6.1.2. Informational Monitoring



Samples were collected quarterly at the wellhead. These samples were analyzed for several types of radioactive constituents and VOCs to determine their presence in ANL-E drinking water. Samples from each well were tested for total alpha, total beta, hydrogen-3, and strontium-90. Alpha and beta radioactivity were determined by a gas flow proportional counting technique. Hydrogen-3 was determined by distillation followed by a beta liquid scintillation counting technique. Strontium-90 was determined by ion-exchange separations followed by proportional counting. The results are presented in Table 6.6. Because ANL-E is a nontransient,

TABLE 6.5

Copper/Lead Samples Collected March 2 and August 22, 1995 (Concentrations in mg/L)

March 2 August 22
Sample No. Copper Lead Copper Lead
1 0.05 <0.005 0.04 <0.005
2 0.16 <0.005 0.12 <0.005
3 0.20 <0.005 0.15 <0.005
4 0.27 <0.005 0.15 <0.005
5 0.28 <0.005 0.28 <0.005
6 0.37 <0.005 0.31 <0.005
7 0.44 <0.005 0.37 <0.005
8 0.53 <0.005 0.39 <0.005
9 0.53 <0.005 0.41 <0.005
10 0.57 <0.005 0.48 <0.005
11 0.57 <0.005 0.53 <0.005
12 0.61 <0.005 0.54 <0.005
13 0.62 <0.005 0.54 <0.005
14 0.62 <0.005 0.55 <0.005
15 0.66 <0.005 0.59 <0.005
16 0.75 <0.005 0.67 <0.005
17 0.76 <0.005 0.67 <0.005
18 0.83 <0.005 0.70 <0.005
19 0.84 <0.005 0.77 <0.005
20 0.86 <0.005 0.77 <0.005
21 0.90 <0.005 0.79 <0.005
22 0.92 <0.005 0.79 <0.005
23 0.97 <0.005 0.81 <0.005
24 1.0 <0.005 0.87 <0.005
25 1.0 <0.005 0.94 <0.005
26 1.1 <0.005 1.0 <0.005
27 1.1 <0.005 1.0 <0.005
28 1.2 <0.005 1.0 <0.005
29 1.2 <0.005 1.1 <0.005
30 1.2 <0.005 1.1 <0.005
31 1.2 <0.005 1.1 <0.005
32 1.3 <0.005 1.2 <0.005
33 1.3 0.005 1.3 <0.005
34 1.8 0.006 1.4 <0.005
35 1.8 0.006 1.4 <0.005
36 2.0 (90th Percentile) 0.007 (90th Percentile) 2.0 (90th Percentile) <0.005 (90th Percentile)
37 2.1 0.008 2.1 0.005
38 2.2 0.009 2.5 0.008
39 2.4 0.012 2.8 0.015
40 2.6 0.016 2.8 0.023
Action Level 1.3 0.015 1.3 0.015

noncommunity water system, the following EPA limits are established for the nuclides measured in Table 6.6:

Gross Alpha Particle Activity = 15 pCi/L
Gross Beta Particle Activity = 50 pCi/L
Hydrogen-3 = 2 104 pCi/L
Strontium-90 = 8 pCi/L

Well 1 was removed from service in 1990, and the system was not operated during 1995; however, samples were collected for monitoring. All the radiological results are in the normal range of concentrations for the various constituents except for strontium-90 in well 1. The concentration of strontium-90 in well 1 was 3% of the EPA drinking water standard. Since hydrogen-3 had been identified in well 1 in the past, these constitutes may be indicators of continued migration from the same source.

Although VOCs were not required to demonstrate compliance with the Drinking Water Regulations for 1995, the results are included in the informational monitoring section to determine if any past disposal practices have resulted in groundwater contamination and to support the environmental restoration program. Samples were collected quarterly, and the results are presented in Tables 6.7 through 6.10. Samples were analyzed for the SDWA volatile compounds and quantified by EPA Method 524.2. The limit of detection reported in the tables is the practical quantification limit, which is defined as 10 times the method detection limit.

