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STATE OF CONNECTICUT DEPARTMENT OF ENVIRONMENTAL PRO
SDMS DocID
Gallup's Quarry Federal National Priorities List Superfund Site
Plainfield, Connecticut SnpprfiimJ^jcoitfs Center.
Ground Water Use and Value Determinat&JiTE: (Vfl.J/1/fc?
BREAK: wv
Conclusions and Recommendations OTHER: ^l\^ The Connecticut
Department of Environmental Protection has determined that all of
the contaminated aquifer within the review area for the Gallup's
Quarry NPL site on Tarbox Road in Plainfield, Connecticut,
(including both the bedrock and overburden aquifers), is a Medium
Use and Value Aquifer, based on the considerations presented in the
attached Ground Water Use and Value Determination Document. The
Connecticut Department of Environmental Protection has also
determined that immediate restoration of the contaminated aquifer
is not required. A ground water restoration time frame of up to 30
years is acceptable.
The Connecticut Department of Environmental Protection has
undertaken this Ground Water Use and Value Determination pursuant
to a Memorandum of Agreement dated March 14, 1997 between the
Department and the US Environmental Protection Agency (EPA). This
determination has been conducted in accordance with EPA's April 3,
1996 Ground Water Use and Value Determination Guidance
Document.
CONNECprCUT DEPAR ENVIRQNMENTAX PRi
By Sidney J. Holbrook, Commissioner
( Printed on Recycled Paper)
79 Elm Street • Hartford, CT 06106 - 5127 An Equal Opportunity
Employer
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STATE OF CONNECTICUT DEPARTMENT OF ENVIRONMENTAL PROTECTION
BUREAU OF WATER MANAGEMENT PERMITTING, ENFORCEMENT &
REMEDIATION DIVISION
FEDERAL REMEDIATION PROGRAM
Gallup's Quarry Federal National Priorities List Superfund Site
Plainfield, Connecticut
Ground Water Use and Value Determination
Note: This document was prepared in accordance with EPA New
England's Final Draft Ground Water Use and Value Determination
Guidance, dated April 3, 1996. The data supporting this
determination were compiled from the various sources listed in the
references. No original data were collected by the Department in
support of this effort.
The Review Area considered in this determination was defined
initially by a two mile radius around the Gallup's Quarry site. The
Use and Value Determination Guidance specifies that this initial
two mile radius is a flexible guideline which can be expanded or
contracted based on the hydrogeologic setting. The scope of the
review area was contracted in some areas based on its hydrogeologic
setting. The boundaries of the review area, and of the relevant
drainage basins, are depicted in Figure 1. The boundaries of
drainage basins were determined from the State's Atlas of Public
Water Supply Sources and Drainage Basins of Connecticut (CTDEP,
1982).
The site is located within the Mill Brook Drainage Basin.
Groundwater from the site flows in a generally westerly to
northwesterly direction toward Mill Brook and its associated
wetlands (ES&E, 1996). The Fry Brook Drainage Basin adjoins the
northern side of the Mill Brook Drainage Basin. The mapped divide
between these two basins nearest to the site is located in the
wetland area to the northwest of the site, near the Plainfield
sewage treatment plant. Because of the fiat, swampy topography in
this area, the mapped location of this divide can be regarded as
only approximate. For this reason, those portions of both the Mill
Brook and Fry Brook Drainage Basins within a two mile radius of the
site are included in the study area.
Overall Rating: Medium
The State has assigned a Medium overall Use and Value to the
ground water within the review area for the Gallup's Quarry
Superfund Site. This rating was determined through balancing the
eight factors described in the EPA guidance document.
The site is located within a highly productive stratified drift
aquifer, which provides ground water for three different water
supply systems within the review area. These systems currently
serve between 2,000 and 2,300 customers, and demand is expected to
grow well into the 21st century. In addition, numerous private
wells exist in the area.
