Initial Site Investigation Report Linton Residence Stowe, Vermont · 2014. 2. 11. · Management...

ROSS ENV IRONMENTAL ASSOC IATES , I NC .

Hyd r og eo l o g y , Wa t e r Qu a l i t y , G I S P l a n n i n g , R emed i a t i o n , R eg u l a t o r y

C omp l i a n c e & P e rm i t t i n g , E n v i r o nmen t a l S i t e A s s e s smen t s , P e t r o l e um

I n v e s t i g a t i o n s , a n d R ad on M i t i g a t i o n

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Initial Site Investigation Report

Linton Residence

115 Forest Lane

Stowe, Vermont

SMS Site #: 2013-4439

Site Coordinates: 44o 28’ 56.39” N 72

o 38’ 29.50’’ W

3 February 2014

Prepared For:

Chris Linton

P.O. Box 458

Media, Pennsylvania 19063

Prepared By:

Ross Environmental Associates, Inc.

P.O. Box 1533

Stowe, Vermont 05672

Phone: (802) 253-4280

Fax: (802) 253-4258

R.E.A. Project No. 33-199

R.E.A. Document #: 33199ISI

TABLE OF CONTENTS

Page

Executive Summary .................................................................................................................................. i

Site Profile .... .......................................................................................................................................... ii

1.0 Introduction ................................................................................................................................ 1

1.1 Site Location and Setting .................................................................................................... 1

1.2 Site History ......................................................................................................................... 2

1.3 Land Use and Adjacent Property Ownership ....................................................................... 2

2.0 Field Investigation Results and Procedures ........................................................................... 3

2.1 Contaminants of Concern .................................................................................................. 3

2.2 Source Area Evaluation ...................................................................................................... 3

2.3 Soil Boring and Monitoring Well Installation .................................................................... 3

2.4 Ground-Water Elevations and Flow Direction ................................................................... 5

2.5 Ground-Water Sampling and Analysis ............................................................................... 5

2.6 Investigation Procedures......................................................................................................... 6

3.0 Sensitive Receptor Identification and Risk Assessment ......................................................... 6

3.1 Receptor Identification ....................................................................................................... 6

3.2 Risk Assessment .................................................................................................................. 7

4.0 Data Evaluation and Conceptual Model.................................................................................... 7

5.0 Recommendations ...................................................................................................................... 8

6.0 Limitations .................................................................................................................................. 8

7.0 References ................................................................................................................................... 9

List of Appendices

Appendix A Figures and Tables

Appendix B Photographs

Appendix C Soil Boring/Monitoring Well Logs

Appendix D Laboratory Reports

EXECUTIVE SUMMARY

ISI Report – Linton Residence page i

Ross Environmental Associates, Inc. 33199ISI

Ross Environmental Associates, Inc. (R.E.A.) has conducted an initial site investigation (ISI) at the

Linton Residence, located at 115 Forest Lane in Stowe, Vermont. Field investigation included:

installation of four monitoring wells, sampling and analysis of groundwater from four on-site monitoring

wells, and a receptor survey to identify potential risks to the environment and human health.

Four monitoring wells (MW-1, MW-2, MW-3, and MW-4) were installed on the property to evaluate the

degree of subsurface contamination that was discovered in the vicinity of a 550-gallon fuel-oil

underground storage tank (UST), which was removed in October 2013. Available information indicates

that groundwater beneath the site has not been impacted by residual petroleum contamination. No

volatile petroleum compounds were detected in the groundwater samples collected from any of the onsite

monitoring wells. Based on available information, the extent of subsurface contamination has been

adequately determined and no downgradient sensitive receptors appear to be impacted or threatened.

No further investigation is recommended at this time and the site should be considered for Sites

Management Activities Completed (SMAC) status.

1. All of the monitoring wells should be abandoned in accordance with “Appendix G – Monitoring

Well Closure Guidance” of the VT DEC “Investigation and Remediation of Contaminated

Properties Procedure”.

2. Following the well abandonment and site restoration, R.E.A. will prepare a summary report and

formally request that the site be considered for SMAC status.

SITE PROFILE

ISI Report – Linton Residence page ii


Site Information

Site Name: Linton Residence

SMS Site #: 2013-4439

Site Address: 115 Forest Lane, Stowe, VT

Mailing Address: P.O. Box 458, Media, PA 19063

Telephone: (617) 680-2908

Contact/Owner: Mr. Christopher Linton

Coordinates: latitude 44° 28’ 56.39” N, and longitude 72° 38’ 29.50” W.

Contaminants of Concern: Petroleum compounds, characteristic of fuel oil.

Source: Former 550-gallon fuel oil UST.

Aquifer Characteristics

Soil Type: The soils at the site consisted of sand and silt.

Effective Porosity: 0.4

Hydraulic conductivity: 0.5 to 5.7 ft/day

Ground-water flow direction: southeast

Horizontal hydraulic gradient: 11.4 % (1/27/2014)

Average ground water velocity: 0.225 to 2.5 ft/day

Ground-water depth bgs: 3.56 to 4.93 feet bgs

Saturated thickness: Unknown

Depth to Bedrock: Unknown

Receptors

Drinking water: Drinking water for the site and surrounding properties is provided by private

drinking water system, Stowe Fire District 4 (WSID #5523).

Ground water: No volatile organic compounds were detected in samples collected from any of

the monitoring wells. (Table 2, Appendix A).

Surface water: The nearest surface water feature is un-named tributary to the Glen Brook

located approximately 400 feet downgradient and to the east of the former UST.

Buildings: The property is occupied by a private residence in a rural residential area. PID

readings on indoor air in the basement and first floor living area of the home

were all 0.0 ppmv.

Underground utilities: The residence utilizes a conventional septic system consisting of a septic tank

and leach field for wastewater disposal. The system is located south of the

residence.

