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PETITIONED PUBLIC HEALTH ASSESSMENT
CABOT-WROUGHT PRODUCTS - DIVISION OF CABOT CORPORATION
(a/k/a NGK METALS/CABOT BERYLCO, INCORPORATED)
MUHLENBERG, BERKS COUNTY, PENNSYLVANIA


APPENDIX B

Table 1. Summary Demographic Information for Selected Areas Near the NGK Metals Facility Site, Berks County, PA

Within 1-mile of the facility Within 2-miles of the facility Berks County
Persons 4,927 14,686 336,523
Race
White 4,849 (98%) 14,441 (98%) 314,561 (93%)
Other 78 (2%) 245 (2%) 21,962 (7%)
Age
1 to 6 years of age 309 (6%) 956 (7%) 31,602 (9%)
7 to 14 years of age 366 (7%) 1,170 (8%) 34,312 (10%)
15 to 44 years of age 1,832 (37%) 5,427 (37%) 149,968 (45%)
45 to 64 years of age 1,269 (26%) 3,931 (27%) 68,115 (20%)
65 years of age and older 1,151 (23%) 3,202 (22%) 52,526 (16%)
Females 15 to 44 years of age 910 (18%) 2,693 (18%) 75,136 (22%)
Total Housing Units 2,174 6,090 134,482
Occupied Housing Units 2,126 (98%) 5,968 (98%) 127,649 (95%)
Owner Occupied 1,719 (81%) 5,097 (85%) 94,336 (74%)
Renter Occupied 407 (19%) 871 (15%) 33,313 (26%)
Median Housing Value $72,488 $79,565 $81,800
Square Mile Area 3.13 12.50 859.22
Population Density 1,576/sq. mile 1,175/sq. mile 391.7/sq. mile

Source: U.S. Bureau of the Census. 1991. Census of Population and Housing, 1990: Summary Tape File 1B (Pennsylvania) [machine-readable data files]/ prepared by the Bureau of the Census. Washington: The Bureau [producer and distributor].

Table 2. Summary of the Maximum Concentration of Contaminants Found in On-site Subsurface Soil

Contaminant Maximum Concentration
mg/kg
Date Comparison Value
mg/kg Source
Antimony 36.9 1989 300 RMEG
Arsenic 179 1989 0.4 CREG
Barium 185 1989 50000 RMEG
Beryllium 10900 1989 0.2 CREG
Cadmium 639 1989 100 EMEG
Chromium (total) 14700* 1989 4000 RMEG
Chromium (VI) NA
4000 RMEG
Copper 191000E* 1989 38000 EPAIII
Lead 932N 1989 NONE
Manganese 1220 1989 4000 RMEG
Nickel 290 1989 20000 EPAIII
Selenium 47.7N 1989 2000 EMEG
Thallium 2B 1989 60 RMEG
Vanadium 74.5 1989 7200 EPAIII
Fluoride 10700 1989 40000 RMEG
Nitrate 71.9 1989 1000000 RMEG
1,1-Dichloroethene NA
1 CREG
Tetrachloroethene NA
10 CREG
Trichloroethene NA
60 CREG
1,1,1-Trichloroethane NA
92000 EPAIII
Vinyl chloride NA
10 EMEG

Reference:   1
Note:   bolding shows contaminants of concern for on-site subsurface soil
E   reported value is estimated because of the presence of interference
N   spiked sample recovery not within control limits
*   duplicate analysis not within control limit
NA   not analyzed

