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Phase 11 Environmental Site Assessment
<br /> Mountain House Neighborhood G
<br /> July 9,2002
<br /> Page 4
<br /> Table I, on page 5. Laboratory report sheets indicating analytical methods used, detection limits, and the
<br /> results of the analyses are included in Appendix A.
<br /> 6.2 DISCRETE SAMPLES
<br /> The laboratory analytical results indicate the organophosphorus pesticides azinphos-methyl, bolster,
<br /> chlorpyrifos, coumaphos, demeton, diazinon, dimethoate, disulfoton, ethoprop, ethyl parathion, famphur,
<br /> fensulfothion, fenthion, merphos, methyl parathion, mevinphos, O,O,Ozriethylphosphorothioate,
<br /> tetrachlorvinphos, thionazin, tokuthion, and thrichloronate were detected in at least one of the discrete soil
<br /> samples analyzed for these constituents. The concentrations of bolstar, chlorpyrifos, demeton, diazinon,
<br /> dimethoate, disulfoton, ethyl parathion, famphur, fensulfothion, mevinphos, tetrachlorvinphos, and
<br /> tokuthion detected in the discrete samples are below the laboratory reporting limits and are estimated
<br /> concentrations. Ethoprop was detected at concentrations as high as 15 micrograms per kilogram (Mg/kg),
<br /> fenthion at 30 µg/kg, merphos at I I Itg/kg, methyl parathion at 19 Itg/kg, 0,0,0-triethylphosphororthioate
<br /> at 12 µg/kg, thionazin at 12 gWkg, and trichloronate at 30 gg/kg. Azinphos-methyl, coumaphos, and
<br /> dimethoate were detected at reportable levels in the method blank. Laboratory analytical results of the
<br /> discrete samples are summarized in Table 2, on page 6. Laboratory report sheets indicating analytical
<br /> methods used, detection limits, and the results of the analyses are included in Appendix A.
<br /> n
<br /> �� CONDOR
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