ISI Report – Linton Residence page 1


1.0 INTRODUCTION

Following the discovery of petroleum contamination during the UST removal in October 2013, Mr.

Christopher Linton, retained the services of Ross Environmental Associates, Inc. (R.E.A.) to complete

an initial site investigation (ISI) at his property in Stowe, Vermont in accordance with Vermont

Department of Environmental Conservation (VT DEC) guidelines. The ISI was completed to address the

presence of petroleum contamination discovered in the former location of a 550-gallon fuel oil

underground storage tank (UST), which was removed in October 2013. This report has been prepared by

R.E.A. under the direction of Mr. Christopher Linton, unauthorized use or reproduction of this report is

prohibited without written authorization from R.E.A., or Mr. Christopher Linton.

1.1 Site Location and Setting

The Linton Residence is located at 115 Forest Lane in Stowe, Vermont (Figure 1, Appendix A). The

property is occupied by a private residence, located in a residential area of Stowe. Drinking water

for the site and surrounding properties is provided by public drinking water system, Stowe Fire

District #4 (WSID# 5523). The property is located within Zone 2 of the Source Protection Area

(SPA) for the Stowe Fire District #4 water system. Based on review of the VT Agency of Natural

Resources (ANR) Private Well GIS database, there are four private wells and two public wells

located within a 1,000-foot radius of the Linton property. Wastewater disposal for the property is

provided by an onsite septic system consisting of a tank and leachfield located south of the residence.

The ground surface in the general vicinity of the Site slopes southward with an average elevation of

approximately 1,023 meters above mean sea level (Google Earth, 2014). An un-named tributary to

the Glen Brook is located approximately 400 feet downgradient to the east of the former UST. The

geographic coordinates of the site are: latitude 44° 28’ 56.39” N, and longitude 72° 38’ 29.50” W.

The surficial geology in the vicinity of the site is mapped as a glaciolacustrine deposits consisting of

littoral sediments composed predominately of well sorted sand (Stewart and MacClintock, 1970).

Bedrock at the site is mapped as Amphibolite, which is a dark green hornblende-rich biotite-

plagioclase (Radcliffe, 2011). No bedrock outcrops were observed on the site or adjacent properties,

and bedrock was not encountered during soil boring activities.

An orthophotograph showing the site and sensitive receptors is included as Figure 2 (Appendix A)

and photographs of the site and surrounding area taken during the initial site investigation are

included in Appendix B.



1.2 Site History

On 10 October 2013, Ross Environmental Associates (R.E.A.) provided oversight for the closure of

one 550-gallon fuel oil underground storage tank (UST) located at 115 Forest Lane in Stowe,

Vermont. Excavation of the UST was provided by T & C Excavating of West Danville, Vermont.

The age of the tank was unknown. At the time of removal the tank was discovered to be in poor

condition, with significant rust and pitting; however, no observable holes or weeps were identified.

Soils in the excavation consisted of fine to medium brown sand with some gravel from ground

surface to the bottom of the excavation at approximately seven feet below ground surface (bgs).

Soils in the excavation were screened with an Ion Science Tiger photo-ionization detector (PID).

PID readings on soils from the excavation ranged from 0.0 to 296 parts per million-volume (ppmv),

which are above the VT DEC action level of 10 ppmv for fuel oil/diesel contaminated soils. The

limits of soil and groundwater contamination could not be defined during the UST closure; therefore,

the VT DEC requested additional work, in the response letter dated 14 November 2013, to identify

possible impacts to the groundwater, soil, and indoor air in the vicinity of the former UST.

At the request of the VT DEC, R.E.A developed a work plan and cost estimate to investigate the

possible extent of contamination and impacts to sensitive receptors in the vicinity of the former UST.

In December 2013, the VT DEC approved the work plan and costs associated with the initial site

investigation (ISI).

1.3 Land Use and Adjacent Property Ownership

The subject property is located at 115 Forest Lane in Stowe, Vermont. Forest Lane abuts the

property to the west and the surrounding properties to the north, south, and east are occupied by

private residences and woodlands. The property is located within Zone 2 of the Source Protection

Area (SPA) for the Stowe Fire District #4 water system. An aerial photograph showing adjacent

property site features is included as Figure 2 in Appendix A.



2.0 Field Investigation Results and Procedures

R.E.A.’s field investigation included: the installation of four soil boring/monitoring wells (MW-1,

MW-2, MW-3, and MW-4); field screening of subsurface soil samples for the possible presence of

volatile organic compounds (VOCs) using a portable PID; collection and analysis of groundwater

samples from four on-site monitoring wells, and a receptor survey to identify potential risks to the

environment and human health. Approximate monitoring well/soil boring locations and significant

site features are shown on Figure 3 (Appendix A).

The objectives of this initial site investigation were to:

� Evaluate the degree and extent of petroleum contamination in soils and ground water;

� Qualitatively assess the risks to environmental and public health via relevant sensitive receptors

and potential contaminant migration pathways.

� Identify the need for further site characterization, appropriate monitoring, and/or remedial

actions based on the site conditions.

2.1 Contaminants of Concern

Based on available information, the contaminant of concern (COC) at the Linton Residence is No. 2

fuel oil. A summary of various regulatory standards and chemical properties for petroleum

compounds typically associated with No. 2 fuel oil is included on Table 1, Appendix A.

2.2 Source Area Evaluation

Based on the review of the UST closure report and information collected during the Initial Site

Investigation, the presence of the subsurface petroleum contamination discovered on-site is related to

the former UST, which was removed in October 2013. No other upgradient sources of petroleum

contamination were identified during the Initial Site Investigation. Removal of the UST has

eliminated the source of petroleum contamination and has reduced the threat to nearby sensitive

receptors.

