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s � � TABLE 1-SUMMARY OF RESULTS OF GROUNDWATER SAMPLING _ BP OIL COMPANY SERVICE STATION NO.11192 1403 COUNTRY CLUB BOULEVARD,STOCKTON,CALIFORNIA ALISTO PROJECT NO.10-037 WELL DATE OF CASING DEPTHTO GROUNDWATER TPH-G B T E X MTBE DO LAB ID SAMPLING/ ELEVATION (a) WATER ELEVATION (b) (ugA) (ugA) (ugA) MA) (ugA) (V) (ppm) MONITORING (Feet) (Feet) (Feet) QC-2 (g) *109/92 - - - ND<50 ND<0.5 ND<0.5 ND<0.5 ND<0.5 - --- ANA QC2 (g) 03/11/93 --- - - ND<50 ND<0.5 ND<0.5 ND<0.5 ND<0.5 - --- PACE QC-2 (g) 06/15/93 - - - ND<50 ND<0.5 ND<0,5 ND<0.5 1.3 -- -- PACE QC-2 (g} 09/15/93 --- - - ND<50 ND<0.5 ND<0.5 ND<0.5 0.7 - --- PACE QC-2 (g) 12012/93 - - - ND<50 ND<0.5 ND<0.5 ND<0.5 ND<0.5 --- PACE OC-2 (g) 04/01194 --- - - ND<50 ND<0.5 ND<0.5 ND<0.5 ND<0.5 - - PACE QC-2 (g) 0727194 --- - - ND<50 ND<0.5 ND<0.5 ND<0.5 ND<0.5 - PACE OC-2 (g) 11/30/94 - --- - ND<50 ND<0.5 ND<0.5 ND<0.5 ND<0.5 - - PACE QC-2 (g) 02/15/95 - - - ND<50 ND<0-50 ND<0.50 ND<0.50 ND<1-0 - ATI Q-2 (g) 0421/95 - -- --- ND<50 0.8 1.5 ND<0.50 ND<1.0 --- - ATI OG-2 (g) 07/19/95 - --- --- ND<50 ND<0.50 ND<0,50 ND<0.50 ND<1.0 --• - ATI OC-2 (g) 10010/95 --- -- - ND<50 ND<0.50 ND<0.50 ND<0.50 ND<1-0 ND<5.0 - ATI ABBREVIATIONS: NOTES: TPH-G Total petroleum hydrocarbons as gasoline (a) Casing elevations surveyed to the nearest 0.01 foot B Benzene relative to mean sea level on August 20,1991. T Toluene E Ethylbenzene (b) Groundwater elevations in feet relative to mean sea level. X Total xylenes MTBE Methyl tert butyl ether (c) Well covered by landscaping. DO Dissolved oxygen ugA Micrograms per liter (d) Blind duplicate. PPM Parts per million NO Not delected above reported detection limit (e) Sample collected before purging. Not applicable/measuredlanalyzed PRE Predsion Analytical Laboratory (i) Well destroyed on February 5,1991. ANA Anametrix,Inc. PACE Pace,Inc. (g) Travel blank. ATI Analytical Technologies,Inc. F 10110-037§0 37-5-2.W 41 I I 05,Jan-96 PAGE 4