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PUBLIC HEALTH ASSESSMENT

GARDEN CITY PARK INDUSTRIAL AREA (GCPIA)
(a/k/a FULTON AVENUE)
NORTH HEMPSTEAD, NASSAU COUNTY, NEW YORK


APPENDIX A: FIGURES

Location of Garden City Park Industrial Area (GCPIA), Nassau County
Figure 1. Location of Garden City Park Industrial Area (GCPIA), Nassau County

Public Water Supply Wells in the 150 Fulton Avenue/Garden City Park Industrial Area (GCPIA) Area of Study
Figure 2. Public Water Supply Wells in the 150 Fulton Avenue/Garden City Park Industrial Area (GCPIA) Area of Study

Garden City Park Industrial Area, Historic Users of VOCs
Figure 3. Garden City Park Industrial Area, Historic Users of VOCs

150 Fulton Avenue, Site Sketch
Figure 4. 150 Fulton Avenue, Site Sketch


APPENDIX B: TABLES

TABLE 1. PUBLIC WATER SUPPLY WELLS IN 150 FULTON AVENUE/GCPIA STUDY AREA.
Adapted from Nassau County 1993 report: NCDH/NCDPW Cooperative Agreement Project - Garden City Park Groundwater Quality Study Preliminary Report.

WELL N-#

LOCAL WELL #

WATER DISTRICT

SCREEN INTERVAL (ft)

DISTANCE & DIRECTION from GCPIA

STATUS

REMARKS

N-3185 4 Mineola Village 423-463 2,000 ft E ** In Use with VOC Removal PTA Treatment installed in 1987
N-2565 3 Garden City Park 370-405 2,000 ft NNW ** Not Used Not Used Since 1968 due to Nitrates; Also Not Used due to VOCs
N-8409 9 Garden City Park 340-400 400 ft NW ** In Use with VOC Removal Not Used Between 1989 and 1991 due to VOCs; Re-Used Since 1991 with PTA Treatment; PTA System Upgraded in 1998
N-3881 9 Garden City Village 426-468 7,500 ft SW Not Used Not Used Since 1986 due to VOCs
N-5163 12 Garden City Village 425-475 2,000 ft SE ** In Use with VOC Removal PTA Treatment installed in 1994
N-7058 13 Garden City Village 248-286 7,000 ft SW In Use with VOC Removal PTA Treatment Installed in 1989
N-8339 14 Garden City Village 308-358 7,000 ft SW In Use with VOC Removal PTA Treatment Installed in 1988
N-3603 1 Franklin Square 443-493 10,000 ft SSW In Use No VOC Treatment; Well Samples Meet VOC Standards
N-3604 2 Franklin Square 433-483 10,000 ft SSW In Use No VOC Treatment; Well Samples Meet VOC Standards
N-7117 4 Franklin Square 378-486 15,000 ft SSW In Use with VOC Removal GAC Treatment installed in 1991; currently being upgraded to PTA
N-8818 5 Franklin Square 420-480 15,000 ft SSW In Use with VOC Removal GAC Treatment installed in 1989; currently being upgraded to PTA
N-0693 15D Water Authority of Western Nassau (formerly with Jamaica Water Supply Co.) 68-93 * 17,000 ft SW Not Used Not Used Since 1993 due to VOCs
N-4077 35 Water Authority of Western Nassau 70-90 * 10,000 ft WSW In Use with VOC Removal PTA Treatment installed in 1985
N-4298 35A Water Authority of Western Nassau 344-394 10,000 ft WSW In Use with VOC Removal PTA Treatment installed in 1985
N-5155 44 Water Authority of Western Nassau 70-90 * 14,000 ft SW In Use with VOC Removal PTA Treatment installed in 1992
N-5156 44A Water Authority of Western Nassau 291-331 14,000 ft SW In Use with VOC Removal PTA Treatment installed in 1992
N-6744 44B Water Authority of Western Nassau 74-94 * 14,000 ft SW In Use Removed from service in 1978 due to VOCs; Reused since 1988; Well Samples now consistently Meet VOC Standards
N-6745 44C Water Authority of Western Nassau 304-344 14,000 ft SW In Use with VOC Removal PTA Treatment Available as early as 1990; Used only occasionally until 1995; Used Consistently since 1995
N-7649 57 Water Authority of Western Nassau 185-205 8,000 ft WSW In Use with VOC Removal PTA Treatment installed in 1984
N-7650 57A Water Authority of Western Nassau 400-440 8,000 ft WSW In Use with VOC Removal PTA Treatment installed in 1985

Notes for Table 1

* These wells are relatively shallow and distant from the GCPIA. Contamination in these wells could be related to a source other than the GCPIA.

** These wells are either side(cross)-gradient or slightly up-gradient from, though near, the GCPIA. Changes in subsurface flow gradients and downward (vertical) migration, coupled with a strong cone of influence from well pumpage, might result in GCPIA contaminant impacts to these wells. This would be particularly true of well N-8409 which is very close to the GCPIA.

