Embed Size (px)
Citation preview
Site Investigation Work Scope Corrective Action Feasibility Investigation Technical Report Corrective Action Plan PCF Reimbursement Request Corrective Action Summary Report General Correspondence Operations & Monitoring Report
MAY 2016 GROUNDWATER MONITORING REPORTFORMER STEVE'S MOBIL
18 SYKES MOUNTAIN AVENUEHARTFORD, VERMONT
SMS #2003-3134
Prepared for:
Summit Distributing, LLC240 Mechanic Street
Lebanon, New Hampshire 03766Contact: Thomas Frawley
Tel: (603) 448-4000
Prepared by:
GeoInsight, Inc.186 Granite Street, 3rd Floor, Suite AManchester, New Hampshire 03101
Contacts: Darrin L. Santos/Peter D. FrankTel: (603) 314-0820
August 31, 2016
GeoInsight Project 5063-000File: 5063-000/May16_CVR
(check one) (check one)
SUBMITTAL TYPEPROJECT PHASE
August 31, 2016 GeoInsight Project 5063-000
Gerold Noyes, P.E.
Sites Management Section
Vermont Department of Environmental Conservation
103 South Main Street, West Building
Waterbury, VT 05671
RE: May 2016 Groundwater Monitoring Report
Former Steve’s Mobil – SMS #2003-3134
18 Sykes Mountain Avenue
Hartford, Vermont
Dear Mr. Noyes:
At the request of Summit Distributing, LLC, GeoInsight, Inc. (GeoInsight) prepared this report
summarizing the May 2016 groundwater monitoring event at the former Steve’s Mobil property
located at 18 Sykes Mountain Avenue in Hartford, Vermont. A site locus map is presented as
Figure 1 and a site plan is presented as Figure 2.
The groundwater monitoring event was requested by the Vermont Department of Environmental
Conservation (VTDEC) in a letter dated August 21, 2014 (Attachment A). The May 2016
monitoring event was the eighth event completed following the excavation of 1,905 tons of
gasoline-impacted soil from the former underground storage tank (UST) and pump island areas
and the decommissioning of the former USTs and pump island in May 2009. Concurrent with
the May 2009 impacted soil excavation and UST closure activities, the property was redeveloped
with a new convenience store, USTs, and pump islands. The historical and current property
features are illustrated on Figure 2.
GROUNDWATER MONITORING EVENT
Sampling and Analysis
Prior to sample collection, static water level measurements were obtained using an electronic
water level indicator. Groundwater was encountered in six wells; however, the thickness of
water encountered in wells GES-2R, MW-1R, and MW-2R was insufficient for purging and
sampling of those wells. On May 26, 2016, GeoInsight collected groundwater samples from
monitoring wells GES-1R, MW-3R, and MW-4R, which contained sufficient water for purging
and sampling. Table 1 summarizes current and historical groundwater elevations and historical
light non-aqueous phase liquid (LNAPL) gauging data.
GeoInsight, Inc.
186 Granite Street, 3rd Floor, Suite A Manchester, NH 03101-2643
Tel (603) 314-0820
Fax (603) 314-0821
www.geoinsightinc.com
GeoInsight, Inc.
One Monarch Drive, Suite 201 Littleton, MA 01460-1440
Tel (978) 679-1600
Fax (978) 679-1601
GeoInsight, Inc.
200 Court Street, 2nd Floor Middletown, CT 06457-3341
Tel (860) 894-1022
Fax (860) 894-1023
August 31, 2016
GeoInsight Project 5063-000 Page 2
Groundwater samples were collected from the three monitoring wells by GeoInsight using new
dedicated, disposable polyethylene bailers. Prior to sample collection, three times the volume of
water in the wells was purged using the bailers from wells GES-1R and MW-4R. The sample
from well MW-3R was collected with a bailer without purging as only 0.4 feet of water was
present in the well.
The groundwater samples were analyzed by United States Environmental Protection Agency
(USEPA) Method 8260B and the results were reported using the VTDEC USEPA Method 8021
list for selected petroleum constituents. Table 2 provides a current and historical summary of
groundwater volatile organic compound (VOC) data for the site. The laboratory analytical report
for the May 2016 monitoring event is presented in Attachment B. An updated discussion of
groundwater impacts at the site is provided in the Updated Conceptual Model section of this
report.
Quality Assurance/Quality Control
In general, the quality assurance/quality control (QA/QC) samples indicated that the data
collected were technically sound, usable, and meet the data quality objectives of on-going site
investigation activities. Although the sample from well MW-3R in May 2016 was obtained
without purging the well, the concentrations of benzene and MTBE detected in 2014 and 2016
are comparable, indicating that the omission of purging did not produce sample QA/QC
concerns.
A trip blank sample was included by the laboratory with the sample containers for this
monitoring event. VOCs were not detected above the laboratory practical quantitation limits in
the trip blank samples submitted for the May 2016 monitoring event. GeoInsight also reviewed
the surrogate recovery data reported by the laboratory for the May 2016 monitoring event, which
were within the acceptable limits listed by the laboratory in the analytical reports.
UPDATED CONCEPTUAL MODEL
Groundwater Elevations and Flow Direction
Using the groundwater elevation data collected in May 2016, GeoInsight plotted inferred
groundwater elevation contours, which are presented on Figure 3. The observed groundwater
flow pattern, as illustrated on Figure 3, was to the west. This finding was consistent with
previous flow directions mapped by GeoInsight at this site prior to, and following, the May 2009
impacted soil excavation.
Historically, groundwater elevations have fluctuated significantly at the site. Based upon the
historical summary of groundwater gauging data (Table 1), groundwater has fluctuated as much
as approximately 16 to 17 feet in wells MW-2 and MW-3. Monitoring well MW-5 has
historically shown the least water table fluctuation (approximately 3 feet). Also, wells
MW-1/1R, MW-2/2R, MW-3, and GES-2/2R (which are located on the west-southwest corner of
the site) were dry on one or more previous monitoring events, including dry conditions at
®
August 31, 2016
GeoInsight Project 5063-000 Page 3
well s MW-1R, MW-2R, and GES-2/2R during May 2016. The depth to groundwater mea
surements observed in the post-excavation replacement wells during the May 2016 sampling eve nt
were near the low-end (deepest) in the historical range observed in corresponding
pre-exca vation measurements.
Groundwater Analytical Results
The location of the dissolved plume of VOCs, based upon the concentrations of benzene and
methyl tertiary butyl ether detected in the site monitoring wells during May 2016, is illustrated
on Figure 4. Since three key monitoring wells could not be sampled due to insufficient
groundwater, the plume iso-contour plan was developed using both available 2016 data and 2014
data for the wells not sampled in 2016. The lateral limits and location of the center of mass of
the dissolved plume remains consistent from the pre-excavation conditions, with the exception
that conditions at well MW-4R are significantly improved when compared to pre-excavation
conditions. During the five monitoring events prior to 2016, naphthalene has been the only
detected VOC in samples collected from well MW-4R that exceeded the applicable Vermont
Primary Groundwater Enforcement Standard (VPGES). In 2016, naphthalene was detected
below the VPGES.
Also, another important finding with regard to groundwater quality at the site following the
remedial action, is that the excavation has removed the LNAPL source from the vicinity of the
monitoring wells. LNAPL has not been encountered in replacement monitoring wells sampled
during the eight post-excavation monitoring events (August 2009 through May 2016). Prior to
the remedial excavation, wells MW-1, MW-2, and MW-3 contained LNAPL during most
sampling events. In addition, wells GES-2 (on two historical events) and MW-4 (on one
historical event) occasionally contained LNAPL.
To initiate an on-going analysis of potential trends in post-excavation dissolved VOC data,
time-series concentration charts were constructed for wells MW-1/1R, MW-3/3R, MW-4/4R,
and GES-2/2R (Attachment C). These charts will serve to assist in evaluating the effects of the
remedial excavation on long-term groundwater constituent trends as they are updated with future
groundwater monitoring data. The time-series chart for well MW-3/3R, and more so, the chart
for MW-4/4R support a trend of decreasing VOC concentrations in the eight monitoring events
completed after the May 2009 excavation.
