2007 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 

Prepared by

Sanborn, Head & Associates, Inc. 

File 2049.01 

January 2008 
January 23, 2008 

File No. 2049.01 

Sherilyn B. Young, Esq. 

Rath, Young and Pignatelli, P.A. 

P.O. Box 1500 

Concord, NH 03302-1500 

Re: 2007 Annual Summary Report - Groundwater Monitoring Program 

Town Garage/Radio Beacon Site 

Londonderry, New Hampshire 

NHDES Site No. 198509001 

Dear Sherry: 

On behalf of the Town of Londonderry (Town), Sanborn, Head & Associates, Inc. (SHA) has 

completed the year 2007 groundwater quality monitoring round at the Town Garage/Radio 

Beacon Site (Site). This work has been completed in accordance with the Unilateral 

Administrative Order (UAO) issued to the Town in September 1996 by the United States 

Environmental Protection Agency (USEPA); a Statement of Work (SOW) that defines the 

scope of groundwater quality monitoring to be completed at the Site was included in the UAO. 

Further, the monitoring program has been carried out under the auspices of Groundwater 

Management Permit (GMP) No. GWP-198509001-L-003 issued to the Town by the New 

Hampshire Department of Environmental Services (NHDES), effective October 10, 1997 and 

last revised November 26, 2007. 

Based on observed water quality conditions at Site wells, and in accordance with the periodic 

review and modification provision in the SOW, Revised Amendment No. 2 to the SOW, dated 

June 2, 2006 (approved by USEPA on June 12, 2006) was prepared to remove select 

monitoring and residential water supply wells from the GMP sampling program, decommission 

six additional monitoring wells and install one replacement monitoring well. Replacement 

monitoring well MW-2R was installed October 30, 2006 as a replacement to monitoring well 

MW-2D-6. The well installation was summarized in the Site’s 2006 Annual Summary Report 

dated January 31, 2006.

From October 9 to 12, 2007 two shallow overburden monitoring wells (MW-2S and MW-5S), 

and four bedrock monitoring wells (MW-2D, MW-3D, MW-4D, MW-8D) were 

decommissioned at the Site in accordance with amended SOW, by Geosearch, Inc. 

(Geosearch) of Fitchburg, Massachusetts. The work performed by Geosearch was observed 

and documented by SHA. Documentation of well decommissioning activities is included in 

Attachment A. Shallow bedrock well MW-2R is the only well remaining in the Groundwater 

Monitoring Program. 
Town of Londonderry 

2049.01 \ 2007 Annual Rpt.doc 

January 23, 2008 

Page 2 

GROUNDWATER SAMPLING AND ANALYSIS 

One groundwater sample was collected from monitoring well MW-2R on November 9, 2007. 

Prior to purging/sampling monitoring well MW-2R, the groundwater level in the well was 

measured with an electric water level meter. Historical water level data are summarized in 

Table 1. 

The groundwater sample from monitoring well MW-2R was collected using a portable 

submersible bladder pump. Low-flow sampling techniques were used, as described in SHA’s 

November 1996 “Groundwater Sampling and Quality Assurance Plan, Town Garage/Radio 

Beacon Site, Londonderry, New Hampshire.” Water quality parameters including temperature, 

pH, specific conductance, and dissolved oxygen were monitored during purging using an YSI 

Model 556 MPS multi-parameter water quality meter with an in-line flow cell. Upon parameter 

stabilization, the in-line flow cell was disconnected and a groundwater sample collected. A 

summary of stabilized water quality parameter data for the November 2007 round is presented 

on the Groundwater Quality Field Sampling Summary form included in Attachment B. 

Historical water quality parameter data are summarized in Table 1. 

Groundwater samples were placed in 40-milliliter (ml) glass vials with Teflon® septa, which 

were provided, pre-cleaned and pre-preserved with hydrochloric acid (HCl), by the analytical 

laboratory. Following collection, sample containers were stored in coolers packed with ice and 

delivered to Eastern Analytical, Inc. (EAI) of Concord, New Hampshire, a New Hampshire 

certified laboratory, for volatile organic compound (VOC) analysis by USEPA Method 8260B 

using the NHDES Petroleum and Hazardous Waste Remediation Full List of Analytes 

(NHDES Full List). Samples were handled and transported following standard chain-ofcustody procedures. A trip blank, prepared beforehand by EAI, was also analyzed for VOCs 

by USEPA Method 8260B. Copies of EAI’s analytical laboratory data reports for these 

monitoring rounds are included in Attachment C. 

SUMMARY OF ANALYTICAL RESULTS

The November 2007 groundwater quality monitoring results for monitoring well MW-2R 

indicate similar compounds as those previously observed at monitoring well MW-2D-6. 

Specifically, 1,1-dichloroethane (1,1-DCA), 1,1-dichloroethene (1,1-DCE), and 1,1,1-

trichloroethane (1,1,1-TCA) were the only VOCs detected in the sample from MW-2R. There 

was only one exceedance of groundwater cleanup levels, namely 1,1-DCE at a concentration of 

14 μg/l. The concentrations of these VOCs observed for the November 2007 round are lower 

than the results for the two prior rounds that included well MW-2R, and compared to the 

historical results for MW-2R and MW-2D-6, are the lowest detected to date for this monitoring 

location.

The water quality analytical database for Site monitoring wells is presented in Table 2. A 

concentration versus time plot for VOCs for MW-2D-6 and MW-2R is presented as Figure 2. 

Constituent-specific cleanup levels established for the Site are indicated on the concentration 

versus time plot. 
Sanborn, 

Head and 

Associates, 

Inc.

Digitally signed by Sanborn, 

Head and Associates, Inc. 

DN: cn=Sanborn, Head and 

Associates, Inc., o=Sanborn, 

Head and Associates, Inc., ou, 

email=lsmith@sanbornhead.

com, c=US 

Date: 2008.01.24 14:30:35 

-05'00'
TABLES 
TABLE 1

Summary of Elevations and Field Screening - Monitoring Wells & Residential Wells

Town Garage / Radio Beacon Site

Londonderry, New Hampshire

Sampling

Location

Sampling

Date

Ground

Surface

Elevation

(Feet MSL)

Reference

Point

Elevation

(Feet MSL)

Groundwater 

Elevation 

(Feet MSL)

Temperature 

(°C)

Specific 

Conductance 

(ȝs/cm)

Dissolved 

Oxygen (mg/l)

pH 

(Standard 

Units)

Monitoring Wells

11/26/96 357.60 9.0 2,910 8.3 6.7

11/20/97 354.27 11.7 4,160 6.5 5.8

01/01/98

11/22/99 351.45 12.2 1,080 3.3 6.1

12/06/00 352.00** 9.0** 1,500** 7.8** 5.8**

11/19/01 348.72 13.1 2,870 7.7 5.8

11/15/02 352.09 13.1 775 3.7 6.0

11/04/03 352.20 13.0 560 9.8 6.1

11/03/04 349.84 13.8 1,200 3.8 5.6

11/28/05 352.51 10.3 1,350 4.9 5.5

11/27/96 337.65 6.8 7,700 5.7 6.7

11/20/97 336.20 7.9 5,750 1.5 6.3

11/10/98 335.44 8.4 7,590 5.3 6.3

11/23/99 335.54 11.7 6,620 1.2 6.5

11/21/00 335.93 9.3 6,900 7.8 6.5

11/19/01 333.81 10.7 6,730 0.0 6.4

11/15/02 334 69 11 4 6 380 0 1 6 4

†† 201.77

359.29 361.79

Monitoring Well Destroyed

356.35 356.04

MW-2S

MW-2D-2

11/15/02 334.69 11.4 6,380 0.1 6.4

11/04/03 335.83 9.7 7,130 0.0 6.9

11/04/04 334.50 10.5 7,220 0.6 6.5

11/28/05 336.11 10.3 7,260 0.2 6.4

11/27/96 351.95 6.9 29,100 2.9 6.9

11/20/97 345.42 8.2 29,600 3.0 6.5

11/10/98 347.87 8.9 37,600 8.4 6.7

11/23/99 344.87 12.5 26,200 0.7 6.7

11/21/00 349.08 10.4 23,600 2.2 6.8

11/19/01 343.97 11.6 22,500 0.0 6.7

11/15/02 348.10 13.3 16,500 0.0 6.7

11/04/03 348.76 10.2 15,800 0.1 7.2

11/04/04 346.78 11.5 15,100 0.7 7.0

11/29/05 349.23 12.3 13,900 0.2 7.0

11/13/06 351.99 12.5 13,700 0.5 7.0

12/11/06 351.56 8.8 14,700 0.8 6.9

11/09/07 352.07 12.9 12,500 0.3 6.8

11/26/96 334.69 6.9 12,900 0.2 6.9

11/20/97 333.65 8.9 12,200 1.9 7.3

11/09/98 333.33 8.5 11,800 0.2 7.6

11/22/99 334.17 10.1 9,790 0.6 7.6

11/17/00 334.47 9.9 9,000 0.5 7.5

11/19/01 333.00 10.1 8,550 0.3 7.4

11/14/02 333.79 10.0 8,940 † 7.5

11/05/03 334.44 9.1 8,300 0.3 7.5

11/03/04 333.98 9.7 7,930 0.3 7.3

11/28/05 335.08 8.7 7,480 0.6 7.2

†† 315.77

339.72 341.54

355.99 355.69

MW-2D-6

MW-3D

MW-2R 

Installed 

10/30/06

S:\CONDATA\2000s\2049.01\Originals\2007 Annual Report\Tables.xls Page 1 of 4 Sanborn, Head & Associates, Inc.
TABLE 1

Summary of Elevations and Field Screening - Monitoring Wells & Residential Wells

Town Garage / Radio Beacon Site

Londonderry, New Hampshire

Sampling

Location

Sampling

Date

Ground

Surface

Elevation

(Feet MSL)

Reference

Point

Elevation

(Feet MSL)

