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STE Project No. 4001-001 <br /> Page 5 <br />' TABLE 6 <br /> GROUNDWATER SAMPLE ANALYSES <br /> ( 12-9-91) . <br /> SAMPLE LOCATION/CONCENTRATION <br /> MW-6 MW-7 MW-8 MW-9 MW-10 MW-11 MW-12 NW-13 BLANK <br /> (ug/L) (ug/L) (ug/L) (ug/L) (ug/L) (ug/L) (ug/L) (ug/L) (ug/L) <br /> B ND ND ND ND ND ND ND ND ND <br /> T ND ND ND ND ND ND ND ND ND <br /> E ND ND ND 8.0 ND ND ND ND ND ' <br /> X ND ND ND 12.0 ND ND ND ND ND <br /> TPH-G ND ND ND 0.7 ND ND ND ND ND <br /> NOTE: ND Represents none detected <br /> As requested by Mr. Steve Schneider of the San Joaquin County <br />' Public Health Services Department, the extraction well (EW-1 ) <br /> was purged and sampled, January 24 , 1992. Mr. Schneider was <br /> on site to observe the sampling of EW-1. <br />' The results of this sampling activity as well as the results <br /> from the December 25 , 1991 sampling episode were presented as <br /> an addendum report in January 1992. <br /> The groundwater sample was 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 (Table 7 ) . <br /> TABLE 7 <br />' GROUNDWATER SAMPLE ANALYSES <br /> ( 1-24-92) <br /> SAMPLE LOCATION/CONCENTRATION <br />' CONSTITUENT EW-1 MDL <br /> (ug/L) (ug/L) <br /> Benzene 450 .0 0 . 3 <br /> Toluene 10 .0 0 . 3 <br /> Ethylbenzene 86 .0 0 . 3 <br /> Xylene 471. 0 0 . 3 <br /> TPH-Gasoline 8900.0 50.0 <br /> NOTE: ND Represents none detected <br /> 1 O 92 SUN TECH sampled monitoring well 4 6 7 <br /> On June 29 , 19 p g , � , <br /> 10 , 11 , 12 and 13 . The groundwater samples were analyzed by <br /> a California certified laboratory (Sherwood Labs Corp. ) using <br /> 1 <br />