RECOMMENDATION
GeoInsight recommends continuing long-term groundwater monitoring for the site (annual or
biennial). The monitoring program will be consistent with the post-excavation monitoring plan
outlined in the Corrective Action Plan for the project, dated February 19, 2009. A revised Work
Plan/Cost Estimate (WP/CE) updated to reflect the Petroleum Cleanup Fund rates in the
September 2014 manual is included as Attachment D. GeoInsight will proceed with the next
requested sampling event upon being issued a WP/CE tracking number from the VTDEC.
®
August 31, 2016
GeoInsight Project 5063-000 Page 4
The sampling will be conducted in late March or early April (after snow melt) during a pe riod
when groundwater levels are expected to be higher than May.
If you have questions regarding the contents of this report, please call us at (603) 314-0820.
Sincerely,
GEOINSIGHT, INC.
Darrin L. Santos, P.G. Peter D. Frank, P.G.
Senior Geologist Associate/Senior Hydrogeologist
Attachments
cc: Summit Distributing, LLC
P:\5063 Summit Distr. Steves Mobil, Hartford, VT\GW monitoring\May 2016\5063May2016GWrpt.doc
®
FIGURES
®
GeoInsight
Practical in Nature
GeoInsight
Practical in Nature
GeoInsight
Practical in Nature
GeoInsight
Practical in Nature
TABLES
®
TABLE 1
SUMMARY OF GROUNDWATER ELEVATION DATA
FORMER STEVE'S MOBIL
18 SYKES MOUNTAIN AVENUE
HARTFORD, VERMONT
SMS #2003-3134
WELL I.D.
REFERENCE
ELEVATION
(FT) (Note 2)
MONITORING DATE
(Note 3)
DEPTH TO
LNAPL (FT)
DEPTH TO
GROUNDWATER
(FT)
LNAPL
THICKNESS (FT)
RELATIVE
GROUNDWATER
ELEVATION (FT)
MW-1 498.66 June-04 NA NA
September-04 NA NA
October-04 DRY NA
September-05 20.66 478.00
December-05 15.18 483.48
May-06 16.21 482.45
October-06 22.57 476.09
November-06 16.71 481.95
April 9, 2007* 19.07 479.59
May 30, 2007 NM NM NM
July 6, 2007 16.44 16.46 0.02 482.22
September 27, 2007** 17.82 droplets/globules 480.84
December 20, 2007** 19.12 droplets/globules 479.54
April 16, 2008** 10.63 droplets/globules 488.03
April 30, 2008**
May 30, 2008 11.91 11.92 0.01 486.75
July 30, 2008 12.19 486.47
October 17, 2008** 15.49 15.51 0.02 483.17
October 29, 2008** 16.34 482.32
December 23, 2008** 16.55 482.11
MW-1R 98.89 August 5, 2009 13.08 85.81
December 9, 2009 19.79 79.10
May 3, 2010 24.43 74.46
October 29, 2010 23.88 75.01
May 9, 2011 19.29 79.60
May 16, 2012 24.08 74.81
May 8, 2014 22.35 76.54
May 26, 2016 24.40 74.49
MW-2 498.01 June-04 NA NA
September-04 NA NA
October-04 DRY NA
September-05 DRY NA
December-05 21.72 476.29
May-06 6.62 491.39
October-06 7.61 490.40
November-06 7.04 490.97
April 9, 2007* 21.27 21.93 0.66 476.65
May 30, 2007 21.65 22.41 0.76 476.26
July 6, 2007** 23.20 23.45 0.25 474.78
September 27, 2007** 24.53 No Water to 24.81 0.28 NA
December 20, 2007**
April 16, 2008** 17.01 481.00
April 30, 2008 8.55 8.70 0.15 489.44
May 30, 2008 20.83 21.60 0.77 477.08
July 30, 2008 22.00 22.15 0.15 475.99
October 17, 2008** 23.75 474.26
October 29, 2008** 23.81 474.20
December 23, 2008**
MW-2R 98.62 August 5, 2009 18.05 80.57
December 9, 2009 21.99 76.63
May 3, 2010 21.36 77.26
October 29, 2010
May 9, 2011 18.95 79.67
May 16, 2012
May 8, 2014 22.41 76.21
May 26, 2016 24.15 74.47
Dry to 23.4 feet
Well could not be accessed due to snow pile.
Dry to 24.3 feet
Dry to 20.19 feet
Dry to 24.3 feet
9/1/2016
GeoInsight Project 5063-000:5063May2016tables.xls:gw elev Page 1 of 4
TABLE 1
SUMMARY OF GROUNDWATER ELEVATION DATA
FORMER STEVE'S MOBIL
18 SYKES MOUNTAIN AVENUE
HARTFORD, VERMONT
SMS #2003-3134
WELL I.D.
REFERENCE
ELEVATION
(FT) (Note 2)
MONITORING DATE
(Note 3)
DEPTH TO
LNAPL (FT)
DEPTH TO
GROUNDWATER
(FT)
LNAPL
THICKNESS (FT)
RELATIVE
GROUNDWATER
ELEVATION (FT)
MW-3 498.17 June-04 NA NA
September-04 NA NA
October-04 DRY NA
September-05 DRY NA
December-05 20.89 477.28
May-06 7.06 491.11
October-06 8.27 489.90
November-06 7.80 490.37
April 9, 2007* 21.01 21.43 0.42 477.11
May 30, 2007 21.41 21.87 0.46 476.70
July 6, 2007** 22.90 23.14 0.24 475.24
September 27, 2007**
December 20, 2007**
April 16, 2008** 14.92 22.89 7.97 482.21
April 30, 2008** 19.38 21.59 2.21 478.50
May 30, 2008 20.75 21.76 1.01 477.29
July 30, 2008 21.56 21.95 0.39 476.56
October 17, 2008** 23.00 24.50 1.50 474.98
October 29, 2008** 24.13 24.55 0.42 473.99
December 23, 2008** 21.91 22.70 0.79 476.16
MW-3R 98.37 August 5, 2009 19.75 78.62
December 9, 2009 20.86 77.51
May 3, 2010 20.88 77.49
October 29, 2010 23.37 75.00
May 9, 2011 19.20 79.17
May 16, 2012 23.65 74.72
May 8, 2014 21.21 77.16
May 26, 2016 23.88 74.49
MW-4 498.61 June-04 NA NA
September-04 NA NA
October-04 23.71 474.90
September-05 23.50 475.11
December-05 20.03 478.58
May-06 9.41 489.20
October-06 12.50 486.11
November-06 10.30 488.31
April 9, 2007* 19.99 478.62
May 30, 2007 19.49 479.12
July 6, 2007 21.46 477.15
September 27, 2007 23.23 475.38
December 20, 2007 24.84 473.77
April 16, 2008 13.33 485.28
April 30, 2008 NM NM NM
May 30, 2008 NM NM NM
July 30, 2008 18.35 480.26
October 17, 2008 21.56 477.05
October 29, 2008 NM NM NM
December 23, 2008 NM NM NM
MW-4R 98.24 August 5, 2009 10.07 88.17
December 9, 2009 11.35 86.89
May 3, 2010 12.03 86.21
October 29, 2010 19.80 78.44
May 9, 2011 11.10 87.14
May 16, 2012 17.97 80.27
May 8, 2014 12.77 85.47
May 26, 2016 17.95 80.29
Dry to 23.60 feet
Dry to 23.60 feet
9/1/2016
GeoInsight Project 5063-000:5063May2016tables.xls:gw elev Page 2 of 4
TABLE 1
SUMMARY OF GROUNDWATER ELEVATION DATA
FORMER STEVE'S MOBIL
18 SYKES MOUNTAIN AVENUE
HARTFORD, VERMONT
SMS #2003-3134
WELL I.D.