Trichloroethylene was found in well 1 in the first and fourth quarter samples while dichloromethane was found in all the wells and tap water in the fourth quarter sample. The tap water samples showed five VOCs (dichlorobromomethane, bromoform, chlorodibromomethane, chloroform, and dibromomethane) present. These compounds are known to be associated with chlorination of drinking water, that is, trihalomethanes.

TABLE 6.6

Radioactivity in ANL-E Domestic Wells, 1995 (Concentrations in pCi/L)

Type of Activity Location No. of Samples Avg. Min. Max.
Alpha Well 1 4 9.4 8.1 11.1
(Nonvolatile) Well 2 4 4.1 3.1 6.0
Well 3 4 3.3 1.8 4.7
Well 4 4 2.5 1.4 4.4
Tap 4 1.0 0.7 1.5
Beta Well 1 4 16.1 12.9 19.3
(Nonvolatile) Well 2 4 9.1 8.4 10.1
Well 3 4 10.2 9.2 11.3
Well 4 4 10.3 9.1 12.8
Tap 4 4.7 4.3 5.2
Hydrogen-3 Well 1 4 124 <100 176
Well 2 4 <100 <100 <100
Well 3 4 <100 <100 <100
Well 4 4 <100 <100 <100
Tap 4 <100 <100 <100
Strontium-90 Well 1 4 <0.25 <0.25 0.27
Well 2 4 <0.25 <0.25 <0.25
Well 3 4 <0.25 <0.25 <0.25
Well 4 4 <0.25 <0.25 <0.25
Tap 4 <0.25 <0.25 <0.25

TABLE 6.7

Volatile Organic Compounds in Drinking Water Collected February 28, 1995 (Concentrations in mg/L)

