‘g~I’ - Vermont

GROUNDWATER MONITORING REPORTGEORGIA MARKET

962 ETHAN ALLEN HIGHWAYGEORGIA, VERMONT

Prepared for:

WoodnLadder Realty, LLC38 Windswept Drive

Coichester, VT 05446Contacts: Ray & Claudette Bouffard

VT SMS Site #2005-33 78

October 8, 2012

Brian R. MonroeEnvironmental Scientist I

Prepared by:

Affirmed by:

I ~ / ;,4 ‘g~I’Frank Getchell, PG

Principal

LEGGETTE, BRASHEARS & GRAHAM, INC.Professional Groundwater & Environmental Consulting Services

76 Pearl Street, Suite 203Essex Junction, VT 05452

(802) 288-9600

Groundwater Monitoring Report 10/8/2012

N:\Env. Projects\Georgia Market\Reports\0712_GWR.doc i

TABLE OF CONTENTS

X ....................... ..1 .0 ..........................2 .0 2

....................... ..3

...................... .3

...................... .3 4

4. 4 ...................... .5

0 ....5 6.0 FINDINGS & CONCLUS ......................................................................................5

RECOMMENDATIONS.....................................................................................................................5

ENCLOSURES

p

Attachment 1 Laboratory Report

E ECUTIVE SUMMARY ............................................................................................... .. ...

..

..

..3.2 GROUNDWATER SAMPLE COLLECTION ....................................................................... ...

..

1 INTRODUCTION & BACKGROUND ............................................................... ..

2 SCOPE OF WORK..............................................................................................................................

3.0 GROUNDWATER SAMPLING .......................................................................... .. .

3.1 GROUNDWATER ELEVATION AND FLOW DIRECTION .............................................. .. ...

4.0 ANALYTICAL RESULTS..................................................................................................................

1 GROUNDWATER RESULTS .......................................................................................................................4.2 QUALITY ASSURANCE / QUALITY CONTROL............................................................ .. ...

5. WELL REPAIR ...............................................................................................................................

IONS....................

7.0

Figures 1 Site Location Ma2 Site Plan


N:\Env. Projects\Georgia Market\Reports\0712_GWR.doc 1

EXECUTIVE SUMMARY

groundwater

rket on Ethan

Realty, LLC.

ination, which

underground storage tank (UST) system. Groundwater

contamination continues to exceed Vermont State standards in a single monitor well and

mo

e remaining on-Site groundwater

mo x and asphalt

tion has been

event show

-4 continues to exceed the Vermont Groundwater

Enf ncentration in

lts, but remains consistent with

concentrations reported in prior sampling events.

n the available

ination is limited to the vicinity of MW-4.

LBG recommends continuing groundwater monitoring of the on-Site well for

VOCs on biennial basis as previously suggested by the Vermont Site Management Section

(SMS). The next round of sampling of the remaining Site wells would then be scheduled

for July 2014.

Leggette, Brashears and Graham, Inc. (LBG) has prepared this

monitoring report, summarizing the July 2012 sampling event at Georgia Ma

Allen Highway in Georgia, Vermont (the Site), on behalf of WoodnLadder

Groundwater monitor wells were previously installed to monitor the contam

appears to be from the previous

nitoring has been ongoing since 2005.

A groundwater sample was collected from th

nitor well (MW-4) for laboratory analysis. Additionally, the road-bo

surrounding MW-4 were repaired directly after the sampling event.

Based on the previous monitoring events, groundwater flow direc

interpreted to be northeasterly. The results of the July 2012 sampling

groundwater contamination in well MW

orcement Standards (VGES). The volatile organic compound (VOC) co

MW-4 has increased compared to the October 2010 resu

It does not appear that there is impact to any other receptors based o

data, which indicates contam



1.0 INTRODUCTION & BACKGROUND

the July 2012

lty, LLC. The

ed on Figure 1, Site Location Map and details of the Site are

sho

store and deli

e the Georgia

ocery store) is

built in 1971. The Site is

loc ont. Adjacent

05, subsurface

pacted soil and

groundwater. Groundw ination,

tion continues

d monitoring has been ongoing since 2005.