Groundwater 

Elevation 

(Feet MSL)

Temperature 

(°C)

Specific 

Conductance 

(ȝs/cm)

Dissolved 

Oxygen (mg/l)

pH 

(Standard 

Units)

11/25/96 345.71 6.4 58,600 2.6 7.0

11/20/97 343.06 6.1 40,500 2.3 5.9

11/10/98 344.44 7.9 35,400 0.0 6.7

11/23/99 344.66 12.5 31,400 1.1 6.3

11/21/00 345.81 7.4 28,200 4.1 6.7

11/20/01 344.16 8.0 28,100 0.8 6.4

11/15/02 344.06 11.9 23,700 0.0 6.9

11/04/03 346.72 6.2 23,600 0.7 6.7

11/04/04 344.19 8.6 21,100 0.7 6.5

11/29/05 347.79 10.6 19,900 0.7 6.4

11/25/96 372.18 7.5 3,400 2.5 7.0

11/20/97 370.26 7.2 19,400 2.1 6.7

11/10/98 370.26 7.1 19,000 0.3 7.2

11/23/99 370.83 11.8 14,570 0.6 7.3

11/21/00 371.18 8.1 12,900 3.3 7.3

11/20/01 368.40 9.0 11,900 0.9 7.2

11/15/02 369.64 10.9 11,000 0.1 7.2

11/04/03 368 67 8 2 11 500 0 3 7 7

384.24 343.24

384.24 309.74

MW-4D-3

MW-4D-2

11/04/03 368.67 8.2 11,500 0.3 7.7

11/04/04 369.30 9.3 11,300 0.7 7.3

11/29/05 371.63 9.9 11,400 0.2 7.3

11/25/96 373.06 7.9 19,100 2.2 7.0

11/20/97 370.26 9.4 12,000 4.9 5.2

11/10/98 370.44 9.1 18,900 1.4 5.9

11/23/99 372.22 13.6 16,500 0.6 6.0

12/06/00 372.67** 9.5** 11,000** 1.3** 5.9**

11/20/01 369.69 9.7 16,100 0.1 6.0

11/15/02 370.15 11.6 14,300 0.4 5.9

11/04/03 372.57 10.1 12,000 1.3 6.2

11/04/04 371.66 9.4 14,400 0.8 6.2

11/29/05 373.90 11.0 13,500 0.6 6.2

11/25/96 376.86 6.9 17,700 3.8 7.0

11/20/97 373.36 8.1 14,100 2.2 5.9

11/10/98 372.88 7.9 18,500 1.2 6.6

11/23/99 373.66 12.6 15,370 2.3 6.5

11/21/00 374.24 8.6 15,200 5.0 6.5

11/26/96 333.00 7.9 20,700 2.9 7.0

11/20/97 * 7.7 20,200 2.6 6.3

11/09/98 * 8.1 19,100 2.9 7.3

11/22/99 331.39 10.0 15,210 0.4 7.2

11/17/00 331.64 9.3 12,600 0.6 7.4

11/19/01 330.36 9.4 12,000 0.8 7.2

11/14/02 330.79 10.1 13,000 † 7.3

11/05/03 331.54 8.5 11,200 1.0 7.4

11/03/04 330.31 9.5 10,400 0.4 7.4

11/28/05 331.66 9.1 8,640 0.0 7.3

MW-6D-2 338.35 241.28

MW-5S 383.00 385.00

MW-5D-4 382.63 327.53

S:\CONDATA\2000s\2049.01\Originals\2007 Annual Report\Tables.xls Page 2 of 4 Sanborn, Head & Associates, Inc.
TABLE 1

Summary of Elevations and Field Screening - Monitoring Wells & Residential Wells

Town Garage / Radio Beacon Site

Londonderry, New Hampshire

Sampling

Location

Sampling

Date

Ground

Surface

Elevation

(Feet MSL)

Reference

Point

Elevation

(Feet MSL)

Groundwater 

Elevation 

(Feet MSL)

Temperature 

(°C)

Specific 

Conductance 

(ȝs/cm)

Dissolved 

Oxygen (mg/l)

pH 

(Standard 

Units)

11/26/96 * 7.8 11,000 2.9 6.9

11/20/97 * 8.1 19,100 2.0 6.8

11/09/98 * 7.8 19,800 0.5 7.1

11/22/99 * 11.6 11,780 0.4 7.2

11/17/00 * 10.0 11,300 0.4 7.3

11/19/01 * 10.1 13,200 0.0 7.1

11/14/02 * 10.3 12,300 † 7.2

11/05/03 * 7.6 7,300 0.3 7.5

11/03/04 * 9.9 7,080 0.1 7.2

11/28/05 * 9.0 3,530 0.3 7.3

11/27/96 339.69 9.7 24,400 6.5 7.0

11/20/97 336.95 10.8 19,700 0.1 7.3

11/09/98 337.35 12.0 16,200 0.0 7.5

11/22/99 338.23 13.1 14,930 0.6 7.4

11/17/00 339.08 12.9 11,800 0.3 7.1

11/19/01 336.46 11.8 10,800 0.0 7.5

11/14/02 338.53 11.0 9,790 0.1 7.3

11/04/03 339 45 11 5 8 400 0 4 7 5

MW-8D 357.16 359.15

MW-6D-4 338.35 309.28

11/04/03 339.45 11.5 8,400 0.4 7.5

11/03/04 338.28 11.5 8,650 0.2 7.5

11/28/05 339.45 11.6 8,000 1.5 8.2

Residential Wells

11/20/97 - - - 2.4 2,930 + 6.3

11/18/99 - - - 7.9 1,033 + 6.6

11/20/97 - - - 10.7 950 + 7.5

11/27/99 - - - 11 1,240 + 7.5

MW-16D 11/18/99 - - - 6.9 533 + 6.9

11/20/97 - - - 4.1 1,680 + 6.3

11/18/99 - - - 6.8 1,944 + 6.6

11/20/97 - - - 3.3 2,510 + 6.0

11/18/99 - - - 6.8 8,980 + 6.5

11/16/01 - - - 17.2 3,310 + 6.3

11/04/03 - - - 8.5 980 + 6.6

11/28/05 - - - 10.5 340 + 6.6

11/20/97 - - - 3.4 500 + 6.4

11/18/99 - - - 6.2 446 + 7.3

11/16/01 - - - 17.4 420 + 7.0

11/04/03 - - - 8.9 430 + 7.4

11/28/05 - - - 10.6 490 + 7.5

11/20/97 - - - 3.3 550 + 6.5

11/22/99 - - - 14.5 545 + 6.9

11/20/97 - - - 1.9 590 + 6.4

11/18/99 - - - 8.2 660 + 6.7

11/20/01 - - - 8.3 860 + 6.2

11/04/03 - - - 9.5 960 + 7.2

11/28/05 - - - 12.1 560 + 6.8

MW-23D

MW-14D

MW-15D

MW-18D

MW-22D

MW-19D

MW-20D

S:\CONDATA\2000s\2049.01\Originals\2007 Annual Report\Tables.xls Page 3 of 4 Sanborn, Head & Associates, Inc.
TABLE 1

Summary of Elevations and Field Screening - Monitoring Wells & Residential Wells

Town Garage / Radio Beacon Site

Londonderry, New Hampshire

Notes:

1. Groundwater levels and water quality field screening parameters were measured by SHA on the dates indicated.

2. Groundwater level measurements in overburden and bedrock monitoring wells were obtained with either a Slope Indicator Company or

a QED Environmental Systems electric water level meter. Groundwater level measurements in multi-level monitoring wells were obtained

using previously-installed Geokon, Inc. vibrating wire pressure transducers and a Geokon, Inc. GK-401 readout box.

3. Water quality parameters obtained for monitoring wells in November 1996, 1997, and 1998 were measured in an in-line flow cell using

an O.I. Analytical Aqua-CheckTM Water Analyzer; in November 1999 were measured in an in-line flow cell using an Orion Model 830

dissolved oxygen meter, an Orion Model 130 conductivity meter, and an Orion Model 260 pH meter; and in November/December 2000,

November 2001, November 2002 (pH, temperature, and specific conductance), November 2003, and November 2004 were measured

using a YSI Model 600XLM multi-parameter water quality meter with in-line flow cell; and, in November 2005, November and December

2006, and November 2007 were measured using a YSI Model 556MPS multi-parameter water quality meter with in-line flow cell. In

November 2002 dissolved oxygen was measured using a YSI 85 dissolved oxygen meter, located within a separate flow cell; the flow cell

containing the dissolved oxygen probe was connected in series and upstream of the flow cell containing the pH, specific conductance, and

temperature probes, as described in U.S. Environmental Protection Agency Region I, Low Stress (low flow) Purging and Sampling

Procedure for the Collection of Ground Water Samples from Monitoring Wells, July 30, 1996, Revision 2.

4. Water quality parameters obtained for residential wells in November 1997 were measured using an Extech Oyster pH/conductivity

probe, in November 1999 and 2001 using a Cole Parmer pH/Con Series 10 meter, and in November 2003 and 2005 using a Hanna HI

991301 portable pH/EC/TDS/Temperature meter.

5. Groundwater level measurements were referenced to the top of steel casing elevation for the overburden and bedrock monitoring wells

and to the pressure transducer elevation in multi-level monitoring wells. Groundwater level measurements in MW-2R were referenced to

top of PVC. Elevations are presented in feet above mean sea level (MSL).

6. Parameters reported for monitoring wells represent values obtained after parameter measurements stabilized; and for residential wells,

represent values obtained after allowing the water to run for approximately 15 minutes to purge stagnant water from the piping system.

7. "*" indicates that the pressure transducers installed in MW-6D-2 and MW-6D-4 were not operational at the time of measurement.

"†" indicates that the dissolved oxygen probe was not operational at the time of measurement.

