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APACHE PLASTICS, L. P. �^ ff SS 2050 E . Fremont St. • P.O. Box 5127 • Stockton 'CA 45205014754091466-4356 • 8001527-2243 • FAX 2091466-1730 November 4, 1993 Mrs. Diane Hinson Public Health Services 1601 East Hazleton Avenue Stockton, CA 95201 Subject : Quarterly Monitoring Report Dear Mrs. Hinson: The following events possibly of interest to the Public Health Services have occurred since my previous monitoring report to you dated June 14, 1993 : • July 8, 1993 - All monitoring wells were sounded and all still essentially dry. August 18, 1993 - All monitoring wells were sounded and all still essentially dry. • September 22, 1993 - Authority to Construct permit Number N-38-21 -2 was issued by SJVUAPCD to construct a soil vapor extraction system served by a Ford industrial engine (i. e. the VR Systems model V3) . • October 14, 1993 - Requested change in testing requirements specified on permit N- 38-21 -2 . • October 20, 1993 - The change in testing requirements mentioned above was granted. We are finally ready to do some serious vapor extraction remediation with the VR Systems internal combustion engine. We will begin as soon as possible with the large machine powered by a 460 C .I.D . Ford industrial engine capable of hydrocarbon destruction at a rate of fifty-five pounds per hour. All the experts I have questioned believe that six months with the big system will be appropriate. At that point the big system will be consuming an inappropriately large quantity of supplemental natural gas. We will then replace the large system with a V2C system having a displacement of 110 C .I.D capable of hydrocarbon destruction at a rate of fifteen pounds per hour. This smaller system will be available for as much time as is necessary to complete the job .