## DES Waste Management D i vision 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 newcompounds 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
 
Ȁ ǡ Ǥͳͻ ͅͷͲͻͲͲͳ ǣ ȋȌǡǡƬ ǡǤȋ Ȍ           
Ȁ   ȋȌ   ʹͲͳͳǤ        ȋ  ȏȐ  ǦʹȌǡȋ Ȍ       Ǧʹǡ Ǧ͸Ǧʹ ǡ  Ǧ͸ǦͶ ͳǡʹ 

## ͳǡͶǦȋȌȋǤ Ǥǡǡǡǡ ǡȌǤ Ǥ


# GROUNDWATER SAMPLING AND ANALYSIS        Ǧʹǡ  Ǧ Ǧ͸ ȋʹͶȌʹʹǡʹͲͳͳ ȋ 	ͳ  ȌǤȀ Ǧʹǡ              Ǥ       Ǧʹ       ͳ 

###  Ǧ͸ Ǧ Ǥ   ȋ          ȏȐȌ       Ǥ ȋȌ  ǡ       ǡ  ǡ  ǡ  Ǥ         ͵Ǧ  ȋȌ Ǥ      ǡ  Ǧ    Ǥ 
        Ǧ͸Ǧʹ  Ǧ͸ǦͶͳͻͻͶʹͲͲͷǤ

ʹ 

###              ͳʹǡ ʹͲͳͳ      Ǧ͸ǦʹǦ͸ǦͶ Ǥ         ͳʹǡ ʹͲͳͳ   ǡ  Ǧ͸Ǧʹ  Ǧ͸ǦͶ       Ǧ͸         ʹͲͳͳ  Ǥ Ǧ͸   Ǧǡ   ʹͲͳͳ  ǡ          ǯ  ȋͳͻͻ͸ʹͲͲͷȌǡȋǤǤǡǡ ǡȀȌǤ

### January 27, 2012  Page 2 20120127_2011_Annual_Rpt.docx  2049.03 

##   Ǥ Ǧ     ǡ    ǯʹͲͲͻȋ ȌǤ       Ǧ͸Ǧʹ   Ǧ͸ǦͶ   Ǧǡ    Ǧ    Ǥ          Ǥ     ǡ ǡ   ǡ    ȋȌǡ    ȋȌ      ͷͷ͸Ǧ ǦǤ     ʹͳͲͲǤǡǦ  Ǥ               ʹͲͳͳ      
  	        Ǥ          ͳǤ ǡǦʹ ǡ        ʹͲͳͳǤ       ͳǡͶǦ   ȋȌ  ȋǤǤǡ  ǡ ǡ ǡ ǡ  Ȍ ǦʹǡǦ͸Ǧʹǡ Ǧ͸ǦͶǤ    ͲǤʹͷȋρȀȌͳǡͶǦ ʹͲͳͳ ͳͻǡʹͲͳͳ         ǯ ȋǯȌ  Ǥ        Ǧ    ǣ

 

## VOCs ǣ ͶͲǦ ȋȌ    ̺ ǡ Ǧ   ȋȌǢ

 

## 1,4
Ǧ dioxane ǣͶͲǦ̺ǡǦǢ

 

## Metals ǣʹͲͲǦǡǦȋ ͵ 

## ȌǤ  ǡ             ǡǤȋȌǡ ǡ ǡǣ  ͅʹ͸ͲǢͳǡͶǦ  ͅʹ͸Ͳ  ȋȌ Ǣ ͸ͲʹͲǤ Ǧ Ǧ Ǥ   ǡ     ǡ      ͅʹ͸ͲͳǡͶǦ ͅʹ͸Ͳ Ǥǯ             Ǥ

### January 27, 2012  Page 3 20120127_2011_Annual_Rpt.docx  2049.03 

##               ǯʹͲͲͻȋȌǤ



# SUMMARY OF ANALYTICAL RESULTS ǡ  ȋ ȌǤ    ǡ          ȋǤǤǡ ȌǤ ʹͲͳͳ ǣ

 

