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TABLE 1-SUMMARY OF RESULTS OF GROUNDWATER SAMPLING ' <br /> BP OIL COMPANY SERVICE STATION NO.11193 <br /> 3202 WEST HAMMER LANE,STOCKTON,CALIFORNIA <br /> ALISTO PROJECT NO.10-136 <br /> WELL DATE OF CASING DEPTH TO GROUNDWATER TPH-G TPH-D TPH B T E x HVOCS LAB <br /> ID SAMPUNGI ELEVATION (a) WATER ELEVATION (b) (ppb) (ppb) (ppb) (ppb) (ppb) (ppb) (ppb) (ppb) <br /> MONITORING <br /> MW-1 12121192 3.66 20.40 -16.74 2200 56 15 ND<0.5 8.9 -- - <br /> MW-1 04/04/93 3.66 15.51 -11.85 160 - -- 9.2 ND<0.5 ND<0.5 0.6 _ PAC <br /> MW-1 04/26/93 3.66 17.25 -13.59 --- -- --- - -- - <br /> MW-2 12/21/92 4.51 21.26 -16.75 1500 - 120 9.6 1.0 24 -- --- <br /> MW-2 04/04/93 4.51 18.45 -13.94 2600 - 460 (c) 13 77 81 _ PAC <br /> MW-2 04/26/93 4.51 18.11 -13.60 --- -- --- --- --- <br /> MW-3 12/21/92 4.66 21.52 -16.66 170 -- - 2.8 ND<0.5 ND<0.5 ND<0.5 -- -- <br /> MW-3 04/04193 4.86 18.59 -13.73 270 --- -- 23 ND<0.5 ND<0.5 ND<0.5 - PAC <br /> MW-3 04/26193 4.86 18.34 -13.48 --- - - ---- ---- --- <br /> MW-4 12/21/92 5.12 21.68 -16.56 110 -- -- ND<0.5 ND<0.5 ND<0.5 ND<0.5 <br /> MW-4 04/04/93 5.12 18.80 -13.68 180 -- - 1.1 ND<0.5 ND<0.5 0.9 ND (d) PAC <br /> C <br /> QC-1 (e) 04/04/93 ---310 - - - 1.9 ND<0.5 ND<0.5 0_9 PA <br /> -_ A <br /> MW-4 04/26193 5.12 18.55 -13.43 -- ND<50 ND<5000 -- -- -- <br /> QC-2{f) 04/04/93 --- - -- ND<50 -- -- ND<0.5 ND<0.5 ND<0.5 ND<0.5 - PAC <br /> ABBREVIATIONS: NOTES: <br /> TPH-G Total petroleum hydrocarbons as gasoline (a) Casing elevations surveyed to the nearest 0.01 foot relative to mean sea level. <br /> TPH-D Total petroleum hydrocarbons as diesel <br /> TPH Total petroleum hydrocarbons-EPA 418.1 <br /> B Benzene (b) Groundwater elevations in feet above mean sea level. <br /> T Toluene <br /> E Ethylbenzene (c) A peak eluting earlier than benzene and suspected to be methyl tart <br /> X Total xylenes butyl ether was detected in sample collected from MW-2 at approximately 460 ppb. <br /> HVOCS Halogenated volatile organic compounds <br /> ppb Parts per billion (d) HVOCs not detected at or aboved reported detection limits ranging from 0.5 to 2.0 ppb. <br /> Not measured/analyzed/available <br /> ND Not detected above reported detection limits (e) Blind duplicate of sample collected from MW-4. <br /> PACE Pace,Inc. <br /> (f) Field blank. exwsorePaxn0-136-1.wo+ <br /> PAGE 1 <br /> 03-May-93 <br />