Water quality classifications are depicted in Figure 2. The
ground water classification for most of the area to the south, east
and west of the site, as well as the site itself, is GA. This
classification means the ground water is presumed to be suitable
for direct human consumption without
( Printed on Recycled Paper )
79 Elm Street • Htrtford. CT 06106 - 5127 An Equal Opportunity
Employer
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Gallup's Quarry NPL Site Preliminary Ground Water Use and Value
Determination Page 2 of 10
treatment, and the State's goal is to maintain drinking water
quality. Ground waters with a classification of GA are designated
for use as existing private and potential public water supplies.
The ground water classification for the northern portion of the
Gallup's Quarry site, including the former Primary and Secondary
Disposal Areas, was formerly GB/GA, indicating that the water may
not have been considered suitable for direct human consumption
without treatment (CTDEP, 1986). The State's goal was to restore
the ground water to drinking water quality (CTDEP, 1992, p. 40).
However, under the revised Ground Water Quality Standards which
became effective on April 12, 1996, this dual classification has
been eliminated. All areas which were formerly designated as GB/GA
are now classified as GA. The GA classification signifies that the
ground water is presumed to be of natural quality and suitable for
drinking without treatment (CTDEP, 1996, p. 27).A notation will be
made in the State's ground water quality maps indicating that this
assumption is not currently true in former GB/GA areas. Water
quality in the remainder of the review area has retained its GA
classification (CTDEP, 1993). The State's goal of maintaining or
restoring the ground water in GA areas to natural quality remains
unchanged (CTDEP, 1996, p. 22).
Connecticut's Water Quality Standards are an important element
of Connecticut's EPA endorsed Core Comprehensive State Ground Water
Protection Program. The ground water classifications assigned under
these standards have been derived through careful consideration of
many of the same factors addressed in EPA's Ground-water Use and
Value Determination Guidance. A hierarchy of designated uses is
included for each ground water classification. The ground water
classifications therefore represent, hi effect, the State's
determination regarding the use and value of the ground water.
The State's Remediation Standard Regulations (Regulations of
Connecticut State Agencies, Sections 22a-133k-l to 3, 22a-133q-l,
and 22a-209-l) were adopted in January 1996. These provide specific
numerical criteria for remediation of a wide range of pollutants in
soils and ground water. It is important to note that the
requirements of these regulations will apply to any remedy which is
selected at this site. These regulations establish numeric criteria
for various contaminants based on the ground water
classification.
1. Quantity: High
The site is within an area of relatively thick, saturated
stratified drift extending from Lillibridge Road north through the
site and into the Fry Brook and Horse Brook Valleys, in the central
portion of the Mill Brook Basin. Boring logs of wells and test
borings drilled during the remedial investigation generally
confirmed that stratified drift in the area is underlain by glacial
till and crystalline bedrock. The southeastern portion of the site
is a till/ bedrock hill, and stratified drift was not noted hi this
area. The saturated thickness of the stratified drift generally
increases moving northwesterly from this hill toward Mill Brook
(ES&E, 1996, p. 3-14). Mapping of the
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Gallup's Quarry NPL Site Preliminary Ground Water Use and Value
Determination Page 3 of 10
piezometric surface conducted as part of the Remedial
Investigation suggests that Mill Brook is a gaining stream in this
area (ES&E, 1996, p. 3-19). Stratified drift thicknesses ranged
from zero to approximately 70 feet (ES&E, 1996, p. 3-6). The US
Geological Survey has identified this area as a major stratified
drift aquifer (Melvin and others, 1995, p. 17). Randall and others
(1966, p. 85-90) identified this aquifer as one of 29 within the
Quinebaug River Basin that is especially favorable for ground water
development. They estimated the long term yield for this aquifer to
be 2.3 million gallons/day. The Gallup Water Service Company's well
field is located approximately 0.75 miles north-northwest of the
site, and is currently withdrawing an estimated 0.3 to 0.4 million
gallons/day from this aquifer (Melvin and others, 1995, p. 8).
