicates that the well was sampled in 2011 (MW-2R, MW-6D-2, and

MW-6D-4 only.).

3. Shading indicates exceedance of Site Cleanup Level.

4. "*" indicates that monitoring wells MW-2D, MW-4D, MW-5D, and MW-6D were

converted to permanent Solinst multilevel wells in 1992.

5. Cleanup levels: chloride = 250 mg/l; 1,1-DCA = 81 μg/l; 1,1-DCE = 7 μg/l; 1,1,1-

TCA = 200 μg/l. Note that exceedances are shaded.

6. Although not shaded in the above table, the November 2000 sample from MW-8D

contained two analytes that exceeded MCLs: benzene and vinyl chloride, with MCLs

of 5 μg/l and 2 μg/l respectively.

S:\CONDATA\2000s\2049.03\Source Files\2011 Annual Report\LTG Tables.xlsx Page 8 of 8 Sanborn, Head & Associates, Inc.
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Concentrations in μg/l.

MW-2R MW-6D-2 MW-6D-4

05/19/10 05/19/10

Dup. 11/22/11 11/22/11 11/22/11Dup. 11/22/11

Dioxane (1,4-) 3 † <1 <1 0.44 0.34 0.35 <0.25

Antimony 6 NA <5 <5 <5 <5

Arsenic 10 NA <1 <1 <5 <5 <5 <5

Barium 2,000 NA 400 210 200 85

Beryllium 4 NA <1 <1 <1 <1

Chromium 100 NA <5 <5 <5 <5

Analyte GW-1

(AGQS) GW-2

Notes:

1. Samples were collected by Sanborn Head on the dates indicated and analyzed by Eastern Analytical, Inc. of Concord,

New Hampshire for 1,4-dioxane United States Environmental Protection Agency (USEPA) Method 8260B in selective

ion monitoring (SIM) mode, and unfiltered metals by USEPA Method 6020.

2. Concentrations are presented in micrograms per liter (μg/l) which are equivalent to parts per billion (ppb).

3. A blank indicates the sample was not analyzed for this analyte.

"<" indicates the analyte was not detected above the indicated laboratory reporting limit.

4. "GW-1" and "GW-2" Groundwater Standards are from the New Hampshire Department of Environmental Services

(NHDES) Contaminated Sites Risk Characterization and Management Policy (RCMP) (January 1998, with 2000 through

2007 revisions/addenda). GW-1 Groundwater Standards are equivalent to the Ambient Groundwater Quality

Standards (AGQSs) promulgated in Env-Or 600 (July 2008). The AGQS/GW-1 Groundwater Standards are intended to

be protective of groundwater as a source of drinking water. The GW-2 Groundwater Standards apply to groundwater

as a potential source of indoor air contamination

5. "†" indicates the RCMP lists as not currently available.

"NA" indicates the RCMP lists as not applicable.

S:\CONDATA\2000s\2049.03\Source Files\2011 Annual Report\LTG Tables.xlsx Page 1 of 1 Sanborn, Head & Associates, Inc.
FIGURES

 
TAX MAP 9

TAX MAP 6

TOWN GARAGE

PROPERTY

MW-2R

MW-6D-2,4

File:\\conserv1\DataShare\DATA\CONDATA\2000s\2049.03\Graphics Files\CAD\2011 Summary Report\GW_Monitoring_Locations.dwg Plot Date: 1-4-12 

Legend

MW-2R

MW-6D-2,4

Approximate Groundwater Management Zone (GMZ) BoundaryApproximate Property BoundaryApproximate Tax Map Boundary

Tax Map Lot Number

Replacement shallow bedrock monitoring well location and designation included in

the groundwater monitoring program as described in the June 2006 RevisedAmendment No. 2 to the SOW.As described in the June 2006 Revised Amendment No. 2 to the SOW, the

monitoring well was removed from the groundwater monitoring program and not

decommissioned. This well was included in the November 2011 sampling event at

the request of USEPA.
S:\CONDATA\2000s\2049.03\Source Files\2011 Annual Report\MonWellPlot.xls\MW-2R 

0.1

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10

100

1000

Jan-94 Jan-95 Jan-96 Jan-97 Jan-98 Jan-99 Jan-00 Jan-01 Jan-02 Jan-03 Jan-04 Jan-05 Jan-06 Jan-07 Jan-08 

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1,1,1-TCA 1,1-DCA 1,1-DCE 1,1,1-TCA Cleanup Goal (200) 1,1-DCA Cleanup Goal (81) 1,1-DCE Cleanup Goal (

Monitoring well MW-2D-6 was replaced by monitoring well MW-2R on October 30, 2006. Data points shown from January 1994 through December 2005 reflect samples collected from monitoring well MW-2D-6. Data points shown after January 2006 reflect samples collected from monitoring well MW-2R.Data points plotting at 0.1 ug/L represent concentrationsbelow laboratory reporting limits
Note: ND = 0.1 μg/l.

S:\CONDATA\2000s\2049\2005 Report\MonWellPlots.xls 

0.1

1

10

100

1000

Jan-94 Jan-95 Jan-96 Jan-97 Jan-98 Jan-99 Jan-00 Jan-01 Jan-02 Jan-03 Jan-04 Jan-05 Jan-06 Jan-07 Jan-08 

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Concentration vs. Time Plot

0:'

1,1,1-TCA 1,1-DCA 1,1-DCE 1,1,1-TCA Cleanup Goal (200) 1,1-DCA Cleanup Goal (81) 

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ATTACHMENT A

LIMITATIONS

 
ATTACHMENT A

LIMITATIONS

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January 2012  Page 2

Limitations.docx  2049.03

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ATTACHMENT B

GROUNDWATER QUALITY

FIELD SAMPLING SUMMARY FORM

 
Groundwater Quality Field Sampling Summary

 Date:

Field Measurements

 Sampling Location MW-2R MW-6D-2 MW-6D-4

 Reference Point TPVC TOC TOC

 Reference Point Elevation (feet) 355.69 – –

 Depth to Water (feet) 2.93 – –

 Water Table Elevation (feet) 352.76 300.61 –

 Depth to Bottom (feet bgs) 48.5

99

(from 

TOC)

31

(from 

TOC)

 pH (standard units) 6.8 7.5 7.4

 Specific Conductance (μS/cm) 12,021 6,541 3,040

 Temperature (°C) 9.4 9.5 8.9

 Dissolved Oxygen (mg/L) 0.4 0.1 0.5

 Oxidation Reduction Potential (mV) 144 -77 -76

 Turbidity (NTU) 3.7 0.35 1.2

 Date of Sample 22-Nov 22-Nov 22-Nov

 Sample Time 1105 1227 1320

 Comment Reference Number 1,2,7 1,3,4,5,7 1,6,7

Comments

 Weather: Cloudy, 40s °F

 Project Manager: T. White

 Collector(s): M. Stein

 pH, Conductivity, Temperature, DO, ORP Meter: 

 YSI 556 MPS

 Turbidity Meter: Hach 2100P

 Water Level Meter: QED MP30 (MW-2R); 

 Geokon GK404 (MW-6D-2 and MW-6D-4)

 Project Number: 2049.03

 Project Name: Londonderry Town Garage

 Project Location: Londonderry, New Hampshire

November 22, 2011

1. Field screening parameters were generally monitored approximately every five minutes during purging. After the field 

parameters stabilized, groundwater samples were collected. Indicated field parameters were the last stabilized values recorded

prior to sample collection.

