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!4 ERM-West,Inc <br /> i 1777 Botelho Drive <br /> S Suite 260 <br /> Walnut Creek,CA 94596 <br /> (510)946-0455 <br /> ` 4 (510)946-9968(Fax) <br /> March 3, 1997 F <br /> R MAR 0 5 1997 <br /> ENVIRONME�JkL H1=AL)H <br /> Ms. Mary Meays PERMIT / SERNfICES <br /> Senior REHS <br /> ` San joa jiin Count`Public Heat Se vac <br /> Environmental HbAlth Nvik6zi, <br /> 445 North San jo4gto Street ERM <br /> " Stockton,CA 95241 <br /> SUBJECT-. -3rd Quarter 1996 Crqund Water Monitoring Event <br /> 132 & 1,515 West Weber AVe:i`ue <br /> AA - Stockton, California <br /> Dear Ms,Meays <br /> On behalf of Catellus peyel aMont Corporation (Catellus), ERM-West,Inc, <br /> (t" is please4jo submit this letter suint`a ing t14"''esults of the 3rd Quarter <br /> A 1006 Gkourtd Water Monrtonng Event recen11c¢nducl6d at Catellus' properties'} <br /> 9 at 13f$ and 15Y5,W jst Weber Avenue in Stockton{ California <br /> Field activities were conducted from October 10 through October 14, 1996, and <br /> ' included:` measurixi&water levels, sampling the ten onsite wells (Figure 1), �ni d <br /> mstaing Oxygen Rolease Compound (ORC) socks in selected wells The field <br /> procedures are described below, followed by a discussion of the water level <br /> mgasuremeuts and analytical results <br /> FIELD PROCEDURESIOBSERVA FIONS <br /> ' Water levels and,total depths were rneasdii 4pri<or to sampling between <br /> approxinnately 9;20 a,m and 10 20 a m on October 10, 1996: Water levels - <br /> ,measured during-'this sampling evens,are presented in Attachment A After <br /> ' measuring wate�,4 vels,each W611�was systematically purged of three cas"utg <br /> volumes, and gxoutid water sadplos Were collected and placed'mto containers ' <br /> appropriate for the analysis bf interest (Fe+2, pH, Conductivity,Niltrate, Chl6nde, <br /> �'�Dtssolved Methane,Dissolved COZ, BTEC, Trimethylbenzene, TPH{g);TPH(d), <br /> �--1 i solved Mrr) -Pii reboy'dslfx61notes associated with the sampling event <br /> are presented in Attachnient B The sample containers were labeled `- T t <br /> o appropriately ane`l maintained m chilled coolers until they could be transported ' <br /> #o the laboratory <br /> A member of the Environmental <br /> +urces Management Group <br />