Table 3. Summary of the Maximum Concentration of Contaminants Analyzed in On-site Groundwater
Contaminant Shallow Well
µg/L
Date Deep Well
µg/L
Date Comparison Value
µg/L Source
Antimony 36.8B 12/89 23.5B 12/89 3 LTHA
Arsenic 7.2B 5/90 13 12/89 0.02 CREG
Barium 755 12/89 1010 12/89 700 RMEG
Beryllium 661 6/91 551 5/90 0.008 CREG
Cadmium 53.4 5/90 ND
5 RMEG
Chromium (total) 2550 12/89 1420 12/89 50 RMEG
Chromium (VI) 630 12/89 1360 5/90 50 RMEG
Copper 891 5/90 194 12/89 1300 MCL
Lead 66.4 12/89 66.3 12/89 15 MCLA
Manganese 9270 12/89 12500 12/89 50 RMEG
Nickel 337 12/89 314 12/89 100 LTHA
Selenium 50.3 5/90 6.3BS 12/89 20 IEMEG
Thallium ND
2.8 12/89 0.4 LTHA
Vanadium 149 12/89 241 12/89 20 LTHA
Fluoride 85000 12/89 160000 5/90 600 RMEG
Nitrate 524000 5/90 37000 12/89 10000 MCL
1,1-Dichloroethene 33 5/90 8 12/89 0.06 CREG
Tetrachloroethene 5 5/90 4J 5/90 0.7 CREG
Trichloroethene 13 12/89 5 5/90 3 CREG
1,1,1-Trichloroethane 410 6/91 33 6/91 200 LTHA
Vinyl chloride 46 5/90 31 5/90 0.2 EMEG

References:   1 (for samples dated 12/89 & 5/90), 7 (for samples dated 6/91)
Note:   bolding shows contaminants of concern for on-site groundwater
B   indicates value below laboratory reporting limit but above instrument detection limit
J   indicates estimated value below laboratory reporting limit but above instrument detection limit
S   indicates value was determined by the method of standard additions
ND   not detected

Table 4a. Summary of the Maximum Concentration of Contaminants Analyzed in Off-site Groundwater
Contaminant Private Well 1 Private Well 2 Comparison Value
µg/L Date µg/L Date µg/L Source
Antimony NA
NA
3 LTHA
Arsenic NA
NA
0.02 CREG
Barium NA
NA
700 RMEG
Beryllium 5.3 6/91 <2 7/94 0.008 CREG
Cadmium <5 12/90 <5 5/91 5 RMEG
Chromium (total) 242 6/91 52.7 6/91 50 RMEG
Chromium (VI) 281J 6/91 43.9 6/91 50 RMEG
Copper 8.6B 6/91 35 7/94 1300 MCL
Lead <50 12/90 <50 5/91 15 MCLA
Manganese NA
NA
50 RMEG
Nickel <40 12/90 <40 12/90 100 LTHA
Selenium NA
NA
20 IEMEG
Thallium NA
NA
0.4 LTHA
Vanadium NA
NA
20 LTHA
Fluoride 1700 12/90 350 6/91 600 RMEG
Nitrate 8670 6/91 5720 6/91 10000 MCL
1,1-Dichloroethene 2 12/90 <1 7/94 0.06 CREG
Tetrachloroethene 10 6/91 <1 7/94 0.7 CREG
Trichloroethene 4J 6/91 <1 7/94 3 CREG
1,1,1-Trichloroethane 15 6/91 6 6/91 200 LTHA
Vinyl chloride <1 12/90 <1 7/94 0.2 EMEG

References:   5 (for samples dated 5/91), 6 (for samples dated 6/91), 11 (for samples dated 7/94), and 15 (for samples dated 12/90)
Note:   bolding shows contaminant concentrations that exceed comparison values
B   estimated concentration, detected below contract required limit but above instrument detection limit
J   estimated value
<   indicates that the contaminant was not detected at the reported value
NA   not analyzed