2. Groundwater level measurement was obtained using a QED MP30 electronic water level meter. The well was purged and 

sampled using a 3⁄4-inch diameter bladder pump at flow rates of approximately 40 mL/min. The intake of the bladder pump was 

set at approximately 37.3 ft below ground surface [bgs], which corresponded to the approximate mid-screen depth. 

3. Groundwater level measurement was obtained using previously-installed Geokon, Inc. vibrating wire pressure transducer 

and a Geokon, Inc. GK-401 readout box. The well was purged and sampled using previously-installed, dedicated Solinst inert 

gas (UHP nitrogen)-driven pumps and sampling tubes at flow rates of approximately 120 mL/min. 

4. Field duplicate (labeled "Dup-1") collected.

5. The groundwater elevation calculated from measurements made using the Geokon are approximately 30 feet lower than 

historical values for MW-6D-2, suggesting that the pressure transducer permanently installed in the well may be 

malfunctioning.

6. The pressure transducer installed in MW-6D-4 was not operational at the time of measurement. The well was purged and 

sampled using previously-installed, dedicated Solinst inert gas (UHP nitrogen)-driven pumps and sampling tubes at flow rates 

of approximately 50 mL/min. 

7. Sampling methods used were consistent with previous sampling events and the site QAPP (e.g., low flow rate, stabilization of 

parameters, field quality assurance/quality control). 

S:\CONDATA\2000s\2049.03\Source Files\

2011 Annual Report\Att B - Field\20111122 GwQFSS.xlsx Page 1 of 1 Sanborn, Head & Associates, Inc.
ATTACHMENT C

ANALYTICAL LABORATORY

DATA REPORT

 
--~ j _______________________ e_a_s_t_e_r_n __ a_n_a_l_y_t_ic_a __ l __ _ ;'>t ·u;;.\,l'iu.:;r:/ , t.'t,ti t r · ; t, 1: . 

Tim White 

Sanborn, Head & Associates, Inc. (NH) 

20 Foundry Street 

Concord NH 03301 

Subject: Laboratory Report 

Eastern Analytical, Inc. ID: 105510 

Client Identification: Londonderry Town Garage 12049.03 

Date Received: 11/22/2011 

Report revision/reissue: Revision, replaces report dated 12/2/11 

Revision information: The QC Report for Metals has been revised. 

Dear Mr. White : 

Enclosed please find the laboratory report for the above identified project. All analyses were performed in 

accordance with our QAIQC 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 (NHOOS), 

Massachusetts (M-NHOOS), 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, 

LJjtjft 

Date 

\0 

#of pages (excluding cover letter) 

Wll'\l·.cail:tbs.com I I I ! I ' ~ ... I 
SAMPLE CONDITIONS PAGE EAIID#: 105510 

Client: Sanborn, Head & Associates, Inc. (NH) 

Client Designation: Londonderry Town Garage I 2049.03 

Temperature upon receipt (

0 C): 4.7 Received on ice or cold packs (Yes/No): y 

Acceptable temperature range ("C): 0-6 

Date Date Sample %Dry 

LabiD Sample 10 Received Sampled Matrix Weight Exceptions/Comments (other than thermal preservation) 

105510.01 MW-2R /11-22-11 11/22/11 11/22/11 aqueous Adheres to Sample Acceptance Policy 

105510.02 MW-60-2/11-22-11 11/22/11 11/22/11 aqueous Adheres to Sample Acceptance Policy 

105510.03 MW-60-4 I 11-22-11 11/22/11 11/22/11 aqueous Adheres to Sample Acceptance Policy 

105510.04 Oup-1 /11-22·11 11/22/1 1 11/22/11 aqueous Adheres to Sample Acceptance Policy 

105510.05 Trip Blank /1 1-22-11 11/22/1 1 11/14/11 aqueous Adheres to Sample Acceptance Policy 

105510.06 Trip Blank /1 1-22-11 11/22/1 1 11/17/11 aqueous Adheres to Sample Acceptance Policy 

Samples were properly preserved and the pH measured when applicable unless otherwise noted. Analysis of solids for pH, Flashpoint, 

lgnitibility, Paint Filter, Corrosivity, Conductivity and Specific Gravity are reported on an •as received" basis. 

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

References include: 

1) EPA 60014-79-020, 1983 

2) Standard Methods for Examination of Water and Wastewater : lnorganics, 19th Edition, 1995; Microbiology, 20th Edition, 1998 

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 Phone: (603) 228-0525 1 
" 

I 

lllAAI LABORATORY REPORT EAIID#: 105510 

Client: Sanborn, Head & Associates, Inc. (NH) 

Client Designation: Londonderry Town Garage 12049.03 

Sample ID: MW-2R 111-22-1 1 MW-60-21 MW-60-41 Oup-1 I Trip Blank I 

11-22-11 11-22-11 11-22-11 11-22-11 

Lab Sample ID: 105510.01 105510.02 105510.03 105510.04 105510.05 

Matrix: aqueous aqueous aqueous aqueous aqueous 

Date Sampled: 11122111 11122/11 11122111 11122111 11114111 

Date Received: 11122111 11/22/11 11122/11 11/22/11 11/22/11 

Units: ug/1 ug/1 ugll ugll ugll 

Date of Analysis: 11124/11 11124/11 11124/11 11124/11 11/24/11 

An alyst: BAM BAM BAM BAM BAM 

Method: 8260B 82608 8260B 82608 8260B 

Dilution Factor: 