Parameter Well 1 Well 2 Well 3 Well 4 Tap
Benzene < 0.0005 < 0.0005 < 0.0005 < 0.0005 < 0.0005
Vinyl Chloride < 0.0005 < 0.0005 < 0.0005 < 0.0005 < 0.0005
Carbon Tetrachloride < 0.0005 < 0.0005 < 0.0005 < 0.0005 < 0.0005
1,2-Dichloroethane < 0.0005 < 0.0005 < 0.0005 < 0.0005 < 0.0005
Trichloroethylene 0.0013 < 0.0005 < 0.0005 < 0.0005 < 0.0005
1,1-Dichloroethylene < 0.0005 < 0.0005 < 0.0005 < 0.0005 < 0.0005
1,1,1-Trichloroethylene < 0.0005 < 0.0005 < 0.0005 < 0.0005 < 0.0005
p-Dichlorobenzene < 0.0005 < 0.0005 < 0.0005 < 0.0005 < 0.0005
Bromobenzene < 0.001 < 0.001 < 0.001 < 0.001 < 0.001
Dichlorobromomethane < 0.0005 < 0.0005 < 0.0005 < 0.0005 0.0119
Bromoform < 0.0005 < 0.0005 < 0.0005 < 0.0005 0.0012
Bromomethane < 0.002 < 0.002 < 0.002 < 0.002 < 0.002
Chlorobenzene < 0.0005 < 0.0005 < 0.0005 < 0.0005 < 0.0005
Chlorodibromomethane < 0.0005 < 0.0005 < 0.0005 < 0.0005 0.0091
Chloroethane < 0.002 < 0.002 < 0.002 < 0.002 < 0.002
Chloroform < 0.0005 < 0.0005 < 0.0005 < 0.0005 0.0095
Chloromethane < 0.002 < 0.002 < 0.002 < 0.002 < 0.002
o-Chlorotoluene < 0.001 < 0.001 < 0.001 < 0.001 < 0.001
p-Chlorotoluene < 0.001 < 0.001 < 0.001 < 0.001 < 0.001
Dibromomethane < 0.001 < 0.001 < 0.001 < 0.001 < 0.001
m-Dichlorobenzene < 0.001 < 0.001 < 0.001 < 0.001 < 0.001
o-Dichlorobenzene < 0.0005 < 0.0005 < 0.0005 < 0.0005 < 0.0005
1,1-Dichloroethane < 0.001 < 0.001 < 0.001 < 0.001 < 0.001
cis-1,2-Dichloroethylene < 0.0005 < 0.0005 < 0.0005 < 0.0005 < 0.0005
trans-1,2-Dichloroethylene < 0.0005 < 0.0005 < 0.0005 < 0.0005 < 0.0005
Dichloromethane < 0.0005 < 0.0005 < 0.0005 < 0.0005 < 0.0005
1,2-Dichloropropane < 0.0005 < 0.0005 < 0.0005 < 0.0005 < 0.0005
1,3-Dichloropropane < 0.001 < 0.001 < 0.001 < 0.001 < 0.001
2,2-Dichloropropane < 0.001 < 0.001 < 0.001 < 0.001 < 0.001
1,1-Dichloropropene < 0.001 < 0.001 < 0.001 < 0.001 < 0.001
1,3-Dichloropropene < 0.001 < 0.001 < 0.001 < 0.001 < 0.001
Ethylbenzene < 0.0005 < 0.0005 < 0.0005 < 0.0005 0.0008
Styrene < 0.0005 < 0.0005 < 0.0005 < 0.0005 < 0.0005
1,1,1,2-Tetrachloroethane < 0.001 < 0.001 < 0.001 < 0.001 < 0.001
1,1,2,2-Tetrachloroethane < 0.001 < 0.001 < 0.001 < 0.001 < 0.001
Parameter Well 1 Well 2 Well 3 Well 4 Tap
Tetrachloroethylene < 0.0005 < 0.0005 < 0.0005 < 0.0005 < 0.0005
Toluene < 0.0005 < 0.0005 < 0.0005 < 0.0005 < 0.0005
1,1,2-Trichloroethane < 0.0005 < 0.0005 < 0.0005 < 0.0005 < 0.0005
1,2,3-Trichloropropane < 0.001 < 0.001 < 0.001 < 0.001 < 0.001
m&p-Xylene < 0.0005 < 0.0005 < 0.0005 < 0.0005 0.0021
o-Xylene < 0.0005 < 0.0005 < 0.0005 < 0.0005 0.0005
1,2-Dibromo-3-Chloropropane < 0.010 < 0.010 < 0.010 < 0.010 < 0.010
Ethylenedibromide (EDB) < 0.010 < 0.010 < 0.010 < 0.010 < 0.010
Bromochloromethane < 0.001 < 0.001 < 0.001 < 0.001 < 0.001
n-Butylbenzene < 0.001 < 0.001 < 0.001 < 0.001 < 0.001
sec-Butylbenzene < 0.001 < 0.001 < 0.001 < 0.001 < 0.001
tert-Butylbenzene < 0.001 < 0.001 < 0.001 < 0.001 < 0.001
Dichlorodifluoromethane < 0.001 < 0.001 < 0.001 < 0.001 < 0.001
Fluorotrichloromethane < 0.001 < 0.001 < 0.001 < 0.001 < 0.001
Hexachlorobutadiene < 0.001 < 0.001 < 0.001 < 0.001 < 0.001
Isopropylbenzene < 0.001 < 0.001 < 0.001 < 0.001 < 0.001
p-Isopropyltoluene < 0.001 < 0.001 < 0.001 < 0.001 < 0.001
Naphthalene < 0.001 < 0.001 < 0.001 < 0.001 < 0.001
n-Propylbenzene < 0.001 < 0.001 < 0.001 < 0.001 < 0.001
1,2,3-Trichlorobenzene < 0.001 < 0.001 < 0.001 < 0.001 < 0.001
1,2,4-Trichlorobenzene < 0.0005 < 0.0005 < 0.0005 < 0.0005 < 0.0005
1,2,4-Trimethylbenzene < 0.001 < 0.001 < 0.001 < 0.001 < 0.001
1,3,5-Trimethylbenzene < 0.001 < 0.001 < 0.001 < 0.001 < 0.001

