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Trace Analysir, Labsiratory, Inr. Telephone (510) 783-6960 <br /> 3423 Investment Boulevard 48 * Hayward, California 94545 Facsimile (510) 783-1512 <br /> LOG NUMBER- 2504 <br /> DATE SAMPLED: 09/12/92 <br /> DATE RECEIVED' 09/18/92 <br /> DATE ANALYZED. 09/24/92 <br /> DATE REPORTED 09/28/92 <br /> CUSTOMER: E-Z Serve Petroleum Marketing Company <br /> REQUESTER: Mattie MacDonald of MacDonald and Associates <br /> PROJECT: No. 100966, Stockton <br /> Sample Type: Water <br /> MW 1 MW 2 _ MW 3 <br /> Method and Concen- Reporting Concen- Reporting Concen- Reporting <br /> Constituent. Units tration Limit tration Limit tration Limit <br /> DHS Method: <br /> Total Petroleum Hydro- <br /> carbons as Gasoline ug/l 640 50 1,100 50 79 50 <br /> EPA Method 8020 for: <br /> Benzene ug/l 270 6.8 520 6.8 13 1 4 <br /> 0oluene ug/l ND 7.5 ND 7 5 ND 1 .5 <br /> Ethylbenzene ug/1 ND 9 2 ND 9.2 ND 1 .8 <br /> Xylenes ug/1 ND 24 ND 24 ND 4.8 <br /> MW 4 MW 5 Method Blank <br /> Method and Concen- Reporting Concen- Reporting Concen- Reporting <br /> Constituent: Units tration Limit tration _ Limit. tration Limit <br /> DMS Method: <br /> Total Petroleum Hydro- <br /> carbons as Gasoline ug/l 89 50 59 50 ND 50 <br /> EPA Method 8020 for: <br /> Benzene ug/1 12 1 .4 ND 1 4 ND 0.50 <br /> Toluene ug/l ND 1 .5 ND 1 .5 ND 0.50 <br /> Ethylbenzene ug/l ND 1 .8 ND 1 .8 ND 0.50 <br /> Xylenes ug/l ND 4.8 ND 4.8 ND 1 .5 <br /> q Recovery: 72 <br /> RPD: 28 ' <br /> oncentrations re t d as ND were not detected at or above the reporting limit. <br /> Louis W. DuPuis <br /> �ua��t�y Ass�ir�nce/,gual ity Control Manager <br /> Founding Member of the Associate n o a itornia esrrng t b ratortes <br />