Oichlorodifluoromethane <5 <5 <5 <5 <5 

Chloromethane <2 <2 <2 <2 <2 

Vinyl chloride <2 <2 <2 <2 <2 

Bromomethane <2 <2 <2 <2 <2 

Chloroethane <5 <5 <5 <5 <5 

Trichlorofluoromethane <5 <5 <5 <5 <5 

Diethyl Ether <5 <5 <5 <5 <5 

Acetone < 10 <10 < 10 <10 < 10 

1, 1-0ichloroethene 3 < 1 < 1 <1 < 1 

tert-Butyl Alcohol (TBA) < 30 < 30 < 30 < 30 < 30 

Methylene chloride <5 <5 <5 <5 <5 

Carbon disulfide <5 <5 <5 <5 <5 

Methyl-t-butyl ether(MTBE) <5 <5 <5 <5 <5 

Ethyl-t-butyl ether(ETBE) <5 <5 <5 <5 <5 

Isopropyl ether(DIPE) <5 <5 <5 <5 <5 

tert-amy1 methyl ether(TAME) <5 <5 <5 <5 <5 

trans-1,2-Dichloroethene <2 <2 <2 <2 <2 

1,1-0ichloroethane 7 3 <2 3 <2 

2,2-0ichloropropane <2 <2 <2 <2 <2 

cis-1 ,2-Dichloroethene <2 <2 <2 <2 <2 

2-Butanone(MEK) < 10 < 10 < 10 <10 < 10 

Bromochloromethane <2 <2 <2 <2 <2 

Tetrahydrofuran(THF) < 10 < 10 < 10 <10 < 10 

Chloroform <2 <2 <2 <2 <2 

1,1 , 1-Trichloroethane <2 <2 <2 <2 <2 

Carbon tetrachloride <2 <2 <2 <2 <2 

1 , 1-0ichloropropene <2 <2 <2 <2 <2 

Benzene < 1 < 1 <1 < 1 < 1 

1,2-0ichloroethane <2 <2 <2 <2 <2 

Trichloroethene <2 <2 <2 <2 <2 

1,2-0ichloropropane <2 <2 <2 <2 <2 

Dibromomethane <2 <2 <2 <2 <2 

Bromodichloromethane < 0.5 < 0.5 < 0.5 < 0.5 < 0.5 

1 ,4-0ioxane <50 <50 <50 <50 <50 

4-Methyl-2-pentanone(M I BK) <10 < 10 < 10 < 10 < 10 

cis-1,3-0ichloropropene <2 <2 <2 <2 <2 

Toluene < 1 2 2 2 < 1 

trans-1 ,3-Dichloropropene <2 <2 <2 <2 <2 

1, 1,2-Trichloroethane <2 <2 <2 <2 <2 

2-Hexanone < 10 < 10 < 10 <10 < 10 

Tetrachloroethene <2 <2 <2 <2 <2 

1,3-0ichloropropane <2 <2 <2 <2 <2 

Dibromochloromethane <2 <2 <2 <2 <2 

1,2-0ibromoethane(EDB) <2 <2 <2 <2 <2 

Chlorobenzene <2 <2 <2 <2 <2 

1.1 .1.2-Tetrachloroethane <2 <2 <2 <2 <2 

eastern analytical, inc. www. eailabs. com Phone: (603) 228-0525 2 
f, 

I·AAAI LABORATORY REPORT EAIID#: 105510 

Client: Sanborn, Head & Associates, Inc. (NH) 

Client Designation: Londonderry Town Garage I 2049.03 

Sample ID: MW-2R 111 -22-11 MW-60-21 MW-60-41 Oup-1 I Trip Blank I 

11-22-11 11-22-11 11-22-11 11-22-11 

Lab Sample ID: 105510.01 105510.02 105510.03 105510.04 105510.05 

Matrix: aqueous aqueous aqueous aqueous aqueous 

Date Sampled: 11122/11 11122111 11122111 11122111 11114111 

Date Received: 11122/11 11122111 11122111 11122111 11122111 

Units: ug/1 ugll ugll ugll ugll 

Date of Analysis: 11124111 11124111 11124111 1112411 1 11124111 

Analyst: BAM BAM BAM BAM BAM 

Method: 82608 8260B 8260B 82608 82608 

Dilution Factor: 

Ethylbenzene < 1 < 1 < 1 < 1 < 1 

mp-Xylene < 1 < 1 <1 < 1 < 1 

o-Xylene < 1 < 1 < 1 < 1 < 1 

Styrene < 1 < 1 < 1 < 1 < 1 

Bromoform <2 <2 <2 <2 <2 

lsoPropylbenzene < 1 < 1 < 1 < 1 < 1 

Bromobenzene <2 <2 <2 <2 <2 

1,1 ,2,2-Tetrachloroethane <2 <2 <2 <2 <2 

1 ,2,3-Trichloropropane <2 <2 <2 <2 <2 

n-Propylbenzene < 1 < 1 < 1 < 1 < 1 

2-Chlorotoluene <2 <2 <2 <2 <2 

4-Chlorotoluene <2 <2 <2 <2 <2 

1 ,3,5-Trimethylbenzene < 1 < 1 < 1 < 1 < 1 

tert-Butylbenzene < 1 < 1 <1 < 1 < 1 

1 ,2,4-Trimethylbenzene < 1 < 1 < 1 < 1 < 1 

sec-Butylbenzene < 1 < 1 < 1 < 1 < 1 

1 ,3-0ichlorobenzene < 1 < 1 <1 < 1 < 1 

p-lsopropyltoluene < 1 < 1 < 1 < 1 < 1 

1,4-0ichlorobenzene < 1 < 1 < 1 < 1 < 1 

1 ,2-Dichlorobenzene < 1 < 1 < 1 < 1 < 1 

n-Butylbenzene < 1 < 1 < 1 < 1 < 1 

1 ,2-Dibromo-3-chloropropane <2 <2 <2 <2 <2 

1,3,5-Trichlorobenzene < 1 < 1 < 1 < 1 < 1 

1,2,4-Trichlorobenzene < 1 < 1 < 1 < 1 < 1 

Hexachlorobutadiene < 0.5 < 0.5 < 0.5 < 0.5 < 0.5 

Naphthalene <5 <5 <5 <5 <5 

1 ,2,3-Trichlorobenzene < 1 < 1 < 1 < 1 <1 

4-Bromofluorobenzene (surr) 88%R 87%R 88%R 88%R 88%R 

1 ,2-Dichlorobenzene-d4 (surr) 103 %R 103 %R 103%R 103 %R 103 %R 

Toluene-dB (surr) 94%R 94%R 94%R 94%R 94%R 

eastern analytical, inc. www.eailabs.com Phone: (603) 228-0525 3 
,' 

'• 

QC REPORT EAIID#: 105510 

Client: Sanborn, Head & Associates, Inc. (NH) 

Client Designation: Londonderry Town Garage 12049.03 

Parameter Name Blank LCS LCSD Analysis Date Units Limits RPD Method 

Dichlorodifluoromethane 

Chloromethane 

Vinyl chloride 

8romomethane 

Chloroethane 

Trichlorofluoromethane 

Oiethyl Ether 

Acetone 

1, 1-Dichloroethene 

tert-8utyl Alcohol (T8A) 

Methylene chloride 

Carbon disulfide 

Methyl-t-butyl ether(MT8E) 

Ethyl-t-butyl ether(ET8E) 

