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TABLE B 3 <br /> Laboratory Results (Soil/Geoprobe) <br /> B r E X MTBE TPH-G TEPH <br /> Detection 90 50 50 50 50 10 10-10 <br /> Sample 1 D Limits µg/kg µg/kg pg/kg µg/kg mg/kg 4g/kg mg/kg <br /> 1432-OPI-9 ND NDT ND ND D ND ND <br /> 1432-(2P2-11 ND ND ND ND ND ND 45 (motor oil ranger) <br /> 1432-(iP-3-10 ND ND ND ND 14 ND 39(motor oil rang(,") <br /> 1432-(iP4-5 920 1 500 ND(100) ND(l00) 14 000 28 55 (motor oil range') <br /> 1432-C7P5-1i ND ND ND ND ND ND ND <br /> I Unit Conversions Analytical <br /> ui:/kg parts pas billion(ppb) BTEX=benzene, toluene ethyl benzene and total xylenes <br /> mg/kg parts per million(ppm) \4TBU-methyl tertiary butyl ethos <br /> TPH-G total petroleum hydrocarbons quantitnA as gasoline <br /> F1 PH=total extractable petroleum hydrocarbons quantified as diesel motor oil <br /> and kerosene <br /> ND none detected at or above laboratory detection limits <br /> (100)=detection limits raised due to gasoline interfi- mnee <br /> (motor oil range 7)=organics detected within tht motor oil range however <br /> do not match the motor oil pattern <br /> TABLE B 4 <br /> Chemical Analyses (Groundwater/Ge©probe) <br /> B T L X MTBE TPH-G TFPH <br /> Detection 03 03 03 06 10 005 0 05-0 5 <br /> Sample I D Limits µg/1 µg/1 µg11 µg/l µg/I µg/I mg/l <br /> 1432-GP1-8/29/96 ND 03 ND ND ND ND ND <br /> 1432-(,P2-8/29196 04 06 Nil 06 ND ND ND <br /> 1432-GP4-8/29/96 69 600 66 400 1,300 27 ND <br /> L1432-GY5-8129196 ND NU ND ND 'SID ND ND <br /> Unit Conversions Analytical <br /> µg/1 parts per billion(ppb) B fE.X=benzene toluene ethyl benzene and xylene <br /> mg/l parts per million(ppm) MTBE=methyl tertiary butyl ether <br /> TPH-G=total petroleum hydrocarbons quantified as gasoline <br /> TFPH total extractable petroleum hydrocarbons quantified as diesel motor oil, <br /> and kerosene <br /> ND- none detected at or above the reported laboratory detection limits <br /> Based on the results of the Geoprobe investigation, Condor recommended that monitor wells be installed at the <br /> site to investigate and monitor the lateral extent of the gasoline and diesel contamination plume (reference - Soil <br /> and Groundwater Investigation Report, prepared by Condor, dated September 30, 1996) Mr Ronald Rowe of <br /> the PHS/ElfD approved the proposal for the monitor well installation in correspondence to Condor, dated <br /> February 6, 1997 Condor subsequently prepared the Work Plan for Monitor Well Installation, dated May 30, <br /> 1997 As described in Section 1 0 of this report, the Work Plan was approved by the PHS/ETID and the <br /> Reclamation District in July, 1997 <br /> I <br />