VOC = Volatile Organic Compounds (such as PCE, TCE, and TCA)
GAC = Granular Activated Carbon
PTA = Packed Tower Aeration


TABLE 2. AIR SAMPLE RESULTS for 150 Fulton Ave./GCPIA Site
See Table # 8 for Public Health Comparison Values
All values in micrograms per cubic meter of air (µg/m3)

Analytes ON-SITE (150 Fulton Ave)

Before Soil Vapor Extraction

OFF-SITE Within GCPIA
(Immediately West of 150 Fulton Ave.)
Indoor Air Outdoor Air Soil Vapor
FoD Range FoD Range FoD Range
vinyl chloride 0/3 <450 - <530 0/1 <430 0/1 <590
chloroethane 0/3 <190 - <220 0/1 <240 0/1 <260
t-1,2-dichloroethene 0/3 <190 - <220 0/1 <240 0/1 <260
c-1,2-dichloroethene 0/3 <190 - <220 0/1 <240 0/1 <260
1,1,1-trichloroethane 0/3 <190 - <220 0/1 <240 0/1 <260
trichloroethene 0/3 <190 - <220 0/1 <240 0/1 <260
tetrachloroethene 4/6 <190 - 280 0/3 <5 - <240 0/3 <5 - <260

  After Soil Vapor Extraction  
tetrachloroethene 8/8 9 - 14 0/4 <5 Not Sampled

FoD = Frequency of Detection: # Detections/# Analyses
Results of three indoor and one soil vapor sorbent tube samples collected in April 1995. Tetrachloroethene (also called PCE or perc) results also include results of six indoor, two outdoor, and two soil vapor "Perc Badge" samples collected in June 1998.


TABLE 3. SUBSURFACE SOIL SAMPLE RESULTS, On-Site (150 Fulton Avenue)
See Table #8 for Public Health Comparison Values
All values in milligrams per kilogram (mg/kg)

Analytes Intermediate Depth Soil
3' - 16' Depth
Deep Soil
> 16' Depth
Dry Well Sediments
(20-25' depth)
FoD
Range
FoD
Range
FoD
Range
vinyl chloride
0/2
<0.0005
0/19
<0.0005
0/2
<0.010
chloroethane
0/2
<0.0005
0/19
<0.0005
0/2
<0.010
dichloromethane
0/2
<0.0005
0/19
<0.0005
0/2
<0.010
trichloromethane
0/2
<0.0005
0/19
<0.0005
0/2
<0.010
t-1,2-dichloroethene
0/2
<0.0005
0/19
<0.0005
0/2
<0.010
c-1,2-dichloroethene
0/2
NR
0/19
NR
1,1,1-trichloroethane
0/2
<0.0005
0/19
<0.0005
0/2
<0.010
trichloroethene
0/2
<0.0005
0/19
<0.0005
0/2
<0.010
tetrachloroethene
1/2
<0.0005 - 0.3
15/19
<0.0005 - 20,000
2/2
2,600 - 5,300
toluene
 
NA
 
NA
0/2
<0.010
ethyl benzene
 
NA
 
NA
0/2
<0.010
xylenes
 
NA
 
NA
0/2
<0.010

FoD = Frequency of Detection: # Detections/# Analyses
NA = Not Analyzed
NR = Not Reported

Results of numerous Geoprobe soil samples collected in April 1994, April 1995, June 1995, and December 1995 during two investigations of the Garden City Park Industrial Area. Each investigation was conducted by Dvirka and Bartilucci, Inc. under contract to the New York State Department of Environmental Conservation. The results are reported in: Focused Remedial Investigation Report for the Fulton Avenue Site, Garden City Park, Nassau County, New York (Site Registry No. 1-30-073), November 1996; and Preliminary Site Assessment Report - Garden City Park Industrial Area, Town of North Hempstead, Garden City Park, Nassau County, New York, September 1994.


TABLE 4. SUBSURFACE SOIL SAMPLE RESULTS, Off-Site But Within GCPIA
See Table #8 for Public Health Comparison Values
All values in milligrams per kilogram (mg/kg)

Analytes Shallow Soil
0' - 3' Depth
Intermediate Depth Soil
3' - 16' Depth
Deep Soil
> 16' Depth
FoD
Range
FoD
Range
FoD
Range
vinyl chloride
0/5
<0.01
0/9
<0.01
0/13
<0.01
chloroethane
0/5
<0.01
0/9
<0.01
0/13
<0.01
t-1,2-dichloroethene
0/5
<0.01
1/9
<0.010
0/13
<0.01
c-1,2-dichloroethene
0/5
<0.01
0/13
<0.01
1,1,1-trichloroethane
0/5
<0.01
0/9
<0.01
0/13
<0.01
trichloroethene
1/5
<0.01
1/9
<0.01
0/13
<0.01
tetrachloroethene
3/5
<0.01 - 0.016
2/9
<0.01 - 0.079
1/13
<0.01 - 0.2
acetone
 
NA
1/1
0.023
 
NA
toluene
 
NA
0/1
<0.01
 
NA
ethyl benzene
 
NA
0/1
<0.01
 
NA
xylenes
 
NA
0/1
<0.01
 
NA

FoD = Frequency of Detection: # Detections/# Analyses
NA = Not Analyzed
NR = Not Reported

Results of numerous Geoprobe and hand auger (shallow) soil samples collected in April 1994, June 1995, December 1995, January 1996, and May 1996 under three distinct investigations of the Garden City Park Industrial Area. Each investigation was conducted by Dvirka and Bartilucci, Inc. under contract to the New York State Department of Environmental Conservation. The results are reported in the following NYSDEC documents: Focused Remedial Investigation Report for the Fulton Avenue Site, Garden City Park, Nassau County, New York (Site Registry No. 1-30-073), November 1996; Preliminary Site Assessment Report - Sprague Goodman Electronics, Joseph Struhl Company, Precision Fabricators, Mercury Electric (Site Registry No. 1-30-073A, B, C, & D), July 1996; and Preliminary Site Assessment Report - Garden City Park Industrial Area, Town of North Hempstead, Garden City Park, Nassau County, New York, September 1994.