"††" indicates that ground surface elevation in the vicinity of monitoring well MW-2D was altered during construction of the

Saddleback residential neighborhood in 1997/1998.

"**" indicates measurement from December 6, 2000 when well was resampled because the initial sample collected on November 16,

2000 was analyzed by the laboratory past its holding time.

"-" indicates that water level was not measured in the residential wells.

"+" indicates that dissolved oxygen was not measured in groundwater from these wells.

8. The ground surface and reference elevations indicated for MW-2S are for the replacement well installed on November 18, 1999 by

Capital Environmental Drilling, Inc. of Dunbarton, New Hampshire. Prior to the installation of the replacement well, the ground surface

and reference elevations for MW-2S were 359.29 feet and 361.79 feet, respectively.

9. Prior to the 2001 sampling round, Amendment No. 1 to the Statement of Work (SOW) was approved by USEPA allowing sampling

locations MW-5D-4, MW-12D, MW-14D, MW-15D, MW-16D, MW-18D, and MW-22D to be dropped from the groundwater monitoring

program.

10. Prior to the 2006 sampling round, Revised Amendment No. 2 to the SOW was approved by USEPA allowing sampling locations MW2S, MW-2D-2, MW-2D-6, MW-3D, MW-4D-2, MW-4D-3, MW-5S, MW-6D-2, MW-6D-4, MW-8D, MW-19D, MW-20D, and MW23D to be dropped from the groundwater monitoring program.

11. Monitoring well MW-2R was installed on October 30, 2006 as a replacement to monitoring well MW-2D-6.

S:\CONDATA\2000s\2049.01\Originals\2007 Annual Report\Tables.xls Page 4 of 4 Sanborn, Head & Associates, Inc.
TABLE 2

Summary of VOCs and Chloride Analytical Data - Monitoring Wells

Town Garage / Radio Beacon Site

Londonderry, New Hampshire

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

Nov-90 440 BDL BDL BDL 

05/09/94 257 BDL BDL BDL 2.20 - THM

11/03/94 NS BDL BDL BDL 4.20 - THM

04/26/95 192 BDL BDL BDL 2.5 - THM

11/01/90 NS BDL BDL BDL 

05/09/94 833 BDL BDL BDL

12/06/94 797 BDL BDL BDL

04/26/95 810 BDL BDL BDL

Nov-90 3,410 74 18 790

05/11/94 1,682 59 15 200

11/03/94 1,170 150 29 450

04/21/95 1,211 78 25 200

10/12/95 2,440 150 31 410 14 - MTBE

05/02/96 760 30 6.7 79

11/26/96 NS 23 4 59

11/20/97 NS 33 8 81

Replacement Well

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

12/06/00 NS 4 1 9

11/19/01 NS 6 2 12 8 THM

Date

MW-1S

MW-1D

MW-2S

11/19/01 NS 6 2 12 8 - THM

11/15/02 NS BDL BDL BDL

11/04/03 NS BDL BDL BDL 5 - THM

11/03/04 NS BDL BDL BDL

11/28/05 NS BDL BDL BDL

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

04/20/95 5,749 100 9.1 7.3 180 - MTBE

24 - Toluene

10/13/95 4,090 31 5.2 6.3

110 - MEK

4.8 - THM

6.1 - Toluene

2.2 - Carbon disulfide

05/01/96 4,100 69 12 5.3

3.5 - Carbon disulfide

3.3 - THM

130 - MEK

10 - Toluene

5.6 - Chloroethane

12/06/94 5,420 46 4.5 6.9 12 - Toluene

390 - MEK

04/20/95 5,484 140 13 BDL 72 - Toluene

10/13/95 4,270 160 17 BDL 75 - Toluene

6.7 - Dimethyl sulfide

05/01/96 2,800 87 19 BDL

64 - Acetone

8.4 - Carbon disulfide

120 - Toluene

11/27/96 NS 20 BDL BDL 180 - Toluene

600 - MEK

MW-2D-1

MW-2D-2

MW-2S

S:\CONDATA\2000s\2049.01\Originals\2007 Annual Report\Tables.xls Page 1 of 8 Sanborn, Head & Associates, Inc.
TABLE 2

Summary of VOCs and Chloride Analytical Data - Monitoring Wells

Town Garage / Radio Beacon Site

Londonderry, New Hampshire

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

11/20/97 NS 12 9 BDL

82 - Toluene

220 - MEK

10 - 2-Hexanone

11/10/98 NS 9 8 BDL 67 - Toluene

60 - MEK

11/23/99 NS 5 4 BDL 14 - Toluene

10 - MEK

11/21/00 NS 6 4 BDL

10 - Acetone

30 - MEK

11 - Toluene

11/19/01 NS 6 4 BDL

20 - Acetone

20 - MEK

14 - Toluene

11/15/02 NS 4 3 BDL

20 - Acetone

10 - MEK

13 - Toluene

11/04/03 NS 4 3 BDL 10 - Acetone

9 - Toluene

11/04/04 NS 6 3 BDL 20 - Acetone

11 T l

MW-2D-2

(cont.)

11 - Toluene

11/28/05 NS 6 3 BDL 20 - Acetone

13 - Toluene

12/06/94 2,339 7 6.2 2.6 1.20 - Toluene

04/20/95 2,458 6.5 5.1 1.7 1.20 - Toluene

10/13/95 2,410 6.6 5.5 1.7 1.5 - MTBE

05/01/96 2,400 7.8 9.2 BDL 3.3 - MTBE

06/03/94 NS BDL BDL 7.6

12/06/94 7,390 11 8 6.4

04/20/95 7,979 12 8 5.5

10/12/95 8,810 14 9.9 5.7 2 - MTBE

05/01/96 8,700 22 20 9.9 2.8 - MTBE

06/03/94 36,000 33 17 34

12/06/94 18,980 19 15 23

04/20/95 17,940 34 20 27

10/12/95 17,400 37 25 20 2.4 - MTBE

05/01/96 18,800 50 44 30 2.1 - Chloroethane

06/03/94 10,900 100 37 300

12/06/94 12,410 100 48 360

04/20/95 11,530 120 58 280

10/12/95 9,000 120 62 320

05/01/96 11,300 150 86 360 6.9 - Chloroethane

11/27/96 NS 110 50 240

11/20/97 NS 100 64 160 1 - Toluene

11/10/98 NS 110 58 150 1 - Toluene

7 - Chloroethane

11/23/99 NS 86 40 85 8 - Chloroethane

11/21/00 NS 120 48 56 13 - Chloroethane

MW-2D-6

MW-2D-3

MW-2D-4

MW-2D-5

S:\CONDATA\2000s\2049.01\Originals\2007 Annual Report\Tables.xls Page 2 of 8 Sanborn, Head & Associates, Inc.
TABLE 2

Summary of VOCs and Chloride Analytical Data - Monitoring Wells

Town Garage / Radio Beacon Site

Londonderry, New Hampshire

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

11/19/01 NS 100 48 52 17 - Chloroethane

11/15/02 NS 57 28 28 7 - Chloroethane

11/04/03 NS 57 28 19 10 - Chloroethane

11/04/04 NS 46 18 11 7 - Chloroethane

11/29/05 NS 36 18 8 5 - Chloroethane

11/13/06 NS 33 18 7 5 - Chloroethane

12/11/06 NS 36 21 8 6 - Chloroethane

11/09/07 NS 21 14 3

Nov-90 42 BDL BDL BDL

05/17/94 39 BDL BDL BDL

11/03/94 74 6.8 BDL BDL

04/17/95 29 BDL BDL BDL

10/11/95 137 BDL BDL BDL

1.1 - Chloroethane

1.7 - THM

2.5 - MTBE

05/13/96 20 BDL BDL BDL

Nov-90 580 15 BDL BDL

05/17/94 4,537 11 5.8 BDL

12/01/94 4 260 11 6 2 BDL

MW-2D-6

(cont.)

MW-2R

Installed 10/30/06

MW-3S

12/01/94 4,260 11 6.2 BDL

04/17/95 4,425 9.4 5.1 BDL

10/11/95 212 11 5.2 BDL

05/13/96 4,400 12 8.3 BDL

11/26/96 NS 8 4 BDL

11/20/97 NS 8 6 BDL

11/09/98 NS 7 4 BDL

11/22/99 NS 5 3 BDL

11/17/00 NS 6 2 BDL

11/19/01 NS 6 2 BDL

11/14/02 NS 4 2 BDL

11/05/03 NS 4 1 BDL

11/03/04 NS 3 1 BDL

11/28/05 NS 3 1 BDL

Nov-90 2,880 BDL BDL BDL

05/11/94 1,124 4.2 BDL BDL 1.40 - Chloroethane

11/03/94 3,124 6.6 BDL BDL

04/25/95 2,010 3.6 BDL BDL 4.10 - MTBE

2.20 - Chloroethane

10/17/95 3,300 4.6 BDL BDL 1.2 - MTBE

04/24/96 1,210 2.8 BDL BDL 2.7 - Chloroethane

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

MW-4D-1 04/26/96 3,810 7.7 5.9 3.8

2 - Carbon disulfide

6.2 - THM

43 - MEK

2.1 - Methylene chloride

2.9 - Toluene

MW-4S

MW-3D

S:\CONDATA\2000s\2049.01\Originals\2007 Annual Report\Tables.xls Page 3 of 8 Sanborn, Head & Associates, Inc.
TABLE 2

