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HEALTH CONSULTATION

Active Soil Gas Data Review

CHILLUM PERC SITE
(a/k/a CHILLUM PERCHLOROETHYLENE)
CHILLUM, PRINCE GEORGES COUNTY, MARYLAND


TABLES

Table 3.

Summary of available active soil vapor data, Chillum perc site, Chillum, Maryland (g/m3)
Media Substance Maximum Average Total # of Samples SL
soil gas deep 1,2-dichloroethene, cis- 2.7 2.45 103 3500
soil gas deep 1,2-dichloroethene, trans-     62 7000
soil gas deep benzene 160 20.975448 158 3100
soil gas deep ethyl benzene 58.3 17.663039 123 22000
soil gas deep misc., see result parameter field     1  
soil gas deep mp-xylene 120 42.516808 123 700000
soil gas deep mtbe 3787.6 147.90943 134 300000
soil gas deep o-xylene 110.9 24.358085 123 700000
soil gas deep perc 4600 456.52020 134 8100
soil gas deep tce 11 6.8809523 103 220
soil gas deep toluene 250 77.225666 123 40000
soil gas deep total xylenes 215.8 62.023362 123 700000
soil gas deep vinyl chloride     103 2800
soil gas shallow 1,1,1-trichloroethane     2 22000
soil gas shallow 1,1,2,2-tetrachloroethane     2 42
soil gas shallow 1,1,2-trichloro-1,2,2-trifluoroethane     2 300000
soil gas shallow 1,1,2-trichloroethane     2 150
soil gas shallow 1,1-dichloroethane     2 5000
soil gas shallow 1,1-dichloroethene     2 2000
soil gas shallow 1,2,4-trichlorobenzene     2 2000
soil gas shallow 1,2,4-trimethylbenzene     2 60
soil gas shallow 1,2-dibromoethane     2 2
soil gas shallow 1,2-dichlorobenzene     2 2000
soil gas shallow 1,2-dichloroethane     2 94
soil gas shallow 1,2-dichloroethene, cis- 8 8 19 350
soil gas shallow 1,2-dichloroethene, trans- 32 32 18 700
soil gas shallow 1,2-dichloropropane     2 40
soil gas shallow 1,3,5-trimethylbenzene     2 60
soil gas shallow 1,3-butadiene     2 8.7
soil gas shallow 1,3-dichlorobenzene     2 1100
soil gas shallow 1,3-dichloropropene, cis-     2  
soil gas shallow 1,3-dichloropropene, trans-     2  
soil gas shallow 1,4-dichlorobenzene     2 8000
soil gas shallow 1,4-dioxane     2  
soil gas shallow 2-butanone 51 28.35 2 10000
soil gas shallow 2-hexanone     2  
soil gas shallow 4-ethyltoluene     2  
soil gas shallow acetone 100 53.25 2 3500
soil gas shallow benzene 38 10.867741 66 310
soil gas shallow benzyl chloride     2 50
soil gas shallow bromodichloromethane     2 140
soil gas shallow bromoform     2 2200
soil gas shallow bromomethane     2 50
soil gas shallow carbon disulfide     2 7000
soil gas shallow carbon tetrachloride     2 160
soil gas shallow chlorobenzene     2 600
soil gas shallow chlorodibromomethane     2 100
soil gas shallow chloroethane     2 100000
soil gas shallow chloroform     2 110
soil gas shallow chloromethane     2 900
soil gas shallow cyclohexane     2  
soil gas shallow dichlorodifluoromethane     2 2000
soil gas shallow dichlorotetrafluoroethane     2  
soil gas shallow ethanol 500 252.95 2  
soil gas shallow ethyl acetate     2 32000
soil gas shallow ethyl benzene 27.1 11.713043 34 2200
soil gas shallow hexachlorobutadiene     2 110
soil gas shallow hexane, n-     2 2000
soil gas shallow isopropanol 170 86.35 2  
soil gas shallow methyl isobutyl ketone     2 800
soil gas shallow methylene chloride     2 5200
soil gas shallow misc., see result parameter field     1  
soil gas shallow mp-xylene 56.1 23.70625 34 70000
soil gas shallow mtbe 241.7 37.308823 44 30000
soil gas shallow n-heptane     2  
soil gas shallow o-xylene 40.1 16.50625 34 70000
soil gas shallow perc 1800 312.64074 46 810
soil gas shallow propene 190 190 2  
soil gas shallow styrene     2 10000
soil gas shallow tce 11 7.2 19 22
soil gas shallow tetrahydrofuran     2  
soil gas shallow toluene 100 43.509375 34 4000
soil gas shallow total xylenes 96.2 35.85 32 70000
soil gas shallow trichlorofluoromethane     2 7000
soil gas shallow vinyl acetate 34 34 2 2000
soil gas shallow vinyl chloride 5.2 5.2 19 280

Notes

  1. SL: Screening level. All values adopted from the EPA Subsurface Vapor Intrusion Guidance, Table 2a: Question 4 generic screening levels and summary sheet.
  2. Blank cells: not detected
  3. Maximum: maximum concentration
  4. Average: average concentrations


Table 5.