## ͳǡͳǦȋͳǡͳǦȌǡͳǡͳǦȋͳǡͳǦȌǡ ͳǡͶǦ  ǦʹǤ ͳǡͳǦȋ͹ρȀȌ ȋ ͅͳρȀȌǡ ͳǡͳǦ ȋ͵ ρȀȌ    ȋ͹ ρȀȌǤ     ͳǡͳǦ ͳǡͳǦ  Ǧʹǡ  Ǧʹ ǦʹǦ͸ǡ Ǥ     Ǥ   ͳǡͶǦ ȋͲǤͶͶ ρȀȌ    Ǧʹ     
   ȋ
Ȍ ȏ͵ ρȀȐǢ ǡ     ͳͲ Ǧ͸ 

##       ͲǤ͵ͷ ρȀ ͵ 

## Ǥǡ ͶͲͲρȀ Ǧʹǡȋʹǡ ͲͲͲρȀȌǤ Ǥ

 

## ͳǡͳǦǡǡͳǡͶǦ   Ǧ͸Ǧʹǡ     ͳǡͳǦ ȋ͵ ρȀ       Ȍ         ȋ ͅͳ ρȀȌǤ    ȋʹρȀ  Ȍ      ȋͳǡͲͲͲ ρȀȌǤ     ͳǡͶǦ ȋͲǤ͵ͶρȀ ͲǤ͵ͷρȀ Ȍ   
 ȋ͵ ρȀȌǡ     ǯ ͳͲ Ǧ͸ 

##      ǤǦ͸ǦʹǢ ʹͳͲρȀ ȋʹͲͲρȀȌǡ  ȋʹǡͲͲͲρȀȌǤ

 

##            Ǧ͸ǦͶ    ȋʹ ρȀȌ   ȋͳǡͲͲͲ ρȀȌǤ Ǧ͸ǦͶǢ ͅ ͷρȀǡ ȋʹǡͲͲͲρȀȌǤ ͵ 

###  ǤʹͲͳͲǤͳǡͶǦǡ  ȋȌǤȀ͸͵ͷȀǦͲͻȀͲͲͷǦ	Ǥ ʹͲͳͲǤ

# 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͵̳	̳ʹͲͳͳ̳ʹͲͳʹͲͳ ʹ͹̴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

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### 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

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### 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

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### 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

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### 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

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### 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

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### 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 Ta bles.xlsx Page 7 of 8 Sanborn, Head & Associates, Inc.

### 7$%/( 6XPPDU\RI92&VDQG&KORULGH$QDO\ WLFDO'DWD0RQLWRULQJ:HOOV 7RZQ*DUDJH5DGLR%HDFRQ6LWH

/RQGRQGHUU\1HZ+DPSVKLUH

1+'(66LWH1R 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-6 D 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, wi th MCLs of 5 μg/l and 2 μg/l respectively.

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

### 7$%/( 6XPPDU\RI$QDO\WLFDO5HVXOWV± 6XSSOHPHQWDO*URXQGZDWHU$QDO\V HV 7RZQ*DUDJH5DGLR%HDFRQ6LWH

/RQGRQGHUU\1HZ+DPSVKLUH

1+'(66LWH1R

Concentrations in μ g/l. MW-2R MW-6D-2 MW-6D-4 05/19/10 05/19/10 Dup. 11/22/11 11/22/11 11/22/11 Dup. 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 analyz ed by Eastern Analytical, Inc. of Concord, New Hampshire for 1,4-dioxane United States Environmental Protection Agenc y (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 rep orting limit.


### 4. "GW -1" and "GW-2" Groundwater Standards are from the New Hampshire Departmen t 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 Am bient 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 Standar ds 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 Ta bles.xlsx Page 1 of 1 Sanborn, Head & Associates, Inc.

