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1 <br /> Toluene, and 97 ppm xylenes) and in the groundwater <br /> (concentration up to 11 ppm TPH-G, 0 . 12 ppm Benzene, 0.1 ppm <br /> toluene, and 0. 28 ppm xylenes) . (See Figure 2) . <br />' In accordance with Cleanup and Abatement Order No. 90-702, <br /> issued by the CRWQCB in March 1990 , BC performed quarterly <br /> sampling of monitoring wells 1 through 5, May 4 , 1990. The <br />' results of this sampling episode are represented as Table 1. <br /> TABLE 1 <br />' GROUNDWATER SAMPLE ANALYSES <br /> (5-4-90 ) <br /> SAMPLE LOCATION/CONCENTRATION <br /> CONSTITUENT MW-1 NW-2 MW-3 MW-4 MW-5 <br /> (ug/L) (ug/L) (ug/L) (ug/L) (ug/L) <br />' Benzene 230 .0 ND 28. 0 2800.0 96. 0 <br /> Toluene 190.0 ND 3. 7 890.0 9. 0 <br /> Ethylbenzene ND ND 13. 0 54 .0 ND <br /> Xylene 44.0 ND 53. 0 1100. 0 75. 0 <br />' TPH-Gasoline 1900. 0 ND. 1300. 0 7800 . 0 280 . 0 <br /> NOTE: ND Represents none detected <br />' On July 7, 1990 , BC performed the quarterly sampling of <br /> monitoring wells 6 through 9. The results of this sampling <br /> episode are represented as Table 2 . <br /> TABLE 2 <br /> GROUNDWATER SAMPLE ANALYSES <br />' (7-7-90) <br /> SAMPLE LOCATION/CONCENTRATION <br /> CONSTITUENT MW-6 MW-7 NW-8 NW-9 <br /> (ug/L) (ug/L) (ug/L) (ug/L) <br /> Benzene ND 3 .7 140 . 0 150.0 <br /> Toluene 2 ..2 0 .6 55 . 0 72.0 <br /> Ethylbenzene 0 . 3 0 .9 160 . 0 83 .0 <br /> Xylene 3 .4 7 . 3 160 . 0 190.0 <br /> TPH-Gasoline ND 350.0 1700 . 0 2300.0 <br /> NOTE: ND Represents none detected <br /> On May 20, 1991 , Blaine Tech Services, Inc. (BTS) , performed <br /> the sampling of the newly constructed monitoring wells 10 , <br /> 11, 12, 13 , and EW-1 (Figure 2 ) . The results of this <br /> sampling episode are represented as Table 3 . <br /> ISTE Project No. 4001 <br /> Page 2 <br />