REFERENCE
ELEVATION
(FT) (Note 2)
MONITORING DATE
(Note 3)
DEPTH TO
LNAPL (FT)
DEPTH TO
GROUNDWATER
(FT)
LNAPL
THICKNESS (FT)
RELATIVE
GROUNDWATER
ELEVATION (FT)
MW-5 499.23 June-04 NA NA
September-04 NA NA
October-04 9.57 489.66
September-05 8.73 490.50
December-05 7.58 491.65
May-06 7.10 492.13
October-06 8.22 491.01
November-06 6.61 492.62
April 9, 2007* 7.73 491.50
May 30, 2007 NM NM NM
July 6, 2007 7.41 491.82
September 27, 2007 8.64 490.59
December 20, 2007 9.04 490.19
April 16, 2008 6.20 493.03
April 30, 2008 NM NM NM
May 30, 2008 NM NM NM
July 30, 2008 6.99 492.24
October 17, 2008 7.64 491.59
October 29, 2008 NM NM NM
December 23, 2008 NM NM NM
GES-1 498.43 June-04 10.97 487.46
September-04 12.82 485.61
October-04 15.03 483.40
September-05 12.58 485.85
December-05 8.91 489.52
May-06 9.78 488.65
October-06 12.25 486.18
November-06 15.04 483.39
April 9, 2007* 10.51 487.92
May 30, 2007 NM NM NM
July 6, 2007 9.21 489.22
September 27, 2007 11.30 487.13
December 20, 2007
April 16, 2008 6.37 492.06
April 30, 2008 NM NM NM
May 30, 2008 NM NM NM
July 30, 2008 NM NM NM
October 17, 2008 9.52 488.91
October 29, 2008 NM NM NM
December 23, 2008 NM NM NM
GES-1R 98.81 August 5, 2009 5.74 93.07
December 9, 2009 8.47 90.34
May 3, 2010 7.73 91.08
October 29, 2010 8.89 89.92
May 9, 2011 6.97 91.84
May 16, 2012 NM NM NM
May 8, 2014 8.12 91.84
May 26, 2016 10.86 87.95
Well could not be accessed due to snow pile.
Decommissioned/removed during May 2009 excavation.
9/1/2016
GeoInsight Project 5063-000:5063May2016tables.xls:gw elev Page 3 of 4
TABLE 1
SUMMARY OF GROUNDWATER ELEVATION DATA
FORMER STEVE'S MOBIL
18 SYKES MOUNTAIN AVENUE
HARTFORD, VERMONT
SMS #2003-3134
WELL I.D.
REFERENCE
ELEVATION
(FT) (Note 2)
MONITORING DATE
(Note 3)
DEPTH TO
LNAPL (FT)
DEPTH TO
GROUNDWATER
(FT)
LNAPL
THICKNESS (FT)
RELATIVE
GROUNDWATER
ELEVATION (FT)
GES-2 498.64 June-04 17.03 481.61
September-04 19.90 478.74
October-04 DRY DRY
September-05 DRY DRY
December-05 13.79 484.85
May-06 17.88 480.76
October-06 23.00 475.64
November-06 19.31 479.33
April 9 , 2007* 15.57 483.07
May 30, 2007 NM NM NM NM
July 6, 2007 14.56 484.08
September 27, 2007 16.90 481.74
December 20, 2007
April 16, 2008 9.19 droplets/globules 489.45
April 30, 2008**
May 30, 2008 11.36 487.28
July 30, 2008 10.86 487.78
October 17, 2008** 13.84 14.00 0.16 484.31
October 29, 2008** 13.62 droplets/globules 485.02
December 23, 2008** 13.36 485.28
GES-2R 98.86 August 5, 2009 17.61 81.25
December 9, 2009 20.28 78.58
May 3, 2010 20.06 78.80
October 29, 2010 24.09 74.77
May 9, 2011 18.97 79.89
May 16, 2012 23.92 74.94
May 8, 2014 22.40 76.46
May 26, 2016 24.55 74.31
GES-3 499.27 June-04 8.95 490.32
September-04 9.72 489.55
October-04 9.73 489.54
September-05 10.29 488.98
December-05 8.89 490.38
May-06 18.17 481.10
October-06 20.59 478.68
November-06 18.05 481.22
April 9, 2007* 9.35 489.92
May 30, 2007 NM NM NM
July 6, 2007 8.46 490.81
September 27, 2007 10.25 489.02
December 20, 2007 10.39 488.88
April 16, 2008 6.61 492.66
April 30, 2008 NM NM NM
May 30, 2008 NM NM NM
July 30, 2008 NM NM NM
October 17, 2008 8.56 490.71
October 29, 2008 NM NM NM
December 23, 2008 NM NM NM
NOTES:
1. Depth to groundwater measurements are from the top of polyvinyl chloride (PVC) well casings.
2. Prior to August 5, 2009, survey/reference elevations obtained from historical site investigation documents. GeoInsight, Inc. (GeoInsight)
surveyed reference elevation at post-era replacement wells during July 2009.
3. Prior to April 9, 2007 (*), measurements were performed by Pathways Consulting, LLC (Pathways).
4. FT = feet; LNAPL = light non-aqueous phase liquid; NA = not applicable; NM = not measured.
5. ** indicates that the depth to groundwater and LNAPL measurement were made while a sorbent sock from a
previous event was still deployed in the well.
6. Where applicable, groundwater elevations were corrected to account for the presence of LNAPL using the following equation:
Reference elevation - (depth to groundwater - [LNAPL thickness * 0.87]), where 0.87 equals the specific gravity of gasoline.
7. Sampling prior to April 9, 2007 was performed by either Pathways (*) or Groundwater and Environmental
Services, Inc. Sampling dates prior to November 2006 were not readily available to GeoInsight. Therefore, the day
the monitoring event was performed in was not listed.
Dry to 20.19 feet
Dry to 20.19 feet
Decommissioned/removed during May 2009 excavation.