2.3 Soil Boring and Monitoring Well Installation

On 15 January 2014, R.E.A. provided oversight during the installation of four monitoring wells

(MW-1, MW-2, MW-3, and MW-4). MW-1 was installed approximately 30 feet downgradient from

the former UST, on the northeast side of the house. MW-2 was installed downgradient of the former

UST location approximately three feet off the southeast corner of the house. MW-3 was installed



approximately 30 feet to the north of the former UST and MW-4 was installed in the former UST

grave. The approximate monitoring well/soil boring locations are shown on Figure 3, Appendix A.

Subsurface soils at the site consisted primarily of brown sand with silt and trace amounts of clay.

Groundwater was encountered between eight to ten feet below ground surface (bgs) at the time of

drilling. The soil borings for MW-1, MW-3 and MW-4 were advanced to approximately 16 feet bgs

and the MW-2 soil boring was completed to approximately 12 feet bgs.

PID readings on the soil samples collected from the soil borings were all 0.0 ppmv, except for one

reading of 0.2 ppmv collected from the MW-4 soil boring. All the PID readings were below the VT

DEC action level of 10 ppmv for fuel-oil contaminated soil. PID screening results are included on

the soil boring logs in Appendix C.

Monitoring wells were installed at each location to intercept the water table. Each monitoring well

was constructed using 1.0-inch-diameter schedule 40 polyvinyl chloride (PVC) with flush threaded

joints and 0.01-inch factory-slotted well screens. All of the monitoring wells were completed with

ten-foot well screens, except for MW-2 which was completed with a five-foot well screen. Solid

PVC risers, extending to ground surface, were used to complete each well. A clean sand pack was

placed around the screened section of each monitoring well extending one to two feet above the top

of the screen, with a bentonite seal placed above the sand pack. Flush-mounted road-box protective

casings were installed over each monitoring well. Each well was developed after installation by

removing eight to ten standing volumes of water using a peristaltic pump. Soil descriptions and

monitoring well construction details are included on the soil boring logs in Appendix C.

Environmental Products and Services of Williston, Vermont installed the soil borings and monitoring

wells with a direct push Geoprobe Drill rig under direct supervision of R.E.A. field personnel.

R.E.A.’s Field Technician screened soil samples from the soil borings for the possible presence of

volatile organic compounds (VOCs) using an Ion Science Tiger PID. The PID was calibrated with an

isobutylene standard gas to a benzene reference on the day of drilling.

After installation of the soil boring/monitoring wells, R.E.A. surveyed the locations of the

boring/wells in relation to existing site features. Each boring/well was located in azimuth to an

accuracy of ± 1.0 feet, and in elevation with an accuracy of ± 0.01 feet relative to an on-site

benchmark of 100.00 feet.



2.4 Ground Water Elevations and Flow Direction

On 27 January 2014, ground-water flow in the unconfined surficial aquifer at the site was toward the

south-southwest with an estimated hydraulic gradient of approximately 11 percent (MW-1 to MW-4).

Water-level measurements and elevation calculations for 27 January 2014, are presented in Table 2

and the ground-water contour map prepared using this data is presented as Figure 4, Appendix A.

Static water-table elevations were computed for each monitoring well by subtracting measured depth-

to-water readings from the surveyed top-of-casing (TOC) elevations, which are relative to an

arbitrary site datum of 100.00 feet.

2.5 Ground Water Sampling and Analysis

Based on available information, groundwater in the immediate vicinity of the former UST system has

not been impacted by petroleum contamination. At this time, the extent of subsurface petroleum

contamination has been adequately defined and no off-site sensitive receptors have been impacted or

appear to be threatened by residual petroleum contamination.

No volatile petroleum compounds were detected in the groundwater samples collected from the four

on-site monitoring wells. No petroleum compounds were detected in the trip-blank sample, and the

duplicate sample results (MW-4) were within the acceptable EPA limit. The analytical results are

summarized on Table 3 (Appendix A), and copies of the laboratory analytical reports are included as

Appendix D. Contaminant distribution, based on samples collected on 27 January 2014, is shown on

Figure 5 in Appendix A.

Prior to sample collection, R.E.A field personnel measured the water level in each monitoring well

and purged approximately three to five standing volumes of water from each well using a peristaltic

pump. All of the groundwater samples were collected using dedicated polyethylene tubing.

Groundwater was pumped directly into 40-milliliter glass vials with teflon-lined septum lids. Each

sample vial was preserved with hydrochloric acid to reduce the pH to less than 2 standard units.

Immediately after sample collection, field measurements were obtained for pH, specific conductivity,

temperature, total dissolved solids (TDS), and oxygen reduction potential (ORP). A summary of the

field measurement data is included on Table 4, in Appendix A.

On 27 January 2014, groundwater samples were collected from four on-site monitoring wells (MW-

1, MW-2, MW-3, and MW-4). Groundwater samples from the monitoring wells were analyzed for

the possible presence of volatile organic compounds (VOCs) in accordance with U.S. EPA Method



8260. All samples were transported under chain-of-custody in an ice-filled cooler to AMRO

Environmental Laboratories of Merrimack, New Hampshire for laboratory analysis.

2.6 Investigation Procedures

The procedures used during the initial site investigation at the Linton Residence are consistent with

the following guidance documents:

� “Underground Storage Tank Closure and Site Assessment Requirements.” Vermont Agency

of Natural Resources, Waste Management Division. June 2010.

� “Investigation and Remediation of Contaminated Properties Procedure.” Vermont Agency

of Natural Resources, Waste Management Division. April 2012.

� ASTM D 2488-93. “Standard Practice for Description and Identification of Soils (Visual-

Manual Procedure).” American Society for Testing and Materials.

� ASTM D 5092-90. “Standard Practice for Design and Installation of Ground Water

Monitoring Wells in Aquifers.” American Society for Testing and Materials.

