SITE INFORMATION AND CORRESPONDENCE FILE 1

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HEALTH SEREVICESPUBLIC SAN JOAQUIN COUNTY .� ENVIRONMENTAL HEALTH DIVISION Karen Furst, M.D., M.P.H., Health Officer.. ��FUR 304 East Weber Avenue,Third Floor • Stockton, CA 95202 209/468-3420 SOUTHLAND CORPORATION DEC 19 2001 BOB DeNINNO 10220 SW GREENBURG RD STE 470 PORTLAND OR 97233 RE: 7 Eleven Store #14117 Site Code:1073 2725 Country Club Blvd. RO#:0000013 Stockton, CA., 95204 CUF#: 015013 San Joaquin County Public Health Services, Environmental Health Division (PHS-EHD) has reviewed the "Report on Additional Site Assessment and Recommendations" dated December 12, 2001 as submitted by IT Corporation (IT) on December 17, 2001 and has the following comments. This report covered the October 30, 2001 installation of monitoring wells onsite MW-5, and offsite MW-6 and MW-7. Two soil samples were collected from each boring and laboratory analyses have confirmed that only a slight Xylene detection was found in MW-7 at 20 feet below the surface. PHS-EHD concurs with your consultants conclusion that the petroleum contamination to the west, northwest and the south has been delineated. After comparing this data with data included in the "Well Installation Report" dated August 12, 1999 by IT, it appears you have effectively defined the core area of the soil contamination and have a good start on defining the petroleum limits in the groundwater beneath the site. Recommendations included within the latest report suggested continued quarterly monitoring, a `well survey', an eight hour dual-phase high-vacuum (DPHV) test utilizing the monitoring wells within the identifiable core area, and possibly installation of additional wells (soil vapor extraction) in the future. PHS- EHD concurs with these recommendations. A work plan to enact these proposals should be submitted immediately to PHS-EHD for review. In previous PHS-EHD correspondence (May 14, 2001) a deadline was established for the submittal of the Problem Assessment Report (PAR). This June 28, 2002 deadline remains in effect. Other deadlines established in that correspondence were not met and PHS-EHD approved an extension request for the due date for this latest report. PHS-EHD advises that adequate steps should be taken now to ensure that the PAR submittal date is met. Extensions will only be approved for extenuating circumstances beyond your control. Responsible parties that fail to meet directives issued by PHS-EHD will jeopardize their ability to remain eligible to receive reimbursement from the State Water Resources Control Board Clean Up Fund and could subject themselves to formal enforcement action. A Division of San Joaquin County Health Care Services