# FIGURES TAX MAP 9 TAX MAP 6TOWN GARAGEPROPERTYMW-2RMW-6D-2,4File:\\conserv1\DataShare\DATA\CONDATA\2000s\2049.03\Graphics Files\CAD\2011 Summary Report\GW_Monitoring_Locations.dwg Plot Date: 1-4-12c 2012 SANBORN, HEAD & ASSOCIATES, INC.This figure depicts the approximate locations ofthe remaining site monitoring wells MW-2R andMW-6D.Monitoring Well Location Plan2011 Annual Summary ReportGroundwater Monitoring ProgramLondonderry Town Garage/RadioBeacon SiteLondonderry, New HampshireFigure NarrativeFigure 1Date:Reviewed By:Designed By:Drawn By:T. WhiteD. Dombrowsky/E. WrightJanuary 2012S. Nerney1. This base map was prepared based on a copyof the 400 scale 2007 Town of Londonderry TaxAssessor's Map printed from the Town ofLondonderry websitewww.londonderrynh.org onAugust 8, 2007 and should be consideredapproximate. Refer to the legal property anddeeded easement descriptions for more accurateidentification of Groundwater Management Zone(GMZ) boundaries.2. The location of monitoring well MW-6D isbased on a plan entitled, "Plate 3, Location ofMonitoring Wells, Residential Wells, GeophysicalSurvey Lines and Cross-Sections", from the FinalTechnical Report of Field Investigation, HoltonCircle Remedial Investigation, Londonderry, NewHampshire, prepared by Metcalf & Eddy, Inc.,dated March 1992.3. Monitoring well MW-2R was installed byGeosearch, Inc. of Fitchburg, Massachusetts onOctober 30, 2006 as a replacement to MW-2D-6.MW-2R is included in the current groundwatermonitoring program.4. Monitoring well location MW-6D is a deepbedrock well at the site instrumented with adedicated multi-level well system. This system(installed as part of the Remedial Investigation[RI]) was designed and manufactured by SolinstLtd. (Solinst) of Ontario, Canada and includesinert gas-driven pumps, sample tubes, pressuretransducers and cables. This system is reportedlyconstructed around a 3-inch inside diameter PVCpipe that serves as a conduit for the sampletubes and transducer cables. Discrete sampleintervals are separated by inflatable packers,which contain a water-activated material inside arubber sleeve. Sanborn Head had previouslycollected groundwater samples from intervalsMW-6D-2 and MW-6D-4. MW-6D is not includedin the current groundwater monitoring program;however, sampling intervals MW-6D-2 andMW-6D-4 were included in the November 2011sampling event at the request of USEPA.NotesLegendGRAPHICAL SCALE60'120'0120'240'MW-2RMW-6D-2,4Approximate Groundwater Management Zone (GMZ) BoundaryApproximate Property BoundaryApproximate Tax Map BoundaryTax Map Lot NumberReplacement shallow bedrock monitoring well location and designation included inthe 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, themonitoring well was removed from the groundwater monitoring program and notdecommissioned. This well was included in the November 2011 sampling event atthe request of USEPA.SAN NBOR HEADS:\CONDATA\2000s\2049.03\Source Files\2011 Annual Report\MonWellPlot.xls\MW-2RSanborn, Head & Associates, Inc.0.11101001000Jan-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 Jan-09 Jan-10 Jan-11 Jan-12

&RQFHQWUDWLRQJO6DPSOH'DWHV)LJXUH&RQFHQWUDWLRQYV7LPH3ORW0:'0:57RZQ*DUDJH5DGLR%HDFRQ6LWH/RQGRQGHUU\1HZ+DPSVKLUH1,1,1-TCA1,1-DCA1,1-DCE1,1,1-TCA Cleanup Goal (200)1,1-DCA Cleanup Goal (81)1,1-DCE Cleanup Goal (7)MW-2R InstalledMonitoring well MW-2D-6 was replaced by monitoringwell MW-2R on October 30, 2006. Data points shownfrom January 1994 through December 2005 reflect samplescollected from monitoring well MW-2D-6. Data pointsshown after January 2006 reflect samples collected frommonitoring well MW-2R.Data points plotting at 0.1 ug/L represent concentrationsbelow laboratory reporting limitsNote: ND = 0.1μg/l.S:\CONDATA\2000s\2049\2005 Report\MonWellPlots.xlsSanborn, Head & Associates, Inc.0.11101001000Jan-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 Jan-09 Jan-10 Jan-11 Jan-12

&RQFHQWUDWLRQJO6DPSOH'DWHV)LJXUH7RZQ*DUDJH5DGLR%HDFRQ6LWH/RQGRQGHUU\1HZ+DPSVKLUHConcentration vs. Time Plot0:'1,1,1-TCA1,1-DCA1,1-DCE1,1,1-TCA Cleanup Goal (200)1,1-DCA Cleanup Goal (81)1,1-DCE Cleanup Goal (7) 