� ASTM D 4750-87. “Standard Test Method for Determining Subsurface Liquid Levels in a

Borehole or Monitoring Well.” American Society for Testing and Materials.

� ASTM D 4448-85a. “Standard Guide for Sampling Ground Water Monitoring Wells.”

American Society for Testing and Materials.

3.0 SENSITIVE RECEPTOR IDENTIFICATION AND RISK ASSESSMENT

Based on available information, the underlying groundwater formation has not been impacted by the use

of the former UST. No significant subsurface petroleum contamination was identified during soil boring

at the site and laboratory analysis of a groundwater samples collected from the on-site monitoring wells

did not detect the presence of VOCs. The approximate locations of nearby sensitive receptors are shown

on Figure 2, Appendix A.

3.1 Receptor Identification

The following sensitive receptors were identified in the vicinity of the subject property.

� Soils and groundwater in the vicinity of the former UST.

� Indoor air within the basement of the on-site building.

� Zone 2 of the Source Protection Area for the Stowe Fire District #4 water system (WSID#

5523).

� Private and public drinking water wells located within the vicinity of the former UST.



� A small un-named tributary to the Glen Brook located approximately 400 feet downgradient

and to the east of the former UST.

3.2 Risk Assessment

On the basis of the information obtained during this investigation, R.E.A. has qualitatively assessed

the risks that the subsurface contamination poses to human health and the environment. The findings

are summarized as follows:

� Based on available information, groundwater beneath the site has not been impacted by

residual petroleum contamination or the past operation of the former UST system. No

petroleum contamination was detected in the groundwater samples collected from the on-site

monitoring wells on 27 January 2014.

� Indoor air in the basement of the house has not been impacted by any residual contamination

associated with the use of the former UST; PID readings of ambient indoor air within the

basement of the residence were all 0.0 ppm when screened on 10 October 2013 and 15

January 2014. The floor wall seam of the basement foundation were observed to be well

sealed and no preferential pathways were noted.

� Zone 2 of the Source Protection Area for the Stowe Fire District #4 water system is not

threatened or likely to be impacted by the use of the former UST located on the Linton

property. No petroleum contamination was detected in the groundwater samples collected

from the on-site monitoring wells on 27 January 2014.

� Based on available information, nearby drinking water wells are not threatened or likely to

be impacted by the use of the former UST located on the Linton property. No petroleum

contamination was detected in the groundwater samples collected from the on-site

monitoring wells on 27 January 2014.

� Based on the findings of the Initial Site Investigation, the tributary to the Glenn Brook is not

threatened by the residual petroleum contamination.

4.0 DATA EVALUATION AND CONCEPTUAL MODEL

Information collected during the Initial Site Investigation indicates that petroleum contamination

discovered during the October 2013 UST closure has not impacted the underlying groundwater

formation. The extent of subsurface contamination has been adequately determined, and no

downgradient or off-site sensitive receptors have been impacted at this time.



Generally, the VT DEC requires active remediation when greater than 1/8” of free-product is present, or

when human health or a sensitive receptor is impacted or threatened by contamination. Based on

available information, the VT DEC is not likely to require any further investigation or active remediation

at Linton property.

A summary of the significant findings of the ISI is outlined below:

� No volatile petroleum compounds were detected in groundwater samples collected from the

four onsite monitoring wells.

� PID readings collected in the basement of the residence were all 0.0 ppmv.

� Subsurface soils at the site consisted brown sand with silt and varying amounts of clay.

� PID readings on soil samples collected from the soil borings were all 0.0 ppmv, except for

one reading of 0.2 ppmv collected from the MW-4 soil boring.

� Ground-water flow in the unconfined surficial aquifer at the site was toward the southwest in

the direction of the Glenn Brook.

5.0 RECOMMENDATIONS

On the basis of the results of this investigation and the conclusions stated above, no further investigation

is recommended at this time and the site should be considered for Sites Management Activities

Completed (SMAC) status. R.E.A. makes the following recommendations.

1. All of the monitoring wells should be abandoned in accordance with “Appendix G – Monitoring

Well Closure Guidance” of the VT DEC “Investigation and Remediation of Contaminated

Properties Procedure”.

2. Following the well abandonment and site restoration, R.E.A. will prepare a summary report and

formally request that the site be considered for SMAC status.

6.0 LIMITATIONS

This report was completed by Ross Environmental Associates, Inc. (R.E.A.) for the sole use of Mr.

Christopher Linton in connection with an assessment of on-site environmental conditions. Use of this

report by any other person or for any other use is not authorized except with prior written consent of

R.E.A. or Mr. Linton.

The work was undertaken to assess environmental conditions specifically on the subject property in

accordance with generally accepted engineering and hydrogeological practices. No other warranty,



express or implied, is made. Absolute assurance that any and all possible contamination at the site was

identified cannot be provided.

The report conclusions are based, in part, on information provided by the client, their agents, or third

parties, including state or local officials. R.E.A. assumes no responsibility for the accuracy and

completeness of the information. Where visual observations are included in the report, they represent

conditions at the time of the inspection, and may not be indicative of past or future site conditions.

7.0 REFERENCES

Radcliffe, N.M et al. 2011. “Bedrock Geologic Map of Vermont”. U.S. Geological Survey Scientific

Investigations Map 3184, 3 sheets, scale 1:100,000.

Freeze. R. A., and Cherry, J.A., 1976. Groundwater, Prentice-Hall, Inc., Englewood Cliffs, New Jersey,

29 p.

Fetter, C.W., 1994. Applied Hydrogeology, 3rd Ed., Prentice Hall, Englewood Cliffs, New Jersey, 98 p.

Google Earth, 2007.

Stewart, D.P. and MacClintock, P., 1970. “Surficial Geologic Map of Vermont”, Office of the State

Geologist.