TABLE 5. SURFACE SOIL SAMPLE RESULTS, Off-Site But Near GCPIA

Analytical results for soil samples collected from ball fields at the Mineola High School. Samples were collected by New York State Department of Health (NYSDOH) on February 15, 1996, analyzed by the NYSDOH Wadsworth Center, and reported on April 16, 1996. See Table #8 for Public Health Comparison Values.

Volatile Organic Compound (VOC) Analytes

Surface Soil Samples
0" - 4" Depth

FoD

Range, Values in milligrams per kilogram (mg/kg)

vinyl chloride 0/5 < 1.5 - < 2.1
chloroethane 0/5 < 1.5 - < 2.1
dichloromethane (methylene chloride) 5/5 0.26 - 0.47
trichloromethane (chloroform) 2/5 < 1.5 - 0.032
1,2-dichloroethene, cis- and trans- 0/5 < 1.5 - < 2.1
1,1,1-trichloroethane 3/5 < 1.5 - 0.074
trichloroethene 0/5 < 1.5 - < 2.1
tetrachloroethene (perc) 0/5 < 1.5 - < 2.1
acetone 0/5 < 1.5 - < 2.1
2-butanone (MEK) 2/5 < 1.5 - 0.92
toluene 3/5 < 1.6 - 0.050
chlorobenzene 1/5 < 1.5 - 0.013
ethyl benzene 5/5 0.008 - 0.018
xylenes, total 5/5 0.038 - 0.061

FoD = Frequency of Detection: # Detections/# Analyses

Less than (<) values are contract required quantitation limits (CRQLs); minimum detectable limits (MDLs) are two to three orders of ten lower.


TABLE 6. SUMMARY OF ANALYTICAL RESULTS FOR GROUNDWATER SAMPLES, 150 FULTON AVENUE/GCPIA STUDY AREA
See Table#8 for Public Health Comparison Values.

Summary of results from numerous monitoring well and Geoprobe samples as reported in the 1986 and 1993 Nassau County Reports, the 1994 and 1996 NYSDEC PSA Reports, and the 1996 NYSDEC Focused RI Report. Also supplemented with historic analytical results maintained by the Nassau County DPW Water Management Unit's for the County's monitoring well network.

All values for RANGE are presented in units of micrograms per liter (µg/L)

On-Site
(150 Fulton Avenue)

Upper Glacial Aquifer (~45'-85')

Magothy Aquifer Samples (> ~ 90')

Monitoring Well Samples

Geoprobe Samples

Monitoring Well Samples

Geoprobe Samples

FoD
RANGE FoD RANGE FoD RANGE FoD RANGE
tetrachloroethene (PCE)
2/2
2,100 - 7,900 24/24 50 - 24,000   NO DATA   NO DATA
trichloroethene (TCE)
1/2
<10 - 23
16/24
<2 - 110
1,1,1-trichloroethane (TCA)
0/2
<10
7/24
<2 - 230
c/t-1,2-dichloroethene (total)
1/2
<5 - 7 0/24 <4
  NO DATA   NO DATA
1,1-dichloroethene
0/2
<10
2/22
<6 - 25
1,1-dichloroethane
0/2
<10
2/22
<4 - 18
1,2-dichloroethane
0/2
<10
0/22
<10
vinyl chloride
0/2
<10 0/24 <2   NO DATA   NO DATA
carbon disulfide
1/2
<10 - 370
1/17
<5 - 5
ethyl benzene
0/2
<10
0/17
<10

Off-Site,
Within the GCPIA

Upper Glacial Aquifer (~45'-80')

Magothy Aquifer Samples (~90'- 220')

Monitoring Well Samples

Geoprobe Samples

Monitoring Well Samples

Geoprobe Samples

FoD RANGE FoD RANGE
FoD
RANGE
FoD
RANGE
tetrachloroethene (PCE) 60/64 <1 - 50,000 103/133 <2 - 85,000

3/3

145 - 7,100

1/1

76

trichloroethene (TCE) 61/64 <1 - 3,100 83/133 <2 - 5,500
1/3
<2 - 2.9 1/1 2.6
1,1,1-trichloroethane (TCA) 39/64 <0.37 - 260 63/133 <2 - 260
1/3
<2 - 2 0/1 <2
c/t-1,2-dichloroethene (total) 38/57 <1 - 3,700 34/133 <4 - 2,800
2/3
<5 - 5

