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Diamond Lumber-Lodi Drum Disposal Page 2 <br /> Detection Limits: <br /> Volatile Hydrocarbons 50 ppb (during November 1991 & April 1992 sampling events) <br /> Benzene OM ppb (during August 1992 sampling event) <br /> Toluene 0.5 ppb <br /> Ethylbenzene 0.5 ppb <br /> Xylenes QS ppb <br /> Lead 5 ppb (during November 1991 & April 1992 sampling events) <br /> 1 ppb (during August 1992 sampling event) <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 /> 1 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 Gwilym at your earliest convenience. <br /> With regards, <br /> STTJEEFFEN 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 /> i <br /> r <br /> ' Steffen Robertson and Kirsten <br /> srsa,r.,n�n i...uu <br />