FIGURES AND TABLES

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WOR CESTE R L

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BRO

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GULCH RD

ELMORE MOUNTAIN RD

BENNETT LN

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Figure 1USGS Map

115 Forest LaneStowe, Vermont

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Imagery: 2009 NAIP

Figure 2Orthophoto & Sensitive Receptors

115 Forest LaneStowe, Vermont

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residential Industrial

MtBE 1634-04-4 --- 40 -- 43,000 220,000 0.7404 2.89 1.20 51 g/L @ 25 oC

Benzene 71-43-2 5.0 5.0 1.2 1,100 5,400 0.8789 1.69 2.13 1,820 @ 22 oC

Toluene 108-88-3 1,000 1,000 6,800 5,000 46,000 0.8669 2.06 2.65 519.5 @ 25 oC

Ethylbenzene 100-41-4 700 700 3,100 5,400 27,000 0.8670 2.22 3.13 187 @ 25 oC

Total Xylenes 95-47-6 10,000 10,000 -- 630,000 2,700,000 0.8802 2.11 3.13 152 @ 20 oC

1,3,5-trimethylbenzene 526-73-8 -- -- 780,000 10,000,000 0.8944 2.80 3.55 75.2 mg/kg @ 25oC

1,2,4-trimethylbenzene 95-63-6 -- -- 62,000 260,000 0.8758 3.57 3.65 51.9 mg/kg @ 25 oC

Naphthalene 91-20-3 -- 20 -- 3,600 18,000 1.145 2.74 3.40 31.7 @ 25oC

n-propylbenzene 103-65-1 -- -- -- -- -- 0.8620 2.87 3.57 60.24 @ 25 oC

isopropylbenzene 98-82-8 -- -- -- -- -- 0.8618 3.45 3.63 48.3 mg/kg @ 25 oC

4-isopropyltoluene 99-87-6 -- -- -- -- -- 0.86 -- -- Insoluble @ 25 oC

Montgomery, J.H., 2000. "Groundwater Chemicals - Desk Refrence" Third Edition. Lewis Publishers, Boca Raton, Florida.

VT DEC SSVs. Vermont Department of Environmental Conservation Soil Screening Values (IROCP, 2012)

EPA MCL. U.S. Environmental Protection Agency - Maximum Contaminant Level. In micrograms per liter (ug/L).

Vermont Groundwater Enforcement Standards (VGESs). In micrograms per liter (ug/L).

Vermont Water Quality Criteria (WQC) for the protection of human health in Class B waters. In micrograms per liter (ug/L).

Soil sorption coefficient, log Koc

Octanol/water partition coefficient, log Kow

350

water solubility (mg/L)VT DEC SSVs (ug/L) SoilWQC

(ug/L)

density (g/cm3)

@ 20/4 oC

log Koc log KowCASNParameterEPA MCL

(ug/L)

VGES

(ug/L)

Stowe, Vermont

Linton Residence

Contaminants of Concern

TABLE 1

R.E.A. 33199 COC

TABLE 2

GROUND WATER ELEVATION CALCULATIONS

Well I.D.Top of Casing

Elevation (ft)

Depth to

Water (ft)

Water Table

Elevation (ft)

MW-1 102.45 9.35 93.10

MW-2 96.08 4.63 91.45

MW-3 101.92 8.75 93.17

MW-4 102.68 6.78 95.90

All values reported in feet relative to arbitrary site datum of 100.00 feet

Forest Lane

Stowe, Vermont

Monitoring Date: 27 January 2014

R.E.A. 33199gwe

Sample ID MTBE Benzene TolueneEthyl

benzene

Total

Xylenes

1,3,5

TMB

1,2,4

TMB

Naphtha-

lene

Total

BTEX

MW-1 ND<2.0 ND<1.0 ND<2.0 ND<2.0 ND<2.0 ND<2.0 ND<2.0 ND<5.0 ND




VGES 40 5.0 1,000 700 10,000 20 --


Dup (MW-4) ND<2.0 ND<1.0 ND<2.0 ND<2.0 ND<2.0 ND<2.0 ND<2.0 ND<5.0 ND

% Difference --- --- --- --- --- --- --- --- ---

Trip Blank ND<1.0 ND<1.0 ND<1.0 ND<1.0 ND<2.0 ND<1.0 ND<1.0 ND<2.0 ND

VGES 40 5.0 1,000 700 10,000 20 --

Notes:

Shaded values exceed the VGES = Vermont Ground Water Enforcement Standards

All concentrations reported in ug/L unless otherwise indicated.

ND = Not detected above laboratory detection limits

VDWS = Vermont Drinking Water Standard

* = Vermont Health Advisory (VHA)

* = Additional petroleum related VOCs detected, see laboratory analysis results

Drinking water sampling results were collected on 27 November 2013

350 (combined)

QA/QC Samples

350 (combined)


GROUND-WATER ANALYTICAL RESULTS

Forest Lane

Stowe, Vermont

TABLE 3

R.E.A. 33199BTX.

Well ID pH (su)temperature

(oC)

Specific

conductivity

(uS)

ORP (mV) DO TDS Comments

MW-1 5.13 8.71 239 -236.9 1.43 0.227very silty, poor recharge, no odor,

no sheen

MW-2very silty, poor recharge, no odor,

no sheen


no sheen


no sheen

pH reported in standard units (s.u.).

Specific conductivity reported in microsiemens (uS) or millisiemens (mS).

Oxidation-reduction potential (ORP) reported in millivolts (mV).

Total dissolved solids (TDS) reported in parts per million (ppm) or parts per (ppt) thousand.

PID = photoionization detector, reported in parts per million per volume (ppmv)

Not Enough Water


TABLE 4

FIELD MEASUREMENT DATA

Forest Lane

Stowe, Vermont

R.E.A. 33199ph

SITE PHOTOGRAPHS

AA

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II

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Forest Lane – ISI 15 January 2014

Stowe, VT Project # 33-199

Photo 1: Overview of site (Linton Residence) – View towards Southeast.