0/1

<4

1,1-dichloroethene 1/20 <4 - 4 0/13 <6
0/3
<10 0/1 <6
1,1-dichloroethane 1/16 <6 - 6 1/13 <4 - 4.4
0/3
<10 0/1 <4
1,2-dichloroethane 0/7 <10 0/13 <10
0/3
<10 0/1 <10
vinyl chloride 0/22 <0.5 - <500 3/133 <2 - 220
0/3
<10

0/1

<2

carbon disulfide 1/7 <10 - 140 0/13 <5
0/3
<10 0/1 <5
ethyl benzene 1/18 <3 - 12 0/13 <10
0/3
<10 0/1 <10

Off-Site,
Beyond the GCPIA
(All Samples from Monitoring Wells)

Upper Glacial Aquifer

Magothy Aquifer Samples

(~30'-80')

Shallow (~85'- 220')

Deep (400' - 405')

FoD

RANGE

FoD

RANGE

FoD

RANGE

tetrachloroethene (PCE) 60/104 <1 - 29,000

20/25

<1 - 440

1/11

<0.2 - 0.2

trichloroethene (TCE) 39/104 <1 - 830
17/25
<1- 261
3/11
<0.5 - 12.2
1,1,1-trichloroethane (TCA) 38/104 <1 - 429
14/25
<0.5 - 78
1/11
<1 - 2.8
c/t-1,2-dichloroethene (total) 16/10 <1 - 620
14/23
<2 - 21

0/2

<1

1,1-dichloroethene 6/71 <0.5 - 12.4
2/19
<0.5 - 4.2
0/2
<1
1,1-dichloroethane 8/70 <0.5 - 760
6/19
<0.2 - 1.7
0/2
<1
1,2-dichloroethane 4/64 <0.5 - 4.9
1/19
<0.5 - 7.1
0/2
<1
vinyl chloride 0/72 <0.5 - <40
0/24
<2 - <40

0/9

<1

carbon disulfide 0/2 <10
0/1
<0.5
-
NA
ethyl benzene 1/70 <0.5 - 5
0/19
<0.5
0/11
<1

FoD = Frequency of Detection: # Detections/ # Analyses
NA = Not Analyzed


TABLE 7. SUMMARY OF MONITORING RESULTS FOR PUBLIC WATER SUPPLY WELLS IN 150 FULTON AVENUE/GCPIA STUDY AREA

Summary of VOC Results from Nassau County Department of Health, Bureau of Water Supply Protection, database of Monitoring results through December 1997. Additional information from NCDH, 1996.

All analyses for PCE, TCE, and TCA are included in the following tabulation of historic data. For associated compounds (such as 1,1-DCE or vinyl chloride), analyses are tabulated only if the compound was detected in a given well. Occasionally, other VOCs appeared in the wells (such as trihalomethanes and carbon tetrachloride and, less frequently, toluene and ethyl benzene), usually at concentrations below current drinking water standards. These are not tabulated here as there is no indication that the compounds are associated with contamination at 150 Fulton Avenue or the GCPIA.

See Table # 8 for Public Health Comparison Values.

All Values for Range are presented in units of micrograms per liter (µg/L)

Mineola Water District
(7 wells serve ~21,500)

Samples Prior to Installation of VOC Removal System

Samples Since Installation of VOC Removal System

Pre-Treated (from Well)

Treated (to Community)

Well N-3185 (# 4) FoD RANGE * FoD RANGE FoD RANGE
tetrachloroethene (PCE)

27/31

<1.0 - 17

70/73

<1.0 - 63

1/59

<0.5 - 1.0

trichloroethene (TCE)
25/33
<1.0 - 55
68/73
<0.5 - 83
9/59
<0.5 - 6.0
1,1,1-trichloroethane (TCA)
7/32
<1.0 - 2.0
9/73
<0.5 - 1.0
0/59
<0.5
c/t-1,2-dichloroethene

0/6

<5.0

1/71

<0.5 - 0.6

0/59
<0.5
1,1-dichloroethene
1/7
<1.0 - 1.0
9/72
<0.5 - 1.0
0/59
<0.5
1,2-dichloroethane
2/7
<3.0 - 3
15/71
<0.5 - 3.0
0/58
<0.5

FoD = Frequency of Detection: # Detections / # Analyses

* The first VOC samples from Well 3185 (circa ~1977) contained concentrations of PCE and TCE at approximately 10 µg/L and 6 µg/L, respectively. This suggests earlier exposures to VOCs, perhaps at similar concentrations. Although this Well is categorized in summaries of GCPIA-related contamination (because of proximity to the GCPIA), the well is slightly upgradient from the GCPIA, particularly from 150 Fulton Avenue. Consequently, the source of contamination is unknown.

