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• TABLP2 t r ANALYTICAL RESULTS GROUNDWATER SHELL SERVICE STATION (WIC No 204-7524-2408) 4445 PERSHING AVENUE,STOCKTON, CALIFORNIA Monitoring Date Total Aromatic Volatile Organics EDB Total Lead Organic Coliform Well Petroleum (Ppb) (ppm) Lead Total/Fecal Hydrocarbons (ppm) (MPN1100 ml) Gasoline Benzene Toluene Ethyl- Total (Ppm) (ppm) (ppm) benzene Xylenes (PP-) (Ppm) MW-4 01/21/92 0 ti 0 0012 < 00012 000085 «0 01 0 012 04121/92 < < < < < «0 02 0 005 - - - 07/13/92 < < < < < --- <<0 005 -- - — 10/08/92 < < < < < -- 0 012 - - 01111/93 0 230 0 057 0 012 00013 00087 «0 005 -- 04/28/93 0 079 00036 < 00030 00062 --- --- --- 08/26/93 0 130 00047 000086 00035 00066 --- - 10/01/93 0 050 00026 < 000066 < - 11/22/93 0 055 00017 < < < --- 02/15/94 0 064 000059 < < < --- --- 05/10/94 < < < < < _ 08/16/94 < < < < < 11/10/94 < < < < < --- --- --- -- 03116/95* < < < < < --- -- MWAD 10/08/92 < < < < < _ --- --- --- ("DUP") 10/01/93 0 060 00029 < 000082 < --- --- 11/22/93 < 00015 < < < ' 02/15/94 0 055 00005 < < < - 05/10/94 < < < < < --- --- --- 08/16/94 < < < < < --- --- 11/10/94 < < < < < -- — 03/16/95* < < 00007 < < --- --- NOTES EDB - Ethylene dnbromide c Below Practical Quantitation Reporting Limits per?n Regional Board Staff Recommendations for Rehmenary Evaluation and Investigation of Underground Tank Sites (August 10 1990)(PQL for BTEC-0 0005 ppm TP11 u guobne and dural—0 05 ppm) MPN1100 ml Most probable Dunbar Per loo milliliters of sample = Not analyzed OBS Obstructed cc - less Dian indented detection hmiUmpn as indicated on laboratory aiuly4cal report D - Duplrcats sample • a Sample hold time(14 days)had expired by two days ppm Parts per million ppb - Parts per billion Rig- 9347 9016IMarch 1995