Photo 3: View of garage area and location of MW-1 – View toward Northwest.

Photo 5: View of installation of MW-3 – View toward Southeast.

Photo 2: Location of monitoring wells MW-1 and MW-2 – View toward West.

Photo 4: Installation of MW-2 and property boundary – View toward West.

Photo 6: Location of former 550-gallon UST. View of installation of MW-4 – View toward Southeast.

MW-2 MW-1

MW-1

SOIL BORING

MONITORING WELL LOGS

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Site Name:

Site Location:

Well Depth: 14.0' Boring Depth: 16.0' Installation Date:

8.0' Job Number:

Screen Diameter: 1" Depth: 4.5-14.0' REA Representative:

Screen Type/Size: Drilling Company:

Riser Diameter: 1" Depth: 0.0-4.5' Sampling Method:

Riser Type/Size: Reference Point (RP):

Depth (ft)Sample Depth

(ft)Recovery (%) PID (ppm) Well Profile Legend

0-4' 75 0.0

5

4-8' 100 0.0

10

8-12' 100 0.0

15

12-16' 100 0.0

20

25

AND 33-50% LITTLE 10-20% <2 VERY SOFT 8-15 STIFF 0-4 VERY LOOSE 30-50 DENSE

SOME 20-33% TRACE 0-10% 2-4 SOFT 15-30 VERY STIFF 4-10 LOOSE>50 VERY

DENSE

4-8 MEDIUM STIFF >30 HARD 10-30 MEDIUM DENSE

Ion Science Tiger

BLOW COUNT (COHESIVE SOILS) BLOW COUNT (GRANULAR SOILS)

SILT and CLAY, tightly packed

Soil Boring Terminated at 16' bgs. Well Set

Water Level

PROPORTIONS USED NOTES:

fine brown SAND some Gravel.

Concrete

Native Material

Bentonite

SILT and CLAY

fine brown SAND little Silt.

Filter Sand

Riser

Screen

Depth to Water (during drilling):

EP&S

BORING / WELL IDENTIFICATION: MW-1

Forest Lane

Stowe, Vermont

15-Jan-14

33-199

0.01' slotted schedule 40 PVC

Jim Rose

Schedule 40 PVC

Geoprobe

Sample Description / Notes

ROSS ENVIRONMENTAL ASSOCIATES

PHONE: (802) 253-4280 FAX: (802) 253-4258

P.O. Box 1533

Stowe, VT 05672

Site Name:

Site Location:


8.0' Job Number:







0-4' 75 0.0

5

4-8' 100 0.0

10

8-12' 100 0.0

15

12-16' 100

20

25



DENSE


15-Jan-14

33-199



Forest Lane

Stowe, Vermont

Jim Rose



EP&S

Schedule 40 PVC


Geoprobe


Concrete

Native Material

Bentonite

Filter Sand

fine brown SAND little Silt.

Riser

Screen

Water Level

Ion Science Tiger

BLOW COUNT (COHESIVE SOILS) BLOW COUNT (GRANULAR SOILS)PROPORTIONS USED NOTES:


PHONE: (802) 253-4280 FAX: (802) 253-4258

P.O. Box 1533

Stowe, VT 05672

Site Name:

Site Location:


10.0' Job Number:







0.0

0-4' 100

5 0.0

4-8' 100 0.0

10

8-12' 100 0.0

15

12-16' 100 0.0

20

25



DENSE


Ion Science Tiger


Riser

Screen

Water Level

Concrete

Native Material

Bentonite

Filter Sand



fine brown SAND and SILT.

SILT and trace Clay.

SILT and trace Clay.


Schedule 40 PVC


Geoprobe

Jim Rose


EP&S


Forest Lane

Stowe, Vermont

15-Jan-14

33-199


PHONE: (802) 253-4280 FAX: (802) 253-4258

P.O. Box 1533

Stowe, VT 05672

Site Name:

Site Location:


10.0' Job Number:







0.0

0-4' 100 0.2

5

4-8' 100 0.0

10

15

20 16-20'

25



DENSE


Ion Science Tiger



Concrete

Native Material

Bentonite

Filter Sand

Riser

Screen

Water Level

Schedule 40 PVC


Geoprobe

Jim Rose


EP&S


Forest Lane

Stowe, Vermont

15-Jan-14

33-199

fine brown SAND and GRAVEL.

fine brown SAND.

fine brown SAND and SILT


fine brown SAND and SILT


PHONE: (802) 253-4280 FAX: (802) 253-4258

P.O. Box 1533

Stowe, VT 05672

LABORATORY

ANALYTICAL REPORTS

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30-Jan-14Date:AMRO Environmental Laboratories Corp.

Project: 33199 Forest Lane

CLIENT: Ross Environmental Associates

Lab Order: 1401050Work Order Sample Summary

Date Received: 1/29/2014

Lab Sample ID Client Sample ID Collection Date Collection Time

1401050-01A MW1 1/27/2014 10:30 AM

1401050-02A MW2 1/27/2014 10:00 AM

1401050-03A MW3 1/27/2014 11:00 AM

1401050-04A MW4 1/27/2014 12:00 PM

1401050-05A Dup 1/27/2014 12:00 AM

1401050-06A TB 1/27/2014 8:00 AM

1

PDF created with FinePrint pdfFactory trial version http://www.pdffactory.com

DATA COMMENT PAGE

Organic Data Qualifiers

ND Indicates compound was analyzed for, but not detected at or above the reporting limit.

J Indicates an estimated value. This flag is used either when estimating a concentration for tentatively

identified compounds where a 1:1 response is assumed, or when the data indicates the presence of a

compound that meets the identification criteria but the result is less than the sample quantitation limit but

greater than the method detection limit.