2. Quality: Medium
The site is approximately one mile south of the down town
portion of Plainfield. An industrial park is located to the north
of the site, on the opposite side of Mill Brook. The Intermark
Fabric Corporation (formerly the Pervel Industries Flock Plant) and
a Safety Kleen Corporation waste accumulation facility are located
within this industrial park. The Safety Kleen facility was formerly
owned by Pervel. Documented releases of chlorinated solvents are
known to the Department to have occurred at the former Pervel
Flocking Plant. The area of downtown Plainfield is heavily
urbanized and industrialized, with numerous documented sources of
contamination. The areas to the south, east and west are
predominantly rural or suburban and have only a few minor
documented releases. •
Ground water quality classifications within the study area are
depicted in Figure 2. The Department has assigned a ground water
quality classification of GB to most of the urbanized area to the
north of the site (CTDEP, 1986).This classification is assigned to
ground water within highly urbanized areas or areas of intense
industrial activity where public water supply service is available.
The water may not be suitable for direct human consumption without
treatment due to waste discharges, spills, and leaks of chemicals
or due to land use impacts (CTDEP, 1992, p. 41). The Department's
goal is to prevent further degradation by preventing any further
discharges which would cause irreversible contamination.
A large mill building is located within the GB area,
approximately one half mile north northeast of the former Primary
and Secondary Disposal Areas. This building formerly housed the
InterRoyal Company, and the main plant of Pervel Industries, a
manufacturer of coated fabrics. Currently this building houses
several tenants. Widespread contamination is known to the
Department to exist on this site as a result of past operations of
Pervel and InterRoyal. The Department considers this site to be a
major source of contamination. The Town of Plainfield's waste water
treatment facility is located approximately one quarter mile
northwest of the former Primary and Secondary Disposal Areas, near
the junction of Mill Brook and Frye Brook. After tertiary
treatment, waste water from this plant is discharged to Mill Brook,
downstream from
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Gallup's Quarry NPL Site Preliminary Ground Water Use and Value
Determination Page 4 of 10
Gallup's Quarry. The average daily flow through this plant is
approximately 0.55 million gallons/day, with peak discharges
approaching the design capacity of 0.75 million gallons/day (Melvin
and others, 1995, p. 14). The area served by this facility is
similar in extent to the Gallup's Water Service Company's service
area. The sewage treatment plant as well as most of downtown
Plainfield, including the former Pervel Flock Plant and Main Plant,
are located in the Fry Brook Drainage Basin.
Most of the rural and suburban area to the south, east, and west
has a ground water quality classification of GA (CTDEP, 1986). This
classification is assigned to ground waters within the area of
influence of private or potential public water supplies. The ground
water is presumed to be suitable for direct human consumption
without treatment. The State's goal is to maintain drinking water
quality.
The areas within approximately a 500 foot radius surrounding the
well fields for each of the three public water supply systems
within the study area have been assigned a ground water quality
classification of GAA (CTDEP, 1986). This classification is
assigned to waters which are tributary to public water supply
watersheds or within the area of influence of community or
non-community water supply wells. The State's goal is to maintain
drinking water quality.
The three local water companies are required to monitor water
quality in their wells on a regular basis and to submit the results
of this monitoring to the Water Supplies Section of the Connecticut
Department of Public Health. This monitoring has shown that water
quality in all three systems has usually met the requirements of
the Connecticut Public Health Code (Vicky Carrier, Connecticut
Dept. of Public Health, Water Supplies Section, written commun.,
1996). In 1993, an exeedance of Maximum Contaminant Levels for lead
and copper was reported in the Brookside Water Company system.
Seasonal pH adjustment was implemented to correct this problem, and
no further exceedances have been reported. Melvin and others (1995,
p. 8) reported that during the past ten years some customers of the
Glen Acres Water Company have installed private wells due to high
iron and manganese levels in the public water supply. To correct
this problem, the company installed a 440 foot deep bedrock well in
November, 1995 (Vicky Carrier, Connecticut Dept. of Public Health,
Water Supplies Section, written commun., 1996).
The northern portion of the site itself, including the former
Primary and Secondary Disposal Areas and the former Seepage Bed,
formerly had ground water quality classification of GB/GA (CTDEP,
1986). However, under the revised Ground Water Quality Standards
which became effective on April 12,1996, this dual classification
has been eliminated. All areas which were formerly designated as
GB/GA are now classified as GA. This does not indicate that the
contamination in the area has been eliminated. The water quality
classification map for former GB/GA areas will continue to note
that water quality in the area is degraded, until the State's goal
of restoring natural ground water quality has been achieved. The GA
classification signifies
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Gallup's Quarry NPL Site Preliminary Ground Water Use and Value
Determination Page 5 of 10
that the ground water is presumed to be of natural quality and
suitable for drinking without treatment (CTDEP, 1996, p. 27), Water
quality in the remainder of the review area has retained its GA
classification (CTDEP, 1986).