Summary of VOCs and Chloride Analytical Data - Monitoring Wells

Town Garage / Radio Beacon Site

Londonderry, New Hampshire

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

04/26/95 24,850 5.1 7.5 4.2 3.50 - THM

9.80 - Toluene

04/26/96 22,300 8 11 4.5

2.5 - Carbon disulfide

3.2 - THM

3 - Methylene Chloride

4.5 - Toluene

11/25/96 NS 7 7 3 3 - THM

4 - Toluene

11/20/97 NS 10 10 2 2 - THM

3 - Toluene

11/10/98 NS 9 5 BDL 2 - Toluene

11/23/99 NS 9 5 BDL 4 - Toluene

20 - MEK

11/21/00 NS 13 6 BDL

20 - Acetone

50 - MEK

4 - Toluene

11/20/01 NS 13 8 3

20 - Acetone

2 -THM

40 - MEK

4 l

MW-4D-2

4 - Toluene

11/15/02 NS 6 2 BDL 20 - MEK

3 - Toluene

11/04/03 NS 9 6 3

20 - Acetone

2 -THM

30 - MEK

4 - Toluene

11/04/04 NS 9 5 BDL 20 - MEK

4 - Toluene

11/29/05 NS 9 6 2

10 - Acetone

20 - MEK

4 - Toluene

06/02/94 22,000 7.6 6.5 41 3.50 - MTBE

12/06/94 19,720 9.2 6.9 43 2.90 - MTBE

04/26/95 12,000 9.5 7.5 31

10/17/95 12,900 8.9 3.6 21 2.2 - MTBE

04/26/96 13,700 11 5.6 24 2.4 - MTBE

2.7 - Chloroethane

11/25/96 NS 9 2 15

11/20/97 NS 10 2 10

11/10/98 NS 7 1 6

11/23/99 NS 4 BDL 3

11/21/00 NS 3 BDL BDL

11/20/01 NS 3 BDL BDL

11/15/02 NS BDL BDL BDL

11/04/03 NS BDL BDL BDL

11/04/04 NS BDL BDL BDL

11/29/05 NS BDL BDL BDL

MW-4D-3

S:\CONDATA\2000s\2049.01\Originals\2007 Annual Report\Tables.xls Page 4 of 8 Sanborn, Head & Associates, Inc.
TABLE 2

Summary of VOCs and Chloride Analytical Data - Monitoring Wells

Town Garage / Radio Beacon Site

Londonderry, New Hampshire

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

05/18/94 3,640 2.2 13 89

11/03/94 2,040 BDL 14 100

04/25/95 4,072 BDL 9.4 43

10/17/95 3,000 2.1 13 64 1.4 - PCE

04/24/96 5,120 2.2 15 81

11/25/96 NS BDL 9 55

11/20/97 NS BDL 12 52

11/10/98 NS BDL 5 27

11/23/99 NS BDL 4 21

12/06/00 NS BDL 5 19 7 - MTBE

11/20/01 NS BDL 3 11 10 - MTBE

11/15/02 NS BDL 4 11 5 - MTBE

11/04/03 NS BDL 3 9

11/04/04 NS BDL 2 5

11/29/05 NS BDL 1 4

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

MW-5D-1 04/25/96 NS 5 2.4 4.8

96 - Acetone

2.4 - Carbon disulfide

MW-5S

20 - Toluene

MW-5D-2 04/25/96 1,290 BDL BDL 7.1

5.2 - Carbon disulfide

5.1 - THM

4.1 - Toluene 

06/03/94 1,900 3.1 5.4 15

04/25/96 1,790 BDL 2.6 6.3

06/03/94 6,900 NS NS NS

12/06/94 6,110 BDL BDL 4.5

04/25/95 5,780 BDL BDL BDL

10/11/95 5,760 1 TRACE 2.2 1.6 - MTBE

04/25/96 6,030 BDL BDL 3.7 3.5 - MTBE

11/25/96 NS BDL BDL 2

11/20/97 NS BDL BDL BDL

11/10/98 NS BDL BDL BDL

11/23/99 NS BDL BDL BDL

11/21/00 NS BDL BDL BDL 10 - MTBE

Nov-90 100 BDL BDL BDL

05/17/94 191 BDL BDL BDL

05/25/94 174 NS NS NS

11/03/94 301 BDL BDL BDL

04/17/95 118 BDL BDL BDL

MW-6D* 11/01/90 NS 13 6 BDL

06/02/94 NS 6.6 2.5 BDL

3.80 - THM

7.50 - Toluene

340 - MEK

150 - Acetone

05/09/96 8,480 16 2.2 BDL

7.8 - Carbon disulfide

40 - MEK

25 - Toluene

MW-5D-3

MW-6S

MW-6D-1

MW-5D-4

S:\CONDATA\2000s\2049.01\Originals\2007 Annual Report\Tables.xls Page 5 of 8 Sanborn, Head & Associates, Inc.
TABLE 2

Summary of VOCs and Chloride Analytical Data - Monitoring Wells

Town Garage / Radio Beacon Site

Londonderry, New Hampshire

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

06/02/94 8,800 11 7 BDL 1.50 - Toluene

12/01/94 9,050 13 7.1 BDL

04/20/95 8,714 10 6.3 BDL 1.10 - MTBE

1.80 - Toluene

10/10/95 9,300 12 6.1 BDL 2.3 - MTBE

05/09/96 7,350 11 6.8 BDL 2.6 - Toluene

11/26/96 NS 10 5 BDL

11/20/97 NS 12 8 BDL 1 - Toluene

11/09/98 NS 10 6 BDL 2 - Toluene

11/22/99 NS 9 4 BDL 1 - Toluene

11/17/00 NS 11 4 BDL

11/19/01 NS 11 5 BDL 1 - Toluene

11/14/02 NS 13 5 BDL 1 - Toluene

11/05/03 NS 9 3 BDL 2 - Toluene

11/03/04 NS 8 2 BDL 1 - Toluene

11/28/05 NS 6 1 BDL 1 - Toluene

06/02/94 2,200 3.2 1.5 BDL

12/01/94 1,860 3.6 1.7 BDL 1.50 - Toluene

MW-6D-3 04/20/95 2,379 3 1.4 BDL 1.50 - Toluene

MW-6D-2

10/10/95 7,850 14 6.3 BDL 2.40 - MTBE

05/09/96 1,570 2.6 BDL BDL

06/02/94 3,800 5.2 BDL BDL 2.60 - 1,2 DCA

12/01/94 4,590 8.5 3.4 BDL

04/20/95 3,621 5 2.1 BDL

10/10/95 7,410 18 6.6 4.5 1.40 - MTBE

05/09/96 2,210 3.5 2.1 BDL

11/26/96 NS 6 3 BDL 1 - Toluene

11/20/97 NS 18 9 BDL

11/09/98 NS 16 7 BDL 1 - Toluene

11/22/99 NS 9 4 BDL

11/17/00 NS 12 4 BDL

11/19/01 NS 17 6 BDL

11/14/02 NS 16 5 BDL 1 - Toluene

11/05/03 NS 7 2 BDL

11/03/04 NS 6 2 BDL

11/28/05 NS 2 BDL BDL 1 - Toluene

Nov-90 46 BDL BDL BDL

05/17/94 95 BDL BDL BDL

11/03/94 107 BDL BDL BDL

04/17/95 70 BDL BDL BDL

11/01/90 35 BDL BDL BDL

05/17/94 105 BDL BDL BDL

12/06/94 103 BDL BDL BDL

04/17/95 99 BDL BDL BDL

MW-7D

MW-7S

MW-6D-4

S:\CONDATA\2000s\2049.01\Originals\2007 Annual Report\Tables.xls Page 6 of 8 Sanborn, Head & Associates, Inc.
TABLE 2

Summary of VOCs and Chloride Analytical Data - Monitoring Wells

Town Garage / Radio Beacon Site

Londonderry, New Hampshire

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

05/10/94 597 BDL BDL BDL

11/03/94 2,105 2.1 BDL 4.6

04/18/95 895 BDL BDL BDL

10/16/95 2,700 BDL BDL 5.8

05/03/96 865 BDL BDL BDL

Nov-90 9,130 48 28 BDL

05/10/94 1,004 BDL BDL 2

11/03/94 2,439 2.7 1.3 2.7

04/18/95 1,122 BDL BDL 1.2

10/16/95 8,700 11 6 2.9 1.8 - MTBE

05/03/96 2,140 2.5 BDL 3

11/27/96 NS 7 4 BDL

11/20/97 NS 7 5 BDL

11/09/98 NS 5 3 BDL

11/22/99 NS 3 2 BDL

16 - Chloromethane

21 - Vinyl Chloride

20 - Acetone

MW-8S

MW-8D

11/17/00 NS 3 1 BDL 15 - Carbon Disulfide

46 - Benzene

9 - Toluene

4 - Styrene

11/19/01 NS 4 1 BDL

11/14/02 NS 2 1 BDL

11/04/03 NS 3 1 BDL

11/03/04 NS 2 BDL BDL

11/28/05 NS BDL BDL BDL

Nov-90 530 BDL BDL BDL

05/11/94 499 BDL BDL 1.6

11/03/94 869 BDL BDL 12

04/18/95 642 BDL BDL 1.2

10/13/95 860 BDL BDL 11

05/02/96 490 BDL BDL BDL

06/02/96 191 BDL BDL BDL

12/08/94 347 BDL BDL BDL 1.4 - Toluene

04/26/95 228 BDL BDL BDL

10/17/95 200 BDL BDL BDL

05/07/96 130 BDL BDL BDL

05/18/94 148 1.5 BDL BDL 1.1 - Chloromethane

12/09/94 118 2.3 BDL BDL

04/26/95 162 1.4 BDL BDL

10/17/95 200 1.8 BDL BDL

05/07/96 156 BDL BDL BDL

RWGD

MW-9S

RWGS

S:\CONDATA\2000s\2049.01\Originals\2007 Annual Report\Tables.xls Page 7 of 8 Sanborn, Head & Associates, Inc.
TABLE 2

Summary of VOCs and Chloride Analytical Data - Monitoring Wells

Town Garage / Radio Beacon Site

Londonderry, New Hampshire

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 during 2007.

