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<br /> �.. 4491 Wcat Durham Farcy Road,Tracy,Gltfarnia
<br /> DJta P-JM No.40-91-732
<br /> Page 3
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<br /> TREBLE:4
<br /> Chemical Analysis of(wound Water Samples
<br /> Concentrations in Microgramsr Liter
<br /> 1� jug/l(ppb)
<br /> Samaln
<br /> Data
<br /> 1 MW-1 09/04/91 23 1.3 <0.5 3.5 <0.5 <0,5 140
<br /> MW-2 04/04/91 7 i 0 700
<br /> 3 - 130 1,300 <0.5 <0.5 6,400
<br /> MW-3 09/04/91 <0.5 <0.5 <0.5 <0.5 <0.5 <0.5 <50
<br /> s Domestic 09/04131 <0.5 <0.5 <0.5 <0.5 <0,5 <0.5 <50
<br /> 7 Well . .
<br /> Resalts o€the chemical anal
<br /> yscs of TPFT ns gasoline for the"soil sample c'Ilected from a depth of 5 feet in
<br /> monitoring well hINV--2 indicated low concentrations of petroleum hydrocarbon constituents were present.
<br /> kChemical results of the soil sample collected from monitorin well
<br /> g MI-2 indicated petroleum constituents
<br /> 4 �•' were below the laboratory's limit of detection.
<br /> F
<br /> Rcsults or the chemical analyses for ground water collected from monitoring well RTW-3 and the dorwstic
<br /> r water uti0 indicated concentrations ofpetroleum collstitaents wcM below the labour Cory's lirlit of detection.
<br /> r
<br /> Me ground water sample collected from monitoring wells MW-R and MW-2 contained the concentrations
<br /> Of petroleum constituents.
<br /> 1.
<br /> I Based on the findings of this,:e
<br /> 1 ! port,Delta recommends tf;�,i lite sell in the Previously existing tank locations
<br /> (1 and 2, figure 2)be excavated to a depth of 11 fee'.L-A aerated on slte.
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