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1 <br /> TABLE 3 <br /> GROUNDWATER SAMPLE ANALYSES <br /> (5-20-91) <br /> SAMPLE LOCATION/CONCENTRATION <br /> CONSTITUENT MW-10 MW-11 MW-12 MW-13 EW-1 <br />' (ug/L) (ug/L) (ug/L) (ug/L) (ug/L) <br /> Benzene ND ND ND ND 330 .0 <br />' Toluene ND 0. 3 ND 0 . 3 24. 0 <br /> Ethylbenzene ND ND ND ND 240. 0 <br /> Xylene ND 0 .6 ND 0.6 1200.0 <br /> TPH-Gasoline, ND 190.0 ND ND 7200 . 0 <br />' EPA Method 601 <br /> 111-Dichloroethene ND ND ND 2 .0 ND <br />' 1,2-Dichloroethane ND 0 .7 9.0 33 .0 15 . 0 <br /> Trichloroethylene ND ND ND 8. 0 ND <br /> Chlorobenzene ND ND ND 2. 0 ND <br />' Tetrachloroethene ND ND 0. 7 ND ND <br /> NOTE: ND Represents none detected <br />' On June 24 , 1991, BTS performed the quarterly sampling of <br /> monitoring wells 1 through 9 . The results of this sampling <br /> episode are summarized as Table 4 . <br /> TABLE 4 <br /> GROUNDWATER SAMPLE ANALYSES <br /> (6--24-91) <br /> SAMPLE LOCATION/CONCENTRATION <br /> MW-1 NW-2 MW-3 MW-4 NW-5 NW-6 MW-7 NW-8 NW-9 <br /> (ug/L) (ug/L) (ug/L) (ug/L) (ug/L) (ug/L) (ug/L) (ug/L) (ug/L) <br /> B 22. 0 0. 5 39 .0 7400 .0 230 .0 ND ND 0 . 4 300 .0 <br /> T ND 0. 3 ND 7000 .0 86.0 ND ND 0 . 64 190 .0 <br /> E 64 .0 ND 200.0 970 .0 0.4 ND ND 1 . 1 180 .0 <br /> X 28 .0 1. 3 81.0 5700 .0 53 .0 ND ND 15. 0 240 .0 <br /> TPH-G 1300 .0 ND 4300.0 54000 .0 880.0 ND 79. 0 140. 0 3900 .0 <br /> rNOTE: ND Represents none detected <br /> On September 25, 1991 , BTS performed the quarterly sampling <br /> of monitoring wells 6 , 10, 11 , 12 , and 13 . Water levels in <br /> the other monitoring wells was not sufficient to allow <br />' purging and sampling. The results of this sampling episode <br /> are represented as Table 5. <br /> 6 <br /> STE Project No. 4001 <br /> Page 3 <br />