Garden City Park
Water District
(10 wells serve ~21,000)

Samples Prior to Installation of VOC Removal System

Samples Since Installation of VOC Removal System

Pre-Treated (from Well)

Treated
(to Community)

Well N-2565 (# 3) FoD RANGE * FoD RANGE FoD RANGE
tetrachloroethene (PCE) 15/15

14-28

 

N/A (Well no longer used)

 

N/A

trichloroethene (TCE) 0/22
<0.5
1,1,1-trichloroethane (TCA) 2/22
<0.5-1.9
Well N-8409 (# 9) FoD RANGE * FoD RANGE FoD RANGE
tetrachloroethene (PCE) 8/14

<1.0-18

25/25

25-90

1/14

<0.5-0.6

trichloroethene (TCE) 13/23
<1.0-77
25/25
46-110
6/14
<0.5-2.0
1,1,1-trichloroethane (TCA) 0/23
<0.5
12/25
<0.5-12
0/14
<0.5
c/t-1,2-dichloroethene 0/16

<0.5

24/25

<1.0-2.5

0/14

<0.5

1,1-dichloroethene 0/18
<0.5
8/25
<0.5-12
0/14
<0.5

FoD = Frequency of Detection: # Detections / # Analyses
N/A = Not Applicable

* Well 2565 has not been used since 1968 because of nitrates. The first VOC samples (1977) showed PCE at concentrations of approximately 25-28 µg/L; it is unknown if any VOC exposure occurred before 1968. Well 8409 had only traces (<3 µg/L) of VOCs until 1985 when concentrations began to increase and eventually exceeded the existing 50 µg/L guideline (in 1988) whereupon the well was shut down. It has been reused since July 1991 with a VOC removal system . The VOC removal system was upgraded 1998.

Garden City Village
(11 wells serve ~22,000)

Samples Prior to Installation of VOC Removal System

Samples Since Installation of VOC Removal System

Pre-Treated (from Well)

Treated (to Community)

Well N-3881 (# 9) FoD RANGE * FoD RANGE FoD RANGE
tetrachloroethene (PCE) 2/15

<1.0-2.0

 

N/A (Well no longer used)

 

N/A

trichloroethene (TCE) 13/20
<1.0-2.0
1,1,1-trichloroethane (TCA) 0/20
<1.0
Well N-5163 (# 12) FoD RANGE * FoD RANGE FoD RANGE
tetrachloroethene (PCE) 9/30

<0.5-2.0

21/23

<0.5-7.6

0/35

<0.5

trichloroethene (TCE) 24/36
<0.5-13
22/23
<0.5-45
3/35
<0.5-0.7
1,1,1-trichloroethane (TCA) 0/36
<0.5
0/23
<0.5
0/35
<0.5
Well N-7058 (# 13) FoD RANGE * FoD RANGE FoD RANGE
tetrachloroethene (PCE) 2/19

<1.0-1.4

80/88

<0.5-10

1/107

<0.5-3.0

trichloroethene (TCE) 18/23
<1.0-19
82/89
<0.5-48
2/107
<0.5-18
1,1,1-trichloroethane (TCA) 0/23
<0.5
0/89
<0.5
0/107
<0.5
Well N-8339 (# 14) FoD RANGE * FoD RANGE FoD RANGE
tetrachloroethene (PCE) 7/15

<1.0-5.0

93/97

<0.5-41

1/108

<0.5-1.2

trichloroethene (TCE) 9/22
<1.0-6.0
80/100
<0.5-120
2/108
<0.5-0.5
1,1,1-trichloroethane (TCA) 0/22
<1.0
1/100
<0.5-6.0
0/108
<0.5
1,2-dichloroethane 0/11

<1.0

1/97

<0.5-1.3

0/108

<0.5

FoD = Frequency of Detection: # Detections / # Analyses
N/A = Not Applicable

* Well 3881 did not contain PCE or TCE during the earliest VOC samples (1977-1979). Low levels of TCE began to appear in 1980, gradually increasing to approximately 20 µg/l of TCE (and traces of PCE) in 1986, whereupon the well was removed from service. Well 5163 did not contain PCE or TCE during the earliest VOC samples (1977-1979). Traces of TCE began to appear in the early 1980's and traces of PCE in the late 1980's. By 1989, when the NYS DOH VOC standard of 5 µg/l became effective, TCE concentrations had increased to slightly above 5 µg/l and the well was removed from service. The well was returned to service in 1994 after VOC removal treatment was added. The earliest VOC samples (1979) from Well 7058 did not contain PCE or TCE. Traces of TCE appeared in the early 1980's and gradually increased to approximately 15 µg/l through 1988 when traces of PCE also began to appear. Treatment for VOC removal was added early in 1989. Well 8339 was also free of detectable VOC contaminants in the earliest samples (1977-1978), but traces of PCE and TCE began to appear in the early 80's. These levels had reached approximately 5 µg/l for each in 1988 when VOC removal began.

Franklin Square Water District
(5 wells serve ~20,000)

Samples Prior to Installation of VOC Removal System

Samples Since Installation of VOC Removal System

Pre-Treated (from Well)

Treated
(to Community)

Well N-3603 (# 1) FoD RANGE * FoD RANGE FoD RANGE
tetrachloroethene (PCE) 0/62

<0.5

 

N/A (No VOC Treatment)

 

N/A

trichloroethene (TCE) 0/62
<0.5
1,1,1-trichloroethane (TCA) 0/62
<0.5
Well N-3604 (# 2) FoD RANGE * FoD RANGE FoD RANGE
tetrachloroethene (PCE) 0/61

<0.5

 

N/A (No VOC Treatment)

 

N/A

trichloroethene (TCE) 0/61
<0.5
1,1,1-trichloroethane (TCA) 1/61
<0.5 - 1.0
Well N-7117 (# 4) FoD RANGE * FoD RANGE FoD RANGE
tetrachloroethene (PCE) 0/36