TABLE 6.8

Volatile Organic Compounds in Drinking Water Collected May 18, 1995 (Concentrations in mg/L)

Parameter Well 1 Well 2 Well 3 Well 4 Tap
Benzene < 0.0005 < 0.0005 < 0.0005 < 0.0005 < 0.0005
Vinyl Chloride < 0.0005 < 0.0005 < 0.0005 < 0.0005 < 0.0005
Carbon Tetrachloride < 0.0005 < 0.0005 < 0.0005 < 0.0005 < 0.0005
1,2-Dichloroethane < 0.0005 < 0.0005 < 0.0005 < 0.0005 < 0.0005
Trichloroethylene < 0.0005 < 0.0005 < 0.0005 < 0.0005 < 0.0005
1,1-Dichloroethylene < 0.0005 < 0.0005 < 0.0005 < 0.0005 < 0.0005
1,1,1-Trichloroethylene < 0.0005 < 0.0005 < 0.0005 < 0.0005 < 0.0005
p-Dichlorobenzene < 0.0005 < 0.0005 < 0.0005 < 0.0005 < 0.0005
Bromobenzene < 0.001 < 0.001 < 0.001 < 0.001 < 0.001
Dichlorobromomethane < 0.0005 < 0.0005 < 0.0005 < 0.0005 0.0121
Bromoform < 0.0005 < 0.0005 < 0.0005 < 0.0005 0.0057
Bromomethane < 0.002 < 0.002 < 0.002 < 0.002 < 0.002
Chlorobenzene < 0.0005 < 0.0005 < 0.0005 < 0.0005 < 0.0005
Chlorodibromomethane < 0.0005 < 0.0005 < 0.0005 < 0.0005 0.0157
Chloroethane < 0.002 < 0.002 < 0.002 < 0.002 < 0.002
Chloroform < 0.0005 < 0.0005 < 0.0005 < 0.0005 0.0062
Chloromethane < 0.002 < 0.002 < 0.002 < 0.002 < 0.002
o-Chlorotoluene < 0.001 < 0.001 < 0.001 < 0.001 < 0.001
p-Chlorotoluene < 0.001 < 0.001 < 0.001 < 0.001 < 0.001
Dibromomethane < 0.001 < 0.001 < 0.001 < 0.001 0.0012
m-Dichlorobenzene < 0.001 < 0.001 < 0.001 < 0.001 < 0.001
o-Dichlorobenzene < 0.0005 < 0.0005 < 0.0005 < 0.0005 < 0.0005
1,1-Dichloroethane < 0.001 < 0.001 < 0.001 < 0.001 < 0.001
cis-1,2-Dichloroethylene < 0.0005 < 0.0005 < 0.0005 < 0.0005 < 0.0005
trans-1,2-Dichloroethylene < 0.0005 < 0.0005 < 0.0005 < 0.0005 < 0.0005
Dichloromethane < 0.0005 < 0.0005 < 0.0005 < 0.0005 < 0.0005
1,2-Dichloropropane < 0.0005 < 0.0005 < 0.0005 < 0.0005 < 0.0005
1,3-Dichloropropane < 0.001 < 0.001 < 0.001 < 0.001 < 0.001
