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TABLE 1-SUMMARY OF RESULTS OF GROUNDWATER SAMPLING BP OIL COMPANY SERVICE STATION NO.11195 16500 SOUTH INTERSTATE 1-5,LATHROP.CALIFORNIA ALISTO PROJECT NO.10-151 WELL DATE OF CASING DEPTHTO GROUNDWATER TPH-G TPH-D B T E X MTBE TOG WOOS DO LAB ID SAMPLING! ELEVATION(a) WATER ELEVATION (b) (ugA) (ugA) (1-194) (1-194) (ugA) (ugA) (1-194) 00) (ug4) (ppm) MONITORING (Feet) (Feet) (Feet) MW-6 09/15/93 1356 8.98 4.58 400 - 2.4 ND<0.5 ND<0.5 ND<0.6 - - -- PACE MW-6 01/12/94 13.56 9.62 3.94 670 --- NM 5 ND<0.5 ND<0.5 ND<0.5 - - - 4.1 PACE MW-6 05/12/94 1356 8.95 4.61 5500 - ND<0.5 ND<0.5 ND<o.5 ND<0.5 - - - 4.2 PACE MW-6 10/07/94 13.56 9.72 3.a4 ND<50 - ND<0.5 ND<0.5 ND<0.5 ND4,5 -- - - 4.3 PACE MW-6 12)08194 13.56 9.88 3.68 $00 - ND<0.5 ND4.5 ND<0.5 ND<0.5 •- - - 4.6 PACE MW-6 02/21/95 13.56 7.60 5.96 990 - ND<0.50 ND<0.50 ND<0.50 ND<1.0 - - 8.0 ATI MW-6 06/09/95 1356 7.12 6.44 - --- - - - - - - -- -- -- MW-6 08/31/95 13.56 8.95 4.61 99 - NDd15O ND 0.50 ND4.50 ND<1.0 1900 - - 8.1 ATI MW-7 09/15/93 14.27 9.59 4.68 ND<50 - ND<0.5 ND<0.5 ND<0.5 ND<0.6 - - - •- PACE MW-7 (e) 01/13/94 14.27 - - - MW-7 (e) 05/12/94 14.27 - - - --- - - -• - - - - -- -- MW-7 (e) 10/07/94 14.27 - MW-7 (e) 12/08,194 14.27 - - MW-7 02121/95 14.27 821 6.06 ND40 - ND<0.50 ND<0.50 ND<0.50 ND<1.0 -- - -- 6.9 ATI MW7 (1) 06/09795 14.27 •-- - - -- - ... - - - - -- - -- MW-7 (1) 08/31/75 14.27 •-- - - - - - ... - - __ __ - - QC-2 (g) 05!171'93 - -- - ND<50 - ND<0.5 ND<0.5 ND<0.5 ND<1.0 - - - -- PACE QC-2 (g) 09/15/93 - - - ND<50 --- ND<0.5 ND<0.5 ND<OS ND<OS - - - - PACE OG2 (g) 01/12/04 - -- - N0<50 - ND<0.5 ND<0.5 ND<0.5 ND<0,5 - - - - PACE QC-2 (g) 45/1 W4 - - -- ND<SO --- ND<0.5 N04.5 ND<0.5 ND<0.5 - -- -- -- PACE CG-2 (9) 10/67/94 - - - ND<50 -- ND<0.5 ND<0.5 ND<05 ND<0.5 - - - - PACE OC-2 g 12708!94 - - - 52 -- 0.6 1,1 2.2 7.8 - - - -- PACE QC-2 �g; 02/21195 - - -- ND<50 -- ND<0.50 ND<0.50 ND<0.5o ND<1.0 - •-- A-n OC-2 (9) 06109!95 - - -• ND<50 -- ND<O50 ND<0.50 ND<O.SO ND<1.0 - - - - ATI OC-2 (g) OMI/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) Top of casing elevations surveyed in reference to San Joaquin datum, TPH-D Total petroleum hydrocarbons as diesel brass cap UV-34 at Mathey Road,45 loot north and 52 Feet west o1 cerltedine B Benzene (elevation of 12-50 feat above mean sea level.) T Toluene E Ethylbenzene (b) Groundwater elevations in feat above mean sea levet. X Total xylenes MTBE Mathyl tart butyl ether ic) Blind duplicate. TOG Total oil and grease HVOCs Halogenated volatile organic mnWund9 (d) Detection limits vary;see laboratory report DO Dissolved oxygen ugA Micrograms per liter (a) Well inaccessible due to road constnaciaNehicular traffic ppm Parts per million ND Not detected above reported detection limit (I) Well inaocesaible due to asphalt paving. Not analyzedlapplicaUskneasured PACE Pate,Inc. (9) Travel blank. ATI Analylicel Technologies Inc. E10110-1511151-4.1.WQ1 17-Nov-95 PAGE 2