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STEFFEN ROBERTSON AND KIRSTEN <br /> January 27, 1993 <br /> Mr. Frank Biehler <br /> ' City of Lodi <br /> Public Works Department <br /> 1331 South Ham Lane <br /> ' Lodi, California 95242 <br /> Re: Disposal of One 55-gallon Drum of Water Resulting from Groundwater Monitoring <br /> Diamond Lumber facility, Lodi, California <br /> Dear Mr. Biehler: <br /> Pursuant to our phone conversation on January 26, 1993, regarding disposal of the above referenced <br /> material into the City of Lodi sewer system, Steffen Robertson and Kirsten (U.S.) Inc., (SRK) is <br /> providing your department with the following information. SRK has been retained by the 650 <br /> Management Corporation (current management of Diamond Lumber, Inc.) to perform the quarterly <br /> groundwater monitoring of three monitoring wells installed by SRK at the above referenced facility. <br /> The three groundwater monitoring wells were installed by SRK in November, 1991, under the direct <br /> guidance of Ms. Margaret Lagorio, Senior RENS, San Joaquin County Public Health <br /> Services/Environmental Health Division (PHS/EHD). One 55-gallon drum of water has been <br /> generated from groundwater monitoring activities at the site. <br /> ' The following table includes all of the available data for the monitoring wells installed by SRK in 1991. <br /> The analytical parameters include volatile hydrocarbons (by EPA 8015M, GC/FID Purge & Trap), <br /> benzene, toluene, ethylbenzene, and xylene (BT-EX) (Aromatics by EPA 60218020, GC/PID Purge & <br /> Trap); and total lead (EPA Method 239.2 GFAA). Low levels of toluene were only detected during <br /> the November 1991 sampling event at concentrations of 0.82 ppb and 0.63 ppb, while concentrations <br /> of lead range from 12 ppb to 260 ppb. The drum contains well purge waters from all the monitoring <br /> events listed below. <br /> Analytical Groundwater Data <br /> 1 <br /> : ........... NaOmber.2S'<1991 <br /> .. .. ,:.. <br /> SRK <br /> SRK...<' SRS.. SRS.: :SRK. :;SRS. ':SWS:: <br /> Mt?Vl MW2 MW3 MVKI MW2 MW3 MW1 MWL MRf3'> <br /> Volatile Hydrocarbons ND ND ND ND ND ND ND NS ND <br /> ' Benzene ND ND ND ND ND ND ND NS ND <br /> Toluene ND 0.82 ppb 0.63 ppb ND ND ND ND NS ND <br /> Eth lbcnzene ND ND ND ND ND ND ND NS ND <br /> Xylenes ND ND ND ND ND ND ND N5 ND <br /> Lead 53 b ND ND 33 b 260 b 93 b 12 b NS 170 b <br /> NOM: <br /> NS =Not sampled because of slow recharge after purging resulting in an insufficient quantity of water necessary for sampling. <br /> ND = Analytcs reportcd as ND were not present above detection limits(limits on next page). <br /> Steffen Robertson and Kirsten (U.S.) Inc. <br /> 15311 NE 90th Street, Redmond, Washington, 98052, U.S.A. <br /> Tel. (206) 881-2233 Facsimile(206)881-1581 <br /> Other Offices in: U.S.A., Canada, United Kingdom and Africa <br />