3. Current Public Water Supply Systems: High
Two public water supply well fields are located within the
Review Area (CTDEP, 1982), while one additional system, the Glen
Acres Water Company, is located immediately adjacent to the review
area in the Quinebaug River Drainage Basin. The locations of these
well fields are depicted in Figure 3. In addition, wells serving
the Westview Terrace Mobile Home Park and the Cemetery Road
Apartments are located near the northern edge of the review area.
The Hilldale Water Company well field is located on the northern
boundary of the review area.
The Gallup Water Service Company's well field is located
approximately 0.75 miles north-northwest of Gallup's Quarry.
According to the most recent sanitary survey performed in May 1995
by the Connecticut Department of Public Health, (Vicky Carrier,
Connecticut Dept. Of Public Health, Water Supplies Section, written
commun., 1996), this system has approximately 550 service
connections and is estimated to serve approximately 2,200 persons.
The system's two gravel pack wells currently produce 300,000 to
400,000 gallons of water per day, operating between 5 and 6 hours
per day at an average flow rate of 1,000 gallons per minute (Melvin
and others, 1995). According to the Health Department's sanitary
survey, one of the two wells is currently inactive. The well head
protection area for this system has been mapped on a preliminary
level under the Department of Environmental Protection's Aquifer
Protection Program. The closest boundary of the initial aquifer
protection setback area as mapped by Lenard Engineering Inc.
(undated) is approximately 1000 feet north of Gallup's Quarry. The
location of the setback area is depicted in-Figure 3. Detailed
mapping of actual contribution areas is planned but has not yet
been completed (Corinne Fitting, Connecticut Dept. of Environmental
Protection, Water Management Bureau, Planning and Standards
Division, oral commun., 1996). It is expected that the final
boundaries of the aquifer protection area will be smaller than the
initial setback area when detailed mapping is completed. The
service area of this system is primarily within the downtown area
of Plainfield and the adjacent areas.
The two dug wells of the Brookside Water Company are located
approximately one mile northeast of the northern portion of
Gallup's Quarry. According to the most recent Department of Public
Health Sanitary Survey, which was completed in May 1995, this
system has 229 service connections and serves an estimated 802
people (Vicky Carrier, Connecticut Dept. of Public Health, Water
Supplies Section, written commun., 1996). This system primarily
serves a subdivision on the eastern side of Interstate 395, to the
east-northeast of the site (Melvin and others, 1995, page 9). These
two wells have current long term yields of approximately 45 gallons
per minute, with a total average demand in 1993 of 33,500 gallons
per day (Lenard Engineering,
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Gallup's Quarry NPL Site Preliminary Ground Water Use and Value
Determination Page 6 of 10
1994). Aquifer protection mapping has not been completed for
this system. The requirements of Connecticut's Aquifer Protection
Program do not apply to water systems with less than 1,000
customers.
The Glen Acres Water Company well field is located on
Lillibridge Road, approximately 0.4 miles west of Gallup's Quarry.
The supply for this system consists of three drilled wells, one
with a depth of 72 feet, the other with a depth of 64 feet, and the
third with a depth of 440 feet. According to the most recent
Department of Public Health Sanitary Survey, which was completed in
May 1995, this system has 36 service connections, and serves a
total estimated population of 144 people. The service area for this
water system is located along Tarbox Road and Lillibridge Road. An
average of approximately 6,000 gallons of water per day are
withdrawn by this system. Aquifer protection area mapping has not
been completed for this system. Gallup Water Service, Inc. recently
took over operation of this utility, which is now known as the
Gallup Water Service, Lillibridge Division. Due to high levels of
iron in the two shallow wells, the utility installed the 440 foot
deep bedrock well in November 1995. This well is located
approximately 80 feet away from the two previously existing wells.