The State of Ver ont Sites Management Section (SMS) presently requires

continued monitoring of the Site groundwater. Monitoring of the indoor air space of the

Site groundwater

mo x and asphalt

submitted to Eastern Analytical, Inc. of Concord,

New Hampshire for laboratory analysis by US EPA modified Method 8021B for VOCs.

Following the completion of the above mentioned field work and upon receipt of

the analytical data, LBG prepared this summary report, including tabulated summaries of

LBG has prepared this groundwater monitoring report, summarizing

sampling event at Georgia Market, the Site, on behalf of WoodnLadder Rea

location of the Site is depict

wn on Figure 2, the Site Plan.

The Site is occupied by Georgia Market, which includes a grocery

with retail petroleum (gasoline, diesel and kerosene) sales. Also on-Site ar

Post Office, a carwash, and game processing facility. The main building (gr

newly constructed in 2011, replacing the previous building

ated in a mixed commercial/agricultural/residential area of Georgia, Verm

properties include a campground, a farm, a kitchen shop and bicycle shop.

As recommended in a Phase I Environmental Site Assessment in 20

investigations were conducted, which led to the discovery of petroleum im

ater monitor wells were installed to monitor the contam

which appears to be from the previous UST system. Groundwater contamina

to exceed VGES in a single monitor well an

m

previous Post Office location had been discontinued.

2.0 SCOPE OF WORK

A groundwater sample was collected from the remaining on-

nitor well (MW-4) for laboratory analysis. Additionally, the road-bo

surrounding MW-4 were repaired directly after the sampling event.

The groundwater sample was



data; figures depicting groundwater flow direction and contaminant distribution; and

comparisons of historical data to the current data.

DWATER SAMPLING 3.1

ch mark (elevation set at 100 feet). Based on the previous data

collected, the groundwater flow direction is interpreted to be northeasterly. Figure 2

d s i n July

TABLE 1

3.0 GROUN

Groundwater Elevation and Flow Direction

The groundwater elevation measured during the July 2012 event was 91.43 feet,

referencing a temporary ben

shows groundwater flow direction.

The fo5, 2012

llowing table, Table 1, epicts measurement collected n the field o2

Well Identification

Top of Casing Elevation (feet)

Total Depth of Well (feet)

Depth to Product (feet)

Depth to Water (feet)

Product Thickness

(feet)

Corrected Depth to

Water (feet)

Water Table Elevation (feet)

MW-4 7.36 0.00 7.36 91.43 98.79 10.76 ND MW-6 OYED DESTRMW-7 ED DAMAGED & ABANDONMW-8 ABANDONED

Notes: 1. Values are referenced to a TBM at 100 feet, based on Verterre data.

oundwater Sample Collection

le collection,

-4, in order

to the ground

Sample glassware included 40 milliliter glass vials preserved with hydrochloric

acid. Duplicate (DUP) and trip blank samples were collected for Quality

purposes. The samples were delivered on ice to

Eastern Analytical, Inc. under chain-of-custody, for analysis of VOCs.

2. NL - not located; NM - not measured; ND - not detected. 3. Data recorded are referenced to the highest point of the well casing. 4. Depth to water and product measurements were obtained with a water level meter.

3.2 Gr

Following depth to water measurement and prior to samp

approximately three well volumes of groundwater were purged from well, MW

to obtain a representative groundwater sample. Purge water was discharged

surface.