<0.5

0/33

<0.5

0/26

<0.5

trichloroethene (TCE) 22/36
<0.5-6.0
24/33
<0.5-59
5/26
<0.5-2.0
1,1,1-trichloroethane (TCA) 0/36
<0.5
5/33
<0.5-2.2
1/26
<0.5-0.6
1,1-dichloroethene 0/29

<0.5

4/33

<0.5-1.8

2/26

<0.5-0.6

1,2-dichloroethane 0/25
<0.5
0/33
<0.5
1/26
<0.5-0.5
Well N-8818 (# 5) FoD RANGE * FoD RANGE FoD RANGE
tetrachloroethene (PCE) 0/26

<0.5

1/40

<0.5-7.2

0/24

<0.5

trichloroethene (TCE) 26/26
3.0-10
31/40
<0.5-82
4/24
<0.5-3.0
1,1,1-trichloroethane (TCA) 1/26
<0.5-1.0
4/40
<0.5-1.4
1/24
<0.5-0.6
c/t-1,2-dichloroethene 1/20

<0.5-0.6

0/40

<0.5

0/24

<0.5

1,1-dichloroethene 1/22
<0.5-9.5
3/40
<0.5-1.1
1/24
<0.5-0.5

FoD = Frequency of Detection: # Detections / # Analyses
N/A = Not Applicable

* Wells 3603 and 3604, though in the study area, meet drinking water standards without VOC Removal. Well 7117 has had relatively low levels (<10 µg/L) of TCE on and off since about 1979. Well 8818 had approximately 6 µg/L of TCE (consistently) during the earliest VOC samples (~1977), and probably before that time.

Water Authority of Western Nassau *
(26 wells serve ~85,000)

Samples Prior to Installation of VOC Removal System

Samples Since Installation of VOC Removal System

Pre-Treated (from Well)

Treated
(to Community)

Well N-0693 (# 15D) FoD RANGE ** FoD RANGE FoD RANGE
tetrachloroethene (PCE) 17/44

<0.5 - 9.2

 

N/A (Wells no longer used)

 

N/A

trichloroethene (TCE) 4/50
<0.5 - 4.0
1,1,1-trichloroethane (TCA) 3/48
<0.5 - 1.0
1,2-dichloroethane 1/45

<0.5 - 3.0

 

N/A

 

N/A

Well N-4077 (# 35)

FoD

RANGE **

FoD

RANGE

FoD

RANGE

tetrachloroethene (PCE) 9/16 <1.0 - 19 6/122 <0.5 - 2.0 3/86 <0.5 - 2.8
trichloroethene (TCE) 12/18 <1.0 - 37 25/122 <0.5 - 27 8/86 <0.5 - 13
1,1,1-trichloroethane (TCA) 6/18 <1.0 - 4.0 6/122 <0.5 -13 3/86 <0.5 - 7.0
1,1-dichloroethene 2/11 <1.0 - 1.0 4/121 <0.5 - 2.0 1/86 <0.5 -3.0
1,2-dichloroethane 1/10 <1.0 - 1.0 0/114 <0.5 0/77 <0.5
Well N-4298 (# 35A) FoD RANGE ** FoD RANGE FoD RANGE
tetrachloroethene (PCE) 1/5 <1.0 - 1.0 97/127 <0.5 - 3.0 1/113 <0.5 - 0.5
trichloroethene (TCE) 4/5 <2.0 - 21 142/152 <0.5 - 34 35/115 <0.5 - 3.7
1,1,1-trichloroethane (TCA) 3/5 <1.0 - 5.0 108/152 <0.5 - 15 2/115 <0.5 - 1.0
c/t-1,2-dichloroethene 0/5 <25 1/140 <0.5 - 0.5 0/115 <0.5
1,1-dichloroethene 0/5 <4 79/148 <0.5 - 5.0 0/115 <0.5
1,1-dichloroethane   NA 3/152 <0.5 - 1.0 0/109 <0.5
1,2-dichloroethane 1/5 <10 - 12 1/143 <0.5 - 1.0 0/115 <0.5
 

FoD = Frequency of Detection: # Detections / # Analyses
N/A = Not Applicable
NA = Not Analyzed

 

Water Authority of Western Nassau *
(26 wells serve ~85,000)

Samples Prior to Installation of VOC Removal System

Samples Since Installation of VOC Removal System

Pre-Treated (from Well)

Treated
(to Community)

