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Fourth Quarter 1992 Mondonng Report <br /> Knowles Property, Stockton, CA <br /> January 28, 1993 <br /> W03'37 <br /> Laboratory Results <br /> Laboratory analysis indicated that the sample collected from well MW-1 contained benzene (22 <br /> ppb), toluene (0 7 ppb), ethylbenzene (4 1 ppb), xylenes (4 5 ppb), and TPHG (1,100 ppb) <br /> The sample collected from well MW-2 indicated elevated levels of toluene (1.3 ppb), xylenes <br /> (0.5 ppb), and TPHG (670 ppb). All other analytes in MW-2 were not detected at or above <br /> method detection Iimits (nondetectable) The sample collected from well MW-4 was reported <br /> to contain benzene (18 ppb), toluene (0.7 ppb), xylenes (0 7 ppb), and TPHG (410 ppb); <br /> ethylbenzene was nondetectable. The sample collected from well MW-5 was reported to contain <br /> benzene (630 ppb), toluene (4 10 ppb), ethylbenzene (200 ppb), xylenes (1,100 ppb) and TPHG <br /> (20,000 ppb) The sample collected from well MW-7 contained toluene (0.9 ppb) and xylenes <br /> (0.7 ppb); all other analytes were nondetectable. The samples collected from wells MW-6 and <br /> MW-8 did not contain any analytes at or above method detection limits. The laboratory results <br /> are summarized in Table 2. The laboratory data sheets, chain of custody documentation, and <br /> laboratory QA/QC are included in Attachment 2. <br /> RESNA will continue with the quarterly sampling program; the next round of sampling is <br /> scheduled for March 1993. If you have any questions or comments regarding this report, please <br /> . contact Bill Channell at (209) 838-3507. <br /> Respectfully, <br /> RESNA Industries, Inc <br /> Sharon A. Young <br /> Microbiologist <br /> Bill Channell <br /> Senior Geologist <br /> Gregory P Stahl <br /> CA Registered Geologist No 5023 <br /> Attachments <br /> PC Mr Ted Knowles <br /> Mr Ted Job <br /> QRTERLYIQRo11593 FNL 2 <br />