H Method prescribed holding time exceeded.

E This flag identifies compounds whose concentrations exceed the calibration range of the instrument for that

specific analysis.

B This flag is used when the analyte is found in the associated blank as well as in the sample.

R RPD outside accepted recovery limits

RL Reporting limit; defined as the lowest concentration the laboratory can accurately quantitate.

S Spike Recovery outside accepted recovery limits.

# See Case Narrative

Q RPD between signal 1 and signal 2 >40%.

Micro Data Qualifiers

TNTC Too numerous to count

Inorganic Data Qualifiers

ND or U Indicates element was analyzed for, but not detected at or above the reporting limit.

J Indicates a value greater than or equal to the method detection limit, but less than the quantitation limit.

H Indicates analytical holding time exceedance.

B Indicates that the analyte is found in the associated blank, as well as in the sample.

MSA Indicates value determined by the Method of Standard Addition

+ Indicates the correlation coefficient for the Method of Standard Addition is less than 0.995

E This flag identifies compounds whose concentrations exceed the calibration range of the instrument for that

specific analysis.

R RPD outside accepted recovery limits

RL Reporting limit; defined as the lowest concentration the laboratory can accurately quantitate.

S Spike Recovery outside accepted recovery limits.

PS The analyte was below the Reporting Limit but has significant matrix interference as noted by the poor

recovery of the Post Digestion Spike.

# See Case Narrative

* MCL Exceeded

Report Comments:

