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rt r�r r r r r rr r r r r r rr r r r� rr <br /> 7 EI <br /> SUMMARY OF GROUNDWATER ELEVATION AND ANALYTICAL DATA <br /> SHOP 10 MAINTENANCE STATION <br /> STOCKTON,CALIFORNIA <br /> TOC <br /> Depth Ta Ground Ethyl- Tolai <br /> TPH-G TPH-D Benzene Toluene 11178E <br /> Well LD Date Ground- Water Benzene Xylenes <br /> Elevation Water Elevation (1w6/1) (µ8�} (ILA WA) Benzene <br /> (pg/I) <br /> MW-25 10/23/1996 2195 5990 -3795 60 <50 5 0 so to 61 <0 5 <br /> MW 25 1 05/22/1997 2195 5484 -3289 <500 <500 <0 3 1 <0 3 <0 6 <0 6 <06 <br /> MW-25 09/25/1997 2195 $728 3533 <500 <500 <0 3 <0 3 <0 6 <0 6 <0 6 <br /> MW-25 12/29/1997 2195 5642 3447 <50 <5000 <0 5 <0 5 <05 <1 <5 <br /> MW 25 03/1611998 2195 5284 3089 <50 <50 <0 5 <0 5 <0 5 <I <5 <br /> MW 25 06/15/1998 21 95 4919 -2724 <500 <5000 <0 3 <0 3 <0 6 <0 6 <5 <br /> MW 25 08125/1998 21 95 49 78 -2783 <500 <5000 <0 3 <0 3 <0 6 <0 6 1 <06(< 0) <br /> MW 25 12/02/1998 2195 4926 -2731 <500 <400 18 20 2 110 <1 0(<I 0) <br /> MW-25 04/01/1999 2192 45 89 -23 97 <100 <100 <0 1 -02 <0 I <0 I <06 <br /> MW-25 06/28/1999 21 92 4629 2431 <100 <100 <03 <0 2 <02 <0 4 <0 6 <br /> MW 26 10/24/1996 2121 5959 38 37 100 <50 <0 5 <0 5 <0 5 <0 5 5 1 <br /> MW-26 05/22/1997 21 21 5457 -3336 <500 <500 1 <0 3 <0 6 <0 6 <0 6 <br /> MW-26 09/25/1997 21 21 56 81 -3560 <500 <500 <03 <0 3 <0 6 <0 6 <0 6 <br /> MW 26 12/29/1997 2121 5616 -34 95 <50 <5000 <0 5 <0 5 <0 5 12 <5 <br /> MW 26 03/16/1998 2121 5261 -3140 <50 92 <0 5 <0 5 <0 5 12 <5 <br /> MW 26 06/15/1998 1 21 2148 83 -27 62 <500 <5000 <0 3 <0 3 <0 6 <0 6 <5 <br /> MW-26 08/03/1998 Well Abandoned -- — <br /> Notes <br /> TOC=Top of casing elevation MSL= Mean Sea Level <br /> TPH G=Total Petroleum Hydrocarbons as Gasoline by EPA Method 8015M <br /> TPH D=Total Petroleum Hydrocarbons as Diesel by EPA Method 8015M <br /> BTEX=Benzene Toluene Ethylbenzene and Total Xylenes by EPA Metbod 8020 <br /> MTBE=Methyl Tertiary Butyl Ether by EPA Method 8020 <br /> <=Less than method detection limit <br /> — =Not measured sampled tested or present <br /> All groundwaln Icvel urcasurunuus Are p LWIVILd nt fid <br /> m611=milllbrams per liter <br /> N6A=micrograms per liter <br /> (<5)=MTBE concentration as calculated by EPA Method 8260 <br /> 1 Denotes MTBE samples analyzed by EPA Method 82608 <br /> i <br /> NR denotes Not Reported <br /> A J"after the laboratory result Indicates that the compound was detected above the method detection limit but below the laboratory reporting limit <br /> All data prior to 311199 was provided by the previous consultant(PSI) <br /> IN'R 2AhV10FIs <br /> Page 8 of 8 <br />