Assurance/Quality Control (QA/QC)



4.0 ANALYTICAL RESULTS

4.1

tes petroleum

g the VGES in MW-4. The July 2012 results are summarized in

the following table, Table 2. TABLE

Groundwater Results

The laboratory data received from Eastern Analytical, Inc. indica

contamination exceedin

2

Sam

ple

Iden

tific

atio

n

Ben

zene

Tolu

ene

Ethy

lben

zene

Tota

l Xyl

enes

MTB

E

1,2,

4 Tr

imet

hylb

enze

ne

1,3,

5 Tr

imet

hylb

enze

ne

Nap

htha

lene

Tota

l Tar

get V

OC

s

MW-4 19 <5 170 528 <5 710 210 280 1,917 DUP 19 <5 170 527 <5 680 200 260 1,844

Trip Blank <1 <1 <1 <2 <5 <1 <1 <5 ND Concentration in ug/L

VGES 5 1,000 700 10,000 40 350* 20 NE Not cized values exceed the

4. DUP - duplicate sample collected from MW-4 for QA/QC; trip blank for QA/QC. 5. Concentration is reported in units of ug/L - micrograms per liter - unless noted otherwise. 6. * Combined VGES value of 350 ug/L is used. Graphical depiction of contaminant trends over time for MW-4 is shown below.

es: 1. VGES - Vermont Groundwater EVGES.

nforcement Standard; bold and itali

2. ND - not detected above method detection limits; NE - VGES not established. 3. MTBE - methyl-tertiary butyl ether.

MW-4

0Jun-05

Sep-05

Dec-05

Mar-06

Jun-06

Sep-06

Dec-06

Mar-07

Jun-S J S S

500

2,0002,500

07

Sep-07

Dec-07

Mar-08

Jun-08ep-08

Dec-08

Mar-09un-09

Sep-09

Dec-09

Mar-10

Jun-10ep-10

Dec-10

Mar-11

Jun-11ep-11

Dec-11

Mar-12

Jun-12

Date

Con

cent

r (u

g/L

1,0001,500

atio

n)

02468101214

DTW

(ft)

VOCs DTW Screen

2. Screen – top and bottom of well screen. The complete laboratory report is provided as Attachment 1, and VOC

concentrations are depicted on Figure 2.

Notes: 1. DTW – depth to water.



4.2 Quality Assurance / Quality Control

for the following parameters prior to

ntification;

• Analysis within the method specified

ptable detection limit

• Acceptable surrogate recoveries.

s) in the trip

The Relative Percent Difference (RPD) for total VOCs detected in MW-4 and its

duplicate (labeled DUP) was calculated at 4%, which is within the acceptable limits (0-

20%). The laborato its for all

samples.

On July 25, 2012, following sampling, LBG repaired the broken road box and lid

on MW-4. The asphalt in the imm diate area surrounding MW-4 was removed with a

jack road box and

tamped down new asphalt to keep the well flush with the parking lot.

LBG draws the following findings from the data collected during the July 2012

rical data.

Groundwater flow direction has been interpreted to be northeasterly.

Groundwater contamination exceeding the VGES for benzene and naphthalene was

All laboratory data has been validated

acceptance:

• Correct sample ide

• Correct reporting limits;

holding time;

• Acce

multipliers; and,

No VOCs were detected above the method detection limits (MDL

blank sample.

ry report shows surrogate recoveries within acceptance lim

Based on the QA/QC evaluation, the data is acceptable.

5.0 WELL REPAIR

e

hammer and the broken road box was removed. LBG installed a new

6.0 FINDINGS & CONCLUSIONS

monitoring event as well as from histo



detected in MW-4, which is located at the former gasoline UST location and

southeast of the current tank pad and pump island.

n beneath the

latively stable.

pact to any other receptors based on the available data,

which indicates contamination is limited to the vicinity of MW-4 and the location of the

former gasoline USTs.

onitoring of the on-Site well, MW-4,

for VOCs on biennial basis as suggested by the VT SMS. The next round of sampling of

the remaining Site well would then be scheduled for July 2014.

Based on the July 2012 monitoring event, groundwater contaminatio

Site exceeds the VGES. The VOC concentration in MW-4 has remained re

It does not appear that there is im

7.0 RECOMMENDATIONS

LBG recommends continuing groundwater m

FIGURES

LEGGETTE, BRASHEARS & GRAHAM, INC.