Isopropyl ether(DIPE) 

tert-amyl methyl ether(TAME) 

trans-1 ,2-Dichloroethene 

1, 1-Dichloroethane 

2,2-Dichloropropane 

cis-1 ,2-Dichloroethene 

2-8utanone(MEK) 

Bromochloromethane 

Tetrahydrofuran(THF) 

Chloroform 

1 , 1 , 1-Trichloroethane 

Carbon tetrachloride 

1 , 1-Dichloropropene 

Benzene 

1 ,2-Dichloroethane 

Trichloroethene 

1 ,2-Dichloropropane 

Dibromomethane 

Bromodichloromethane 

1 ,4-Dioxane 

4-Methyl-2-pentanone(MI8K) 

cis-1 ,3-Dichloropropene 

Toluene 

trans-1 ,3-Dichloropropene 

1,1 ,2-Trichloroethane 

2-Hexanone 

Tetrachloroethene 

1,3-Dichloropropane 

Dibromochloromethane 

1 ,2-Dibromoethane(ED8) 

Chlorobenzene 

<5 

<2 

<2 

<2 

<5 

<5 

<5 

< 10 

< 1 

< 30 

<5 

<5 

<5 

<5 

<5 

<5 

<2 

<2 

<2 

<2 

< 10 

<2 

< 10 

<2 

<2 

<2 

<2 

< 1 

<2 

<2 

<2 

<2 

< 0.5 

<50 

< 10 

<2 

< 1 

<2 

<2 

< 10 

<2 

<2 

<2 

<2 

<2 

eastern analytical, inc. 

18 (88 %R) 

20 (99 %R) 

22 (108 %R) 

11 (57 %R) 

19 (95 %R) 

17 (86 %R) 

20 (100 %R) 

20 (113 %R) 

15 (77 %R) 

90 (94 %R) 

18 (88 %R) 

* 14 (69 %R) 

15 (77 %R) 

18 (90 %R) 

21 (103 %R) 

16 (78 %R) 

16 (79 %R) 

19 (96 %R) 

* 7 (35 %R) 

21 (105%R) 

20 (107 %R) 

18 (89 %R) 

20 (103 %R) 

17 (87 %R) 

14 (71 %R) 

* 12 (62 %R) 

17 (87 %R) 

18 (88 %R) 

19 (94 %R) 

17 (86 %R) 

19 (95 %R) 

18(90%R) 

15 (76 %R) 

<50 (96 %R) 

20 (107 %R) 

15 (75 %R) 

19 (95 %R) 

* 14 (69 %R) 

19 (97 %R) 

20 (106 %R) 

21 (106 %R) 

20 (98 %R) 

16 (79 %R) 

19 (97 %R) 

18 (92 %R) 

18(89%R)(1 RPD) 11/23/2011 

19(96%R)(3RPD) 11/23/2011 

22 (108 %R) (0 RPD) 11/23/2011 

14 (69 %R) (19 RPD) 11/23/2011 

19 (96 %R) (1 RPD) 11/23/2011 

17 (87 %R) (1 RPD) 11/23/2011 

20 (101 %R) (1 RPD} 11/23/2011 

20 (119 %R) (5 RPD) 11/23/2011 

15 (77 %R) (0 RPD) 11/23/2011 

100 (1 04 %R) (1 0 RPD) 11/23/2011 

18 (88 %R) (0 RPD) 11/23/2011 

14 (72 %R) (4 RPD) 11/23/2011 

16 (79 %R) (3 RPD) 11/23/2011 

18 (92 %R) (2 RPD) 11/23/2011 

19 (93 %R) (1 0 RPO) 11/23/2011 

16 (80 %R) (3 RPD) 11/23/2011 

16 (80 %R) (1 RPO) 11/23/2011 

19 (93 %R) (3 RPD) 11/23/2011 

* 8 (39 %R) (11 RPD) 11/23/2011 

21 (103 %R) (2 RPD) 11/23/2011 

20 (112 %R) (5 RPD) 11/23/2011 

18 (89 %R) (0 RPD) 11/23/2011 

20 (111 %R) (7 RPD) 11/23/2011 

17 (87 %R) (0 RPD) 11/23/2011 

15 (73 %R) (3 RPD) 11/23/2011 

* 13 (65 %R) (5 RPD) 11/23/2011 

17 (87 %R) (0 RPD) 11/23/2011 

18 (90 %R) (2 RPD) 11/23/2011 

19 (94 %R) (0 RPD) 11/23/2011 

18 (88 %R) (2 RPD) 11/23/2011 

19 (95 %R) (0 RPD) 11/23/2011 

18 (91 %R) (1 RPD) 11/23/2011 

15 (77 %R) (1 RPD) 11/23/2011 

<50 (129 %R) (29 RPO) ! 11/23/2011 

20 (112 %R) (5 RPD) 11/23/2011 

15 (76 %R) (1 RPD) 11/23/2011 

19 (95 %R) (0 RPD) 11/23/2011 

14 (71 %R) (3 RPD) 11/23/2011 

19 (97 %R) (0 RPD) 11/23/2011 

20 (113 %R) (6 RPD) 11/23/2011 

22 (1 09 %R) (3 RPD) 11/23/2011 

20 (98 %R) (0 RPD) 11/23/2011 

16 (80 %R) (1 RPD) 11/23/2011 

19 (97 %R) (0 RPD) 11/23/2011 

18 (92 %R) (0 RPD) 11/23/2011 

www.eailabs.com 

ug/1 40- 160 20 

ug/1 40- 160 20 

ug/1 70 - 130 20 

ug/1 40- 160 20 

ug/1 70 - 130 20 

ug/1 70- 130 20 

ug/1 70 - 130 20 

ug/1 40 - 160 20 

ug/1 70- 130 20 

ug/1 70 - 130 20 

ug/1 70- 130 20 

ug/1 70- 130 20 

ug/1 70- 130 20 

ug/1 70- 130 20 

ug/1 70- 130 20 

ug/1 70- 130 20 

ug/1 70- 130 20 

ug/1 70- 130 20 

ug/1 70- 130 20 

ug/1 70- 130 20 

ug/1 40- 160 20 

ug/1 70 - 130 20 

ug/1 70- 130 20 

ug/1 70- 130 20 

ug/1 70 - 130 20 

ug/1 70- 130 20 

ug/1 70 - 130 20 

ug/1 70- 130 20 

ug/1 70- 130 20 

ug/1 70- 130 20 

ug/1 70 - 130 20 

ug/1 70- 130 20 

ug/1 70- 130 20 

ug/1 40- 160 20 

ug/1 40- 160 20 

ug/1 70- 130 20 

ug/1 70- 130 20 

ug/1 70- 130 20 

ug/1 70- 130 20 

ug/1 40- 160 20 

ug/1 70- 130 20 

ug/1 70- 130 20 

ug/1 70- 130 20 

ug/1 70- 130 20 

UQ/1 70- 130 20 

Phone: (603) 228-0525 

82608 

82608 

82608 

82608 

82608 

82608 

82608 

82608 

82608 

82608 

82608 

82608 

82608 

82608 

82608 

82608 

82608 

82608 

82608 

82608 

82608 

82608 

82608 

82608 

82608 

82608 

82608 

82608 

82608 

82608 

82608 

82608 

82608 

82608 

82608 

82608 

82608 

82608 

82608 

82608 

82608 

82608 

82608 

82608 

82608 

4 
QC REPORT 

Client: Sanborn, Head & Associates, Inc. (NH) 