9/1/2016
GeoInsight Project 5063-000:5063May2016tables.xls:gw elev Page 4 of 4
TABLE 2
SUMMARY OF GROUNDWATER ANALYTICAL DATA
FORMER STEVE'S MOBIL
18 SYKES MOUNTAIN AVENUE
HARTFORD, VERMONT
SMS #2003-3134
Ben
zen
e
To
luen
e
Eth
ylb
enze
ne
Xy
len
es (
tota
l)
Na
ph
tha
len
e
Iso
pro
py
lben
zen
e
1, 2
, 4
-Tri
met
hy
lben
zen
e
1, 3
, 5
-Tri
met
hy
lben
zen
e
To
tal
1,2
,4-T
MB
& 1
,3,5
-TM
B
Met
hy
l T
erti
ary
Bu
tyl
Eth
er
(MT
BE
)
Ter
tia
ry B
uty
l A
lco
ho
l
(TB
A)
Ter
tia
ry A
my
l M
eth
yl
Eth
er
(TA
ME
)
Di-
iso
pro
py
l et
her
(D
IPE
)
Tri
chlo
roet
hen
e
Ace
ton
e
4-M
eth
yl-
2-
pen
tan
on
e (M
IBK
; M
eth
yl
Iso
bu
tyl
Ket
on
e)
2-H
exa
no
ne
Oth
er V
OC
s
5 1,000 700 10,000 20 NS 350 40 NS NS NS 5 700 560 NS CS
GES-1 June-04 ND ND ND ND ND DNR ND ND ND 2 DNR DNR DNR DNR DNR DNR DNR DNR
September-04 ND ND ND ND ND DNR ND ND ND ND DNR DNR DNR DNR DNR DNR DNR DNR
October-04 ND ND ND 1.1 ND DNR ND ND ND ND DNR DNR DNR DNR DNR DNR DNR DNR
September-05 ND ND ND ND ND DNR NA NA NA ND DNR DNR DNR DNR DNR DNR DNR DNR
December-05 2 ND 7 56 ND DNR 10 3 13 10 DNR DNR DNR DNR DNR DNR DNR DNR
July-06 ND ND ND ND ND DNR ND ND ND 3 DNR DNR DNR DNR DNR DNR DNR DNR
October-06 ND ND ND ND ND DNR 3 91 94 4 DNR DNR DNR DNR DNR DNR DNR DNR
November 29, 2006 432 4,610 781 4,590 63 16 418 91 509 44 ND(80) ND(16) ND(16) ND(8) ND(400) ND(200) ND(200) n-propylbenzene (39)
April 9, 2007* ND(2) ND(2) ND(2) ND(4) ND(5) ND(2) ND(2) ND(2) ND ND(2) NA NA NA ND(2) ND(10) ND(10) ND(10) ND
July 6, 2007 ND(2) ND(2) ND(2) ND(4) ND(5) NA ND(2) ND(2) ND ND(2) NA NA NA NA NA NA NA ND
September 27, 2007 ND(2) ND(2) ND(2) ND(4) ND(5) NA ND(2) ND(2) ND ND(2) NA NA NA NA NA NA NA ND
December 20, 2007
April 16, 2008
October 17, 2008
GES-1R August 5, 2009 ND(2) ND(2) ND(2) ND(4) ND(5) NA ND(2) ND(2) ND ND(2) NA NA NA NA NA NA NA ND
December 9, 2009 ND(2) ND(2) ND(2) ND(4) ND(5) NA ND(2) ND(2) ND ND(2) NA NA NA NA NA NA NA ND
May 3, 2010 ND(2) ND(2) ND(2) ND(4) ND(5) NA ND(2) ND(2) ND ND(2) NA NA NA NA NA NA NA ND
October 29, 2010 ND(2) ND(2) ND(2) ND(4) ND(5) NA ND(2) ND(2) ND ND(2) NA NA NA NA NA NA NA ND
May 9, 2011 ND(2) ND(2) ND(2) ND(4) ND(5) NA ND(2) ND(2) ND ND(2) NA NA NA NA NA NA NA ND
May 18, 2012 ND(2) ND(2) ND(2) ND(2) ND(5) NA ND(2) ND(2) ND ND(2) NA NA NA NA NA NA NA ND
May 8, 2014 ND(2) ND(2) ND(2) ND(2) ND(5) NA ND(2) ND(2) ND ND(2) NA NA NA NA NA NA NA ND
May 26, 2016 ND(2) ND(2) ND(2) ND(2) ND(5) NA ND(2) ND(2) ND ND(2) NA NA NA NA NA NA NA ND
GES-2 June-04 27.8 75.3 86.2 440 162 DNR 1,860 524 ND 538 DNR DNR DNR DNR DNR DNR DNR DNR
September-04 18.7 72.9 96.7 511 137 DNR 1,620 559 ND 870 DNR DNR DNR DNR DNR DNR DNR DNR
October-04 DRY DRY DRY DRY DRY DRY DRY DRY ND DRY DRY DRY DRY DRY DRY DRY DRY DRY
September-05 DRY DRY DRY DRY DRY DRY DRY DRY NA DRY DRY DRY DRY DRY DRY DRY DRY DRY
December-05 168 ND ND 256 ND DNR 1,020 380 1,400 10,800 DNR DNR DNR DNR DNR DNR DNR DNR
July-06 58 5 47 7 ND DNR 158 119 ND 9,600 DNR DNR DNR DNR DNR DNR DNR DNR
October-06 ND(35) ND(35) ND(35) ND(35) ND(70) DNR 269 194 463 5,610 DNR DNR DNR DNR DNR DNR DNR DNR
November-06 608 4,210 332 2,566 54 ND(16) 455 165 620 4,700 ND(16) 226 ND(32) ND(16) ND(800) ND(400) ND(400) n-propylbenzene (55)
April 9, 2007* 51 ND(20) ND(20) ND(40) ND(50) ND(20) 220 220 440 5,900 NA NA NA ND(20) 65 150 240 n-propylbenzene (21)
July 6, 2007 ND(40) ND(40) ND(40) 46 ND(100) NA 140 120 260 4,700 NA NA NA NA ND*** ND*** ND*** ND
September 27, 2007 97 ND(40) ND(40) 226 ND(100) NA 550 210 760 5,700 NA NA NA NA NA NA NA ND
December 20, 2007 DRY DRY DRY DRY DRY DRY DRY DRY NA DRY DRY DRY DRY DRY DRY DRY DRY DRY
April 16, 2008
July 30, 2008 ND(100) 4,900 3,600 19,300 660 NA 6,200 1,900 8,100 ND(100) NA NA NA NA NA NA NA ND
October 17, 2008
GES-2R August 5, 2009 1,300 10,000 770 5,800 540 NA 2,400 500 2,900 3,400 NA NA NA NA NA NA NA ND
December 9, 2009 620 3,700 1,100 5,500 810 NA 3,700 1,000 4,700 4,500 NA NA NA NA NA NA NA ND
May 3, 2010 790 4,600 930 5,200 770 NA 4,000 1,200 5,200 4,300 NA NA NA NA NA NA NA ND
October 29, 2010 480 4,100 950 6,300 920 NA 4,500 1,100 5,600 4,200 NA NA NA NA NA NA NA ND
May 9, 2011 520 3,100 1,400 8,100 1,500 NA 5,500 1,800 7,300 2,700 NA NA NA NA NA NA NA ND
May 16, 2012 470 3,700 1,200 5,700 1,200 NA 7,200 2,000 9,200 3,600 NA NA NA NA NA NA NA ND
May 8, 2014 170 1,300 490 4,440 560 NA 3,900 1,000 4,900 2,500 NA NA NA NA NA NA NA ND
May 26, 2016
Volatile Organic Compounds (VOCs)
Wel
l I.
D.
Sa
mp
le D
ate
analyte concentrations in micrograms per liter (ug/L)
VPGESs 1
Well not sampled (LNAPL droplets/globules encountered in well). Product recovery performed by bailing and sorbent sock deployed in well.
Well not sampled during monitoring event.
Refer to next
column>>>>
Well not sampled (covered by snow pile).
Well not sampled. LNAPL (0.16 feet) encountered in well. LNAPL sorbent sock removed from well and product recovery performed by bailing.
Well not sampled during monitoring event.
Unable to sample. Insufficient water in well for purging and sampling (0.1 feet)
9/1/2016
GeoInsight Project 5063-000:5063May2016tables.xls:VOCs Page 1 of 4
TABLE 2
SUMMARY OF GROUNDWATER ANALYTICAL DATA
FORMER STEVE'S MOBIL
18 SYKES MOUNTAIN AVENUE
HARTFORD, VERMONT
SMS #2003-3134
Ben
zen
e
To
luen
e
Eth
ylb
enze
ne
Xy
len
es (
tota
l)
Na
ph
tha
len
e
Iso
pro
py
lben
zen
e
1, 2
, 4
-Tri
met
hy
lben
zen
e
1, 3
, 5
-Tri
met
hy
lben
zen
e
To
tal
1,2
,4-T
MB
& 1
,3,5
-TM
B
Met
hy
l T
erti
ary
Bu
tyl
Eth
er
(MT
BE
)
Ter
tia
ry B
uty
l A
lco
ho
l
(TB
A)
Ter
tia
ry A
my
l M
eth
yl
Eth
er
(TA
ME
)
Di-
iso
pro
py
l et
her
(D
IPE
)
Tri
chlo
roet
hen
e
Ace
ton
e
4-M
eth
yl-
2-
pen
tan
on
e (M
IBK
; M
eth
yl
Iso
bu
tyl
Ket
on
e)
2-H
exa
no
ne
Oth
er V
OC
s
5 1,000 700 10,000 20 NS 350 40 NS NS NS 5 700 560 NS CS
Volatile Organic Compounds (VOCs)
Wel
l I.
D.