Its measured yield is approximately 15 gallons/minute (Vicky
Carrier, Connecticut Dept. of Public Health, Water Supplies
Section, written commun., 1996). The deeper well was recently
placed in service and now serves as the primary water source for
this system. The two more shallow wells will be retained as backup
sources.
The Plainfield Greyhound Park is located approximately 3,500
feet southeast of the northern portion of the site. This facility
is served by three wells (CTDEP, 1982).
Previous studies (Fuss & O'Neill, Inc., 1979; Melvin and
others, 1995), as well as the Remedial Investigation recently
completed by ES& E (1996) indicate that ground water flow from
the site is northwesterly to northeasterly toward Mill Brook.
Melvin and others (1995, p.24) noted that although Mill Brook
appears to be the discharge point for ground water flowing from the
Gallup's Quarry area, "the possibility of deeper regional flow, in
which water in the crystalline bedrock flows beneath the Mill Brook
drainage divide toward the Quinebaug River, although small, cannot
be excluded". Several shallow overburden wells were installed on
the opposite side of Mill Brook from the site. Ground water flow in
these wells was toward Mill Brook. No bedrock wells were installed
on the opposite side of Mill Brook as part of the Remedial
Investigation.
Water quality in all of these community water systems is
monitored on a regular basis and the results are reported to the
Connecticut Department of Public Health. No site related
contaminants have been detected in water samples collected from
these wells (Vicky Carrier, Connecticut Dept. of Public Health,
Water Supplies Section, written commun., 1996). The preliminary
aquifer protection mapping performed for the Gallup Water Service
Company suggests that site
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Gallup's Quarry NPL Site Preliminary Ground Water Use and Value
Determination Page 7 of 10
contaminants do not pose a threat to this well field. Available
hydrogeologic information suggests that neither the Brookside Water
Company well field nor the Glen Acres Water Company well field are
located in the down gradient direction from the site. However, the
areas of contribution for these well fields have not been
mapped.
4. Current Private Drinking Water Supply Wells: Medium
The area immediately surrounding the site is not served by
public water. Numerous private wells exist in the area. Water
samples were collected from 10 private wells in 1989 by Roy F.
Weston, Inc. (1989) under contract to EPA. Low concentrations of
volatile organic compounds, semi-volatile organic compounds, and
metals, all below Maximum Contaminant Levels (MCLs), were detected
in several wells. Weston sampled 8 additional wells in 1993. Again,
no contaminants exceeding MCLs were detected.
The regional ground water flow in the area is toward the
northwest in the direction of Mill Brook, and its associated
wetlands. This area is unoccupied, and private wells would not be
expected hi this area. The populated areas father to the north and
west, on the far side of Mill Brook, are within the service area of
the Gallup Water Service Company. The residential wells in the
immediate vicinity of the site are concentrated to the east and
south along Route 12, and to the immediate southwest, along Tarbox
Road. These residential areas do not appear to be down gradient
from the site, and do not appear to be threatened by site-related
ground water contaminants. A number of private wells in the area
were sampled by ES&E (1996) as part of the Remedial
Investigation. No site related contaminants were detected.
The northeastern extent of the Glen Acres Water Company's
service area terminates just to the west of the site, on Tarbox
Road. However, no information is available to indicate whether this
system would have sufficient excess capacity to be extended to
accommodate additional customers. The Gallup Water Company's
service area terminates approximately 1/4 mile north of the
northern portion of Gallup's Quarry, along Route 12. The closest
portion of the Brookside Water Company service area is
approximately 3/4 mile north of the northern portion of the site,
on the opposite side of Interstate 395 (ES&E, 1996).