1. Soil, sediment and sludge sample results are reported on a "dry weight" basis.

2. Reporting limits are adjusted for sample size used, dilutions and moisture content, if applicable.



Client Sample ID: MW1

Collection Date: 1/27/2014 10:30:00 AM

Matrix: GROUNDWATER

Analyses Result Qual Units Date AnalyzedRL


Lab Order: 1401050

Lab ID: 1401050-01A

DF

AMRO Environmental Laboratories Corp. Date: 30-Jan-14

EPA 8260C VOLATILES BY GC/MS SW8260C Analyst: SK

Dichlorodifluoromethane 1/29/2014 2:54:00 PM5.0 µg/L 1ND

Chloromethane 1/29/2014 2:54:00 PM5.0 µg/L 1ND

Vinyl chloride 1/29/2014 2:54:00 PM2.0 µg/L 1ND

Chloroethane 1/29/2014 2:54:00 PM5.0 µg/L 1ND

Bromomethane 1/29/2014 2:54:00 PM2.0 µg/L 1ND

Trichlorofluoromethane 1/29/2014 2:54:00 PM2.0 µg/L 1ND

Diethyl ether 1/29/2014 2:54:00 PM5.0 µg/L 1ND

Acetone 1/29/2014 2:54:00 PM10 µg/L 1ND

1,1-Dichloroethene 1/29/2014 2:54:00 PM1.0 µg/L 1ND

Carbon disulfide 1/29/2014 2:54:00 PM2.0 µg/L 1ND

Methylene chloride 1/29/2014 2:54:00 PM5.0 µg/L 1ND

Methyl tert-butyl ether 1/29/2014 2:54:00 PM2.0 µg/L 1ND

trans-1,2-Dichloroethene 1/29/2014 2:54:00 PM2.0 µg/L 1ND

1,1-Dichloroethane 1/29/2014 2:54:00 PM2.0 µg/L 1ND

2-Butanone 1/29/2014 2:54:00 PM10 µg/L 1ND

2,2-Dichloropropane 1/29/2014 2:54:00 PM2.0 µg/L 1ND

cis-1,2-Dichloroethene 1/29/2014 2:54:00 PM2.0 µg/L 1ND

Chloroform 1/29/2014 2:54:00 PM2.0 µg/L 1ND

Tetrahydrofuran 1/29/2014 2:54:00 PM10 µg/L 1ND

Bromochloromethane 1/29/2014 2:54:00 PM2.0 µg/L 1ND

1,1,1-Trichloroethane 1/29/2014 2:54:00 PM2.0 µg/L 1ND

1,1-Dichloropropene 1/29/2014 2:54:00 PM2.0 µg/L 1ND

Carbon tetrachloride 1/29/2014 2:54:00 PM2.0 µg/L 1ND


Benzene 1/29/2014 2:54:00 PM1.0 µg/L 1ND

Trichloroethene 1/29/2014 2:54:00 PM2.0 µg/L 1ND


Bromodichloromethane 1/29/2014 2:54:00 PM2.0 µg/L 1ND

Dibromomethane 1/29/2014 2:54:00 PM2.0 µg/L 1ND

4-Methyl-2-pentanone 1/29/2014 2:54:00 PM10 µg/L 1ND

cis-1,3-Dichloropropene 1/29/2014 2:54:00 PM1.0 µg/L 1ND

Toluene 1/29/2014 2:54:00 PM2.0 µg/L 1ND

trans-1,3-Dichloropropene 1/29/2014 2:54:00 PM1.0 µg/L 1ND


1,2-Dibromoethane 1/29/2014 2:54:00 PM2.0 µg/L 1ND

2-Hexanone 1/29/2014 2:54:00 PM10 µg/L 1ND


Tetrachloroethene 1/29/2014 2:54:00 PM2.0 µg/L 1ND

Dibromochloromethane 1/29/2014 2:54:00 PM2.0 µg/L 1ND





Matrix: GROUNDWATER



Lab Order: 1401050

Lab ID: 1401050-01A

DF


Chlorobenzene 1/29/2014 2:54:00 PM2.0 µg/L 1ND

1,1,1,2-Tetrachloroethane 1/29/2014 2:54:00 PM2.0 µg/L 1ND

Ethylbenzene 1/29/2014 2:54:00 PM2.0 µg/L 1ND

m,p-Xylene 1/29/2014 2:54:00 PM2.0 µg/L 1ND

o-Xylene 1/29/2014 2:54:00 PM2.0 µg/L 1ND

Styrene 1/29/2014 2:54:00 PM2.0 µg/L 1ND

Bromoform 1/29/2014 2:54:00 PM2.0 µg/L 1ND

Isopropylbenzene 1/29/2014 2:54:00 PM2.0 µg/L 1ND


1,2,3-Trichloropropane 1/29/2014 2:54:00 PM2.0 µg/L 1ND

Bromobenzene 1/29/2014 2:54:00 PM2.0 µg/L 1ND

n-Propylbenzene 1/29/2014 2:54:00 PM2.0 µg/L 1ND

2-Chlorotoluene 1/29/2014 2:54:00 PM2.0 µg/L 1ND


1,3,5-Trimethylbenzene 1/29/2014 2:54:00 PM2.0 µg/L 1ND

tert-Butylbenzene 1/29/2014 2:54:00 PM2.0 µg/L 1ND


sec-Butylbenzene 1/29/2014 2:54:00 PM2.0 µg/L 1ND

4-Isopropyltoluene 1/29/2014 2:54:00 PM2.0 µg/L 1ND

1,3-Dichlorobenzene 1/29/2014 2:54:00 PM2.0 µg/L 1ND


n-Butylbenzene 1/29/2014 2:54:00 PM2.0 µg/L 1ND


1,2-Dibromo-3-chloropropane 1/29/2014 2:54:00 PM5.0 µg/L 1ND

1,2,4-Trichlorobenzene 1/29/2014 2:54:00 PM2.0 µg/L 1ND

Hexachlorobutadiene 1/29/2014 2:54:00 PM2.0 µg/L 1ND

Naphthalene 1/29/2014 2:54:00 PM5.0 µg/L 1ND


Surr: Dibromofluoromethane 1/29/2014 2:54:00 PM68-122 %REC 1105

Surr: 1,2-Dichloroethane-d4 1/29/2014 2:54:00 PM74-124 %REC 1117

Surr: Toluene-d8 1/29/2014 2:54:00 PM69-121 %REC 1105

Surr: 4-Bromofluorobenzene 1/29/2014 2:54:00 PM62-129 %REC 199.4





Matrix: GROUNDWATER



Lab Order: 1401050

Lab ID: 1401050-02A

DF










Acetone 1/29/2014 3:28:00 PM10 µg/L 1ND

















Benzene 1/29/2014 3:28:00 PM1.0 µg/L 1ND







Toluene 1/29/2014 3:28:00 PM2.0 µg/L 1ND












Matrix: GROUNDWATER



Lab Order: 1401050

Lab ID: 1401050-02A

DF






o-Xylene 1/29/2014 3:28:00 PM2.0 µg/L 1ND

Styrene 1/29/2014 3:28:00 PM2.0 µg/L 1ND































Matrix: GROUNDWATER



Lab Order: 1401050

Lab ID: 1401050-03A

DF










Acetone 1/29/2014 4:02:00 PM10 µg/L 1ND

















Benzene 1/29/2014 4:02:00 PM1.0 µg/L 1ND







Toluene 1/29/2014 4:02:00 PM2.0 µg/L 1ND












Matrix: GROUNDWATER



Lab Order: 1401050

Lab ID: 1401050-03A

DF






o-Xylene 1/29/2014 4:02:00 PM2.0 µg/L 1ND

Styrene 1/29/2014 4:02:00 PM2.0 µg/L 1ND






























Collection Date: 1/27/2014 12:00:00 PM

Matrix: GROUNDWATER



Lab Order: 1401050

Lab ID: 1401050-04A

DF










Acetone 1/29/2014 4:37:00 PM10 µg/L 1ND

















Benzene 1/29/2014 4:37:00 PM1.0 µg/L 1ND







Toluene 1/29/2014 4:37:00 PM2.0 µg/L 1ND











Collection Date: 1/27/2014 12:00:00 PM

Matrix: GROUNDWATER



Lab Order: 1401050

Lab ID: 1401050-04A

DF






o-Xylene 1/29/2014 4:37:00 PM2.0 µg/L 1ND

Styrene 1/29/2014 4:37:00 PM2.0 µg/L 1ND























Surr: Dibromofluoromethane 1/29/2014 4:37:00 PM68-122 %REC 199.0






Client Sample ID: Dup

Collection Date: 1/27/2014

Matrix: GROUNDWATER



Lab Order: 1401050

Lab ID: 1401050-05A

DF










Acetone 1/29/2014 5:11:00 PM10 µg/L 1ND

















Benzene 1/29/2014 5:11:00 PM1.0 µg/L 1ND







Toluene 1/29/2014 5:11:00 PM2.0 µg/L 1ND










Client Sample ID: Dup

Collection Date: 1/27/2014

Matrix: GROUNDWATER



Lab Order: 1401050

Lab ID: 1401050-05A

DF






o-Xylene 1/29/2014 5:11:00 PM2.0 µg/L 1ND

Styrene 1/29/2014 5:11:00 PM2.0 µg/L 1ND





























Client Sample ID: TB


Matrix: GROUNDWATER



Lab Order: 1401050

Lab ID: 1401050-06A

DF










Acetone 1/29/2014 1:45:00 PM10 µg/L 1ND

















Benzene 1/29/2014 1:45:00 PM1.0 µg/L 1ND







Toluene 1/29/2014 1:45:00 PM2.0 µg/L 1ND










Client Sample ID: TB


Matrix: GROUNDWATER



Lab Order: 1401050

Lab ID: 1401050-06A

DF






o-Xylene 1/29/2014 1:45:00 PM2.0 µg/L 1ND

Styrene 1/29/2014 1:45:00 PM2.0 µg/L 1ND




























Initial Site Investigation Report Linton Residence Stowe, Vermont · 2014. 2. 11. · Management...

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