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San Joaquin County DIRECTOR <br /> Donna Heran,REHS <br /> oPQ�I"' Environmental Health Department ASSISTANT DIRECTOR <br /> Laurie Cotulla,REHS <br /> 600 East Main Street <br /> Stockton, 'California 95202-3029 PROGRAM COORDINATORS <br /> Cart Borgman,REHS <br /> Mike Huggins,REHS,RDI <br /> Website: www.sJgov org/ehd Margaret L.egorlo,REHS <br /> Phone: (209)468-3420 Robert McCletlon,REHS <br /> Fax: (209)464-0138 ,teff carroesco,REHS,RDI <br /> Kasey Foley,REHS <br /> August 21, 2008 1 <br /> Mr. Thomas Sexton Mr. Eric Schneider1�+4t o <br /> Ultramar Inc. Auburndale Properties <br /> 685 West Third Street 295128 th Street, Suite 2050 <br /> Hanford, CA 93230 Santa Monica, CA 90405 <br /> Subject: Beacon #3641 APN: 094-030-12 <br /> 1210 E. Hammer Lade ROM 070 <br /> i Stockton, CA 95210 Geotracker ID#: T0607700492 <br /> a <br /> F The San Joaquin County Environmental Health Department (EHD).has reviewed Quarterly <br /> Ground water Monitodng/Remediation System Report dated July 20, 2008, prepared by Horizon <br /> I ; Environmental, received on Geotracker and has the following comments . <br /> `This report covered the sampling of five of the thirteen monitoring wells.and two of the eight <br />' vapor wells on June 28, 2008. The wells were sampled according to a program.proposed by <br /> Horizon Environmental in 2003 and approved by the EHD. <br /> ` Based on the low levels of petroleum constituents detected, in these , wells, Horizon <br /> Environmental has recommended that,,"active remediation be discontinued and if concentrations <br /> 5 of hydrocarbons in ground.water continue a naturally declining.trend the site be considered for <br /> low risk closure." <br /> T . <br /> I he EHD concurs with.the request to discontinue active remediation at this site with the <br /> following understandings and conditions: <br /> • With the remedial process discontinued, the previously. approved modified sampling <br /> program will also be discontinued. Quarterly monitoring, sampling and reporting are <br /> required for all well casings with:ground water in them for all constituents sampled at this <br /> site before the modification was approved. <br /> • A soil vapor intrusion evaluation is required for this site before a request for no further <br /> action is submitted to the EHD.. Recent changes in the Central Valley'Regional Water <br /> Quality Control,Board (CVRWQGB) closure evaluation requires that soil vapor samples <br /> be collected for this evaluation and evaluated against the San Francisco Bay'Regional - <br /> Water Quality Control Board (SFBRWQCB) Environmental Screen Levels (ESL). The <br /> EMD recommends you submit a work plan to collect soil vapor samples immediately. <br /> i <br /> r, <br /> FLE <br /> COPY <br />