SITE INFORMATION AND CORRESPONDENCE_1998-2000

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SERACES PUBLIC AEALTHr, SAN JOAQUIN COUNTY ' ENVIRONMENTAL HEALTH DMSION Karen Furst, M.D., M.P.H., Health Officer 304 East Weber Avenue,Third Floor • Stockton, CA 95202 209/468-3420 NOV 2 41999 ROBERT A BOUST ED KOBERSTEIN UNOCAL CORPORATION MONTGOMERY WARD & CC INC 2000 CROW CANYON PLACE STE 400 1331 S HARBOR BLVD SAN RAMON CA 94583 FULLERTON CA 92632 RE: Meeting on November 17, 1999 5400 & 5606 Pacific Ave. COPY Stockton, CA., 95207 On November 17, 1999, a meeting was held at San Joaquin County Public Health Services, Environmental Health Division (PHS-EHD) to discuss the status of the above noted sits and the petroleum hydrocarbon impact to the irrigation water well located on the San Joaquin Delta College (Delta College) campus. The conclusions reached are discussed herewith. Both responsible parties (RP) for the sites agreed that the plumes of the groundwater contamination are over-lapping. It was requested that PHS-EHD evaluate and provide oversight for these sites as having "co-mingled" groundwater plumes. PHS-EHD approved the request and encouraged the RPs to proceed with an application to the State Water Resources Control Board (SWRCB) Clean Up Fund (CUF) as "co-mingled" plume sites for reimbursement of corrective action costs. It was agreed that quarterly groundwater monitoring and reporting will continue for each site for the Fourth Quarter -1999. A complete report is to be submitted for each site to P S- EHD in a timely manner. Montgomery Wards is to submit Remediation Status Repons on a quarterly basis starting with the Fourth Quarter - 1999. Starting with the Second Quarter - 2000 and continuing until directed otherwise, both sites will submit groundwater monitoring data in one report on a "bi-annual" schedule (June and December). It was also agreed that information about the operation and distribution system of the elta College irrigation well are needed to evaluate alternatives for the continued use (well head treatment) or water source replacement of this well. Enclosed is a copy of Montgomery Ward's consultant's 1997 request to Delta College for information. PHS-EHD will request that Delta College provide the information so alternatives for the well can be evaluated. It was understood that the effects of Montgomery Ward's current active remediation system (soil vapor extraction/air sparging) would be closely monitored with respect to the groundwater quality at Unocal's "plume-core" area (MW-10, 11, 19S, & 19D). PHS-E HD requested that should data indicate that this area is unaffected by the Montgomery Ward's A Division of San Joaquin County Health Carc Serviccs