Sa
mp
le D
ate
analyte concentrations in micrograms per liter (ug/L)
VPGESs 1 Refer to next
column>>>>
GES-3 June-04 ND ND ND ND ND DNR ND ND ND ND DNR DNR DNR DNR DNR DNR DNR DNR
September-04 ND ND ND ND ND DNR ND ND ND ND DNR DNR DNR DNR DNR DNR DNR DNR
October-04 ND ND ND ND ND DNR ND ND ND ND DNR DNR DNR DNR DNR DNR DNR DNR
September-05 ND 3 ND 6 ND DNR NA NA NA ND DNR DNR DNR DNR DNR DNR DNR DNR
December-05 ND 4 10 76 ND DNR 7 ND ND ND DNR DNR DNR DNR DNR DNR DNR DNR
July-06 8 46 6 33 ND DNR 5 2 7 5 DNR DNR DNR DNR DNR DNR DNR DNR
October-06 ND(2) ND(2) ND(2) ND(2) ND(2) DNR ND(2) ND(2) ND ND(2) DNR DNR DNR DNR DNR DNR DNR DNR
November 29, 2006 ND 1,520 314 1,623 37 10 202 45 247 5 DNR ND(100) ND(4) ND(2) ND(100) ND(50) ND(50) n-propylbenzene (21)
April 9, 2007* ND(2) ND(2) ND(2) ND(4) ND(5) ND(2) ND(2) ND(2) ND ND(2) NA NA NA ND(2) ND(10) ND(10) ND(10) ND
July 6, 2007 ND(2) ND(2) ND(2) ND(4) ND(5) NA ND(2) ND(2) ND ND(2) NA NA NA NA NA NA NA ND
September 27, 2007 ND(2) ND(2) ND(2) ND(4) ND(5) NA ND(2) ND(2) ND ND(2) NA NA NA NA NA NA NA ND
December 20, 2007 ND(2) ND(2) ND(2) ND(4) ND(5) NA ND(2) ND(2) ND ND(2) NA NA NA NA NA NA NA ND
April 16, 2008
October 17, 2008
MW-1 October-04 DRY DRY DRY DRY DRY DRY DRY DRY DRY DRY DRY DRY DRY DRY DRY DRY DRY DRY
September-05
December-05
July-06
October-06
November 29, 2006 5,440 46,900 4,440 27,760 394 ND(160) 3,050 491 3,541 4,910 2,210 839 ND(32) ND(160)** ND(8,000) ND(4,000) ND(4,000) ND
April 9, 2007* 18,000 64,000 6,700 41,000 ND(2,500) ND(1,000) 7,700 2,000 9,700 190,000 NA NA NA ND(1,000) ND(5,000) ND(5,000) ND(5,000) ND
July 6, 2007
September 27, 2007
December 20, 2007
April 16, 2008
July 30, 2008 10,000 61,000 5,500 38,000 910 NA 5,300 1,400 6,700 9,200 NA NA NA NA NA NA NA ND
October 17, 2008
MW-1R August 5, 2009 2,200 1,100 120 1,610 37 NA 260 75 335 870 NA NA NA NA NA NA NA ND
December 9, 2009 610 ND(10) 220 160 54 NA 170 82 252 150 NA NA NA NA NA NA NA ND
May 3, 2010 1,000 ND(10) 150 270 53 NA 210 170 380 180 NA NA NA NA NA NA NA ND
October 29, 2010 10,000 6,100 2,100 4,300 ND(250) NA 320 210 530 48,000 E NA NA NA NA NA NA NA ND
May 9, 2011 2,600 250 570 690 ND(100) NA 150 ND(40) 150 9,300 NA NA NA NA NA NA NA ND
May 22, 2012 1,200 320 ND(200) 270 ND(500) NA 550 200 750 27,000 NA NA NA NA NA NA NA ND
May 8, 2014 2,800 400 790 1,840 ND(100) NA 410 67 477 160,000 NA NA NA NA NA NA NA ND
May 26, 2016
Decommissioned/removed during May 2009 impacted soil excavation.
Well not sampled. LNAPL (0.08 feet) encountered in well.
Well not sampled. LNAPL (0.17 feet) encountered in well.
Well not sampled during monitoring event.
Well not sampled. LNAPL (0.02 feet) encountered in well.
Well not sampled. LNAPL (0.04 feet) encountered in well.
Well not sampled (LNAPL droplets/globules encountered in well). LNAPL sorbent sock removed from well, new sock deployed, and product recovery performed by bailing.
Well not sampled during monitoring event.
Well not sampled (LNAPL droplets/globules encountered in well). LNAPL sorbent sock removed from well, new sock deployed, and product recovery performed by bailing.
Well not sampled. LNAPL (0.02 feet) encountered in well. LNAPL sorbent sock removed from well and product recovery performed by bailing.
Unable to sample. Insufficient water in well for purging and sampling (0.15 feet)
Well not sampled. LNAPL (0.17 feet) encountered in well.
Well not sampled (LNAPL droplets/globules encountered in well). LNAPL sorbent sock removed from well, new sock deployed, and product recovery performed by bailing.
9/1/2016
GeoInsight Project 5063-000:5063May2016tables.xls:VOCs Page 2 of 4
TABLE 2
SUMMARY OF GROUNDWATER ANALYTICAL DATA
FORMER STEVE'S MOBIL
18 SYKES MOUNTAIN AVENUE
HARTFORD, VERMONT
SMS #2003-3134
Ben
zen
e
To
luen
e
Eth
ylb
enze
ne
Xy
len
es (
tota
l)
Na
ph
tha
len
e
Iso
pro
py
lben
zen
e
1, 2
, 4
-Tri
met
hy
lben
zen
e
1, 3
, 5
-Tri
met
hy
lben
zen
e
To
tal
1,2
,4-T
MB
& 1
,3,5
-TM
B
Met
hy
l T
erti
ary
Bu
tyl
Eth
er
(MT
BE
)
Ter
tia
ry B
uty
l A
lco
ho
l
(TB
A)
Ter
tia
ry A
my
l M
eth
yl
Eth
er
(TA
ME
)
Di-
iso
pro
py
l et
her
(D
IPE
)
Tri
chlo
roet
hen
e
Ace
ton
e
4-M
eth
yl-
2-
pen
tan
on
e (M
IBK
; M
eth
yl
Iso
bu
tyl
Ket
on
e)
2-H
exa
no
ne
Oth
er V
OC
s
5 1,000 700 10,000 20 NS 350 40 NS NS NS 5 700 560 NS CS
Volatile Organic Compounds (VOCs)
Wel
l I.
D.
