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PUBLIC -HEALTH SERVICES o�,N <br /> SAN JOAQUIN COUNTY <br /> ENVIRONMENTAL HEALTH DIVISION H <br /> Ernest M. Fujimoto, M. D., M.P.H., Acting Health Officer <br /> 304 E. Weber Ave., Third Floor • P. O. Box 388 • Stockton, CA 95201-0388 °4c%F60��P <br /> 209/468-3420 <br /> JERRY MOORE <br /> MOORE PETROLEUM MAILED IMAR 0 81996 <br /> P O BOX 67 <br /> BANTA CA 95340 <br /> RE : Moore Petroleum Sites <br /> 1399 E. Yosemite, Manteca Site Code : 1464 <br /> 14800 Hwy 99, Manteca Site Code : 1600 <br /> 5491 "F" Street, Banta Site Code : 1502 <br /> On February 29, 1996, I met with you and your consultant, Tom <br /> Landwehr, Apex Envirotech, Inc . to discuss the above referenced <br /> sites . This letter is a summary of site conditions and decisions <br /> made during that meeting. <br /> 1399 E. Yosemite, Manteca <br /> The vapor extraction system was operated continuously until <br /> August 4 , 1995, at which time it was placed in a pulse mode and <br /> is operated once a month for a short period of time to determine <br /> if there are any remaining volatiles. Groundwater sample results <br /> have been non detect since July 1995 . It was verbally reported <br /> that the sample results from February 1995, including analysis <br /> for MTBE was non detect . One more sampling event will occur in <br /> May 1995 . A work plan will be submitted to this agency for two <br /> slant soil borings to be drilled below the former tank area and <br /> soil samples to be collected to confirm that the soil has been <br /> remediated. Following these activities a closure report will be <br /> prepared. <br /> 14800 Hwy 99, Manteca <br /> The vapor and groundwater extraction system is still operating. <br /> Groundwater sample results have been non detect since August <br /> 1995, except for EDC. The groundwater samples being collected <br /> from monitoring wells MW1-MW4 are from the groundwater extraction <br /> piping spigots . In order to verify that the sample results are <br /> representative of the groundwater and have not been aerated by <br /> pumping, the remediation system will be turned off one day prior <br /> to the sampling event . Monitoring wells MW1-MW4 will be purged <br /> and sampled directly from the well casing head in the same manner <br /> as all other wells at the site. After the sampling event the <br /> remediation system will be placed back into operation. <br /> The drinking water well at this site was sampled in September <br /> 1994 and EDC was detected at . 6 parts per billion which is above <br /> the California maximum contaminant level (MCL) for drinking <br /> water. In addition monitoring wells MW1-MW4 have evidenced EDC <br /> A Division of San Joaquin County Health Care Services <br />