Client Designation: Londonderry Town Garage 12049.03 

Parameter Name Blank LCS LCSD Analysis Date Units 

1,1 ,1,2-Tetrachloroethane <2 16 (81 %R) 16 (82 %R) (1 RPD) 

Ethylbenzene < 1 19 (97 %R) 19 (96 %R) (1 RPD) 

mp-Xylene < 1 37 (93 %R) 37 (93 %R) (0 RPD) 

o-Xylene < 1 19 (94 %R) 19 (93 %R) (1 RPD) 

Styrene < 1 19 (94 %R) 19 (93 %R) (1 RPD) 

Bromoform <2 15 (75 %R) 15 (75 %R) (0 RPD) 

lsoPropylbenzene < 1 21 (103 %R) 20 (1 02 %R) (1 RPD) 

8romobenzene <2 17 (87 %R) 18 (88 %R) (1 RPD) 

1,1,2,2-Tetrachloroethane <2 17 (84 %R) 17 (85 %R) (1 RPD) 

1,2,3-Trichloropropane <2 18 (90 %R) 18 (92 %R) (2 RPD) 

n-Propylbenzene < 1 18(91 %R) 18 (92 %R) (1 RPO) 

2-Chlorotoluene <2 17 (87 %R) 17 (87 %R) (0 RPD) 

4-Chlorotoluene <2 18 (91 %R) 18 (91 %R) (0 RPD) 

1,3,5-Trimethylbenzene < 1 18 (90 %R) 18 (90 o/oR) (0 RPD) 

tert-Butylbenzene < 1 18 (91 %R) 18 (92 o/oR) (1 RPD) 

1,2.4-Trimethylbenzene < 1 18 (90 %R) 18 (89 %R) (1 RPD) 

sec-Butyl benzene < 1 18 (91 %R) 19 (93 %R) (2 RPD) 

1,3-Dichlorobenzene < 1 18 (90 %R) 18 (90 %R) (0 RPD) 

p-lsopropyltoluene < 1 18 (91 %R) 19 (93 %R) (2 RPD) 

1,4-Dichlorobenzene < 1 18 (91 %R) 18 (91 %R) (0 RPD) 

1,2-Dichlorobenzene < 1 18 (90 %R) 18 (91 %R) (1 RPD) 

n-8utylbenzene < 1 18 (89 %R) 18 (92 %R) (3 RPD) 

1,2-Dibromo-3-chloropropane <2 17 (84 %R) 18 (90 %R) (7 RPD) 

1,3,5-Trichlorobenzene < 1 17(87%R) 18 (89 o/oR) (2 RPD) 

1 ,2,4-Trichlorobenzene < 1 19 (93 %R) 19 (94 %R) (1 RPD) 

Hexachlorobutadiene < 0.5 15 (75 %R) 16 (79 %R) (5 RPD) 

Naphthalene <5 19 (97 %R) 20 (1 00 %R) (3 RPD) 

1 ,2,3-Trichlorobenzene < 1 19 (93 %R) 19 (95 %R) (2 RPD) 

4-Bromofluorobenzene (surr) 88%R 93%R 92 %R 

1,2-Dichlorobenzene-d4 (surr) 102 %R 97%R 96%R 

Toluene-dB (surr) 94%R 97%R 96%R 

Samples were extracted and analyzed within holding time limits. 

Instrumentation was calibrated in accordance with the method requirements. 

The method blanks were free of contamination at the reporting limits. 

Sample surrogate recoveries met the above stated criteria. 

11/23/2011 

11/23/2011 

11/23/2011 

11/23/2011 

11/23/2011 

11/23/2011 

11/23/2011 

11/23/2011 

11123/2011 

11/23/2011 

11/23/2011 

11/23/2011 

11/23/2011 

11/23/2011 

11/23/2011 

11/23/2011 

11/23/2011 

11/23/2011 

11/23/2011 

11/23/2011 

11/23/2011 

11/23/2011 

11/23/2011 

11/23/2011 

11/23/2011 

11/23/2011 

11/23/2011 

11/23/2011 

11/23/2011 

11/23/2011 

11/23/2011 

The associated matrix spikes and/or Laboratory Control Samples met acceptance criteria. 

There were no exceptions in the analyses, unless noted. 

ug/1 

ug/1 

ug/1 

ug/1 

ug/1 

ug/1 

ug/1 

ug/1 

ug/1 

ug/1 

ug/1 

ug/1 

ug/1 

ug/1 

ug/1 

ug/1 

ug/1 

ug/1 

ug/1 

ug/1 

ug/1 

ug/1 

ug/1 

ug/1 

ug/1 

ug/1 

ug/1 

ug/1 

% Rec 

% Rec 

% Rec 

*/! Flagged analyte recoveries deviated from the QA/QC limits. Any impact to data is addressed below. 

EAI 10#: 105510 

Limits RPD Method 

70- 130 20 82608 

70- 130 20 82608 

70. 130 20 82608 

70- 130 20 82608 

70. 130 20 82608 

70- 130 20 82608 

70 - 130 20 82608 

70. 130 20 82608 

70- 130 20 82608 

70. 130 20 82608 

70- 130 20 82608 

70. 130 20 82608 

70. 130 20 82608 

70. 130 20 82608 

70-130 20 82608 

70-130 20 82608 

70-130 20 82608 

70-130 20 82608 

70- 130 20 82608 

70-130 20 82608 

70-130 20 82608 

70. 130 20 82608 

70. 130 20 82608 

70- 130 20 82608 

70 - 130 20 82608 

70-130 20 82608 

70-130 20 82608 

70-130 20 82608 

70-130 20 82608 

70-130 20 82608 

70- 130 20 82608 

eastern analytical, inc. www.eailabs.com Phone: (603) 228-0525 5 
., 

.J 1/\_bl LABORATORY REPORT EAIID#: 105510 

Client: Sanborn, Head & Associates, Inc. (NH) 