5. Likelihood and Identification of Future Drinking Water Use:
Medium
The Gallup Water Company Water Supply Plan (Lenard Engineering,
Inc., 1994) projects that the total number of service connections
in its system will increase from 568 in 1993 to 708 in 1998 to 1044
in 2010, and 1564 in 2040. Average daily usage is projected to
increase from 271,000 gallons/day in 1993 to 355,000 gallons per
day in 1998, to 529,000 gallons/day in 2010, to 735,000 gallons per
day in 2040. Most of this projected growth is due to the company's
plans to gradually increase the size of its service area. The
company projects that it can meet this
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Gallup's Quarry NPL Site Preliminary Ground Water Use and Value
Determination Page 8 of 10
increased demand by adding storage tanks to the system. The
estimated available supply is 1.08 million gallons/day. No
additional wells are expected to be required within the next 50
years. Since the supply wells are currently operating an average of
5 to 6 hours per day (Melvin and others, 1995, p. 8), it is
presumed that some of the projected increase in demand could be met
by increased withdrawals from the existing wells.
The Water Supply Plan for the Brookside Water Company (Lenard
Engineering, Inc., 1994) projects that the total number of service
connections will increase from 202 in 1993 to 235 in 1998 to 267 in
2010, with no further growth forecast beyond that time. The
estimated available supply is 75,600 gallons/day. Average daily
demand is projected to increase from 33,500 gallons in 1993 to 39,
900 gallons in 1998 to 46,500 gallons per day in 2010. This
expected increase is due to planned expansion of the service area.
Possible future improvements to the system include a new well
within 20 years. The plan does not specify the size or location of
the future well.
No information is available regarding future consumption or
supply trends for the Glen Acres Water Service Company.
6. Other Current or Reasonably Expected Ground Water Uses in
Review Area: Medium
The area to the south and west is rural, with some agricultural
land use. Since this area is not served by a public water supply,
any future agricultural or industrial users in this area would be
expected to use ground water. These possible future uses do not
appear to be threatened by on-site contaminants. The Remedial
Investigation conducted by ES&E (1996) indicates that the
ground water contaminant plume from the site is moving toward the
northwest in the direction of Mill Brook.
7. Ecological Value: Medium
On-site ground water contributes a portion of hydrologic support
to the wetlands adjacent to the Mill Brook. ES&E (1995) mapped
wetlands on the site and hi the surrounding area. Most of the
wetlands identified are associated with Mill Brook and its
tributaries. No extensive wetlands were identified within the
boundaries of Gallup's Quarry. The wetlands associated with Mill
Brook extend into a small portion of the northeastern section of
the property, to the east of the former Primary and Secondary
Disposal Areas.
The U.S. Fish and Wildlife Service performed a habitat
characterization survey of the site in 1993 (ES&E, 1995). They
noted that the site was highly disturbed due to past excavation and
industrial activity. No unusual plant or animal species were
identified within the site.
No ecological risk assessment has been performed at this site to
date.
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Gallup's Quarry NPL Site Preliminary Ground Water Use and Value
Determination Page 9 of 10
Three areas included in the Department's Natural Diversity
Database are located within the study (ConnDEP, 1995). All of these
are located to the north of Gallup's Quarry. A State Species of
Special Concern, Ambystoma laterale, (blue spotted salamander
complex), occurs in this area. This population is a hybrid between
the blue spotted salamander and a related species. Ambystoma
laterale (blue spotted salamander) also occurs within the study
area as a non-hybridized population. This is a State Threatened
species. A Federal and State Endangered plant species, Agalinus
acuta (sand plain gerardia), also occurs within the study area.
Although these species have not been documented on the site, the
salamanders could migrate to the site (Dawn M. McKay, Connecticut
Dept. of Environmental Protection, Natural Resources Center,
written commun., 1996). The general locations of these areas are
shown in Figure 4. ES&E (1996, p.320) found that the wetland
area bordering the southwestern portion of the site is a white
cedar swamp. Several other white cedar swamps within the area are
included on the State's Natural Resources Diversity Database. No
threatened or endangered species were noted within the site
boundaries by ES&E.
8. Public Opinion: Medium
Minimal feed back has been received from the public regarding
the use and value of the ground water at this site, or any other
issues regarding the Gallup's Quarry site. The Department held
public hearings in 1981 when the ground water quality goals were
established for this area. The records for this hearing, and for
subsequent revisions hi 1986 show that no input was received from
the Town of Plainfield or its citizens. The Department provided
ample opportunity for comment during both the hearings and the
regional workshops which preceded the hearings. During the past
four years the Department's Project Manager for the Gallup's Quarry
Superfund site has received few citizen inquiries regarding the
site.