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# ATTACHMENT A
LIMITATIONS 

# A TTACHMENT 

# A L IMITATIONS
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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: Londo nderry, New Hampshire November 22, 2011

1. Field screening parameters w ere generally monitored approxi mately every five minutes during purging. After the field parameters stabilized, groundwat er samples were collected. Indi cated field parameters were the last stabilized values recorded prior to sample collection. 2. Groundwater level measurement was obtained using a QED MP30 electronic water leve l meter. The well was purged and sampled using a 3⁄4

- inch diameter bladder pump at fl ow 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 measuremen t was obtained using previously

- installed Geokon, Inc. vibrati ng wire pressure transducer and a Geokon, Inc. GK -401 readout box. The well was purged and sampled using previo usly-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 u sing the Geokon are approx imately 30 feet lower than historical values for MW -6D-2, suggesting that the pressu re transducer permanently inst alled in the well may be malfunctioning. 6. The pressure transducer installed in MW-6D-4 was not operational at the time of measurement. T he 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 samplin g 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

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. \ ,l 'i u.:;r :/ , t.' t , t i t r · ; t, 1:

.



### Tim White Sanborn, Head 

### & Associates , Inc. (NH) 20 Foundry Street Concord NH 03301

Subject: Laboratory Report Eastern Analytical , Inc. I D : 105510 Client Identification: Londonderry Town Garage 12049.03 Date Received : 11/22/2011
Report r evision/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

. (EA I ) were collected in accordance with approved EPA procedures

. Eastern Analytical, I nc

. 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 samp l es 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 (P H -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 i n 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 , 

# LJj tjft
Date 

# \0 #of pages (excluding cover letter) W

ll '\

l
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. co m I I I ! I '**~** ... I

# S AMPLE CO NDITI O N S PAGE EAIID#: 105510

Client: Sa n bo rn , H ead & 

### Associates , I nc. (NH) Client Designation : L o n do n de r ry T own Ga r age 

## I 20 4 9.0 3

Temperature upon r eceip t ( 0 

### C): 

# 4
. 7 Received on ice o r co l d packs (Yes/ N o): 

## y Acceptab l e temperature range (" C ): 0-6 Date Date Sample %Dry LabiD Sample 10 Received Sampled Matrix Weight Exceptions/Comments (other than thermal preservation) 105510

. 0 1 MW

- 2R /11-22-11 11/22/ 11 11/22/11 aqueous Adheres to Samp l e Acceptance Policy
105510

. 02 MW-60-2/11-22

- 11 11/22/11 11/22/11 aq u eous Adheres to Samp le Acceptance Policy
10 5510

. 03 MW

- 60-4 I 11 -22- 11 11/22/11 11/22/11 aqueous Adhe r es to Samp l e Acceptance Policy
10 55 1 0

. 0 4 Oup-1 /11-22
· 11 1 1/22/1 1 11/22/11 aqueous Adheres to Samp l e Acc e ptance Policy
1 05510

. 05 T rip Blank /1 1 -22-11 11/22/1 1 11/14/11 aq ueous Adheres to Samp l e Acceptance Policy
1 05510

. 06 Trip Blank /1 1 -22-11 11/22/1 1 11/17/11 aqueous Adheres to Samp l e 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, 1 9th Edition, 1995; Microbiology, 20th Edition , 1998 3) Test Methods for Evaluating Solid Wast e SW 846 3rd Edition including updates IVA and /V B 4) Hach W ater Analysis Handbook, 2nd edition, 1992 

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

## 1

## "

I 

# lllAAI LABORATOR Y REPORT EAIID#: 

## 105510

Client: San b o rn , H ead 

### & A ssoc i a t es, Inc

. (N H ) Client Designation : L o n do nd e rry T ow n G a rag e 1 2049

. 0 3
Samp l e I D: 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 D ate Samp l ed: 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 Ana l ysis: 11124/11 11124/11 11124/11 11124/11 11/24/11 A n alyst: BAM BAM BAM BAM BAM M e t ho d : 8260B 82608 8260B 82608 8260B Dilutio n 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 A l coho l (TBA) < 30 < 30 < 30 < 30 < 30 Methy l ene 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

- 0 i chloroethane 

### 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 Bromoch l oromethane <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

- 0 i chloroethane <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

- 0 i chloropropane <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, He ad 