Well N-5155 (# 44) FoD RANGE ** FoD RANGE FoD RANGE
tetrachloroethene (PCE) 6/40

<0.5 - 12

1/54

<0.5 - 0.8

0/36

<0.5

trichloroethene (TCE) 15/46

<0.5 - 14.9

1/54

<0.5 - 16

0/36

<0.5

1,1,1-trichloroethane (TCA) 0/46

<0.5

0/54

<0.5

0/36

<0.5

c/t-1,2-dichloroethene 1/42

<0.5 - 1.0

0/54

<0.5

0/36

<0.5

Well N-5156 (# 44A) FoD RANGE ** FoD RANGE FoD RANGE
tetrachloroethene (PCE) 14/41 <0.5 - 5.0 19/64 <0.5 - 0.7 0/49 <0.5
trichloroethene (TCE) 34/44 <0.5 - 21 53/64 <0.5 - 77 1/49 <0.5 - 6.3
1,1,1-trichloroethane (TCA) 2/44 <0.5 - 2.0 0/64 <0.5 0/49 <0.5
Well N-6744 (# 44B) FoD RANGE ** FoD RANGE FoD RANGE
tetrachloroethene (PCE)
20/85
<0.5 - 69
  N/A (No treatment; well samples have met VOC standards since 1988)   N/A
trichloroethene (TCE) 17/99 <0.5 - 4.0
1,1,1-trichloroethane (TCA) 6/99 <0.5 - 10
c/t-1,2-dichloroethene 1/88 <0.5 - 1.0   N/A   N/A
1,1-dichloroethene 1/88 <0.5 - 1.1
Well N-6745 (# 44C) FoD RANGE ** FoD RANGE FoD RANGE
tetrachloroethene (PCE) 16/51 <0.5 - 2.8 21/22 <0.5 - 1.8

0/24

<0.5

trichloroethene (TCE) 23/57 <0.5 - 7.6 21/22 <0.5 - 7.9

0/24

<0.5
1,1,1-trichloroethane (TCA) 1/56 <0.5 - 1.0 0/22 <0.5

0/24

<0.5

FoD = Frequency of Detection: # Detections / # Analyses
N/A = Not Applicable

 

Water Authority of Western Nassau *
(26 wells serve ~85,000)

Samples Prior to Installation of VOC Removal System

Samples Since Installation of VOC Removal System

Pre-Treated (from Well)

Treated
(to Community)

Well N-7649 (# 57) FoD RANGE ** FoD RANGE FoD RANGE
tetrachloroethene (PCE) 14/17 <1.0 - 47 127/136 <0.5 - 31 4/141 <0.5 - 5.0
trichloroethene (TCE) 22/23 <1.0 - 56 158/161 <0.5 - 250 95/143 <0.5 - 12
1,1,1-trichloroethane (TCA) 1/24 <1.0 - 1.0 90/161 <0.5 - 14 0/143 <0.5
c/t-1,2-dichloroethene 0/6 <1.0 88/122 <0.5 - 9.1 0/140 <0.5
1,1-dichloroethene 1/16 <1.0 - 1.0 80/161 <0.5 - 5.5 0/143 <0.5
1,1-dichloroethane 0/16 <1.0 0/149 <0.5 0/137 <0.5
1,2-dichloroethane 0/16 <1.0 45/160 <0.5 - 1.4 0/142 <0.5
vinyl chloride 0/7 <1.0 79/149 <0.5 - 2.1 0/137 <0.5
Well N-7650 (# 57A) FoD RANGE ** FoD RANGE FoD RANGE
tetrachloroethene (PCE) 5/19 <1.0 - 9.0 93/120 <0.5 - 8.4 1/153

<0.5 - 1.5

trichloroethene (TCE) 18/20 <4.0 - 70 154/167 <0.5 - 140 47/154

<0.5 - 5.4

1,1,1-trichloroethane (TCA) 1/21 <1.0 - 1.0 3/167 <0.5 - 4.4 0/155

<0.5

c/t-1,2-dichloroethene 3/5

<1.0 - 4.0

56/97

<0.5 - 6.0

0/153

<0.5

1,1-dichloroethene 0/10

<1.0

0/166

<0.5

1/155

<0.5 - 1.0

1,1-dichloroethane 0/10

<1.0

1/167

<0.5 - 2.0

0/155

<0.5

1,2-dichloroethane 0/8

<1.0

1/158

<0.5 - 1.0

0/149

<0.5

vinyl chloride 0/5

<1.0

1/158

<0.5 - 1.0

0/150

<0.5

FoD = Frequency of Detection: # Detections / # Analyses
N/A = Not Applicable

* The 26 supply wells operated by the Water Authority of Western Nassau (including the nine wells within the study area), as well as the distribution area served by the Authority, were formerly part of the larger Jamaica Water Supply Company. Prior to 1996, the Jamaica Water Supply Company served the 85,000 residents of the present Water Authority and an additional 45,000 residents in the adjoining County of Queens. The distribution systems shared connections, though not necessarily water, between 1986 and 1996. Several interconnections remain, however, these are only for emergency use.

** Well 0693 is a shallow well no longer in use. Early VOC samples contained PCE at concentrations less than 5 µg/L, the current drinking water standard. For the most part, concentrations of PCE were < 2 µg/L from 1979 through 1993, when the well was removed from service. TCE and TCA during this period were usually less than 1 µg/l. In 1990, PCE concntrations rose to 9.2 µg/L and then decreased to about 2 µg/L. The earliest VOC samples (~1977-1978) from Well 4077 averaged approximately 8 µg/L of TCE and less than 2 µg/L each of PCE and TCA. No analyses contained individual VOCs at concentrations exceeding 50 µg/L prior to commencement of VOC treatment in 1985. The current standard of 5 µg/L was exceeded for each of TCE and TCA (13 and 7 µg/L, respectively) in finished water for less than one day during system servicing in December 1985. The operational history of Well 4298 prior to 1985 is unclear, although the well was apparently not used between 1977 and 1985, a period for which no VOC analyses were performed. It appears the well may have operated for one-half of 1985 without VOC removal, during which time PCE, TCE, and TCA averaged approximately <1, 8, and 2.3 µg/L, respectively. The contaminant 1,1-dichloroethane may also have been present at approximately 7 µg/L during that time. Present concentrations of PCE, TCE, and TCA in untreated water are approximately 2, 10, and 3 µg/L, respectively. No concentrations of these chemicals in treated water have been detected at levels exceeding 5 µg/L since treatment began in 1985.