Table 4b. Summary of the Maximum Concentration of Contaminants Analyzed in Off-site Groundwater
Contaminant Private Well 3 Reading Crest Well Comparison Value
µg/L Date µg/L Date µg/L Source
Antimony NA
<1 8/90 3 LTHA
Arsenic NA
1 8/90 0.02 CREG
Barium NA
47 8/90 700 RMEG
Beryllium <5 12/90 11 8/90 0.008 CREG
Cadmium <5 12/90 6 8/90 5 RMEG
Chromium (total) <50 12/90 139 10/83 50 RMEG
Chromium (VI) <20 12/90 130 10/83 50 RMEG
Copper 40 12/90 72 8/90 1300 MCL
Lead <50 12/90 <20 8/90 15 MCLA
Manganese NA
29 8/90 50 RMEG
Nickel <40 12/90 27 8/90 100 LTHA
Selenium NA
463 8/90 20 IEMEG
Thallium NA
<1 8/90 0.4 LTHA
Vanadium NA
<1 8/90 20 LTHA
Fluoride 300 12/90 1700 8/90 600 RMEG
Nitrate NA
6050 8/90 10000 MCL
1,1-Dichloroethene <1 12/90 8.1 8/90 0.06 CREG
Tetrachloroethene <1 12/90 0.9 8/90 0.7 CREG
Trichloroethene <1 12/90 1.9 8/90 3 CREG
1,1,1-Trichloroethane <1 12/90 25.7 8/90 200 LTHA
Vinyl chloride <1 12/90 <0.5 8/90 0.2 EMEG

References: 1, and 16 (for samples dated 8/90), 11 (for samples dated 12/90), 13 (for samples dated 10/83)
Note:   bolding shows contaminant concentrations that exceed comparison values
<   indicates that the contaminant was not detected at the reported value
NA   not analyzed

Table 4c. Summary of the Maximum Concentration of Contaminants Analyzed in Off-site Groundwater
Contaminant P-1
µg/L
BP-1
µg/L
MW24
µg/L
MW25
µg/L
MW26
µg/L
Comparison Value
µg/L Source
Antimony NA NA NA NA NA 3 LTHA
Arsenic NA NA NA NA NA 0.02 CREG
Barium NA NA NA NA NA 700 RMEG
Beryllium 63.3 ND 6.3 3.14B 8.4 0.008 CREG
Cadmium 12.3 ND ND ND ND 5 RMEG
Chromium (total) 43.1 ND 18 ND 5.4B 50 RMEG
Chromium (VI) 100 ND ND ND ND 50 RMEG
Copper 478 104 58.9 ND 13.7B 1300 MCL
Lead NA NA NA NA NA 15 MCLA
Manganese NA NA NA NA NA 50 RMEG
Nickel NA NA NA NA NA 100 LTHA
Selenium NA NA NA NA NA 20 IEMEG
Thallium NA NA NA NA NA 0.4 LTHA
Vanadium NA NA NA NA NA 20 LTHA
Fluoride 930 240 120 <100 350 600 RMEG
Nitrate 692 2800 1010 8520 1140 10000 MCL
1,1-Dichloroethene ND ND ND ND ND 0.06 CREG
Tetrachloroethene ND ND ND ND ND 0.7 CREG
Trichloroethene ND ND ND ND ND 3 CREG
1,1,1-Trichloroethane ND ND ND ND ND 200 LTHA
Vinyl chloride NA NA NA NA NA 0.2 EMEG

Reference: 6
Dates:   P-1, BP-1, and MW24 were sampled 6/91; MW25 and MW26 were sampled 8/91
Note:   bolding shows contaminant concentrations that exceed comparison values
B   detected below contract required limit but above instrument detection limit
NA   not analyzed
ND   not detected (detection limit not reported)
P-1
= Piezometer      BP-1 = Berks Products Well      MW = Monitoring Well