### & Associates, Inc. (NH) Client Designat i on : 

### Londonderry Town Garage 

## I 2049.03
Samp le 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 Samp l ed: 11122/11 11122111 11122111 11122111 11114111 Date Received: 11122/11 11122111 11122111 11 1 22111 11122111 Units: ug/1 ugll ugll ugll ugll Date o f Analysis: 11124 1 11 11124111 11124111 11 1 2411 1 11124111 Analyst: BAM BAM BAM BAM BAM M ethod: 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- Tetrach l oroethane <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-Trimethy l benzene < 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- T richlorobenzene < 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

- T richlorobenzene < 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 10 3 %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

. ea i labs

. 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: Sa nborn, H ead 

### & Associates, In c. (NH) Client Designation : Lond o nde rry Town Garage 12049 .03

Paramete r Name Blank L CS L CSD Analysis Date Units
1,1 , 1,2- Tetrachloroethane <2 16 (81 %R) 16 (82 %R) (1 RPD) E thylbenze ne < 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) l soPropylbenzene < 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-Ch l orotoluene <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 -Trim ethylbenzene < 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-Tr i chlorobenzene < 1 17(87%R) 18 (89 o/oR) (2 RPD) 1 ,2,4 -Tr ichlorobenzene < 1 19 (93 %R) 19 (94 %R) (1 RPD) Hexachlorobutadiene < 0.5 15 (75 %R) 16 (79 %R) (5 RPD) Naphtha l ene <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 surroga t e 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 11/23/201 1 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

Li m it s 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#: 1 05510

Client: 

### Sanborn, Head 

### & Associates, Inc

. (NH) Client Designation : 

### Londonderry Town Garage 

## I 2049.03
Samp le 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 T own 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 LABOR A T O R Y REP O RT EAI I D#: 105510

C li en t: Sa n bo rn , H ea d 

### & A ssoc i ates, In c. ( N H) C lie nt Des i gnat i on : Lo n donde r ry T ow n Gar a g e 12 0 49.03

Sample 10: M W-2 R / 11

- 22

- 11 M W -60-2 / M W -60-4 / O up - 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 aqu e o u s Date Sampled: 11/22/11 11/22111 11/22/11 11/22111 Analytical Date of D a t e Received : 11/22/11 11/22111 11/22/11 11/22/11 Matrix U n i ts A n alysis Method Ana l yst 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. 4 0 0 .2 1 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.e a ilabs

. c om Phone: (603) 228-0525 

# 8I 

# QC REPORT EAIID#: 105510

Client: Sanborn , Head & A s s o ciates , Inc

. (NH) Client Desi g n a tion : Londonderry Town Garage 1 

### 2049

. 03

Date of Parameter Name Blank LCS LCSD Uni ts 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

. 000 1 1.0 (102 %R) mg/L 12/1111 80

- 120 20 6020 Chromium < 

### 0

. 00 1 0.87 (87 %R) mg/L 11/30/11 80

- 120 20 6020

MS/MSD MS/MSD Date of Parameter Name Parent ID Parent Matri x Sp i ke MSD Unit s Analysis Limits RPD Me t hod
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 resul t s p age. Instrumentation was calibrated in acco r dance 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 sta t ed criteria

. Exceptions to th e above statements are flagged or noted above or on the QC Narra t ive page. •f! Flagged ana l yt e r e coveries deviated from the Q AI Q C l imits

.


# 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/ 1 1 75-125 20 6020 mg/L 1 2/1/ 1 1 75-125 20 6020 mg/L 11/30/ 11 75- 1 25 20 6020

Phon e : ( 6 03) 228-0525 

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##     ȋȌ         ȋ͸ͻΨǢ  ǣ ͹ͲǦͳ͵ͲΨȌ    ͅʹ͸Ͳ  Ǥ               Ǣ ǡȋͷȏρȀȐȌ      ʹ 

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### January 2012  Page 2 DQA

Ǧ DUE.docx  2049.03 

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## ȋȌ ͳǡͶǦ ȋʹͻΨǢǣʹͲ ΨȌ ͅʹ͸Ͳ Ǥǡ ͅʹ͸Ͳ  ȋȌǡǤ  ͅʹ͸ͲǦ Ǥ

 

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## Ǥ

 