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\2049.01\Originals\2007 Annual Report\Tables.xls Page 8 of 8 Sanborn, Head & Associates, Inc.
FIGURES
LEGE~~ D 

-··-

----= 6-2-1 

• MW-200 

$MW-5S 

APPROXIMATE GROU~JDWATER MMAGEME~H zmjE (GMZ) BOU~WARY 

RESIDE~HIAL WELL REMOVED FROM THE GROU~JDWATER Mmj iTORI~jG PROGRAM AS DESCRIBED lfJ THE 

JWJE 2006 REVISED AME~JDMEm ~JO. 2 TO THE STATEMEm OF WORK (SOW) MmJITORirJG WELL REMOVED FROM THE GROUrmWATER MmJITORirJG PROGRAM Nm DECOMMISSIDrJED 

DURirJG THE FALL2007 AS DESCRIBED lrJ THE JUrJE 2006 REVISED AMErmMEmrw. 2 TD THE SOW 

MmJ ITORirJG WELL REMOVED FROM THE GROUrmWATER MmJITORirJG PROGRAM Nm rWT DECOMMISSIDrJED $ AfW"-6D-2.4 AS DESCRIBED lrJ THE JIJrJE 2006 REVISED AMErmMEm rw. 2 TO THE SOW 

® MW-2R 

6-6 ~_\/ 

- _1)..;,-

6-11 \ \-;o ; 

6-12 

;:~"o'>~ .... ,\. ~ l 

' L ~ \~ 1111 ~ 

\ i-~~ ~n \ ::;\, ~~~tl ~o,CO -- . . --- . ::::::::::::::: . ' ~~ \ 

II 

::~ (/) 

s 

1

·••11 

B 

a~ ~ ~ 01 o_ 

m 

I II ! 

~ 

E--4 

00 

z 

0 

u z !;;l-< j 0~ 

~a::l ll.. 

~~ z 

0 

E=: rn-< < :;i!P:: u 

~~ 0 

...:I 

,.C!l ...:I g-< ...:I 

"'P:: ~ 

-< jS:: 

C!l 

z 

I== 

0 

I~ 2049.01 

FIGURE ~jU M BER; 

1 

_j 
100

1000

μg/l)

Figure 2

Concentration vs. Time Plot

MW-2D-6/MW-2R

Town Garage/Radio Beacon Site

Londonderry, New Hampshire

S:\CONDATA\2000s\2049.01\Originals\2007 Annual Report\MonWellPlot.xls 

0.1

1

10

Jan-94 Jan-95 Jan-96 Dec-96 Jan-98 Jan-99 Jan-00 Dec-00 Jan-02 Jan-03 Jan-04 Dec-04 

Concentration (μ

Sample Dates

1,1,1-TCA 1,1-DCA 1,1-DCE1,1,1-TCA Cleanup Goal (200) 1,1-DCA Cleanup Goal (81) 1,1-DCE Cleanup Goal (7)

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.
ATTACHMENT A 

WELL DECOMMISSIONING 

DOCUMENTATION
Well Decommissioning Documentation 

Pursuant to Revised Amendment No. 2 to the Statement of Work (SOW), dated June 2, 2006 and 

approved by the United States Environmental Protection Agency (USEPA) on June 12, 2006 

Sanborn, Head & Associates, Inc. (SHA) has observed and documented the decommissioning of 

two shallow overburden monitoring wells (MW-2S and MW-5S) and four bedrock monitoring 

wells (MW-2D, MW-3D, MW-4D, MW-8D), installed at the Town Garage/Radio Beacon Site 

(the Site) in Londonderry, New Hampshire. Locations of these wells are depicted on Figure 1. 

The monitoring wells were decommissioned between October 9 and 12, 2007 by Geosearch, Inc. 

(Geosearch) of Fitchburg, Massachusetts. Decommissioning activities were observed by SHA. 

Logs of the six decommissioned wells are included in this Appendix.

S:\CONDATA\2000s\2049.01\Originals\2007 Annual Report\Well Decommissioning Documentation.doc 
Description

Drilling Company: Geosearch, Inc.

Foreman: J. Keenan

Groundwater Readings

Ref. Pt.

20.1'

Time Stab. Time

10/11/07

Depth to Water

Stratum

(after packing tube pulled)

Date Finished: 10/11/07

Checked By: S. Nerney

Depth

(ft)

0

2

4

6

8

10

12

14

16

18

20

22

24

26

28

30

32

34

36

38

40

42

44

46

48

50

52

54

56

58

60

62

64

66

68

70

72

74

76

78

80

82

84

86

88

90

92

94

96

98

100

-----0'-----

09:30

No soil samples obtained. Topsoil (0 to 1.2')

Concrete Cap (1.2 to 2')

6" Steel Casing (1.5 to

29')

Bedrock Borehole (29 to

185')

Cement/Bentonite Grout

(2 to 185')

Top of PVC

Drilling Method: CME 75 Truck Rig

Date Depth of Casing

Spoon

Blows

per 6 in

Date Started: 10/11/07

Logged By: D. Porter

Pen/

Rec

(in)

Log

PID/FID

Values

(ppmv)

09:30

Well Description Well

Diagram

10/11/07 20.1' Top of PVC(after packing tube pulled)

DECOM OF MON WELL 2049.01_FORMER LONDONDERRY TOWN GARAGE_OCT07_LOGS.GPJ S:\CONDATA\GINT\OLD GINT LIBRARIES\040706 SHA - NEW LOGO.GLB 12/28/07

Sampling Method: N/A

Sheet: 1 of 2

Ground Elevation: N/A

Datum: N/A

Project: Londonderry Town Garage

Location: Londonderry, New Hampshire

SHA Project No.: 2049.01

Geologic Description

Decommissioning Log of Monitoring Well MW-2D

Depth

(ft)

Sample

No.

Sample Information
Groundwater Readings

Ref. Pt.

20.1'

Time Stab. Time

10/11/07 09:30

Date Started: 10/11/07

Logged By: D. Porter

Description

Depth to Water

Date Finished: 10/11/07

Checked By: S. Nerney

Depth

(ft)

100

102

104

106

108

110

112

114

116

118

120

122

124

126

128

130

132

134

136

138

140

142

144

146

148

150

152

154

156

158

160

162

164

166

168

170

172

174

176

178

180

182

184

186

188

190

192

194

196

198

200

-----185'-----

Stratum

10/11/07 09:30 20.1' Top of PVC

Date Depth of Casing

Drilling Company: Geosearch, Inc. (after packing tube pulled)

Foreman: J. Keenan

Spoon

Blows

per 6 in

Pen/

Rec

(in)

Drilling Method: CME 75 Truck Rig

PID/FID

Values

(ppmv)

Sample Information

Well Description Well

Log Diagram

Sampling Method: N/A

Sheet: 2 of 2

Ground Elevation: N/A

Datum: N/A

Project: Londonderry Town Garage

Location: Londonderry, New Hampshire

SHA Project No.: 2049.01

Depth Geologic Description

(ft)

Decommissioning Log of Monitoring Well MW-2D

DECOM OF MON WELL 2049.01_FORMER LONDONDERRY TOWN GARAGE_OCT07_LOGS.GPJ S:\CONDATA\GINT\OLD GINT LIBRARIES\040706 SHA - NEW LOGO.GLB 12/28/07

Sample

No.
S:\Condata\2000s\2049.01\Logs\Decommissioning Log of Monitoring Well MWͲ2D

Decommissioning Log of Monitoring Well MWͲ2D

NOTES:

1. Original well drilled and installed in October 1990 by LaFramboise for Metcalf & Eddy. A 

Solinst, Ltd. of Canada, Waterloo multilevel dedicated sampling system was installed in June 

1991 by Metcalf & Eddy. 

2. The sample tubes and cables that connect the sampling pumps and pressure transducers with 

the ground surface were pulled. The sample tubes and 4 of the 6 electrical cables were pulled 

from the well. The cables stretched and broke. Based on previous discussions with Solinst, the 

system was reportedly designed such that the individual sample tubes and cables will break 

away from the individual sampling ports if the corresponding tubes and cables were pulled. 

3. Because of the remaining cables inside the central 3-inch diameter PVC conduit, the bottom 

depth of the central conduit was plunked to a depth of about 175 feet.

4. Since there were still cables within the central PVC conduit the tremie line could only be 

inserted down inside the conduit to a depth of about 175 feet. The conduit was filled, using the 

tremie line, with a cement/bentonite grout mixture. Grout was also placed using a tremie line 

above the top packer. 

5. The approximately 6-inch diameter steel casing was cut approximately 1.5 feet below the 

ground surface. Concrete was added from approximately 1.2 to 2 feet below the ground 

surface. 

6. Several inches of topsoil were spread over the grouted borehole flush with the ground 

surface.
Drilling Company: Geosearch, Inc.

Foreman: J. Keenan

Groundwater Readings

Ref. Pt.

6.2'

Time Stab. Time

10/11/07 14:00 Top of PVC

Description

Depth to Water

Date Finished: 10/11/07

Checked By: S. Nerney

Depth

(ft)

0

2

4

6

8

10

12

14

16

18

20

22

24

26

28

30

32

34

36

38

40

42

44

46

48

50

-----10'-----

Stratum

-----0'----- No soil samples obtained.

NOTES:

1. Original well drilled and installed in October

1990 by LaFramboise for Metcalf & Eddy.

2. Well depth plunked at 10 feet from ground

surface.

3. Using a tremie line, a cement/bentonite

grout mixture was pumped into the well. The

bottom of the 2-inch PVC well pipe was then

punctured and the pipe was removed. Grout

was placed to about 3 inches below the

ground surface and several inches of topsoil

were spread over the grouted borehole.