Table 5. Summary of Contaminants detected in Off-site Surface Soil Samples
LOCATION ID COMPARISON VALUES FOR CONTAMINANTS (mg/kg) NUMBER OF SAMPLES DATE
0.2 CREG 0.2 CREG 10 pRMEG 10 pRMEG 100 pEMEG
CONCENTRATION RANGE (mg/kg)
Be
(TOTAL)
Be
(SOLUBLE)
Cr
(TOTAL)
Cr+6 Fl
Residence #1 1.3-2.8 NA 23.4-63.5 NA NA 6 10/26/94
Residence #2 <0.5-4.9 NA 7.2-37.1 NA NA 6 10/25/94
Residence #3 1.2-1.9 NA 21.0-29.3 NA NA 6 10/26/94
Residence #4 2.5-4.3 NA 26.3-92.6 NA NA 7 10/25/94
Residence #5 0.5-1.6 NA 10.2-21.8 NA NA 6 10/26/94
Residence #6 1.6-2.3 NA 20.7-45.1 NA NA 7 10/26/94
Residence #7 2.1 NA 15.0 <0.7 10.2 1 11/18/92
UG-1 1.4-2.7 <0.004-0.0054 18.0-22.0 NA 2.0-5.0 3 07/27/94
PA-1 1.8-3.2 <0.004 21.0-31.5 NA 5.0-10.0 3 07/27/94
PA-2 1.6-3.2 <0.004 17.0-20.0 NA 2.0-3.0 3 07/27/94
PA-3 0.8-6.9 <0.004 20.0-23.0 NA 5.0-7.0 3 07/27/94
References: 10 (Residence 7), 11 (UG-1, PA-1, PA-2, PA-3), 12 (Residence 1-6), and 14 (soluble Be)
Be   beryllium
Cr   chromium
Cr+6   hexavalent chromium
Fl   Fluoride
NA   not analyzed
<   indicates that the contaminant was not detected at the reported value

Notes:    1) there is no comparison value for total chromium, the RMEG used in that column is for Cr+6    2) the "p" preceeding RMEG and EMEG denotes "pica child" comparison values    3) bolding shows concentrations or upper ranges that exceed comparison values (residence #7 was analyzed for Cr+6; therefore, the total does not exceed the Cr+6 or Cr+3 [pRMEG 2000 mg/kg] comparison values)

Table 6a. CONTAMINANTS IN LAUREL RUN SURFACE WATER UP AND DOWNSTREAM OF NGK NATIONAL POLLUTANT DISCHARGE ELIMINATION SYSTEM (NPDES) OUTFALL (DATA BASED ON RCRA FACILITY INVESTIGATION)
Contaminant US-1
µg/L
DS-1
µg/L
DS-2
µg/L
DS-3 µg/L Comparison Value µg/L
12/89 5/90 6/91 12/89 5/90 6/91 12/89 5/90 6/91 6/91
Barium 24.9 33.7B NA 26.6 33.2B NA 25.5B 34.6B NA NA 700 RMEG
Beryllium ND ND <0.2 2.7B ND <0.2 1.5B ND 0.37B 0.92B 0.008 CREG
Chromium NA NA <5.3 NA NA <5.3 NA NA 10.2 41.8 50 RMEG
Chromium VI ND ND <10 ND ND <10 ND ND <10 NA 50 RMEG
Copper 4.7B 17.1B <2.5 80.8 23.8B 20.8B 41.6 29.9 26.5 3.3B 1300 MCL
Lead ND 2.1B NA ND 1.8B NA 1.1B 1.4B NA NA 15 MCLA
Manganese 4.6B 6.1B NA 5.2B 6.7B NA 6.4B 6B NA NA 50 RMEG
Nickel ND 6B NA ND ND NA ND 18.2B NA NA 100 LTHA
Nitrate 2360 1690 1480 2730 1790 1630 2670 1880 1660 4140 10000 MCL
Fluoride 130 120 120 220 190 210 160 210 220 870 600 RMEG
1,1-dichloroethene ND ND NA ND ND NA ND ND NA NA 0.06 CREG
Dichloromethane ND ND 6 ND ND <5 ND ND 45 <5 5 CREG
PCE ND ND NA 1B ND NA ND ND NA NA 0.7 CREG
Trichloroethene ND ND NA ND ND NA ND ND NA NA 3 CREG
1,1,1-trichloroethane ND ND NA ND ND NA ND ND NA NA 200 LTHA
Vinyl Chloride ND ND NA ND ND NA ND ND NA NA 0.2 EMEG