##        ȋǦ͸ǦʹȀͳͳǦʹ ʹǦͳͳ Ǧ ͳȀͳͳǦʹʹǦͳͳȌǤ

 

##     ǡ    Ǧ  Ǧͳǡ͵Ǧ ǡ ͳǡʹǦ ǡ  ͳǡʹǦ      Ȁ
Ǧͳ Ǣǡ  Ǥ   Ȁǡ         ȋǤǤǡ        Ǧ ȌǤ
ǣ̳̳ʹͲͲͲ̳ʹͲͶͻǤͲ͵̳	̳ʹͲͳͳ̳ Ǧ̳ǦǤTABLE 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 μ g/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-) (Ethyle ne 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 e ther (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-) (MIB K) 108-10-1 2,000 50,000 <10 <10 <10 <10 <1 0

–

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 'XSOLFDWH 53'

Notes: 1. Samples were collected by Sanborn Head on the dates indicated and analyz ed by Eastern Analytical, Inc. (EAI) of Concord, New Hampshire for volatil e organic compounds (VOCs) by United States Environmental Protection Age ncy (USEPA) Methods 8260B and 8260B in selective ion monitoring (SIM) mode (lo w level 1,4-dioxane only), and total (unfiltered) metals by USEPA Method 6 020. 2. "<" indicates the analyte was not detected above the indica ted laboratory reporting limit. 3. "GW -1" and "GW-2" Groundwater Standards are from the New Hampshire Departmen t of Environmental Services (NHDES) Contaminated Sites Risk Characteriz ation and Management Policy (RCMP) (January 1998, with 2000 through 2007 revisions/addenda). In addition, the June 2009 and July 2011 versions of T able 1 in the NHDES Vapor Intrusion Guidance included updates to some GW-2 G roundwater Standards which have been included in this table. GW-1 Groundwater Standards are equivalent to the Ambient Groundwater Quality Standards (A GQSs) promulgated in Env-Or 600 (July 2008). "‡" indicates the value depicted is the revised AGQS which was raised in the Jul y 2008 update to EnvOr 600 . The AGQS/GW-1 Groundwater Standards are intended to be protective of gro undwater as a source of drinking water. The GW-2 Groundwater Standards app ly 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 speci fied). "#" indicates the standard shown is for dibromochloropropane (no isomer spec ified). "¢ " indicates the RCMP lists the AGQS for total trihalomethanes (bromoform, bromodichloromethane, dibromochlo romethane and chloroform) shall be 8 0 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. Howeve r, these are not identified as compounds of concern at this site.

Shaded values are detected concentrations. No detected concentrations exceed t he AGQS/GW-1 or GW-2 Groundwater Standards. 6. Duplicate % RPD indicates the relative percent difference as calculated by the follo wing formula: | Result1 - Result2 | / ((Result1 + Result2) / 2) * 100 7. "

– " indicates the RPD can not be calculated because one or both o f the results are non-detect. 8. Refer to Sanborn Head's December 2009 Quality Assurance Pro ject 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-2Review of Analytical Laboratory QC – GroundwaterTown Garage/Radio Beacon Site – Londonderry, New HampshireNHDES Site No. 198509001LabBatchMatrix Analyses EBEBClean?TBTBClean?LabBlankSurrogates MS/MSD LCS/LCSDVOCsMethod8260B– –Trip Blank /11-22-11Yes CleanWithinacceptancecriteria–Carbon Disulfide LCS (69%R) lowrecovery (acceptable = 70-130%R)2,2-Dichloropropane LCS (35%R)/LCSD (39%R) low recovery (acceptable = 70-130%R)Carbon Tetrachloride LCS (62%R)/LCSD (65%R) low recovery (acceptable = 70-130%R)1,4-Dioxane LCS/LCSD RPD (29%RPD) high (acceptable = 20%RPD)trans-1,3-Dichloropropene LCS (69%R) low recovery (acceptable =70-130%R)VOCsMethod8260B-SIM– –Trip Blank /11-22-11Yes CleanWithinacceptancecriteria–Within acceptance criteriaTotalMetals–– – –Clean– –Within acceptance criteriaEAI105510GWNotes: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 applicable2.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.xlsxPage 1 of 1Sanborn, Head & Associates, Inc.