Client Designation: Londonderry Town Garage I 2049.03 

Sample ID: MW-2R I 11-22-11 MW-60-21 MW-60-41 Dup-1 I Trip Blank I 

11-22-11 11-22-11 11-22-11 11-22-11 

Lab Sample ID: 105510.01 105510.02 105510.03 105510.04 105510.06 

Matrix: aqueous aqueous aqueous aqueous aqueous 

Date Sampled: 11122/11 11122111 11122111 11122111 11117111 

Date Received: 11122111 11122111 11122111 11122111 11122111 

Units: ug/1 ug/1 ug/1 ug/1 ug/1 

Date of Analysis: 11128/11 11/28/11 11/28/11 11128/11 11/28/11 

Analyst: VG VG VG VG VG 

Method: 82608 SIM 82608 SIM 82608 SIM 82608 SIM 82608 SIM 

Dilution Factor: 

1 ,4-0ioxane 0.44 0.34 < 0.25 0.35 < 0.25 

4-Bromofluorobenzene ( surr) 98%R 99%R 99%R 99%R 99%R 

Toluene-dB (surr) 91 %R 92%R 91 %R 92%R 92%R 

eastern analytical, inc. www.eailabs.com Phone: (603) 228-0525 6 
QC REPORT 

Client: Sanborn, Head & Associates, Inc. {NH) 

Client Designation: Londonderry Town Garage 12049.03 

Parameter Name Blank LCS LCSD Analysis Date Units 

1 ,4-Dioxane < 0.25 5.0 (100 %R) 4.9 (99 %R) (1 RPO) 

4-Bromofluorobenzene (surr) 98%R 100 %R 99%R 

Toluene-dB (surr) 91 %R 91 %R 91 %R 

Samples were extracted and analyzed within holding time limits. 

Instrumentation was calibrated in accordance with the method requirements. 

The method blanks were free of contamination at the reporting limits. 

Sample surrogate recoveries met the above stated criteria. 

11/28/2011 

11/28/2011 

11/28/2011 

The associated matrix spikes and/or Laboratory Control Samples met acceptance criteria. 

There were no exceptions in the analyses, unless noted. 

ug/1 

% Rec 

% Rec 

*/! Flagged analyte recoveries deviated from the QAJQC limits. Any impact to data is addressed below. 

EAIID#: 105510 

Limits RPD Method 

70- 130 20 82608 - +• . 

70- 130 50 82608 

70- 130 50 82608 

eastern analytical, inc. www.eailabs.com Phone: (603) 228-0525 7 
• ·IAJ\.ftl LABORATORY REPORT EAI ID#: 105510 

Client: Sanborn, Head & Associates, Inc. (NH) 

Client Designation: Londonderry Town Garage 12049.03 

Sample 10: MW-2R / 11-22-11 MW-60-2 / MW-60-4 / Oup-1 / 

11-22-11 11-22-11 11-22-11 

Lab Sample ID: 105510.01 105510.02 105510.03 105510.04 

Matrix: aqueous aqueous aqueous aqueous 

Date Sampled: 11/22/11 11/22111 11/22/11 11/22111 Analytical Date of 

Date Received: 11/22/11 11/22111 11/22/11 11/22/11 Matrix Units Analysis Method Analyst 

Antimony < 0.005 < 0.005 < 0.005 < 0.005 AqTot mg/L 11/30/11 6020 OS 

Arsenic < 0.005 < 0.005 < 0.005 < 0.005 AqTot mg/L 11/30/11 6020 DS 

Barium 0.40 0.21 0.085 0.20 AqTot mg/L 11/30/11 6020 OS 

Beryllium < 0.001 < 0.001 < 0.001 < 0.001 AqTot mg/L 12/1/11 6020 OS 

Chromium < 0.005 < 0.005 < 0.005 < 0.005 AqTot mg/L 11/30/11 6020 OS 

eastern analytical, inc. www.eailabs.com Phone: (603) 228-0525 

8 
I 

QC REPORT EAIID#: 105510 

Client: Sanborn, Head & Associates, Inc. (NH) 

Client Designation: Londonderry Town Garage 1 2049.03 

Date of 

Parameter Name Blank LCS LCSD Units Analysis Limits RPD Method 

Antimony < 0.001 1.0 (101 %R) mg/L 11/30/11 80-120 20 6020 

Arsenic < 0.001 1.0 (100 %R) mg/L 11/30/11 80 - 120 20 6020 

Barium < 0.001 0.97 (97 %R) mg/L 11130/11 80 - 120 20 6020 

Beryllium < 0.0001 1.0 (102 %R) mg/L 12/1111 80 - 120 20 6020 

Chromium < 0.001 0.87 (87 %R) mg/L 11/30/11 80 - 120 20 6020 

MS/MSD MS/MSD Date of 

Parameter Name Parent ID Parent Matrix Spike MSD Units Analysis Limits RPD Method 

Antimony 105536.01 < 0.001 1.0 (101 %R) 1.0 (1 02 %R) (1 RPD) 

Arsenic 105536.01 < 0.001 0.96 (96 %R) 0.97 (97 %R) (1 RPD) 

Barium 105536.01 0.007 1.0 (99 %R) 0.99 (98 %R) (1 RPD) 

Beryllium 105662.01 < 0.0001 0.87 (87 %R) 0.90 (90 %R) (3 RPD) 

Chromium 105536.01 < 0.001 0.76 (76 %R) 0.80 (80 %R) (5 RPD) 

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. 

•f! Flagged analyte recoveries deviated from the QAIQC limits. 

eastern analytical, inc. www.eailabs. com 

mg/L 11/30/1 1 75-125 20 6020 

mg/L 11130/11 75-125 20 6020 

mg/L 11130/11 75-125 20 6020 

mg/L 12/1/11 75-125 20 6020 

mg/L 11/30/11 75-125 20 6020 

Phone: (603) 228-0525 9 
Page / of _j_ CHA IN-OF-CUSTODY R ECORD 

B oLo f iELDS R eQUIRED. P LEASE CIRCLE R EQUESTED A NALYSIS. 

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coMPANY: s n. 1{\ 6N;;:: Re~d :1 Jss.D ('_ 

Aooms: , ""'1-0 ~ c( 1 S·i . CITY: C1·(\ G () rL STATE: /V +l ZIP: [) 3.3 0 / 

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GWP, OIL f:. 8aOWHfl£lD OA OTHER: Ol ~l__L 

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PRESUMPTIVE CERTAINTY ~ EQUI! 

RELINQUISHED BY: DATE: TIHE: RECEIYED BY: 

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JKA;] eas;:;.~ .. .:~~~~ inc. 25 CHENElL DRIVEl CONCORD. NH 033011 TEL: 603_228.05251 1.800.287.05251 FAX: 603.228.459'1 E-MAIL CUSTOMER_SERVICE@EAILABS.COMI WWW_fAilABS CO~I 

(WHITE: ORIGINAL GREEN: PROJECT M A N AGER) 

, ~; 
ATTACHMENT D

DATA QUALITY/DATA USABILITY

ASSESSMENT
ATTACHMENT D

DATA QUALITY/DATA USABILITY ASSESSMENT

            

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January 2012  Page 2

DQAǦDUE.docx  2049.03

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TABLE D-1

Review of Analytical Reporting Limits, Trip Blank, and Duplicate % RPD – Groundwater

Town Garage/Radio Beacon Site – Londonderry, New Hampshire

NHDES Site No. 198509001

Concentrations in μg/l.

