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�l <br /> Unocal #0123 page 2 <br /> 1034 S. Central Ave , Tracy <br /> This site is required to continue in its investigative efforts and determine the <br /> lateral and vertical limits of the contamination from the underground tanks <br /> A work plan that addresses the above noted concems should be submitted to <br /> PHS-EHD for review A receptor survey for all wells, conduits, utilities, and <br /> underground potential preferential pathways should be completed for this site, <br /> Groundwater monitoring should continue an a quarterly basis and should <br /> include EPA Methods 8015m, 8020, and 8260 for every well, every quarter <br /> Continue to sample for solvents, oil and grease, and metals in the groundwater <br /> until PHS-EHD has determined that a zero line has been established This data <br /> should help your consultant determine where and how many additional wells and <br /> borings may be needed <br /> Recommendations and conclusions must be included in each and every <br /> Quarterly Monitoring Report and the current site status and future plans <br /> should be discussed by the registered professional you have hired to <br /> manage the site. <br /> PHS-EHD will expect a discussion of these concems in the next monitoring <br /> report Without this inclusion in the next report, you may expect a directive that <br /> will require a work plan submittal within ninety (90) days of the report submittal <br /> date. <br /> I hope this clarifies PHS-EHD`s evaluation of this site Please direct any <br /> questions you may have to Michael Infuma at (209) 468-3454 <br /> Donna Heran, REHS, Director <br /> Environmental <br /> Health Division <br /> Michael J In#uma Jr , Senior REHS Margare l_agono, REHS <br /> LOP/Site Mitigation Unit IV Supervisor <br /> MI/ <br /> c Wells Fargo Bank -A. Barbour, 111 Sutter St„ 22"a Fir, S F,, 94163 <br /> C, Pacific Envir Grp - J Muzzio, 2025 Gateway PI , #440, San Jose, 95110 <br /> C, CVRWQCB - Pat Anderson <br /> Z00 d 18L£ bb6 019 131 3H HINON 1H30 '1VOON11 02 60 M1186 ,91-,91- KIP <br />