The earliest VOC samples (1977-1979) from Well 5155 revealed concentrations of PCE at about 5 µg/L with no TCE or TCA. While TCE remained generally non-detected through the 1980s, TCE concentrations averaged approximately 7 µg/L for a two-year period of 1991-1992. Since installation of VOC Removal in 1992, untreated water has been virtually clear of the contaminants of concern and there have been no detections in treated water. The earliest VOC samples of Well 5156 were free of the contaminants of concern, PCE and TCE concentrations each averaged about 1 to 2 µg/L in the early 1980s, and then TCE concentrations increased to approximately 8 µg/L in 1986-1987. Concentrations of TCE averaged approximately 9 µg/L between 1988 and 1991. VOC Removal treatment was added in 1992. Presently, concentrations of TCE in untreated water average about 17 µg/L with no PCE or TCA. There has been only one detection of any of these VOCs in treated water since 1992: TCE at 6.3 µg/L. A subsequent sample collected two weeks later contained no detectable TCE.

The earliest VOC samples (1978-1979) in Well 6744 contained PCE at approximately 13 µg/L with one "spike" of 69 µg/L in June 1979. The PCE concentrations decreased to about 2 µg/L by 1984. TCE appeared at detectable concentrations of less than 5 µg/L between 1990 and 1992. Neither of these VOCs have been detected in monthly samples since about mid-1992. The well is used without treatment. Well 6745 had occasional detections of PCE and TCE at concentrations less than 3 µg/L prior to 1989. Monthly samples between 1989 and 1992 had seven detections of TCE greater than the 5 µg/L drinking water standard; none of these was greater than 8 µg/L. Although VOC Removal was available at the well in 1992, the treatment was used only occasionally until 1995. The monitoring results did not indicate any exceedances of 5 µg/L for the contaminants of concern during this time. Present concentrations in untreated water are approximately 1 and 3 µg/L for PCE and TCE, respectively. There have been no detections in treated water since 1995.

The earliest VOC samples (1977-1980) from Well 7649 contained PCE and TCE at about 4 and 8 µg/L, respectively. These concentrations increased through 1983, averaging approximately 8 and 28 µg/L for PCE and TCE. VOC Removal treatment was added in 1984. Since that time there have been many detections of TCE, some of which were approximately 10 - 12 µg/L. Since about mid-1989, there have been no detections greater than 5 µg/L in treated water. Present concentrations of PCE, TCE, and TCA in untreated water from Well 7649 are approximately 25, 200, and 4 µg/L, respectively. Additionally, concentrations of cis-1,2-dichloroethene, , 1,1-dichloroethene, 1,1-dichloroethane, and vinyl chloride are approximately 7, 5, 1.2, and 1.0 µg/L, respectively. These latter compounds began appearing in the well, with regularity, in about 1991 and the concentrations have appeared to be consistent throughout the past six or seven years of monthly analytical data. The earliest VOC samples for Well 7650 contained PCE and TCE at approximately 2 and 10 µg/L, respectively. Between 1981 and 1985, these concentrations averaged approximately 1 µg/L for PCE and 27 µg/L for TCE. VOC Removal was added in 1985. Between 1985 and 1988, there were many detections of TCE in treated water though none exceeded 6 µg/L. Since 1989, there have only been four detections, all less than 2 µg/L. Untreated water presently contains about 1 µg/L PCE, 25 µg/L TCE, and 1 µg/L of cis- or trans- 1,2-dichloroethene.


Table 8. Water Quality Standards and/or Public Health Assessment Comparison Values that are Exceeded by Contaminants Found in Drinking Water near the 150 Fulton Avenue/Garden City Park Industrial Area Site
[All values in micrograms per liter (µg/L)]


 

Water Quality Standards

     
 

New York State

U.S. EPA

     
       

Comparison Values*

Contaminant Groundwater Drinking Water Drinking Water Cancer Basis** Noncancer Basis**

1,2-dichloroethane 5 5 5 0.38 EPA CPF 210EPA PV
1,1-dichloroethene 5 5 7 0.06 EPA CPF 7EPA LTHA
tetrachloroethene 5 5 5 0.7 EPA CPF 70EPA RfD
1,1,1-trichloroethane 5 5 200 --- --- 140EPA PV
trichloroethene 5 5 5 3.2 EPA CPF 42 EPA PV

*Comparison value determined for a 70 kg adult who drinks 2 liters of water per day

**EPA CPF=EPA Cancer Potency Factor
EPA LTHA=EPA Lifetime Health Advisory
EPA RfD=EPA Reference Dose
US EPA, 1984=US EPA National Primary Drinking Water Regulations. Volatile Synthetic Chemicals. Proposed Rulemaking. Federal Register 49 (114): 24330-24352.
EPA PV = Provisional Value from US EPA Superfund Technical Support Center; National Center for Environmental Assessment.



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