Summary of perc active soil vapor data, Chillum perc site, Chillum, Maryland (g/m3)
Sample ID Laboratory Perc Value (g/m3) Lab Qualifier Date
155 QES 184.9   5/9/2002
156 QES 267.6 J 5/9/2002
157 QES 346.8 J 4/12/2002
158 QES 220.1 J 4/12/2002
159 QES 280.3 J 5/9/2002
160 QES 176.9   5/9/2002
161 QES 204.9 J 5/8/2002
162 QES 204 J 5/8/2002
163 QES 137   4/12/2002
164 QES 148.9   5/8/2002
165 QES 204.9 J 5/8/2002
166 QES 164.6   5/8/2002
167 QES 169.1   5/8/2002
168 QES 279.5 J 4/12/2002
169 QES 97.3   4/12/2002
170 QES 229.2 J 5/8/2002
171 QES 69.1   5/3/2002
172 QES     4/11/2002
173 QES     4/11/2002
174 QES     4/11/2002
175 QES     4/11/2002
176 QES     4/11/2002
177 QES     4/11/2002
178 QES     4/11/2002
179 QES     4/11/2002
180 QES 174.2   4/12/2002
181 QES 130.9   4/12/2002
182 QES 190.9   4/12/2002
183 QES 235.5 J 4/10/2002
184 QES     4/10/2002
185 QES 116.5   5/3/2002
186 QES 131.5   5/3/2002
187 QES 58.5   4/10/2002
188 QES 48   4/10/2002
189 QES 186.8   4/10/2002
190 QES 171.9   4/10/2002
191 QES     4/10/2002
192 QES 96.4   5/3/2002
193 QES 131.6   5/3/2002
195 QES 197.9   5/8/2002
196 QES 119.1   5/8/2002
197 USACE     11/4/2002
198 USACE 14   11/5/2002
199 USACE 453   11/13/2002
200 USACE 33   11/6/2002
201 USACE 1140   11/14/2002
202 USACE 1400   11/5/2002
203 USACE 148   12/4/2002
204 USACE 56   11/25/2002
194 USACE 40   11/25/2002
142 USACE 1820   11/14/2002
149 USACE 325   11/25/2002
077 USACE     10/31/2002
080 USACE 6.7   11/1/2002
001 GF-CHEVRON 350   5/9/2002
002 GF-CHEVRON 500   5/9/2002
003 GF-CHEVRON 390   4/12/2002
004 GF-CHEVRON 370   4/12/2002
005 GF-CHEVRON 480   5/9/2002
006 GF-CHEVRON 320   5/9/2002
007 GF-CHEVRON 550   5/8/2002
008 GF-CHEVRON 400   5/8/2002
010 GF-CHEVRON 480   4/12/2002
012 GF-CHEVRON 650   5/8/2002
013 GF-CHEVRON 560   5/8/2002
014 GF-CHEVRON 570   5/8/2002
015 GF-CHEVRON 590   5/8/2002
016 GF-CHEVRON 530   4/12/2002
017 GF-CHEVRON 520   4/12/2002
018 GF-CHEVRON 310   5/8/2002
019 GF-CHEVRON 160   5/3/2002
020 GF-CHEVRON 520   4/11/2002
021 GF-CHEVRON 770   4/11/2002
022 GF-CHEVRON 860   4/11/2002
023 GF-CHEVRON 710   4/11/2002
024 GF-CHEVRON 720   4/11/2002
025 GF-CHEVRON 770   4/11/2002
026 GF-CHEVRON 660   4/11/2002
027 GF-CHEVRON 560   4/11/2002
028 GF-CHEVRON 21   1/31/2002
031 GF-CHEVRON 140   4/12/2002
033 GF-CHEVRON 430   4/12/2002
034 GF-CHEVRON 680   4/10/2002
035 GF-CHEVRON   U 4/10/2002
036 GF-CHEVRON 290   5/3/2002
037 GF-CHEVRON 270   5/3/2002
038 GF-CHEVRON 15   4/10/2002
039 GF-CHEVRON 14   4/10/2002
040 GF-CHEVRON 680   4/10/2002
042 GF-CHEVRON 660   4/10/2002
043 GF-CHEVRON   U 4/10/2002
044 GF-CHEVRON   U 1/31/2002
046 GF-CHEVRON   U 2/8/2002
047 GF-CHEVRON   U 2/8/2002
048 GF-CHEVRON 160   5/3/2002
049 GF-CHEVRON 160   5/3/2002
050 GF-CHEVRON   U 2/7/2002