Sa
mp
le D
ate
analyte concentrations in micrograms per liter (ug/L)
VPGESs 1 Refer to next
column>>>>
MW-2 October-04 DRY DRY DRY DRY DRY DRY DRY DRY DRY DRY DRY DRY DRY DRY DRY DRY DRY DRY
September-05 DRY DRY DRY DRY DRY DRY DRY DRY DRY DRY DRY DRY DRY DRY DRY DRY DRY DRY
December-05
July-06 DRY DRY DRY DRY DRY DRY DRY DRY DRY DRY DRY DRY DRY DRY DRY DRY DRY DRY
October-06
November 29, 2006 15,100 47,300E 4,420 29,900 463 115 3,200 741 3,941 130,000E 15,900 14,000 340 ND(80)** ND(4,000) ND(2,000) ND(2,000) n-propylbenzene (284)
April 9, 2007*
July 6, 2007
September 27, 2007
December 20, 2007
April 16, 2008 14,000 45,000 3,500 24,800 690 NA 4,200 1,200 5,400 180,000 NA NA NA NA NA NA NA ND
July 30, 2008
October 17, 2008 11,000 29,000 3,300 23,300 ND(2,500) NA 4,600 1,200 5,800 59,000 NA NA NA NA NA NA NA ND
MW-2R August 5, 2009 6,200 53,000 3,100 23,300 ND(500) NA 1,800 380 2,180 26,000 NA NA NA NA NA NA NA ND
December 9, 2009 12,000 57,000 4,600 24,400 ND(1,000) NA 2,700 950 3,650 110,000 NA NA NA NA NA NA NA ND
May 3, 2010 8,500 41,000 5,500 29,500 580 NA 3,700 970 4,670 67,000 NA NA NA NA NA NA NA ND
October 29, 2010 DRY DRY DRY DRY DRY DRY DRY DRY NA DRY DRY DRY DRY DRY DRY DRY DRY DRY
May 9, 2011 3,600 17,000 1,300 7,000 ND(250) NA 290 130 420 23,000 NA NA NA NA NA NA NA ND
May 16, 2012 DRY DRY DRY DRY DRY DRY DRY DRY DRY DRY DRY DRY DRY DRY DRY DRY DRY DRY
May 18, 2012 DRY DRY DRY DRY DRY DRY DRY DRY DRY DRY DRY DRY DRY DRY DRY DRY DRY DRY
May 8, 2014 370 39 79 215 ND(50) NA 31 ND(20) 31 3300 NA NA NA NA NA NA NA ND
May 26, 2016
MW-3 October-04 DRY DRY DRY DRY DRY DRY DRY DRY DRY DRY DRY DRY DRY DRY DRY DRY DRY DRY
September-05 DRY DRY DRY DRY DRY DRY DRY DRY DRY DRY DRY DRY DRY DRY DRY DRY DRY DRY
December-05 NS NS NS NS NS NS NS NS NS NS NS NS NS NS NS NS NS NS
July-06
October-06 74 1,050 2,130 12,100 382 DNR 1,880 518 2,398 199 DNR DNR DNR DNR DNR DNR DNR DNR
November 29, 2006 6,690 28,700 1,920 10,930 ND(60) ND(320) 930 ND(320) 930 395 ND(3,200) ND(640) ND(640) ND(320) ND(16,000) ND(8,000) ND(8,000) ND
April 9, 2007*
July 6, 2007
September 27, 2007
December 20, 2007
April 16, 2008
July 30, 2008
October 17, 2008
MW-3R August 5, 2009 8,900 34,000 250 13,200 590 NA 1,500 320 1,500 340 NA NA NA NA NA NA NA ND
December 9, 2009 9,400 20,000 1,700 8,500 ND(500) NA 1,400 460 1,860 ND(200) NA NA NA NA NA NA NA ND
May 3, 2010 8,800 13,000 2,300 10,300 550 NA 2,100 430 2,530 170 NA NA NA NA NA NA NA ND
October 29, 2010 5,200 3,000 1,200 4,600 300 NA 1,600 640 2,240 240 NA NA NA NA NA NA NA ND
May 9, 2011 4,400 6,900 1,400 5,500 ND(100) NA 780 270 1,050 330 NA NA NA NA NA NA NA ND
May 16, 2012 1,400 510 1,100 1,670 110 NA 700 310 1,010 450 NA NA NA NA NA NA NA ND
May 8, 2014 810 120 19 125 ND(25) NA 11 ND(10) 11 260 NA NA NA NA NA NA NA ND
May 26, 2016 930 ND(10) ND(10) 19 ND(25) NA ND(10) ND(10) ND 220 NA NA NA NA NA NA NA ND
Well not sampled. LNAPL (1.5 feet) encountered in well. LNAPL sorbent sock removed from well and product recovery performed by bailing.
Well not sampled. LNAPL (0.42 feet) encountered in well.
Well not sampled. LNAPL (0.66 feet) encountered in well.
Well not sampled. LNAPL (0.28 feet) encountered in well. LNAPL sorbent sock removed from well and product recovery performed by bailing.
Well not sampled. LNAPL (0.39 feet) encountered in well. LNAPL sorbent sock removed from well and product recovery performed by bailing.
Well not sampled. LNAPL (8 feet) encountered in well. Product recovery performed by bailing and sorbent sock deployed in well.
Well was dry and, therefore, was not sampled. Spent LNAPL sorbent sock removed and new sorbent deployed.
Well was dry and, therefore, was not sampled. Spent LNAPL sorbent sock removed and new sorbent deployed.
Well not sampled. LNAPL (0.04 feet) encountered in well.
Well not sampled. LNAPL (0.5 feet) encountered in well.
Well not sampled. LNAPL sorbent sock removed from well and product recovery performed by bailing.
Well not sampled. LNAPL (0.33 feet) encountered in well.
Well not sampled. LNAPL sorbent sock removed from well and product recovery performed by bailing.
Well not sampled. LNAPL (0.15 feet) encountered in well. LNAPL sorbent sock removed from well and product recovery performed by bailing.
Unable to sample. Insufficient water in well for purging and sampling (0.15 feet)
Well was dry and, therefore, was not sampled. Spent LNAPL sorbent sock removed and new sorbent deployed.
9/1/2016
GeoInsight Project 5063-000:5063May2016tables.xls:VOCs Page 3 of 4
TABLE 2
SUMMARY OF GROUNDWATER ANALYTICAL DATA
FORMER STEVE'S MOBIL
18 SYKES MOUNTAIN AVENUE
HARTFORD, VERMONT
SMS #2003-3134
Ben
zen
e
To
luen
e
Eth
ylb
enze
ne
Xy
len
es (
tota
l)
Na
ph
tha
len
e
Iso
pro
py
lben
zen
e
1, 2
, 4
-Tri
met
hy
lben
zen
e
1, 3
, 5
-Tri
met
hy
lben
zen
e
To
tal
1,2
,4-T
MB
& 1
,3,5
-TM
B
Met
hy
l T
erti
ary
Bu
tyl
Eth
er
(MT
BE
)
Ter
tia
ry B
uty
l A
lco
ho
l
(TB
A)
Ter
tia
ry A
my
l M
eth
yl
Eth
er
(TA
ME
)
Di-
iso
pro
py
l et
her
(D
IPE
)
Tri
chlo
roet
hen
e
Ace
ton
e
4-M
eth
yl-
2-
pen
tan
on
e (M
IBK
; M
eth
yl
Iso
bu
tyl
Ket
on
e)
2-H
exa
no
ne
Oth
er V
OC
s
5 1,000 700 10,000 20 NS 350 40 NS NS NS 5 700 560 NS CS
Volatile Organic Compounds (VOCs)
Wel
l I.
D.