Topsoil (0 to 0.3')

Cement/Bentonite Grout

(0.3 to 10')

Drilling Method: CME 75 Truck Rig

Date Depth of Casing

Well installed -

Depth

(ft)

Date Started: 10/11/07

Logged By: D. Porter

Spoon

Blows

per 6 in

Pen/

Rec

(in)

Log

Sampling Method: N/A

PID/FID

Values

(ppmv)

Well Description Well

Diagram

DECOM OF MON WELL 2049.01_FORMER LONDONDERRY TOWN GARAGE_OCT07_LOGS.GPJ S:\CONDATA\GINT\OLD GINT LIBRARIES\040706 SHA - NEW LOGO.GLB 12/28/07

Sheet: 1 of 1

Ground Elevation: N/A

Datum: N/A

Project: Londonderry Town Garage

Location: Londonderry, New Hampshire

SHA Project No.: 2049.01

Geologic Description

Decommissioning Log of Monitoring Well MW-2S

Sample Information

Sample

No.
Date Finished: 10/11/07

Checked By: S. Nerney

Ground Elevation: N/A

Datum: N/A

Groundwater Readings

Ref. Pt.

8.25'

Time Stab. Time

10/10/07

Stratum

Description

Top of Casing

Depth to Water

Depth

(ft)

0

2

4

6

8

10

12

14

16

18

20

22

24

26

28

30

32

34

36

38

40

42

44

46

48

50

52

54

56

58

60

62

64

66

68

70

72

74

76

78

80

82

84

86

88

90

92

94

96

98

100

Date Started: 10/10/07

Logged By: M. Thomas

Drilling Company: Geosearch, Inc.

Foreman: J. Keenan

Drilling Method: CME 850 Tracked ATV

Sampling Method: N/A

-----0'----- No soil samples obtained. Topsoil (0 to 0.5')

Concrete Cap (0.5 to

1.5')

6" Steel Casing (1 to 16')

Bedrock Borehole (16 to

184')

Cement/Bentonite Grout

(1.5 to 184')

Project: Londonderry Town Garage

Location: Londonderry, New Hampshire

SHA Project No.: 2049.01

Date Depth of Casing

Well Installed -

Well Description Pen/

Rec

(in)

Sheet: 1 of 2

Log

PID/FID

Values

(ppmv)

10/10/07

Well

Diagram

8.25' Top of Casing Well Installed -

Geologic Description

Decommissioning Log of Monitoring Well MW-3D

DECOM OF MON WELL 2049.01_FORMER LONDONDERRY TOWN GARAGE_OCT07_LOGS.GPJ S:\CONDATA\GINT\OLD GINT LIBRARIES\040706 SHA - NEW LOGO.GLB 12/28/07

Spoon

Blows

per 6 in

Sample

No.

Sample Information

Depth

(ft)
8.25'

Time Stab. Time

10/10/07

Stratum

Description

Ground Elevation: N/A

Datum: N/A

Depth

(ft)

100

102

104

106

108

110

112

114

116

118

120

122

124

126

128

130

132

134

136

138

140

142

144

146

148

150

152

154

156

158

160

162

164

166

168

170

172

174

176

178

180

182

184

186

188

190

192

194

196

198

200

Date Started: 10/10/07

Logged By: M. Thomas

Drilling Company: Geosearch, Inc.

Foreman: J. Keenan

Drilling Method: CME 850 Tracked ATV

Sampling Method: N/A

-----184'-----

Date Finished: 10/11/07

Checked By: S. Nerney

10/10/07 Well Installed -

Ref. Pt.

8.25'

Groundwater Readings

Date Depth of Casing

Well Installed -

Depth to Water

Top of Casing

Project: Londonderry Town Garage

Location: Londonderry, New Hampshire

SHA Project No.: 2049.01

Spoon

Blows

per 6 in

Sheet: 2 of 2

Pen/

Rec

(in)

Depth

(ft)

PID/FID

Values

(ppmv)

Well Description Well

Log Diagram Geologic Description

Decommissioning Log of Monitoring Well MW-3D

DECOM OF MON WELL 2049.01_FORMER LONDONDERRY TOWN GARAGE_OCT07_LOGS.GPJ S:\CONDATA\GINT\OLD GINT LIBRARIES\040706 SHA - NEW LOGO.GLB 12/28/07

Sample

No.

Sample Information
S:\Condata\2000s\2049.01\Logs\Decommissioning Log of Monitoring Well MWͲ3D

Decommissioning Log of Monitoring Well MWͲ3D

NOTES:

1. Original well drilled and installed in October 1990 by LaFramboise for Metcalf & Eddy. 

2. Well depth plunked at 184 feet from ground surface. 

3. Well filled with a cement/bentonite grout mixture using a tremie line. The approximately 

6-inch diameter steel casing was cut off approximately 1 foot below the ground surface. 

Concrete was added from approximately 0.5 to 1.5 feet. 

4. Several inches of topsoil were spread over the grouted borehole at the ground surface.

.
0

2

4

6

8

10

12

14

16

18

20

22

24

26

28

30

32

34

36

38

40

42

44

46

48

50

52

54

56

58

60

62

64

66

68

70

72

74

76

78

80

82

84

86

88

90

92

94

96

98

100

Time Ref. Pt. Stab. Time

10/10/07

Stratum

Description

Date Finished: 10/10/07

Checked By: S. Nerney

Geologic Description

Not Measured

Date Started: 10/09/07

Logged By: M. Thomas

Drilling Company: Geosearch, Inc.

Foreman: J. Keenan

Drilling Method: CME 850 Tracked ATV

Sampling Method: N/A

Sheet: 1 of 2

Ground Elevation: N/A

Datum: N/A

-----0'-----

Depth

(ft)

No soil samples obtained. Topsoil (0 to 0.5')

Formation Material (0.5

to 1.5')

Concrete Cap (1.5 to 3')

6" Steel casing (2 to 28')

Bedrock Borehole (28 to

185')

Cement/Bentonite Grout

(3 to 185')

Groundwater Readings

Date Depth to Water Depth of Casing

Project: Londonderry Town Garage

Location: Londonderry, New Hampshire

SHA Project No.: 2049.01

10/10/07

PID/FID

Values

(ppmv)

Spoon

Blows

per 6 in

Well Description Well

Diagram

Not Measured

Log

Decommissioning Log of Monitoring Well MW-4D

DECOM OF MON WELL 2049.01_FORMER LONDONDERRY TOWN GARAGE_OCT07_LOGS.GPJ S:\CONDATA\GINT\OLD GINT LIBRARIES\040706 SHA - NEW LOGO.GLB 12/28/07

Pen/

Rec

(in)

Sample

No.

Sample Information

Depth

(ft)
Drilling Company: Geosearch, Inc.

Foreman: J. Keenan

Date Finished: 10/10/07

Checked By: S. Nerney

Depth

(ft)

100

102

104

106

108

110

112

114

116

118

120

122

124

126

128

130

132

134

136

138

140

142

144

146

148

150

152

154

156

158

160

162

164

166

168

170

172

174

176

178

180

182

184

186

188

190

192

194

196

198

200

Decommissioning Log of Monitoring Well MW-4D

Date Started: 10/09/07

Logged By: M. Thomas

10/10/07

Drilling Method: CME 850 Tracked ATV

Sampling Method: N/A

Sheet: 2 of 2

Ground Elevation: N/A

Datum: N/A

Project: Londonderry Town Garage

Location: Londonderry, New Hampshire

SHA Project No.: 2049.01

Geologic Description

-----185'-----

Depth of Casing

10/10/07 Not Measured

Description

Date

Stratum

Depth to Water

Not Measured

Groundwater Readings

Time Ref. Pt. Stab. Time

Pen/

Rec

(in)

PID/FID

Values

(ppmv)

Well Description Well

Log Diagram

DECOM OF MON WELL 2049.01_FORMER LONDONDERRY TOWN GARAGE_OCT07_LOGS.GPJ S:\CONDATA\GINT\OLD GINT LIBRARIES\040706 SHA - NEW LOGO.GLB 12/28/07

Spoon

Blows

per 6 in

Sample

No.

Sample Information

Depth

(ft)
S:\Condata\2000s\2049.01\Logs\Decommissioning Log of Monitoring Well MWͲ4D

Decommissioning Log of Monitoring Well MWͲ4D

NOTES: 

1. Original well drilled and installed in October 1990 by LaFramboise for Metcalf & Eddy. A 

Solinst, Ltd. of Canada, Waterloo multilevel dedicated sampling system was installed in June 

1991 by Metcalf & Eddy. 

2. The sample tubes and cables that connect the sampling pumps and pressure transducers with 

the ground surface were pulled. Three sample tubes and one of three electric cables were 

pulled from the well. Two cables stretched and broke. Based on previous discussions with 

Solinst, the system was reportedly designed such that the individual sample tubes and cables 

will break away from the individual sampling ports if the corresponding tubes and cables were 

pulled.

3. Well depth above the top packer plunked at about 7 feet from ground surface. Because of the 

remaining cables inside the central 3-inch diameter PVC conduit, the bottom depth of the 

central conduit was plunked to a depth of about 157 feet. 

4. Since there were still cables within the central PVC conduit the tremie line could only be 

inserted inside the conduit to a depth of about 165 feet. The conduit was filled, using the tremie 

line, with a cement/bentonite grout mixture. Grout was also placed using a tremie line above 

the top packer. 

5. After placing the grout, the top section (approximately 7 feet long) of the central PVC 

conduit was removed by unthreading the section. 

6. The approximate 6-inch diameter steel casing was cut approximately 2 feet below the 

ground surface. Concrete was added from approximately 1.5 to 3 feet below the ground 

surface because of the grout settlement overnight. 

7. Approximately 1.5 feet of topsoil were spread over the grouted borehole at the ground

surface. 
0

2

4

6

8

10

12

14

16

18

20

22

24

26

28

30

32

34

36

38

40

42

44

46

48

50

Time Stab. Time

10/09/07

Stratum

Description

Date Finished: 10/10/07

Checked By: S. Nerney

Ref. Pt.

Groundwater Readings

Date Started: 10/09/07

Logged By: M. Thomas

Drilling Company: Geosearch, Inc.