NA = not analyzed   ND = not detected (detection limit not reported)   < = not detected at the reported value   B = indicates value below laboratory reporting limit but above instrument detection limit   PCE = tetrachloroethene   US-1 = upstream of NGK   DS-1 = adjacent NGK but just downstream of NPDES   DS-2 = approximately 0.1-0.2 miles downstream of NPDES DS-3 = approximately 1.5 miles downstream of NGK
Notes: (1) bolding shows contaminants of concern for this medium   (2) contaminants are summarized in this table if they were selected as contaminants of concern in one of the on-site media or if they exceed the comparison value in this medium   (3) on-site contaminants of concern which are not listed in this table were not analyzed for   (4) references: 1 (for 12/89 & 5/90 samples) and 6 (for 6/91 samples)

Table 6b. CONTAMINANTS IN LAUREL RUN SURFACE WATER UP AND DOWNSTREAM OF NGK (DATA BASED ON STREAM SURVEYS)
Contaminant Stream Survey 5/13/81
µg/L
Stream Survey 1/26/89
µg/L
ComparisonValue
µg/L
US1 DS1 DS2 US01 DS01 DS02 DS03
Arsenic NA NA NA <4 <4 <4 <4 0.02 CREG
Barium NA NA NA 36 34 54 40 700 RMEG
Beryllium 1000 2500 1000 <1 4 <1 <1 0.008 CREG
Cadmium 1 1 1 <0.2 <0.2 0.6 <0.2 5 RMEG
Chromium 10 10 10 <50 <50 <50 <50 50 RMEG
Chromium VI NA NA NA <10 <10 <10 <26 50 RMEG
Copper 10 100 20 <10 102 28 33 1300 MCL
Lead 10 10 10 5.6 15.8 36 <4 15 MCLA
Manganese 340000 210000 450000 11 22 46 <10 50 RMEG
Nickel NA NA NA <25 <25 <25 <25 100 LTHA
Selenium NA NA NA <6 6 <6 <6 20 IEMEG
Nitrate 780 1980 2840 NA NA NA NA 10000 MCL
Fluoride 190 360 460 NA NA NA NA 600 RMEG
References: 18 (for 5/13/81 Stream Survey) and 19 (for 1/26/89 Stream Survey)
NA = not analyzed < = not detected at the reported value
US1 = approximately 0.25 miles upstream of NGK DS1 = approximately 0.2 miles downstream of NGK
DS2 = approximately 2 miles downstream of NGK
US01 = approximately 0.25 miles upstream of NGK
DS01 = approximately 1.5 miles downstream of NGK, but above confluence with unnamed tributary
DS02 = approximately 1.5 miles downstream of NGK, but below confluence with unnamed tributary
DS03 = approximately 2 miles downstream of NGK

Notes: (1) bolding shows contaminants of concern for this medium   (2) contaminants are summarized in this table if they were selected as contaminants of concern in one of the on-site media or if they exceed the comparison value in this medium   (3) on-site contaminants of concern which are not listed in this table were not analyzed

Table 6c. CONTAMINANTS IN LAUREL RUN SURFACE WATER UP AND DOWNSTREAM OF NGK (DATA BASED ON STREAM SURVEYS)
Contaminant Stream Survey 1/13/89
µg/L
Stream Survey 10/15/90
µg/L
Comparison Value
µg/L
US DS US001 US002 US003 DS001 DS002
Arsenic <4 <4 NA NA NA NA NA 0.02 CREG
Barium <500 <500 NA NA NA NA NA 700 RMEG
Beryllium <1 1 1 1 <25 <25 <25 0.008 CREG
Cadmium <0.2 <0.2 NA NA NA NA NA 5 RMEG
Chromium <4 6.1 NA NA <4 <4 <4 50 RMEG
Chromium VI NA NA <10 <10 <10 <10 <10 50 RMEG
Copper <10 46 15 12 <50 66 <50 1300 MCL
Lead <4 <4 NA NA NA NA NA 15 MCLA
Manganese <50 <50 NA NA NA NA NA 50 RMEG
Nickel NA NA <25 <25 NA NA NA 100 LTHA
Nitrate 2180 2900 3150 3140 960 1500 1480 10000 MCL
Fluoride 140 200 NA NA NA NA NA 600 RMEG
References: 21 (for 1/13/89 Stream Survey) and 48 (for 10/15/90 Stream Survey)
NA = not analyzed < = not detected at the reported value
US = approximately 50 meters upstream of NGK NPDES outfall
DS = approximately 120 meters downstream of NGK NPDES outfall
US001 = approximately 3 miles upstream of NGK
US002 = approximately 2 miles upstream of NGK
US003 = approximately 0.1 mile upstream of NGK
DS001 = approximately 30 meters downstream of NGK NPDES outfall
DS002 = approximately 1 mile downstream of NGK