Sa
mp
le D
ate
analyte concentrations in micrograms per liter (ug/L)
VPGESs 1 Refer to next
column>>>>
MW-4 October-04 461 6,420 1,940 10,100 73.4 DNR 927 295 1,222 3.5 DNR DNR DNR NA DNR DNR DNR DNR
September-05 ND(75) 1,790 2,160 10,780 281 DNR NA NA NA 311 DNR DNR DNR NA DNR DNR DNR DNR
December-05 27 2,590 3,840 18,610 435 DNR 2,960 717 3,677 231 DNR DNR DNR NA DNR DNR DNR DNR
July-06 135 1,250 1,740 8,020 253 DNR 943 282 1,225 260 DNR DNR DNR NA DNR DNR DNR DNR
October-06
November 29, 2006 337 2,190 1,050 5,250 ND(320) ND(160) 747 195 942 213 ND(1,600) ND(320) ND(320) ND(160)** ND(8,000) ND(4,000) ND(4,000) ND
April 9, 2007*
July 6, 2007 130 210 3,300 9,942 720 NA 2,900 840 3,740 290 NA NA NA NA NA NA NA ND
September 27, 2007 84 120 2,200 3,123 530 NA 2,400 600 3,000 250 NA NA NA NA NA NA NA ND
December 20, 2007 95 61 2,100 3,024 510 NA 2,300 680 2,980 290 NA NA NA NA NA NA NA ND
April 16, 2008 410 1,300 3,000 12,200 550 NA 3,600 1,000 4,600 330 NA NA NA NA NA NA NA ND
July 30, 2008 370 360 2,300 11,000 650 NA 3,200 970 4,170 350 NA NA NA NA NA NA NA ND
October 17, 2008 290 ND(40) 2,400 8,947 600 NA 3,400 970 4,370 260 NA NA NA NA NA NA NA ND
MW-4R August 5, 2009 ND(10) 29 80 2,800 250 NA 990 250 1,240 ND(10) NA NA NA NA NA NA NA ND
December 9, 2009 6 ND(2) 55 73 190 NA 180 130 310 ND(2) NA NA NA NA NA NA NA ND
May 3, 2010 ND(2) ND(2) 15 146 18 NA 90 78 168 ND(2) NA NA NA NA NA NA NA ND
October 29, 2010 2 ND(2) 79 18 330 NA 180 ND(2) 180 ND(2) NA NA NA NA NA NA NA ND
May 9, 2011 ND(2) ND(2) 31 42 120 NA 120 ND(2) 120 ND(2) NA NA NA NA NA NA NA ND
May 16, 2012 ND(2) ND(2) 41 65 99 NA 140 3 143 ND(2) NA NA NA NA NA NA NA ND
May 8, 2014 ND(2) ND(2) 11 12 25 NA 69 11 80 ND(2) NA NA NA NA NA NA NA ND
May 26, 2016 ND(2) ND(2) 4 3 16 NA 12 ND(2) 12 ND(2) NA NA NA NA NA NA NA ND
MW-5 October-04 ND ND ND ND ND DNR ND ND ND ND DNR DNR DNR DNR DNR DNR DNR DNR
September-05 ND 12 5 30 ND DNR NA NA NA ND DNR DNR DNR DNR DNR DNR DNR DNR
December-05 ND 3 14 117 ND DNR 9 3 12 ND DNR DNR DNR DNR DNR DNR DNR DNR
July-06 21 126 14 73 ND DNR 6 2 8 12 DNR DNR DNR DNR DNR DNR DNR DNR
October-06 ND ND ND ND ND DNR ND ND ND ND DNR DNR DNR DNR DNR DNR DNR DNR
November 29, 2006 21 416 61 373 ND(16) ND(8) 38 8 46 ND(8) ND(80) ND(16) ND(16) ND(8) ND(400) ND(200) ND(200) ND
April 9, 2007* ND(2) ND(2) ND(2) ND(4) ND(5) ND(2) ND(2) ND(2) ND ND(2) NA NA NA ND(2) ND(10) ND(10) ND(10) ND
July 6, 2007 ND(2) ND(2) ND(2) ND(4) ND(5) NA ND(2) ND(2) ND ND(2) NA NA NA NA NA NA NA ND
September 27, 2007 ND(2) ND(2) ND(2) ND(4) ND(5) NA ND(2) ND(2) ND ND(2) NA NA NA NA NA NA NA ND
December 20, 2007 ND(2) ND(2) ND(2) ND(4) ND(5) NA ND(2) ND(2) ND ND(2) NA NA NA NA NA NA NA ND
April 16, 2008 ND(2) ND(2) ND(2) ND(4) ND(5) NA ND(2) ND(2) ND ND(2) NA NA NA NA NA NA NA ND
July 30, 2008 ND(2) ND(2) ND(2) ND(4) ND(5) NA ND(2) ND(2) ND ND(2) NA NA NA NA NA NA NA ND
October 17, 2008 ND(2) ND(2) ND(2) ND(4) ND(5) NA ND(2) ND(2) ND ND(2) NA NA NA NA NA NA NA ND
NOTES:
1. VPGESs = Vermont Primary Groundwater Quality Enforcement Standards as presented in Chapter 12, Groundwater Protection Rule and Strategy, adopted February 14, 2005.
2. Sampling prior to April 9, 2007 (*) was performed by either Pathways Consulting, LLC or Groundwater and Environmental Services, Inc. Sampling dates prior to November 2006 were not readily available to
GeoInsight, Inc. (GeoInsight). Therefore, the day the monitoring event was performed in was not listed.
3. Results shaded and in bold font indicate constituent concentration was detected above the VPGES.
4. ND (x) = analyte not detected above the laboratory practical quantitation limit (PQL) noted in parentheses; ND = compound specific detection limit not reported/available; NS = VPGES not available; NA = compound not analyzed during monitoring event;
CS = compound specific laboratory PQL; DNR = data not reported or available to GeoInsight to summarize; LNAPL = light non-aqueous phase liquid; TMB = trimethylbenzene; Dry = monitoring well was dry during monitoring event.
5. Concentrations indicated in parentheses under the "Other VOCs" column indicate the detected concentrations of the noted analyte. A separate column was not provided for these analytes because of their infrequent detection at the site.
6. ** = The subcontract laboratory (Aquarian Analytical, Inc.) re-issued the laboratory reports for samples MW-1, MW-2, and MW-4 collected on November 29, 2006 with revised data for trichloroethene (TCE) with concentrations below the laboratory PQLs.
Previous detected concentrations of TCE for these samples were attributed to laboratory contamination from sample analysis carry-over.
7. *** = The analysis performed on the July 6, 2007 samples was by United States Environmental Protection Agency (USEPA) Method 8260B, reported as the USEPA Method 8021 VTDEC list of petroleum compounds. The laboratory indicated that concentrations
of acetone, methyl isobutyl ketone, and 2-hexanone were not detected above the laboratory PQLs in the July 6, 2007 sample collected from well GES-2.
8. E = detected concentration exceeded the calibration range for the analysis.
Decommissioned/removed during May 2009 impacted soil excavation.
Well not sampled. LNAPL (0.58 feet) encountered in well.
Well not sampled. Unable to extract polyethylene tubing left inside of well from previous monitoring event.
9/1/2016
GeoInsight Project 5063-000:5063May2016tables.xls:VOCs Page 4 of 4
ATTACHMENT A
VTDEC WORK REQUEST LETTER
®
ATTACHMENT B
MAY 2016 ANALYTICAL REPORT
®
Project: Former Steve's Mobil 5063
36680Job ID:
PO Number: None
5/27/16Date Received:
Darrin Santos
186 Granite Street
3rd Floor, Suite A
GeoInsight, Inc.
Manchester, NH 03103
Unless otherwise noted in the attached report, the analyses performed met the requirements of Absolute Resource Associates' Quality Assurance Plan. The Standard Operating Procedures are based upon USEPA SW-846, USEPA Methods for Chemical Analysis of Water and Wastewater, Standard Methods for the Examination of Water and Wastewater and other recognized methodologies. The results contained in this report pertain only to the samples as indicated on the chain of custody.
Absolute Resource Associates maintains certification with the agencies listed below.
We appreciate the opportunity to provide laboratory services. If you have any questions regarding the enclosed report, please contact the laboratory and we will be glad to assist you.
Total number of pages:
Date of Approval:
Sincerely,Absolute Resource Associates
Attached please find results for the analysis of the samples received on the date referenced above.