Trip Blank / 11-22-11 MW-2R / 11-22-11 MW-6D-4 / 11-22-11 MW-6D-2 / 11-22-11 Dup-1 / 11-22-11

11/14/11 11/22/11 11/22/11 11/22/11 11/22/11

VOCs

AVOCs

Benzene 71-43-2 5 2,000 <1 <1 <1 <1 <1 –

Butylbenzene (n-) 104-51-8 260 † <1 <1 <1 <1 <1 –

Butylbenzene (sec-) 135-98-8 260 † <1 <1 <1 <1 <1 –

Butylbenzene (tert-) 98-06-6 260 † <1 <1 <1 <1 <1 –

Ethylbenzene 100-41-4 700 3,000 <1 <1 <1 <1 <1 –

Isopropylbenzene (Cumene) 98-82-8 800 NA <1 <1 <1 <1 <1 –

Isopropyltoluene (p-) 99-87-6 260 † <1 <1 <1 <1 <1 –

Naphthalene 91-20-3 20 2,000 <5 <5 <5 <5 <5 –

Propylbenzene (n-) 103-65-1 260 † <1 <1 <1 <1 <1 –

Styrene 100-42-5 100 50,000 <1 <1 <1 <1 <1 –

Toluene 108-88-3 1,000 50,000 <1 <1 2 2 2 0%

Trimethylbenzene (1,2,4-) 95-63-6 330 3,000 <1 <1 <1 <1 <1 –

Trimethylbenzene (1,3,5-) 108-67-8 330 NS <1 <1 <1 <1 <1 –

Xylene (m,p-) 108-38-3 106-42-3 NS NS <1 <1 <1 <1 <1 –

Xylene (o-) 95-47-6 NS NS <1 <1 <1 <1 <1 –

Total Xylenes 1330-20-7 10,000 30,000 ND ND ND ND ND –

CVOCs

Carbon Tetrachloride 56-23-5 5 40 <2 <2 <2 <2 <2 –

Chlorobenzene (Monochlorobenzene) 108-90-7 100 2,000 <2 <2 <2 <2 <2 –

Chloroethane 75-00-3 NS NS <5 <5 <5 <5 <5 –

Chloroform (Trichloromethane) ¢ 67-66-3 70 100 <2 <2 <2 <2 <2 –

Chloromethane 74-87-3 30 † <2 <2 <2 <2 <2 –

Chlorotoluene (2-) 95-49-8 100 † <2 <2 <2 <2 <2 –

Chlorotoluene (4-) 106-43-4 NS NS <2 <2 <2 <2 <2 –

Dichlorobenzene (1,2-) 95-50-1 600 20,000 <1 <1 <1 <1 <1 –

Dichlorobenzene (1,3-) 541-73-1 600 † <1 <1 <1 <1 <1 –

Dichlorobenzene (1,4-) 106-46-7 75 50,000 <1 <1 <1 <1 <1 –

Dichloroethane (1,1-) 75-34-3 81 10,000 <2 7 <2 3 3 0%

Dichloroethane (1,2-) 107-06-2 5 300 <2 <2 <2 <2 <2 –

Dichloroethene (1,1-) 75-35-4 7 1,000 <1 3 <1 <1 <1 –

Dichloroethene (cis-1,2-) 156-59-2 70 NA <2 <2 <2 <2 <2 –

Dichloroethene (trans-1,2-) 156-60-5 100 1,000 <2 <2 <2 <2 <2 –

Dichloropropane (1,2-) 78-87-5 5 200 <2 <2 <2 <2 <2 –

Dichloropropane (1,3-) 142-28-9 NS NS <2 <2 <2 <2 <2 –

Dichloropropane (2,2-) 594-20-7 NS NS <2 <2 <2 <2 <2 –

Dichloropropene (1,1-) 563-58-6 NS NS <2 <2 <2 <2 <2 –

Dichloropropene (cis-1,3-) 10061-01-5 0.5 * ‡ † <2 <2 <2 <2 <2 –

Dichloropropene (trans-1,3-) 10061-02-6 0.5 * ‡ † <2 <2 <2 <2 <2 –

Hexachlorobutadiene 87-68-3 0.5 † <0.5 <0.5 <0.5 <0.5 <0.5 –

Methylene Chloride (Dichloromethane) 75-09-2 5 1,000 <5 <5 <5 <5 <5 –

Tetrachloroethane (1,1,1,2-) 630-20-6 70 † <2 <2 <2 <2 <2 –

Tetrachloroethane (1,1,2,2-) 79-34-5 2 1,000 <2 <2 <2 <2 <2 –

Tetrachloroethene (PCE) 127-18-4 5 80 <2 <2 <2 <2 <2 –

Trichlorobenzene (1,2,3-) 87-61-6 NS NS <1 <1 <1 <1 <1 –

Trichlorobenzene (1,2,4-) 120-82-1 70 1,000 <1 <1 <1 <1 <1 –

Trichlorobenzene (1,3,5-) 108-70-3 40 † <1 <1 <1 <1 <1 –

Trichloroethane (1,1,1-) 71-55-6 200 50,000 <2 <2 <2 <2 <2 –

Trichloroethane (1,1,2-) 79-00-5 5 500 <2 <2 <2 <2 <2 –

Trichloroethene (TCE) 79-01-6 5 100 <2 <2 <2 <2 <2 –

Trichloropropane (1,2,3-) 96-18-4 40 † <2 <2 <2 <2 <2 –

Vinyl Chloride 75-01-4 2 10 <2 <2 <2 <2 <2 –

Other VOCs

Acetone 67-64-1 6,000 † <10 <10 <10 <10 <10 –

Bromobenzene 108-86-1 NS NS <2 <2 <2 <2 <2 –

Bromochloromethane 74-97-5 NS NS <2 <2 <2 <2 <2 –

Bromodichloromethane ¢ 75-27-4 0.6 NA <0.5 <0.5 <0.5 <0.5 <0.5 –

Bromoform ¢ 75-25-2 4 2,000 <2 <2 <2 <2 <2 –

Bromomethane 74-83-9 10 10 <2 <2 <2 <2 <2 –

Butanone (2-) (MEK) 78-93-3 4,000 50,000 <10 <10 <10 <10 <10 –

Carbon Disulfide 75-15-0 70 † <5 <5 <5 <5 <5 –

Dibromo-3-chloropropane (1,2-) (DBCP) # 96-12-8 0.2 † <2 <2 <2 <2 <2 –

Dibromochloromethane ¢ 124-48-1 60 NA <2 <2 <2 <2 <2 –

Dibromoethane (1,2-) (Ethylene dibromide) 106-93-4 0.05 700 <2 <2 <2 <2 <2 –

Dibromomethane (Methylene bromide) 74-95-3 NS NS <2 <2 <2 <2 <2 –

Dichlorodifluoromethane 75-71-8 1,000 † <5 <5 <5 <5 <5 –

Diethyl Ether (Ethyl Ether) 60-29-7 1,400 † <5 <5 <5 <5 <5 –

Diisopropyl ether (DIPE) 108-20-3 120 † <5 <5 <5 <5 <5 –

Dioxane (1,4-) 123-91-1 3 † <50 <50 <50 <50 <50 –

Dioxane (1,4-) 123-91-1 3 † <0.25 0.44 <0.25 0.34 0.35 3%

Ethyl tertiary butyl ether (ETBE) 637-92-3 40 † <5 <5 <5 <5 <5 –

Hexanone (2-) 591-78-6 NS NS <10 <10 <10 <10 <10 –

Methyl-2-pentanone (4-) (MIBK) 108-10-1 2,000 50,000 <10 <10 <10 <10 <10 –

Methyl-t-butyl Ether (MTBE) 1634-04-4 13 10,000 <5 <5 <5 <5 <5 –

Tertiary amyl methyl ether (TAME) 994-05-8 140 † <5 <5 <5 <5 <5 –

Tertiary butyl alcohol (TBA) (tert-Butanol) 75-65-0 40 † <30 <30 <30 <30 <30 –

Tetrahydrofuran 109-99-9 154 † <10 <10 <10 <10 <10 –