References
Connecticut Department of Environmental Protection, 1986, Water
Quality Classification Map of the Thames, Southeast Coast and
Pawcatuck River Basins. 2 blue line sheets.
Connecticut Department of Environmental Protection, 1992, Water
Quality Standards, Adopted January 1992, Effective May 15, 1992, 68
pages.
Connecticut Department of Environmental Protection, 1995,
Natural Resources Diversity Database Map of the Plainfield
Quadrangle. Unpublished 1:24,000 scale map on file at the
Connecticut Department of Environmental Protection Natural
Resources Center, Hartford, Connecticut.
Connecticut Department of Environmental Protection, 1996, Water
Quality Standards, Surface
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Gallup's Quarry NPL Site Preliminary Ground Water Use and Value
Determination Page 10 of 10
Water Quality Standards Effective May 15, 1992, Ground water
Quality Standards Effective April "12, 1996,49 pages.
Environmental Science and Engineering, Inc. (ES&E), 1995,
Gallup's Quarry Superfund Project, Plainfield, Connecticut, Initial
Site Characterization Report- Phase 1 A. Unpublished report, 5
volumes.
Environmental Science and Engineering, Inc. (ES&E), 1996,
Gallup's Quarry Superfund Project, Plainfield, Connecticut,
Remedial Investigation Report - Phase 1 A. Unpublished report, 9
volumes, 2nd revision dated October 22,1996.
Lenard Engineering, Inc., 1994, Water Supply Plan Prepared for
Gallup Water Service, Including: Gallup Water Service, Brookside
Water Company, Country Mobile Estates. Storrs, Connecticut, Lenard
Engineering, Inc., 1 loose leaf volume, on file with Connecticut
Department of Environmental Protection, Water Management Bureau,
Planning and Standards Division.
Lenard Engineering, Inc., undated, Map of Gallup Water Company
Wells 1 & 2 Level B Aquifer Protection Areas. Storrs,
Connecticut, Lenard Engineering, Inc., 2 sheets, on file with
Connecticut Department of Environmental Protection, Water
Management Bureau, Planning and Standards Division.
Melvin, R.L., Stone, J.R., Craft, P. A., and Lane, J.W.,
Geohydrology of the Gallup's Quarry Area, Plainfield, Connecticut:
U.S. Geological Survey Water Resources Investigations Report
93-4138.
Randal, A.D., Thomas, M.P., Thomas, C.E., Jr., and Baker, J.A.,
1966, Water Resources Inventory of Connecticut, Part 1, Quinebaug
River Basin: Connecticut Water Resources Bulletin 8, Prepared by
the US Geological Survey in Cooperation with the Connecticut Water
Resources Commission, 102 p.
Roy F. Weston, Inc., 1989, Residential Drinking Water Sampling,
Gallup Quarry Site, Plainfield, Connecticut, January 23-24, 1989.
Prepared for U.S. Environmental Protection Agency by Roy F. Weston,
Inc., Technical Assistance Team. 1 bound volume.
US Environmental Protection Agency, 1995, Draft Groundwater Use
and Value Determination Guidance. EPA New England, Boston, MA,
draft document dated August 31,1995, 31 pages.
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Figure 1 Gallup's Quarry Federal Superfund Site Groundwater Use
And Value Determination Study Area Location
o 0.5 1.5 2 mile L I I j
Scale
Study Area Drainage Divide
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Figure 2 Gallup's Quarry Federal Superfund Site Groundwater Use
And Value Determination State Surface and Ground Water
Classification
o I
0.5 I
Scale
1.5 I
2j
mile
Study Area
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Figure 3 Gallup's Quarry Federal Superfund Site Groundwater Use
And Value Determination Public Water Supply Wells and Level B
Aquifer Protection Areas
o I
0.5 I
Scale
1.5 I
2I mile
Study Area
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Figure 4 Gallup's Quarry Federal Super-fund Site Groundwater Use
And Value Determination Areas of Ecological Value
0.5 1.5 2 mile i I I
Scale
Source: Natural Diversity Data Base Natural Resources Center, CT
DEP
Study Area Areas of Ecological Value