052 GF-CHEVRON   U 2/6/2002
054 GF-CHEVRON   U 2/7/2002
057 GF-CHEVRON   U 1/30/2002
056 GF-CHEVRON   U 1/30/2002
059 GF-CHEVRON   U 1/28/2002
061 GF-CHEVRON   U 1/31/2002
063 GF-CHEVRON 480   5/8/2002
064 GF-CHEVRON 290   5/8/2002
067 GF-CHEVRON   U 1/29/2002
068 GF-CHEVRON   U 1/28/2002
071 GF-CHEVRON   U 1/29/2002
078 GF-CHEVRON   U 1/28/2002
074 GF-CHEVRON   U 1/28/2002
081 GF-CHEVRON   U 2/11/2002
082 GF-CHEVRON   U 2/11/2002
084 GF-CHEVRON   U 2/11/2002
085 GF-CHEVRON   U 2/6/2002
086 GF-CHEVRON   U 2/6/2002
104 GF-CHEVRON 18   11/5/2002
108 GF-CHEVRON 60   11/26/2002
110 GF-CHEVRON 380   11/13/2002
114 GF-CHEVRON 22   11/6/2002
116 GF-CHEVRON 1800   11/14/2002
120 GF-CHEVRON 4600   11/5/2002
124 GF-CHEVRON 2900   11/5/2002
132 GF-CHEVRON 180   12/4/2002
134 GF-CHEVRON 730   11/13/2002
139 GF-CHEVRON 63   11/25/2002
138 GF-CHEVRON 55   11/25/2002
142 GF-CHEVRON 4100   11/14/2002
148 GF-CHEVRON 39    
146 GF-CHEVRON 410    
122 GF-CHEVRON 770    
137 GF-CHEVRON 88    
136 GF-CHEVRON 120    
149 GF-CHEVRON 460    
011 QES 95.9   4/12/2002
153 EPA REMOVAL 170    
154 EPA REMOVAL      
089 USACE     11/1/2002
090 USACE     11/14/2002
092 USACE     12/4/2002
095 USACE     12/2/2002
098 USACE     11/4/2002
102 USACE     11/4/2002
109 USACE 439   11/13/2002
117 USACE 1150   11/14/2002
125 USACE 289   11/5/2002
128 USACE 2.8   12/16/2002
129 USACE 42   12/16/2002
143 USACE 253   11/14/2002
150 USACE 234   11/25/2002
009 USACE 19   11/26/2002
076 USACE     10/31/2002
113 USACE 33    
011 GF-CHEVRON 240   4/12/2002
029 GF-CHEVRON 16 B 1/31/2002
045 GF-CHEVRON   U 1/31/2002
051 GF-CHEVRON   U 2/7/2002
053 GF-CHEVRON   U 2/6/2002
058 GF-CHEVRON 3.4   1/30/2002
060 GF-CHEVRON   U 1/28/2002
062 GF-CHEVRON 14 NJ 1/31/2002
065 GF-CHEVRON   U 1/29/2002
066 GF-CHEVRON   U 1/29/2002
069 GF-CHEVRON   U 1/28/2002
070 GF-CHEVRON   U 1/29/2002
079 GF-CHEVRON   U 1/28/2002
075 GF-CHEVRON   U 1/28/2002
088 GF-CHEVRON 4.2   2/6/2002
117 GF-CHEVRON 1800   11/14/2002
135 GF-CHEVRON 32   11/13/2002
150 GF-CHEVRON 340   11/25/2002
107 GF-CHEVRON 42    
109 GF-CHEVRON 420    
147 GF-CHEVRON 230    
113 GF-CHEVRON 22    
123 GF-CHEVRON 390    
121 GF-CHEVRON 1400    
143 GF-CHEVRON 380    
125 GF-CHEVRON 380    

Notes:

QES: Quality Environmental Solutions
USACE: U.S. Army Corp of Engineers
GF-Chevron: Gannett Fleming, Inc. (contractor of Chevron)
J: Compound was detected; quantification is approximate because of limitations identified during the quality control review.
NJ: Compound was analyzed for, but not detected; quantification is approximate because of limitations identified during the quality control review.
U: Compound was analyzed for, but not detected.
Blank cell: not detected



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