Notes: (1) bolding shows contaminants of concern for this medium   (2) contaminants are summarized in this table if they were selected as contaminants of concern in one of the on-site media or if they exceed the comparison value in this medium   (3) on-site contaminants of concern which are not listed in this table were not analyzed

Table 7. CONTAMINANTS IN WASTEWATER AT THE NGK NATIONAL POLLUTANT DISCHARGE ELIMINATION SYSTEM (NPDES) OUTFALL
Contaminant Individual Sampling of Wastewater Discharge
µg/L
DMR Highest Daily Concentration
12/89-10/92
1/13/89 3/26/91 3/27/91 9/17/91 10/1/91 Conc. µg/L Date
Arsenic <4 NA NA NA NA NA
Barium <500 NA NA NA NA NA
Beryllium 18 21.4 11.3 10 13 80 7/90
Cadmium 0.3 NA 0.32 <10 <10 NA
Chromium 5.1 NA <4 <50 <50 <10
Chromium VI NA NA <1 NA NA 2 12/91
Copper 650 520 305 190 288 2060 8/92
Lead 12.7 129 <4 <50 <50 200 6/91
Manganese <50 NA NA NA NA NA
Nickel NA 84 <25 <25 <25 47 9/91
Nitrate 4360 NA NA NA NA NA
Fluoride 1000 NA 1090 NA NA NA

References: 20 (for 3/26 & 3/27/91 samples), 21 (for 1/13/89 sample), 22 (for 9/17 & 10/1/91 samples), and 23 (for 11/89-10/92 sampling)
NA = not analyzed    < = not detected at the reported value    DMR = Discharge Monitoring Report
Note: DMR values for beryllium, copper, and lead reported here exceed permit requirements (daily discharge) for those time periods reported, but compliance with permit requirements were generally met during the 3 years evaluated.

Table 8. CONTAMINANTS IN LAUREL RUN SEDIMENT UP AND DOWNSTREAM OF NGK NATIONAL POLLUTANT DISCHARGE ELIMINATION SYSTEM (NPDES) OUTFALL (DATA BASED ON RCRA FACILITY INVESTIGATION)
Contaminant US-1
mg/kg
DS-1
mg/kg
DS-2
mg/kg
Comparison Value
mg/kg
12/89 5/90 6/91 12/89 5/90 6/91 12/89 5/90 6/91
Arsenic 0.35B 1B NA 2.1B 0.89B NA 1.6B 1.5B NA 0.4 CREG
Barium 12.2B 22.7B NA 26B 18.4B NA 27.2B 28.8B NA 50000 RMEG
Beryllium 0.36B 0.32B 0.24B 1.2 1.7 2.4 1.3 1.3 1.4 0.2 CREG
Chromium 4.6 9.1 1.1B 7 8.1 14.9 7.4 6.9 5.7 4000 RMEG
Chromium VI NA NA <0.013 NA NA <0.011 NA NA <0.04 4000 RMEG
Copper 2.9B 7.7 3.7 37.3 58.1 163 23.5 32.7 15.9 38000 EPAIII
Lead 45.7 19 NA 21.8 14 NA 14.5 41.3 NA NONE
Manganese 72.1 142 NA 127 205 NA 120 256 NA 4000 RMEG
Nickel 3.5B 2.5B NA 3.5B 2.9B NA 3.8B 3.5B NA 20000 EPAIII
Selenium ND ND NA 1.5B ND NA ND ND NA 2000 EMEG
Vanadium 6.9B 7.1B NA 8.6B 61.3B NA 10.9 8.9B NA 7200 EPAIII
Nitrate 3.24 1.92 <0.972 2.93 2.33 10.2 3.89 6.66 <1.001 1000000 RMEG
Fluoride 6.79 1.05 <0.1 18.6 75.3 <0.1 36.4 1.11 <0.1 40000 RMEG