2,2-Dichloropropane < 0.001 < 0.001 < 0.001 < 0.001 < 0.001
1,1-Dichloropropene < 0.001 < 0.001 < 0.001 < 0.001 < 0.001
1,3-Dichloropropene < 0.001 < 0.001 < 0.001 < 0.001 < 0.001
Ethylbenzene < 0.0005 < 0.0005 < 0.0005 < 0.0005 0.0006
Styrene < 0.0005 < 0.0005 < 0.0005 < 0.0005 < 0.0005
1,1,1,2-Tetrachloroethane < 0.001 < 0.001 < 0.001 < 0.001 < 0.001
1,1,2,2-Tetrachloroethane < 0.001 < 0.001 < 0.001 < 0.001 < 0.001
Tetrachloroethylene < 0.0005 < 0.0005 < 0.0005 < 0.0005 < 0.0005
Toluene < 0.0005 < 0.0005 < 0.0005 < 0.0005 < 0.0005
1,1,2-Trichloroethane < 0.0005 < 0.0005 < 0.0005 < 0.0005 < 0.0005
1,2,3-Trichloropropane < 0.001 < 0.001 < 0.001 < 0.001 < 0.001
m&p-Xylene < 0.0005 < 0.0005 < 0.0005 < 0.0005 0.0025
o-Xylene < 0.0005 < 0.0005 < 0.0005 < 0.0005 0.0006
1,2-Dibromo-3-Chloropropane < 0.010 < 0.010 < 0.010 < 0.010 < 0.010
Ethylenedibromide (EDB) < 0.010 < 0.010 < 0.010 < 0.010 < 0.010
Bromochloromethane < 0.001 < 0.001 < 0.001 < 0.001 < 0.001
n-Butylbenzene < 0.001 < 0.001 < 0.001 < 0.001 < 0.001
sec-Butylbenzene < 0.001 < 0.001 < 0.001 < 0.001 < 0.001
tert-Butylbenzene < 0.001 < 0.001 < 0.001 < 0.001 < 0.001
Dichlorodifluoromethane < 0.001 < 0.001 < 0.001 < 0.001 < 0.001
Fluorotrichloromethane < 0.001 < 0.001 < 0.001 < 0.001 < 0.001
Hexachlorobutadiene < 0.001 < 0.001 < 0.001 < 0.001 < 0.001
Isopropylbenzene < 0.001 < 0.001 < 0.001 < 0.001 < 0.001
p-Isopropyltoluene < 0.001 < 0.001 < 0.001 < 0.001 < 0.001
Naphthalene < 0.001 < 0.001 < 0.001 < 0.001 < 0.001
n-Propylbenzene < 0.001 < 0.001 < 0.001 < 0.001 < 0.001
1,2,3-Trichlorobenzene < 0.001 < 0.001 < 0.001 < 0.001 < 0.001
1,2,4-Trichlorobenzene < 0.0005 < 0.0005 < 0.0005 < 0.0005 < 0.0005
1,2,4-Trimethylbenzene < 0.001 < 0.001 < 0.001 < 0.001 < 0.001
1,3,5-Trimethylbenzene < 0.001 < 0.001 < 0.001 < 0.001 < 0.001

