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PUBLIC TIEALTH <br /> SAN JOAQUIN COUNTY <br /> ENVIRONMENTAL HEALTH DIVISION _ p` <br /> Ernest M. Fujimoto, M. D., M.P.H., Acting Health Officer <br /> 304 E. Weber Ave., Third Floor • P. O. Sox 388 • Stockton, CA 95201-0388 <br /> 209/468-3420 <br /> RICHARD MOE AND LARRY MCLEANp3U <br /> M AND M AUTOMOTIVE FEB 0C u <br /> 60 E TENTH ST. <br /> TRACY CA 95376 <br /> RE: M and M Automotive SITE CODE: 2554 <br /> 60 E 10th St <br /> Tracy CA 95376 <br /> San Joaquin County Public Health Services, Environmental Health Division (PHS/EHD) has <br /> reviewed the January 10, 1997 Quarterly Monitoring Well Sampling Report prepared by Wright <br /> Environmental for the above referenced site. This letter will also summarize a conference call <br /> which occurred on January 31, 1997 with PHSIEHD staff, John Afonso and John Lynch of Wright <br /> Environmental, and Larry McClean. <br /> The investigation phase of the corrective action at this site is incomplete. In April of 1996, Wright <br /> Environmental conducted an assessment of the downgradient portion of the plume using push <br /> point technology. The purpose of the assessment was to determine downgradient monitoring <br /> well locations. PHSIEHD requires a monitoring well at the downgradient plume boundary to <br /> consider the plume boundary assessment complete <br /> In the PHSIEHD correspondence dated August 12, 1996 you were directed to submit a feasibility <br /> study and corrective action plan pursuant to Article 11 of the California Code of Regulations. The <br /> feasibility study should evaluate natural attenuation and at least one active remedial technology <br /> such as soil vapor extraction with air sparging or overexcavation with air sparging. <br /> PHSIEHD recommends that you submit a workplan describing the installation of a downgradient <br /> monitoring well and a methodology for obtaining data required to evaluate the economic and <br /> technical feasibility of the passive and active remedial approaches you have chosen as applicable <br /> to this site. <br /> Please call Steven Sasson at(209)468-3459 if you need additional information. <br /> Donna Heran, RENS, Director <br /> Environmental Health Division <br /> )JPA <br /> Steven Sasson, Senior REHS Margagorio, RE� <br /> r a <br /> Site Mitigation Unit Supervisor <br /> CC.' Wright Environmental Services, Inc. Christopher Palmer <br /> cc: SWRCB- Mel Jacobo <br /> cc: CVRWQCB- Elizabeth Thayer <br /> A Division of San Joaquin County Health Care Services <br />