6/14/2016
4
Sue Sylvester
Principal, General Manager
124 Heritage Avenue Portsmouth NH 03801
Laboratory Report
124 Heritage Avenue | Portsmouth, NH 03801 | 603-436-2001 | absoluteresourceassociates.com
Absolute Resource Associates Certifications
New HampshireMaine NH903
1732 Massachusetts M-NH902
1
Former Steve's Mobil 5063Project ID:
36680Job ID:
GES-1R
Water
Sample ID:
Matrix:
Parameter ResultAnalysis
Date Time
Sample#:
Reporting Limit Reference
5/26/16 9:40Sampled:
36680-001
AnalystInstr Dil'n
FactorUnitsPrepDate Batch
methyl t-butyl ether (MTBE) 6/8/16< 2 2 SW5030C8260C1 8:57ug/L LMM 1601366
benzene 6/8/16< 2 2 SW5030C8260C1 8:57ug/L LMM 1601366
toluene 6/8/16< 2 2 SW5030C8260C1 8:57ug/L LMM 1601366
ethylbenzene 6/8/16< 2 2 SW5030C8260C1 8:57ug/L LMM 1601366
m&p-xylenes 6/8/16< 2 2 SW5030C8260C1 8:57ug/L LMM 1601366
o-xylene 6/8/16< 2 2 SW5030C8260C1 8:57ug/L LMM 1601366
naphthalene 6/8/16< 5 5 SW5030C8260C1 8:57ug/L LMM 1601366
1,3,5-trimethylbenzene 6/8/16< 2 2 SW5030C8260C1 8:57ug/L LMM 1601366
1,2,4-trimethylbenzene 6/8/16< 2 2 SW5030C8260C1 8:57ug/L LMM 1601366
dibromofluoromethane SUR 6/8/16107 SW5030C8260C1 8:57% LMM78-114
Surrogate Recovery Limits
1601366
toluene-D8 SUR 6/8/16107 SW5030C8260C1 8:57% LMM88-110 1601366
4-bromofluorobenzene SUR 6/8/1695 SW5030C8260C1 8:57% LMM86-115 1601366
SPACE
MW-4R
Water
Sample ID:
Matrix:
Parameter ResultAnalysis
Date Time
Sample#:
Reporting Limit Reference
5/26/16 9:45Sampled:
36680-002
AnalystInstr Dil'n
FactorUnitsPrepDate Batch
methyl t-butyl ether (MTBE) 6/8/16< 2 2 SW5030C8260C1 12:00ug/L LMM 1601366
benzene 6/8/16< 2 2 SW5030C8260C1 12:00ug/L LMM 1601366
toluene 6/8/16< 2 2 SW5030C8260C1 12:00ug/L LMM 1601366
ethylbenzene 6/8/164 2 SW5030C8260C1 12:00ug/L LMM 1601366
m&p-xylenes 6/8/163 2 SW5030C8260C1 12:00ug/L LMM 1601366
o-xylene 6/8/16< 2 2 SW5030C8260C1 12:00ug/L LMM 1601366
naphthalene 6/8/1616 5 SW5030C8260C1 12:00ug/L LMM 1601366
1,3,5-trimethylbenzene 6/8/16< 2 2 SW5030C8260C1 12:00ug/L LMM 1601366
1,2,4-trimethylbenzene 6/8/1612 2 SW5030C8260C1 12:00ug/L LMM 1601366
dibromofluoromethane SUR 6/8/16105 SW5030C8260C1 12:00% LMM78-114
Surrogate Recovery Limits
1601366
toluene-D8 SUR 6/8/16104 SW5030C8260C1 12:00% LMM88-110 1601366
4-bromofluorobenzene SUR 6/8/16103 SW5030C8260C1 12:00% LMM86-115 1601366
SPACE
2
Former Steve's Mobil 5063Project ID:
36680Job ID:
MW-3R
Water
Sample ID:
Matrix:
Parameter ResultAnalysis
Date Time
Sample#:
Reporting Limit Reference
5/26/16 9:55Sampled:
36680-003
AnalystInstr Dil'n
FactorUnitsPrepDate Batch
methyl t-butyl ether (MTBE) 6/8/16220 10 SW5030C8260C5 13:18ug/L LMM 1601366
benzene 6/8/16930 10 SW5030C8260C5 13:18ug/L LMM 1601366
toluene 6/8/16< 10 10 SW5030C8260C5 13:18ug/L LMM 1601366
ethylbenzene 6/8/16< 10 10 SW5030C8260C5 13:18ug/L LMM 1601366
m&p-xylenes 6/8/16< 10 10 SW5030C8260C5 13:18ug/L LMM 1601366
o-xylene 6/8/1619 10 SW5030C8260C5 13:18ug/L LMM 1601366
naphthalene 6/8/16< 25 25 SW5030C8260C5 13:18ug/L LMM 1601366
1,3,5-trimethylbenzene 6/8/16< 10 10 SW5030C8260C5 13:18ug/L LMM 1601366
1,2,4-trimethylbenzene 6/8/16< 10 10 SW5030C8260C5 13:18ug/L LMM 1601366
dibromofluoromethane SUR 6/8/16100 SW5030C8260C5 13:18% LMM78-114
Surrogate Recovery Limits
1601366
toluene-D8 SUR 6/8/16100 SW5030C8260C5 13:18% LMM88-110 1601366
4-bromofluorobenzene SUR 6/8/1698 SW5030C8260C5 13:18% LMM86-115 1601366
SPACE
Trip Blank
Water
Sample ID:
Matrix:
Parameter ResultAnalysis
Date Time
Sample#:
Reporting Limit Reference
5/26/16 0:00Sampled:
36680-004
AnalystInstr Dil'n
FactorUnitsPrepDate Batch
methyl t-butyl ether (MTBE) 6/8/16< 2 2 SW5030C8260C1 6:46ug/L LMM 1601366
benzene 6/8/16< 2 2 SW5030C8260C1 6:46ug/L LMM 1601366
toluene 6/8/16< 2 2 SW5030C8260C1 6:46ug/L LMM 1601366
ethylbenzene 6/8/16< 2 2 SW5030C8260C1 6:46ug/L LMM 1601366
m&p-xylenes 6/8/16< 2 2 SW5030C8260C1 6:46ug/L LMM 1601366
o-xylene 6/8/16< 2 2 SW5030C8260C1 6:46ug/L LMM 1601366
naphthalene 6/8/16< 5 5 SW5030C8260C1 6:46ug/L LMM 1601366
1,3,5-trimethylbenzene 6/8/16< 2 2 SW5030C8260C1 6:46ug/L LMM 1601366
1,2,4-trimethylbenzene 6/8/16< 2 2 SW5030C8260C1 6:46ug/L LMM 1601366
dibromofluoromethane SUR 6/8/16110 SW5030C8260C1 6:46% LMM78-114
Surrogate Recovery Limits
1601366
toluene-D8 SUR 6/8/16103 SW5030C8260C1 6:46% LMM88-110 1601366
4-bromofluorobenzene SUR 6/8/16105 SW5030C8260C1 6:46% LMM86-115 1601366
SPACE
3
4
ATTACHMENT C
CHARTS
®
9/1/2016
GeoInsight Project 5063-000: 5063May2016tables.xlsx:MW-1chrt Page 1 of 4
100
1,000
10,000
100,000
1,000,000
Co
nce
ntr
ati
on
-u
g/L
MW-1/1R
Benzene MTBE
May 2009
Remedial Excavation
Data-point markers at 500,000 ug/L indicate LNAPL was present during the monitoring event.
9/1/2016
GeoInsight Project 5063-000: 5063May2016tables.xlsx:MW-4Chrt Page 2 of 4
0
100
200
300
400
500
600
700
800
Co
nce
ntr
ati
on
-u
g/L
MW-4/4R
Benzene MTBE
Oct 2006
LNAPL Present
May 2009
Remedial Excavation
Hollow data-point markers indicate a non-detect value
equal to the reported laboratory practical quantitation limit.
9/1/2016
GeoInsight Project 5063-000: 5063May2016tables.xlsx:GES-2Chrt Page 3 of 4
1
10
100
1,000
10,000
100,000
Co
nce
ntr
ati
on
-u
g/L
GES-2/2R
Benzene MTBE
Apr 08 & Oct 08
LNAPL Present
May 2009
Remedial Excavation
Hollow data-point markers indicate a non-detect value equal
to the reported laboratory method detection limit.
9/1/2016
GeoInsight Project 5063-000: 5063May2016tables.xlsx:MW-3Chrt Page 4 of 4
0
1000
2000
3000
4000
5000
6000
7000
8000
9000
10000
Co
nce
ntr
ati
on
-u
g/L
MW-3/3R
Benzene MTBE
Data point plotted at 10,000 ug/L indicate
NAPL was present in well
LNAPL Present
May 2009
Remedial Excavation
ATTACHMENT D
WORK PLAN / COST ESTIMATE
®