TABLE 6.9

Volatile Organic Compounds in Drinking Water Collected August 14, 1995 (Concentrations in mg/L)

Parameter Well 1 Well 2 Well 3 Well 4 Tap
Benzene < 0.0005 < 0.0005 < 0.0005 < 0.0005 < 0.0005
Vinyl Chloride < 0.0005 < 0.0005 < 0.0005 < 0.0005 < 0.0005
Carbon Tetrachloride < 0.0005 < 0.0005 < 0.0005 < 0.0005 < 0.0005
1,2-Dichloroethane < 0.0005 < 0.0005 < 0.0005 < 0.0005 < 0.0005
Trichloroethylene < 0.0005 < 0.0005 < 0.0005 < 0.0005 < 0.0005
1,1-Dichloroethylene < 0.0005 < 0.0005 < 0.0005 < 0.0005 < 0.0005
1,1,1-Trichloroethylene < 0.0005 < 0.0005 < 0.0005 < 0.0005 < 0.0005
p-Dichlorobenzene < 0.0005 < 0.0005 < 0.0005 < 0.0005 < 0.0005
Bromobenzene < 0.001 < 0.001 < 0.001 < 0.001 < 0.001
Dichlorobromomethane < 0.0005 < 0.0005 < 0.0005 < 0.0005 0.0108
Bromoform < 0.0005 < 0.0005 < 0.0005 < 0.0005 0.0044
Bromomethane < 0.002 < 0.002 < 0.002 < 0.002 < 0.002
Chlorobenzene < 0.0005 < 0.0005 < 0.0005 < 0.0005 < 0.0005
Chlorodibromomethane < 0.0005 < 0.0005 < 0.0005 < 0.0005 0.0145
Chloroethane < 0.002 < 0.002 < 0.002 < 0.002 < 0.002
Chloroform < 0.0005 < 0.0005 < 0.0005 < 0.0005 0.0053
Chloromethane < 0.002 < 0.002 < 0.002 < 0.002 < 0.002
o-Chlorotoluene < 0.001 < 0.001 < 0.001 < 0.001 < 0.001
p-Chlorotoluene < 0.001 < 0.001 < 0.001 < 0.001 < 0.001
Dibromomethane < 0.001 < 0.001 < 0.001 < 0.001 < 0.001
m-Dichlorobenzene < 0.001 < 0.001 < 0.001 < 0.001 < 0.001
o-Dichlorobenzene < 0.0005 < 0.0005 < 0.0005 < 0.0005 < 0.0005
1,1-Dichloroethane < 0.001 < 0.001 < 0.001 < 0.001 < 0.001
cis-1,2-Dichloroethylene < 0.0005 < 0.0005 < 0.0005 < 0.0005 < 0.0005
trans-1,2-Dichloroethylene < 0.0005 < 0.0005 < 0.0005 < 0.0005 < 0.0005
Dichloromethane < 0.0005 < 0.0005 < 0.0005 < 0.0005 < 0.0005
1,2-Dichloropropane < 0.0005 < 0.0005 < 0.0005 < 0.0005 < 0.0005
1,3-Dichloropropane < 0.001 < 0.001 < 0.001 < 0.001 < 0.001