N

EW

S

SCALE: 1" = 1,000'

5001,000 2,0001,0000

SITE LOCATION MAP

FIGURE:CHECKED BY:

PREPARED BY:

GEORGIA, VERMONT

LEGGETTE, BRASHEARS & GRAHAM, INC.Professional Groundwater and Environmental Services

76 Pearl Street, Suite 203

Essex Junction, VT 05452

(802) 288-9600

FILE: DRAWN BY:Q:\Env Proj 2006\GM DID

L

GB

DATE: 11/16/061JRD

GEORGIA MARKET

962 ETHAN ALLEN HIGHWAY

SOURCE: United States Geological Survey 7.5 Minute Topographic

Map for the Milton, VT Quadrangle

COPYRIGHT (C) 2006, MAPTECH, INC. (978) 792-1000

SITE LOCATION

N

EW

S

SCALE: 1" = 1,000'

5001,000 2,0001,0000

SITE LOCATION MAP

FIGURE:CHECKED BY:

PREPARED BY:

GEORGIA, VERMONT




(802) 288-9600


L

GB

DATE: 11/16/061JRD

GEORGIA MARKET


SOURCE: United States Geological Survey 7.5 Minute Topographic

Map for the Milton, VT Quadrangle

COPYRIGHT (C) 2006, MAPTECH, INC. (978) 792-1000

SITE LOCATION

N

EW

S

LEGEND

GROUNDWATER MONITOR WELL LOCATION

SUPPLY WELL LOCATION

SOIL BORING LOCATION

SCALE: 1" = 40'

2040 80400

PID SCREENING LOCATION

SITE PLAN

FIGURE:CHECKED BY:

PREPARED BY:

GEORGIA, VERMONT




(802) 288-9600


L

GB

DATE: 10/19/062JRD

GEORGIA MARKET


REFERNCE: THIS PLAN IS BASED ON THE PLAN ENTITLED SITE PLAN, GEORGIA

MARKET, GEORGIA, VERMONT, DATED 03/17/06, PROJECT #05056, PREPAREDBY THE VERTERRE GROUP, INC.

395 (WITH VOC CONCENTRATION IN UNITS OF ug/L)

CLOSED GROUNDWATER MONITOR WELL

GROUNDWATER FLOW DIRECTION BASED ON

HISTORICAL DATA

W

S

E

N

( IN FEET )

1 inch = ft.

GRAPHIC SCALE

0

MW-1 = MONITOR WELL

(CASING ELEVATION IN FT)

LEGEND

CATCH BASIN

(APPROXIMATE LOCATION)

STORMWATER MANHOLED

GUARD RAIL

SITE PLAN

GEORGIA MARKET

FIGURE:CHECKED BY:

PREPARED BY:

GEORGIA, VERMONT




(802) 288-9600

FILE: DRAWN BY:Q:\ENV PROJ\Georgia

L

GB

DATE: 01/30/082JRD


NO. DATE DESCRIPTION BY DDR

FENCE

SITE LOCATION

( IN FEET )

1 inch = ft.

GRAPHIC SCALE

0

W

S

E

N

309.21'

MW-1 = MONITOR WELL WITH MEASURED FREE

PRODUCT

APPROXIMATE LOCATION OF FORMER TANK CAVITY

CROSS SECTION

REFERENCES:

1. THIS PLAN REFERENCES SITE PLAN PREPARED BY CROSS CONSULTING ENGINEERS, P.C. FOR WOODNLADDER

REALTY ENTITLED "STORE RENOVATION" DATED 11/10/10, DRAWING C-1 (PROJECT 10056).

2. THIS PLAN REFERENCES AN ELEVATION AND DISTANCE SURVEY CONDUSTED BY LBG

IN AUGUST 2005.

EW-3 = FORMER 4 INCH DIAMETER EXTRACTION WELL

500

1,000

1,000 2,0001,000

15

30

30 6030



395(WITH VOC CONCENTRATION IN UNITS OF ug/L)



HISTORICAL DATA

SB-4

N

EW

S

LEGEND




SCALE: 1" = 40'

2040 80400


SITE PLAN

FIGURE:CHECKED BY:

PREPARED BY:

GEORGIA, VERMONT




(802) 288-9600


L

GB

DATE: 10/19/062JRD

GEORGIA MARKET







HISTORICAL DATA

W

S

E

N

( IN FEET )

1 inch = ft.

