SITE INFORMATION AND CORRESPONDENCE

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Ms. Jill Jefferson 0 - 2 - 0 • 12 June 2001 restart the system and a requirement to submit a technical report within 30 days that describes how violations of this nature will be prevented in the future. KMEP has not submitted this report. Because the pump and treat system is shut down,the groundwater contaminant plume is not stable and the rise in the groundwater elevation has resulted in the soil vapor extraction and treatment (SVET) system being rendered inoperable. KMEP must establish a protocol to begin the operation of it groundwater extraction and treatment system. We suggest conducting a thorough maintenance event, and then begin operating at a low treatment rate that is increased after effluent analysis shows TBA is below the effluent limit. Use Order No. 5-00-217 as a guide to restart the system. KMEP needs to determine where the TBA and MTBE originate, so we also suggest that KMEP conduct MTBE and TBA analyses on samples collected from its Rl and R2 sample locations in Trapper Sough. This analysis should be conducted at the same time R1 and R2 are measured for other parameters as required by Order No. 5-00-217. Once the groundwater pump and treat system has returned the groundwater elevation to a depth where the SVET can again practically function, then the SVET must operate to its maximum efficiency, and that efficiency measured and reported. It is imperative that this site cleanup progress, so we request that KMEP participate in regular meetings, first to discuss the comments above and other site related issues and then to track progress at the site. Please contact Mary Serra at(916) 255 3082 to arrange for a meeting during July 2001 and quarterly thereafter. If you have any questions, you may contact Mary Serra at (916) 255-3082. W4 L , Q4A, WENDY L. COHEN Chief,Private Sites Cleanup Unit cc: Mr. Carol Oz, San Joaquin County Environmental Health Department, Stockton Mr. Scott Seyfried, Levine-Fricke-Recon,Roseville