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2.0 CURRENT QUARTERLY MONITORING <br /> SUN TECH sampled monitoring well 6, 7, 10, 11 , 12 , and 13 <br />' June 29, 1992. MW-4 was dry and therefore not sampled. <br /> The groundwater samples were analyzed by a California certified <br />' laboratory (Sherwood Labs Corp. ) using EPA method 602 for BTEX <br /> analysis, with a detection limit of 0. 3 ug/Kg, and EPA method <br /> 5030/Mod. 8015 for TPH-Gasoline analysis, with a detection limit <br /> Of 50.0 ug/L. (See Table 9 and Appendix A) . <br />' TABLE 9 <br /> GROUNDWATER SAMPLE ANALYSES <br /> (6-29-92) <br />' SAMPLE LOCATION/CONCENTRATION <br /> MW-6 MW-7 MW-10 MW-11 MW-12 MW-13 BLANK <br /> (ug/L) (ug/L) (ug/L) (ug/L) (ug/L) (ug/L) (ug/L) <br /> B ND ND ND ND ND ND ND <br /> T ND 0 .4 ND ND ND ND ND <br /> E ND ND ND ND ND ND ND <br /> X 0. 3 ND ND ND ND ND ND <br /> TPH-G ND ND ND ND ND ND ND <br /> NOTE: ND Represents none detected <br /> 3.0 GROUNDWATER FLAW DIRECTION <br /> Site groundwater elevations and flow direction were <br /> determined based on water level measurements taken from <br />' monitoring wells 2 , 3 , 5 , 6, 7, 8 , 9 , 10{ 11, 12 , 13 and <br /> EW-1, June 29, 1992 (Table 10 ) . Monitoring wells 1 and 4 <br /> were dry, and no measurement was taken. <br /> Based on these measurements, the groundwater flow direction_ , <br /> was determined to be in a Southerly direction. A Kriging <br /> program was used to generate a groundwater gradient map, <br /> which has been included as Figure 3 . <br /> STE Project No. 4001 <br /> Page 6 <br />