References: 1 (for 12/89 & 5/90 samples) and 6 (for 6/91 samples)
NA = not analyzed    ND = not detected (detection limit not reported)    < = not detected at the reported value
B = indicates value below laboratory reporting limit but above instrument detection limit
US-1 = upstream of NGK    DS-1 = adjacent NGK but just downstream of NPDES
DS-2 = approximately 0.1-0.2 miles downstream of NPDES
Note: (1) bolding shows contaminants of concern for this medium    (2) contaminants are summarized in this table if they were selected as contaminants of concern in one of the on-site media or if they exceed the comparison value in this medium    (3) on-site contaminants of concern which are not listed in this table were not analyzed

TABLE 9. CONTAMINANTS IN OFF-SITE AIR
YEAR AMBIENT AIR MAXIMUM WEEKLY CONCENTRATIONS FOR YEARS 1979-91 BERYLLIUM (µg/m3) Comparison Value
(CREG)
µg/m3
STATIONS
R1 R2 R3 R4 R5 R6 R7 R8
1979 0.00680 0.00060 0.00090 0.00960 0.00130 0.00200 0.00200 0.00220 0.0004
1980 0.00631 0.000411 0.010181 0.000934 0.002604 0.007191 0.000881 0.00088 0.0004
1981 0.042795 0.000271 0.00161 0.00031 0.000241 0.000181 0.000201 0.000181 0.0004
1982 0.001413 0.00307 0.00265 0.000313 0.000333 0.000333 0.000333 0.000173 0.0004
1983 0.00700 0.000141 0.00816 0.00009 0.00038 0.00007 0.000271 0.000122 0.0004
1984 0.001761 0.00078 0.00233 0.00026 0.00099 0.00055 0.000151 0.00010 0.0004
1985 0.001141 0.008601 0.00186 0.00112 0.001801 0.00104 0.00110 0.001591 0.0004
1986 0.01286 0.000793 0.004706 0.000733 0.002106 0.000783 0.00158 0.005001 0.0004
1987 0.02910 0.00129 0.001902 0.00110 0.00225 0.00093 0.02130 0.00119 0.0004
1988 0.00314 0.000291 0.00197 0.001715 0.00046 0.00039 0.000131 0.00030 0.0004
1989 0.08143 0.02105 0.02046 0.00204 0.00178 0.00122 0.002483 0.00181 0.0004
1990 0.00205 0.00045 0.00078 0.00018 0.00020 0.00031 0.00034 0.00020 0.0004
1991 0.00109 0.00068 0.001627 0.00025 0.00043 0.00056 0.00040 0.00031 0.0004
1992 0.00105 0.00027 0.00076 0.00017 0.00019 0.00018 0.00017 0.000287 0.0004
1993 0.00099 0.000397 0.00062 0.000357 0.00023 0.00020 0.00033 0.00028 0.0004
1994 0.00059 0.00094 0.00119 0.00060 0.00069 0.00094 0.00070 0.00055 0.0004

Reference: 25 Locations of air monitors are in Figure 9    Note: Bolding shows concentrations that exceed the comparison value
Weekly concentrations are based on 7-day samples unless noted as follows:   1 1 day concentration   2 2 day concentration   3 3 day concentration   4 4 day concentration   5 6 day concentration   6 8 day concentration   7 < 7 days were sampled; but actual number of days not reported
Sampling began on 8/1/79 and is reported through the end of 1994