Trichlorofluoromethane 75-69-4 2,000 † <5 <5 <5 <5 <5 –

Total Metals

Antimony 7440-36-0 6 NA <5 <5 <5 <5 –

Arsenic 7440-38-2 10 NA <5 <5 <5 <5 –

Barium 7440-39-3 2,000 NA 400 85 210 200 5%

Beryllium 7440-41-7 4 NA <1 <1 <1 <1 –

Chromium 7440-47-3 100 NA <5 <5 <5 <5 –

Analyte CAS

Nos. GW-1

(AGQS) GW-2 'XSOLFDWH53'

Notes:

1. Samples were collected by Sanborn Head on the dates indicated and analyzed by Eastern Analytical, Inc. (EAI) of Concord, New Hampshire for volatile organic compounds (VOCs) by United States Environmental Protection Agency

(USEPA) Methods 8260B and 8260B in selective ion monitoring (SIM) mode (low level 1,4-dioxane only), and total (unfiltered) metals by USEPA Method 6020.

2. "<" indicates the analyte was not detected above the indicated laboratory reporting limit.

3. "GW-1" and "GW-2" Groundwater Standards are from the New Hampshire Department of Environmental Services (NHDES) Contaminated Sites Risk Characterization and Management Policy (RCMP) (January 1998, with 2000 through

2007 revisions/addenda). In addition, the June 2009 and July 2011 versions of Table 1 in the NHDES Vapor Intrusion Guidance included updates to some GW-2 Groundwater Standards which have been included in this table. GW-1

Groundwater Standards are equivalent to the Ambient Groundwater Quality Standards (AGQSs) promulgated in Env-Or 600 (July 2008). "‡" indicates the value depicted is the revised AGQS which was raised in the July 2008 update to EnvOr 600. The AGQS/GW-1 Groundwater Standards are intended to be protective of groundwater as a source of drinking water. The GW-2 Groundwater Standards apply to groundwater as a potential source of indoor air contamination.

4. "AVOCs" are aromatic VOCs.

"CVOCs" are chlorinated VOCs.

"†" indicates the RCMP lists as not currently available.

"NA" indicates the RCMP lists as not applicable.

"NS" indicates the analyte is not listed in the RCMP.

"ND" indicates not detected.

"*" indicates the standard shown is for 1,3-dichloropropene (no isomer specified).

"#" indicates the standard shown is for dibromochloropropane (no isomer specified).

"¢" indicates the RCMP lists the AGQS for total trihalomethanes (bromoform, bromodichloromethane, dibromochloromethane and chloroform) shall be 80 μg/l if the groundwater is contaminated by chlorinated water supplies.

5. Bold italic reporting limits do not meet the AGQS/GW-1 Groundwater Standards. However, these are not identified as compounds of concern at this site.

Shaded values are detected concentrations. No detected concentrations exceed the AGQS/GW-1 or GW-2 Groundwater Standards.

6. Duplicate % RPD indicates the relative percent difference as calculated by the following formula:

| Result1 - Result2 | / ((Result1 + Result2) / 2) * 100

7. "–" indicates the RPD can not be calculated because one or both of the results are non-detect.

8. Refer to Sanborn Head's December 2009 Quality Assurance Project Plan for further details on data quality and data usability.

S:\CONDATA\2000s\2049.03\Source Files\2011 Annual Report\Att D - DQA\Att D Tbls.xlsx Page 1 of 1 Sanborn, Head & Associates, Inc.
TABLE D-2

Review of Analytical Laboratory QC – Groundwater

Town Garage/Radio Beacon Site – Londonderry, New Hampshire

NHDES Site No. 198509001

Lab

Batch Matrix Analyses EB EB Clean? TB TB Clean? Lab Blank Surrogates MS/MSD LCS/LCSD

VOCs 

Method 

8260B

– –

Trip Blank / 

11-22-11 Yes Clean

Within 

acceptance 

criteria

–

Carbon Disulfide LCS (69%R) low recover

2,2-Dichloropropane LCS (35%R)/LCSD (39%R) low 

Carbon Tetrachloride LCS (62%R)/LCSD (65%R) lo

1,4-Dioxane LCS/LCSD RPD (29%RPD) hi

trans-1,3-Dichloropropene LCS (69%R) low rec

VOCs 

Method 

8260B-SIM

– –

Trip Blank / 

11-22-11 Yes Clean

Within 

acceptance 

criteria

– Within acceptance c

Total

Metals

–– – – Clean – – Within acceptance c

EAI

105510 GW

Notes:1. Abbreviations/Acronyms:EAI = Eastern Analytical, Inc.GW = groundwaterEB = equipment rinseate blank sampleTB = trip blank sampleMS = matrix spike sampleMSD = matrix spike duplicate sampleLCS = laboratory control sampleLCSD = laboratory control sample duplicate%R = percent recovery%RPD = relative percent difference"

–" = not applicable

2. Refer to Sanborn Head's December 2009 Quality Assurance Project Plan for further details on data quality and data usability.

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