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' Diamond Lumber•Lodi Drum Disposal page 2 <br /> Detection Limits: <br /> Volatile Hydrocarbons 50 ppb (during November 1991 &April 1942 sampling events) <br /> Benzene 0.02 ppb(dung August 1992 sampling event) <br /> Toluene 0.5 ppb <br /> Ethylbertzene 0.5 ppb <br /> Xylenes 0-5 ppb <br /> Lead 5 ppb (during November 1991 & April 1992 sampling events) <br /> 1 ppb (during August 1942 sampling event) <br /> ' <br /> Organic and inorganic analyses were performed by California certified laboratories in accordance with <br /> PHS/EHD guidelines. Pursuant to your request, copies of the analytical data and chain-of-custody are <br /> ' enclosed. <br /> On behalf of our client, SRK requests permission to dispose of one 55-gallon drum of non-hazardous <br /> ' water into the City of Lodi public sewer system during the upcoming quarterly monitoring event <br /> scheduled for February 4 and 5, 1993. Please contact me or Rob Gwilynt at your earliest convenience. <br /> ' With regards, <br /> ' STEFFEN ROBERTSON AND KIRSTEN (U.S.) INC. <br /> Rob Gwilym, C.P.G. <br /> Principal, Senior Environmental Geoscientist <br /> ' David Schwieger <br /> Environmental Hydrogeologist <br /> ' DS/sal <br /> Enclosure <br /> ' cc: Ann Arney - 650 Management Corporation <br /> 1 <br /> 1 <br /> Steffen Robertson and Kirsten <br />