GRAPHIC SCALE

0

MW-1 = MONITOR WELL


LEGEND

CATCH BASIN


STORMWATER MANHOLED

GUARD RAIL

SITE PLAN

GEORGIA MARKET

FIGURE:CHECKED BY:

PREPARED BY:

GEORGIA, VERMONT




(802) 288-9600


L

GB

DATE: 01/30/082JRD



FENCE

SITE LOCATION

( IN FEET )

1 inch = ft.

GRAPHIC SCALE

0

W

S

E

N

309.21'


PRODUCT


CROSS SECTION

REFERENCES:




IN AUGUST 2005.


500

1,000

1,000 2,0001,000

15

30

30 6030






HISTORICAL DATA

SB-4

N

EW

S

LEGEND




SCALE: 1" = 40'

2040 80400


SITE PLAN

FIGURE:CHECKED BY:

PREPARED BY:

GEORGIA, VERMONT




(802) 288-9600


L

GB

DATE: 10/19/062JRD

GEORGIA MARKET







HISTORICAL DATA

W

S

E

N

( IN FEET )

1 inch = ft.

GRAPHIC SCALE

0

MW-1 = MONITOR WELL


LEGEND

CATCH BASIN


STORMWATER MANHOLED

GUARD RAIL

SITE PLAN

GEORGIA MARKET

FIGURE:CHECKED BY:

PREPARED BY:

GEORGIA, VERMONT




(802) 288-9600


L

GB

DATE: 01/30/082JRD



FENCE

SITE LOCATION

( IN FEET )

1 inch = ft.

GRAPHIC SCALE

0

W

S

E

N

309.21'


PRODUCT


CROSS SECTION

REFERENCES:




IN AUGUST 2005.


500

1,000

1,000 2,0001,000

15

30

30 6030






HISTORICAL DATA

SB-4

N

EW

S

LEGEND




SCALE: 1" = 40'

2040 80400


SITE PLAN

FIGURE:CHECKED BY:

PREPARED BY:

GEORGIA, VERMONT




(802) 288-9600


L

GB

DATE: 10/19/062JRD

GEORGIA MARKET







HISTORICAL DATA

W

S

E

N

( IN FEET )

1 inch = ft.

GRAPHIC SCALE

0

MW-1 = MONITOR WELL


LEGEND

CATCH BASIN


STORMWATER MANHOLED

GUARD RAIL

SITE PLAN

GEORGIA MARKET

FIGURE:CHECKED BY:

PREPARED BY:

GEORGIA, VERMONT




(802) 288-9600


L

GB

DATE: 01/30/082JRD



FENCE

SITE LOCATION

( IN FEET )

1 inch = ft.

GRAPHIC SCALE

0

W

S

E

N

309.21'


PRODUCT


CROSS SECTION

REFERENCES:




IN AUGUST 2005.


500

1,000

1,000 2,0001,000

15

30

30 6030






HISTORICAL DATA

SB-4

MW-5

MW-4

MW-6

MW-3

MW-2

MW-1

MW-8

MW-7

SB-4

GEORGIA

MARKET

GARAGE

POST

OFFICE

CAR WASH

SupplyWell

APPROX

IMATE

LOCAT

ION

OF

SWALE

PUMP

ISLAND

ROUTE

7

KEROSENE TANK

PUMP

GRASS

GRASS

GRASS

ASPHALT

ASPHALT

CAMPGROUND

FENCE

RESIDENTIAL

BIKE SHOP

FARM

TANK

PAD

98.79

STONE

DRIVEWAY

498

MW-5

MW-4

MW-6

MW-3

MW-2

MW-1

MW-8

MW-7

SB-4

1,917

ATTACHMENT 1

LEGGETTE, BRASHEARS & GRAHAM, INC.

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‘g~I’ - Vermont