Foreman: J. Keenan

Drilling Method: CME 850 Tracked ATV

Sampling Method: N/A

Sheet: 1 of 1

Ground Elevation: N/A

Datum: N/A

Project: Londonderry Town Garage

Location: Londonderry, New Hampshire

SHA Project No.: 2049.01

-----30.3'-----

Depth

(ft)

-----0'----- No soil samples obtained.

NOTES:

1. Original well drilled and installed in October

1990 by LaFramboise for Metcalf & Eddy.

2. Well depth plunked at 30.3 feet from ground

surface.

3. Using a tremie line, a cement/bentonite

grout mixture was pumped into the well. The

bottom of the 2-inch PVC well pipe was then

punctured and the well pipe was removed.

Grout was placed to about 6-inches below the

ground surface and several inches of topsoil

were spread over the ground borehole.

Topsoil (0 to 0.5')

Cement/Bentonite Grout

(0.5 to 30.3')

15.05'

Date Depth of Casing

Well Installed

Depth to Water

Top of Casing

PID/FID

Values

(ppmv)

Geologic Description Pen/

Rec

(in)

Log

Spoon

Blows

per 6 in

Well Description Well

Diagram

Decommissioning Log of Monitoring Well MW-5S

DECOM OF MON WELL 2049.01_FORMER LONDONDERRY TOWN GARAGE_OCT07_LOGS.GPJ S:\CONDATA\GINT\OLD GINT LIBRARIES\040706 SHA - NEW LOGO.GLB 12/28/07

Sample

No.

Sample Information

Depth

(ft)
Ground Elevation: N/A

Datum: N/A

Top of Casing

Groundwater Readings

Ref. Pt.

21.2'

Time Stab. Time

10/12/07 -

Stratum

63' NA

Date Finished: 10/12/07

Checked By: S. Nerney

Depth

(ft)

0

2

4

6

8

10

12

14

16

18

20

22

24

26

28

30

32

34

36

38

40

42

44

46

48

50

52

54

56

58

60

62

64

66

68

70

72

74

76

78

80

82

84

86

88

90

92

94

96

98

100

Date Started: 10/12/07

Logged By: M. Thomas

Drilling Company: Geosearch, Inc.

Foreman: J. Keenan

Drilling Method: CME 75 Truck Rig

Sampling Method: N/A

-----65.5'-----

Description

-----0'----- No soil samples obtained.

NOTES:

1. No original log of MW-8D was available;

however, it is believed the well was installed at

a similar time period (October 1990) and by

LaFramboise for Metcalf & Eddy as the other

site wells.

2. Well depth plunked at 65.5 feet from ground

surface.

3. Well filled with a cement/bentonite grout

mixture using a tremie line. The approximately

6-inch diameter steel casing was cut off

approximately 1.5 feet below the ground

surface. Concrete was added from

approximately 1 to 3 feet because of grout

settlement.

4. Soil was placed from about 0.3 to 1 foot

below the ground surface. Rubber landscape

chips were placed from the ground surface to

0.3 feet below the ground surface.

Rubber Landscaping

Chips (0 to 0.3')

Formation Material (0.3

to 1')

Concrete Cap (1 to 3')

6" Steel Casing (1.5 to

22.5')

Bedrock Borehole (22.5

to 65.5')

Depth to Water

Project: Londonderry Town Garage

Location: Londonderry, New Hampshire

SHA Project No.: 2049.01

Date Depth of Casing

Cement/Bentonite Grout

(3 to 65.5')

Sheet: 1 of 1

Spoon

Blows

per 6 in

Pen/

Rec

(in)

Geologic Description Log

PID/FID

Values

(ppmv)

Well Description Well

Diagram

Decommissioning Log of Monitoring Well MW-8D

DECOM OF MON WELL 2049.01_FORMER LONDONDERRY TOWN GARAGE_OCT07_LOGS.GPJ S:\CONDATA\GINT\OLD GINT LIBRARIES\040706 SHA - NEW LOGO.GLB 12/28/07

Depth

(ft)

Sample

No.

Sample Information
ATTACHMENT B 

GROUNDWATER QUALITY FIELD 

SAMPLING SUMMARY FORM 
Groundwater Quality Field Sampling Summary

d d i)

Comments

 Project Number: 2049.01 Date: November 9, 2007

 Project Name: Former Londonderry Town Garage

 Project Location: Londonderry, New Hampshire

 pH Meter: YSI 556 Project Manager: S. Nerney

 Conductivity Meter: YSI 556 Collector: M. Thomas

 Water Level Meter: Solinst Weather: P. Cloudy, 40s

 Dissolved Oxygen: YSI 556

Field Measurements

 Sampling Location MW-2R

 Reference Point PVC

 Reference Point Elevation (feet) 355.69

 Depth to Floating Product (feet) -

 Depth to Water (feet) 3.62

 Water Table Elevation (feet) 352.07

 Depth to Bottom (feet) 48.5

 pH( d d i ) H (stan ar un ts 6 8.

 Specific Conductance (μS/cm) 12,500

 Temperature (oC) 12.9

 Dissolved Oxygen (mg/L) 0.3

 Date of Sample 9-Nov

 Sample Time 1155

 Comment Reference Number 1

1. Sample collected using low flow sampling techniques.

S:\CONDATA\2000s\2049.01\Originals\2007 Annual Report\20071109 GwQFSS.xls Page 1 of 1 Sanborn, Head & Associates, Inc.
ATTACHMENT C 

ANALYTICAL LABORATORY 

DATA REPORT 
----+~+-----------------------------e __ a_s_t_e __ r_n __ a __ n_a __ l_yt __ i_c_a __ l ___ ,·,, ... . '! \ • ' t ' ! . . 

Scott Nerney 

Sanborn, Head & Associates, Inc. (NH) 

20 Foundry Street 

Concord , NH 03301 

Subject: Laboratory Report 

Eastern Analytical, Inc. 10: 

Client Identification: 

Date Received: 

Dear Mr. Nerney : 

65924 

Londonderry Town Garage 12049.01 

11/9/2007 

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

accordance with our QNQC 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. (EAI) 

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 throughout all EAI reports: 

Solid samples are reported on a dry weight basis, unless otherwise noted 

<: "less than" followed by the detection limit 

TNR: Testing Not Requested 

NO: None Detected, no established detection limit 

RL: Reporting Limits 

%R: % Recovery 

Eastern Analytical Inc. maintains certification in the following states: Connecticut (PH-0492), Maine (NH005), 

Massachusetts (M-NH005), New Hampshire/NElAP (1012), Rhode Island (269) and Vermont (VT1012). 

This report package contains the following information: Sample Conditions summary, Analytical Results/Data and 

copies of the Chain of Custody. This report may not be reproduced except in full, without the the written approval 

of the laboratory. 

Analytical Deviation & QA/QC Documentation: 

Quality Control Samples associated with this project are included in this report. At a minimum, a Method Blank 

and Laboratory Control Sample (LCS) are reported. Matrix Spikes and Duplicates are reported where applicable. 

Deviations are narrated on the QC pages. 

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, 

Lorraine 

~~nC Olashaw, Lab Director 

(( ·llj ·U':tDate 

·I i. \.I i ' . : . : \\"\\W.l'aibhs.o1m 

#of pages (excluding cover letter) 

·. 
SAMPLE CONDITIONS PAGE 

Eastern Analytical, Inc. 10#: 65924 

Client: Sanborn, Head & Associates, Inc. (NH) Client Designation: Londonderry Town Garage 12049.01 

Temperature upon receipt (

0

C}: 4.4 Received on ice or cold packs (Yes/No): Y 

Date Date Sample % Dry 

lab iD Sample ID Received Sampled Matrix Weight Exceptions/Comments (other than thermal preservation) 

65924.01 MW-2R 

65924.02 Trip Blank 

11/9/07 11/9/07 aqueous 

11/9/07 10/29/07 aqueous 

Adheres to Sample Acceptance Policy 

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 600/4-79-020, 1983 

2) Standard Methods for Examination of Water and Wastewater: Jnorganics, 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 
LAB ORA TORY REPORT 

Eastern Analytical, Inc. 10#: 65924 

Client: Sanborn, Head & Associates, Inc. Client Designation: Londonderry Town Garage 12049.01 

(NH) 

Sample 10: MW-2R Trip Blank 

Lab Sample 10: 65924.01 65924.02 

Matrix: aqueous aqueous 

Date Sampled: 11/9/07 10/29/07 

Date Received: 11/9/07 11/9/07 

Units: ug/1 ug/1 

Date of Analysis: 11/10/07 11/10/07 

Analyst: BAM BAM 

Method: 8260B 8260B 

Dilution Factor: 

Dichlorodifluoromethane <5 <5 

Chloromethane <5 <5 

Vinyl chloride <2 <2 

Bromo methane <2 <2 

Chloroethane <5 <5 

T richlorofluoromethane <5 <5 

Diethyl Ether <5 <5 

Acetone < 10 <10 

1,1-Dichloroethene 14 < 1 

tert-Butyl Alcohol (TBA) < 30 < 30 

Methylene chloride <5 <5 

Carbon disulfide <5 6 

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

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

Isopropyl ether(DIPE) <5 <5 

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

trans-1 .2-Dichloroethene <2 <2 

1,1-Dichloroethane 21 <2 

2 ,2-Dichloropropane <2 <2 

cis-1,2-Dichloroethene <2 <2 

2-Butanone(MEK) < 10 <10 

Bromochloromethane <2 <2 

Tetrahydrofuran{THF) < 10 < 10 

Chloroform <2 <2 

1,1,1-Trichloroethane 3 <2 

Carbon tetrachloride <2 <2 

1 ,1-Dichloropropene <2 <2 

Benzene < 1 < 1 

1 ,2-Dichloroethane <2 <2 

T richloroethene <2 <2 

1,2-Dichloropropane <2 <2 

Dibromomethane <2 <2 

Bromodichloromethane <2 <2 

4-Methyl-2-pentanone(MIBK) < 10 <10 

cis-1 ,3-Dichloropropene <2 <2 

Toluene < 1 < 1 

trans-1 ,3-Dichloropropene <2 < 2 

1, 1,2-Trichloroethane <2 < 2 

2-Hexanone < 10 < 10 

T etrachloroethene <2 <2 

1,3-Dichloropropane <2 <2 

Dibromochloromethane <2 <2 

1,2-Dibromoethane(EDB) <2 <2 

Chlorobenzene <2 <2 

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

Ethvlbenzene < 1 < 1 

eastern analytical, inc. www.eailabs.com Phone: (603) 228-0525 2 
li\i\1\1 LAB ORA TORY REPORT 

Eastern Analytical, Inc. 10#: 65924 

Client: Sanborn, Head & Associates, Inc. 