2,2-Dichloropropane < 0.001 < 0.001 < 0.001 < 0.001 < 0.001
1,1-Dichloropropene < 0.001 < 0.001 < 0.001 < 0.001 < 0.001
1,3-Dichloropropene < 0.001 < 0.001 < 0.001 < 0.001 < 0.001
Ethylbenzene < 0.0005 < 0.0005 < 0.0005 < 0.0005 0.0005
Styrene < 0.0005 < 0.0005 < 0.0005 < 0.0005 < 0.0005
1,1,1,2-Tetrachloroethane < 0.001 < 0.001 < 0.001 < 0.001 < 0.001
1,1,2,2-Tetrachloroethane < 0.001 < 0.001 < 0.001 < 0.001 < 0.001
Tetrachloroethylene < 0.0005 < 0.0005 < 0.0005 < 0.0005 < 0.0005
Toluene < 0.0005 < 0.0005 < 0.0005 < 0.0005 < 0.0005
1,1,2-Trichloroethane < 0.0005 < 0.0005 < 0.0005 < 0.0005 < 0.0005
1,2,3-Trichloropropane < 0.001 < 0.001 < 0.001 < 0.001 < 0.001
m&p-Xylene < 0.0005 < 0.0005 < 0.0005 < 0.0005 0.0022
o-Xylene < 0.0005 < 0.0005 < 0.0005 < 0.0005 0.0006
1,2-Dibromo-3-Chloropropane < 0.010 < 0.010 < 0.010 < 0.010 < 0.010
Ethylenedibromide (EDB) < 0.010 < 0.010 < 0.010 < 0.010 < 0.010
Bromochloromethane < 0.001 < 0.001 < 0.001 < 0.001 < 0.001
n-Butylbenzene < 0.001 < 0.001 < 0.001 < 0.001 < 0.001
sec-Butylbenzene < 0.001 < 0.001 < 0.001 < 0.001 < 0.001
tert-Butylbenzene < 0.001 < 0.001 < 0.001 < 0.001 < 0.001
Dichlorodifluoromethane < 0.001 < 0.001 < 0.001 < 0.001 < 0.001
Fluorotrichloromethane < 0.001 < 0.001 < 0.001 < 0.001 < 0.001
Hexachlorobutadiene < 0.001 < 0.001 < 0.001 < 0.001 < 0.001
Isopropylbenzene < 0.001 < 0.001 < 0.001 < 0.001 < 0.001
p-Isopropyltoluene < 0.001 < 0.001 < 0.001 < 0.001 < 0.001
Naphthalene < 0.001 < 0.001 < 0.001 < 0.001 < 0.001
n-Propylbenzene < 0.001 < 0.001 < 0.001 < 0.001 < 0.001
1,2,3-Trichlorobenzene < 0.001 < 0.001 < 0.001 < 0.001 < 0.001
1,2,4-Trichlorobenzene < 0.0005 < 0.0005 < 0.0005 < 0.0005 < 0.0005
1,2,4-Trimethylbenzene < 0.001 < 0.001 < 0.001 < 0.001 < 0.001
1,3,5-Trimethylbenzene < 0.001 < 0.001 < 0.001 < 0.001 < 0.001