TABLE 10. CONTAMINANTS DETECTED IN AIR AT ON-SITE AND OFF-SITE LOCATIONS
STATION ON-SITE/OFF-SITE SITE AIR DATA SOURCE
DATE µg/m3
BERYLLIUM COMPARISON VALUE CHROMIUM, TOTAL COMPARISON VALUE
RCRA 01 7/2/91 0.00062 0.0004 0.00448 0.00008 8
RCRA 02 7/2/91 0.00042 0.0004 0.00472 0.00008 8
R-1 7/2/91 0.00015 0.0004 0.0063 0.00008 8
RCRA 01 7/9/91 0.00011 0.0004 0.00159 0.00008 8
RCRA 02 7/9/91 0.00023 0.0004 0.00145 0.00008 8
R-1 7/9/91 0.00007 0.0004 0.00199 0.00008 8
RCRA 01 7/16/91 0.00079 0.0004 0.00344 0.00008 8
RCRA 02 7/16/91 0.00034 0.0004 0.00284 0.00008 8
R-1 7/16/91 0.00039 0.0004 0.00399 0.00008 8
RCRA 01 7/23/91 0.00019 0.0004 0.00616 0.00008 8
RCRA 02 7/23/91 0.00017 0.0004 0.00450 0.00008 8
R-1 7/23/91 0.00011 0.0004 0.00827 0.00008 8
RCRA 01 7/30/91 0.00027 0.0004 0.00269 0.00008 8
RCRA 02 7/30/91 0.00038 0.0004 0.00274 0.00008 8
R-1 7/30/91 0.00018 0.0004 0.00512 0.00008 8

Note: Bolding shows values that exceed the CREG comparison values
RCRA 01 = On site    RCRA 02 = On site    R-1 = off site

Table 11. COMPLETED EXPOSURE PATHWAYS
PATHWAY NAME SOURCE ENVIRONMENTAL MEDIA POINT OF EXPOSURE ROUTE OF EXPOSURE EXPOSED POPULATION TIME
Off-site Groundwater NGK Groundwater Private Well 1 and 2 Dermal Contact
Ingestion
Inhalation1
Users of Private Wells 1 and 2 Past
Present2
Future2
On-site Ambient Air NGK Ambient Air On-site and Off-site Around NGK Inhalation On-site Workers Past
Present
Future
Off-site Ambient Air NGK Ambient Air Off-site Around NGK Inhalation Residents and People Working Near NGK Past
Present
Future
Off-site Soil Unknown Soil Public and Private Areas Dermal Contact
Ingestion
Residents and People Working and Recreating Near NGK Past
Present
Future

1 Applies to Private Well 1 only
2 Applies to Private Well 2 only

Table 12. Potential Exposure Pathways
PATHWAY NAME SOURCE ENVIRONMENTAL MEDIA POINT OF EXPOSURE ROUTE OF EXPOSURE EXPOSED POPULATION TIME
On-site Soil NGK Soil On-site Waste Areas Dermal Contact
Ingestion
Inhalation
On-site Workers and Nearby Residents Past
Present
Future
Off-site Groundwater NGK Groundwater Private Well 3 and Use of Wells from within the Contaminant Plume Dermal Contact
Ingestion
Inhalation
Users of Private Well 3 and Groundwater within the Contaminant Plume Past
Present
Future
Off-site Sediment Point and Non-point Discharge Sources Along Laurel Run Sediment Laurel Run Dermal Contact
Ingestion
Users of Laurel Run Past
Present
Future
Off-site Surface Water Point and Non-point Discharge Sources Along Laurel Run Surface Water Laurel Run Dermal Contact
Ingestion
Users of Laurel Run Past
Present
Future
Off-site Biota NGK and Other Air and Surface Water Pollution Sources Fish, Fruits, and Vegetables Laurel Run and areas around NGK and Laurel Run Ingestion Laurel Run Fisheaters and Consumers of Locally Grown Fruits and Vegetables Past
Present
Future
Workers' Clothing NGK Workers' Clothing Residences Dermal Contact
Ingestion
Inhalation
Family Members of Workers Who Were Exposed to Contaminants Past


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