(NH) 

Client Designation: Londonderry Town Garage 12049.01 

Sample ID: MW-2R Trip Blank 

l ab Sample ID: 65924.01 65924.02 

Matrix: aqueous aqueous 

Date Sampled: 11/9/07 10/29/07 

Date Received: 11/9/07 11/9/07 

Units : ug/1 ug/1 

Date of Analysis: 11/10/07 11/10/07 

Analyst: BAM BAM 

Method: 8260B 8260B 

Dilution Factor: 

mp Xylene < 1 < 1 

o-Xylene < 1 <1 

Styrene < 1 < 1 

Bromoform <2 <2 

lsoPropylbenzene < 1 < 1 

Bromo benzene <2 <2 

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

1,2,3-T richloropropane <2 <2 

n-Propylbenzene < 1 < 1 

2-Chlorotoluene <2 <2 

4-Chlorotoluene <2 <2 

1,3,5-Trimethylbenzene < 1 < 1 

tert-Butylbenzene < 1 < 1 

1,2 ,4-Trimethylbenzene < 1 < 1 

sec-Butylbenzene < 1 < 1 

1,3-Dichlorobenzene < 1 < 1 

p-lsopropyltoluene < 1 < 1 

1 A-Dichlorobenzene < 1 < 1 

1,2-Dichlorobenzene < 1 < 1 

n-Butylbenzene < 1 < 1 

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

1,2,4-Trichlorobenzene < 1 < 1 

Hexachlorobutadiene < 1 < 1 

Naphthalene <5 <5 

1,2 ,3-T richlorobenzene < 1 < 1 

4-Bromofluorobenzene (surr) 96 %R 97 %R 

1 .2-Dichlorobenzene-d4 (surr) 103 %R 104 %R 

A low level of carbon disulfide was found in the Trip Blank. There is no impact to the data since no carbon disulfide was 

found in the sample. 

eastern analytical, inc. www.eailabs.com Phone: (603) 228-0525 3 
lllAAI LA BORA TORY REPORT 

Eastern Analytical, Inc. 10#:65924 Batch 10: 

Client: Sanborn, Head & Associat es, Inc. Client Designation: Londonderry Town Garage 12049.01 

QC Report Date of Analysis 

Parameter Name Blank LCS LCS Dup Units Method --··- . -------

Dichlorodifluoromethane <5 ug/1 11/10/07 82608 

Chloromethane <5 ug/1 11/10/07 82608 

Vinyl chloride <2 ug/1 11/10/07 82608 

8romomethane <2 ug/1 11/10/07 82608 

Chloroethane <5 ug/1 11/10/07 82608 

T richlorofluoromethane <5 ug/1 11/10/07 82608 

Diethyl Ether <5 ug/1 11/10/07 82608 

Acetone < 10 ug// 11110/07 82608 

1,1-Dichloroethene < 1 24 (119 %R) 23 (116 %R) (3 RPD) ug/1 11/10/07 82608 

tert-Butyl Alcohol (T8A) < 30 ug/1 11/10/07 82608 

Methylene chloride <5 ug/1 11/10/07 82608 

Carbon disulfide <5 ug/1 11/10/07 82608 

Methyl-t-butyl ether(MT8E) <5 ug/1 11110/07 82608 

Ethyl-t-butyl ether(ET8E) <5 ug/1 11/10/07 82608 

Isopropyl ether(DIPE) <5 ug/1 11/10/07 82608 

tert-amyl methyl ether(T AME) <5 ug/1 11/10/07 82608 

trans-1,2-Dichloroethene <2 ug/1 11/10/07 82608 

1,1-Dichloroethane <2 ug/1 11/10/07 82608 

2,2-Dichloropropane <2 ug/1 11/10/07 82608 

cis-1 .2-Dichloroethene <2 ug/1 11/10/07 82608 

2-8utanone(MEK) < 10 ug/1 11/10/07 82608 

Bromochloromethane <2 ug/1 11/10/07 82608 

Tetrahydrofuran(THF) <10 ug/1 11/10/07 82608 

Chloroform <2 ug/1 11/10/07 82608 

1 ,1 , 1-Trichloroethane <2 ug/1 11/10/07 82608 

Carbon tetrachloride <2 ug/1 11/10/07 82608 

1,1-Dichloropropene <2 ugfl 11/10/07 82608 

Benzene <1 22 (111 %R) 23 (116 %R) (4 RPD) ug/1 11/10/07 82608 

1,2-Dichloroethane <2 ug/1 11/10/07 82608 

T richloroethene <2 21 (107 %R) 22 (110 %R) (3 RPD) ug/1 11/10/07 82608 

1,2-Dichloropropane <2 ug/1 11/10/07 82608 

Dibromomethane <2 ug/1 11/10/07 82608 

BromodichJoromethane <2 ug/1 11/10/07 82608 

4-Methyl-2-pentanone(M18K) < 10 ug/1 11/10/07 82608 

cis-1 ,3-Dichloropropene <2 ug/1 11/10/07 82608 

Toluene < 1 22 (110 %R) 22 (111 %R) (1 RPD) ug/1 11/10/07 82608 

trans-1,3-Dichloropropene <2 ug/1 11/10/07 82608 

1,1 ,2-Trichloroethane <2 ug/1 11/10/07 82608 

2-Hexanone <10 ug/1 11/10/07 82608 

T etrachloroethene <2 ug/1 11/10/07 82608 

1,3-Dichloropropane <2 ug/1 11/10/07 82608 

Dibromochloromethane <2 ug/1 11/10/07 82608 

1 ,2-Dibromoethane(ED8) <2 ug/1 11/10/07 82608 

Chlorobenzene <2 21 (107 %R) 22 (109 %R) (2 RPD) ug/1 11/10/07 82608 

eastern analytical, inc. www.eailabs.com Phone: (603) 228-0525 4 
1~1 LABORATORY REPORT 

Eastern Analytical, Inc. 10#:65924 Batch ID: 

Client: Sanborn, Head & Associates, Inc. Client Designation: Londonderry Town Garage 12049.01 

QC Report Date of Analysis 

Parameter Name Blank LCS LCS Dup Units Method 

1, 1,1,2-Tetrachloroethane <2 ug/1 11/10/07 82608 

Ethylbenzene < 1 ug/1 11/10/07 82608 

mp-Xylene < 1 ug/l 11/10/07 82608 

o-Xylene < 1 ug/1 11/10/07 82608 

Styrene < 1 ug/1 11/10/07 82608 

Bromoform <2 ug/1 11/10/07 82608 

lsoPropylbenzene < 1 ug/1 11/10/07 82608 

Bromobenzene <2 ug/1 11/10/07 82608 

1 ,1 ,2 .2-Tetrachloroethane <2 ug/1 11/10/07 82608 

1,2,3-T richloropropane <2 ug/1 11/10/07 82608 

n-Propylbenzene < 1 ug/1 11/10/07 82608 

2-Chlorotoluene <2 ug/1 11/10/07 82608 

4-Chlorotoluene <2 ug/1 11/10/07 82608 

1,3,5-Trimethylbenzene <1 ug/1 11/10/07 82608 

tert-Butylbenzene < 1 ug/1 11/10/07 82608 

1,2,4-Trimethylbenzene < 1 ug/1 11/10/07 82608 

sec-8utylbenzene <1 ug/1 11/10/07 82608 

1,3-Dichlorobenzene < 1 ug/1 11/10/07 82608 

p-lsopropyltoluene <1 ug/1 11/10/07 82608 

1 A-Dichlorobenzene < 1 ug/1 11/10/07 82608 

1,2-Dichlorobenzene < 1 ug/1 11/10/07 82608 

n-Butylbenzene < 1 ug/1 11110107 82608 

1,2-0ibromo-3-chloropropane <2 ug/1 11/10/07 82608 

1 ,2,4-T richlorobenzene < 1 ug/1 11110/07 82608 

Hexachlorobutadiene < 1 ug/1 11/10/07 82608 

Naphthalene <5 ug/1 11/10/07 82608 

1,2,3-Trichlorobenzene < 1 ug/1 11/10/07 82608 

4-Bromofluorobenzene (surr) 97%R 101 %R 101 %R % Rec 11/10/07 82608 

1,2-Dichlorobenzene-d4 (surr) 102%R 99 %R 100%R % Rec 11/10/07 82608 

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

Eastern Analytical, Inc. 10#:65924 Batch 10: 

Client: Sanborn, Head & Associates, Inc. (NH) Client Designation: Londonderry Town Garage 1 2049.01 

Volatile Organic Compounds QC limits and Narrative Summary 

Matrix: Solid RPD Aqueous RPD 

Units: % % % % 

EPA Method 82608 82608 

Surrogate Recovery 

4-Bromofluorobenzene 74-121 86-115 

1,2-Dichlorobenzene-04 80-120 80-120 

Matrix Spike Recovery 

1, 1-Dichloroethene 59-172 30 61-145 20 

T richloroethene 62-137 30 71-120 20 

Benzene 66-142 30 76-127 20 

Toluene 59-139 30 76-125 20 

Chlorobenzene 60-133 30 75-130 20 

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. 

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

There were no exceptions in the analyses, unless noted. 

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