TABLE 6.10

Volatile Organic Compounds in Drinking Water Collected November 20, 1995 (Concentrations in mg/L)

Parameter Well 1 Well 2 Well 3 Well 4 Tap
Benzene < 0.0005 < 0.0005 < 0.0005 < 0.0005 < 0.0005
Vinyl Chloride < 0.0005 < 0.0005 < 0.0005 < 0.0005 < 0.0005
Carbon Tetrachloride < 0.0005 < 0.0005 < 0.0005 < 0.0005 < 0.0005
1,2-Dichloroethane < 0.0005 < 0.0005 < 0.0005 < 0.0005 < 0.0005
Trichloroethylene 0.0007 < 0.0005 < 0.0005 < 0.0005 < 0.0005
1,1-Dichloroethylene < 0.0005 < 0.0005 < 0.0005 < 0.0005 < 0.0005
1,1,1-Trichloroethylene < 0.0005 < 0.0005 < 0.0005 < 0.0005 < 0.0005
p-Dichlorobenzene < 0.0005 < 0.0005 < 0.0005 < 0.0005 < 0.0005
Bromobenzene < 0.001 < 0.001 < 0.001 < 0.001 < 0.001
Dichlorobromomethane < 0.0005 < 0.0005 < 0.0005 < 0.0005 0.0053
Bromoform < 0.0005 < 0.0005 < 0.0005 < 0.0005 0.0062
Bromomethane < 0.002 < 0.002 < 0.002 < 0.002 < 0.002
Chlorobenzene < 0.0005 < 0.0005 < 0.0005 < 0.0005 < 0.0005
Chlorodibromomethane < 0.0005 < 0.0005 < 0.0005 < 0.0005 0.0110
Chloroethane < 0.002 < 0.002 < 0.002 < 0.002 < 0.002
Chloroform < 0.0005 < 0.0005 < 0.0005 < 0.0005 0.0016
Chloromethane < 0.002 < 0.002 < 0.002 < 0.002 < 0.002
o-Chlorotoluene < 0.001 < 0.001 < 0.001 < 0.001 <0.001
p-Chlorotoluene < 0.001 < 0.001 < 0.001 < 0.001 < 0.001
Dibromomethane < 0.001 < 0.001 < 0.001 < 0.001 < 0.001
m-Dichlorobenzene < 0.001 < 0.001 < 0.001 < 0.001 < 0.001
o-Dichlorobenzene < 0.0005 < 0.0005 < 0.0005 < 0.0005 < 0.0005
1,1-Dichloroethane < 0.001 < 0.001 < 0.001 < 0.001 < 0.001
cis-1,2-Dichloroethylene < 0.0005 < 0.0005 < 0.0005 < 0.0005 < 0.0005
trans-1,2-Dichloroethylene < 0.0005 < 0.0005 < 0.0005 < 0.0005 < 0.0005
Dichloromethane 0.0027 0.0014 0.0018 0.0010 0.0012
1,2-Dichloropropane < 0.0005 < 0.0005 < 0.0005 < 0.0005 < 0.0005
1,3-Dichloropropane < 0.001 < 0.001 < 0.001 < 0.001 < 0.001
2,2-Dichloropropane < 0.001 < 0.001 < 0.001 < 0.001 < 0.001
1,1-Dichloropropene < 0.001 < 0.001 < 0.001 < 0.001 < 0.001
1,3-Dichloropropene < 0.001 < 0.001 < 0.001 < 0.001 < 0.001
Ethylbenzene < 0.0005 < 0.0005 < 0.0005 < 0.0005 < 0.0005
Styrene < 0.0005 < 0.0005 < 0.0005 < 0.0005 < 0.0005
1,1,1,2-Tetrachloroethane < 0.001 < 0.001 < 0.001 < 0.001 < 0.001
1,1,2,2-Tetrachloroethane < 0.001 < 0.001 < 0.001 < 0.001 < 0.001
Tetrachloroethylene < 0.0005 < 0.0005 < 0.0005 < 0.0005 < 0.0005
Toluene < 0.0005 < 0.0005 < 0.0005 < 0.0005 < 0.0005
1,1,2-Trichloroethane < 0.0005 < 0.0005 < 0.0005 < 0.0005 < 0.0005
1,2,3-Trichloropropane < 0.001 < 0.001 < 0.001 < 0.001 < 0.001
m&p-Xylene < 0.0005 < 0.0005 < 0.0005 < 0.0005 0.0006
o-Xylene < 0.0005 < 0.0005 < 0.0005 < 0.0005 < 0.0005
1,2-Dibromo-3-Chloropropane < 0.010 < 0.010 < 0.010 < 0.010 < 0.010
Ethylenedibromide (EDB) < 0.010 < 0.010 < 0.010 < 0.010 < 0.010
Bromochloromethane < 0.001 < 0.001 < 0.001 < 0.001 < 0.001
n-Butylbenzene < 0.001 < 0.001 < 0.001 < 0.001 < 0.001
sec-Butylbenzene < 0.001 < 0.001 < 0.001 < 0.001 < 0.001
tert-Butylbenzene < 0.001 < 0.001 < 0.001 < 0.001 < 0.001
Dichlorodifluoromethane < 0.001 < 0.001 < 0.001 < 0.001 < 0.001
Fluorotrichloromethane < 0.001 < 0.001 < 0.001 < 0.001 < 0.001
Hexachlorobutadiene < 0.001 < 0.001 < 0.001 < 0.001 < 0.001
Isopropylbenzene < 0.001 < 0.001 < 0.001 < 0.001 < 0.001
p-Isopropyltoluene < 0.001 < 0.001 < 0.001 < 0.001 < 0.001
Naphthalene < 0.001 < 0.001 < 0.001 < 0.001 < 0.001
n-Propylbenzene < 0.001 < 0.001 < 0.001 < 0.001 < 0.001
1,2,3-Trichlorobenzene < 0.001 < 0.001 < 0.001 < 0.001 < 0.001
1,2,4-Trichlorobenzene < 0.0005 < 0.0005 < 0.0005 < 0.0005 < 0.0005
1,2,4-Trimethylbenzene < 0.001 < 0.001 < 0.001 < 0.001 < 0.001
1,3,5-Trimethylbenzene < 0.001 < 0.001 < 0.001 < 0.001 < 0.001





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