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STATE OF CALIFORNIA _ _ GEORGE DEUKMEJIAN.Governor *CALIFORNIA REGIONAL WAice., QUALITY CONTROL BOARD-- `W ;ice`` CENTRAL VALLEY REGION r 3443 ROUTIER ROAD ,��r SACRAMENTO,CA 95827-3098 �::' 19 Octobar 1987 Mr. Mike Eogetti Tracy Orchard, Inc. P.O. Box 705 Vernalis, CA 95385 GASOLINE SPILL AT THE TRACY ORCHARD SANITARY SEWER PROJECT, TRACY, SAN JOAQUIN As you discussed by phone on 5 October 1987 with staff, we have recently been informed that cleanup at the subject site is not proceeding as promised during our 6 July 1987 meeting. You will recall that the Board holds your company, as the developer of the site, responsible for the contamination that has occurred at the site. At our 6 July 1987 meeting, your contractor at the time, Pacific Asphalt, agreed to take on the cleanup of the contaminated ground water. A report detailing cleanup methods to be used was to be submitted for approval by the Board before cleanup began. Recent inquiries as to the status of the report/cleanup revealed that your company and Pacific Ashalt have had a falling out and no progress is being made on the cleanup. The Board was never informed of this through correspondence as we should have been. A recent sample taken from Dewatering Well No. 1 confirms the ground water is contaminated. Benzene was detected at 510 ug/l and Toluene at 903 ug/l . The state action levels for these constitiuents are 0.7 ug/l and 100 ug/l , respec- tively. Two nearby domestic wells were sampled and fortunately still show nondetectable levels of gasoline related compounds. The ground water contaminated from the t7L; 1987 spill must be cleaned up regardless of your future construction plans. You are required to submit a Technical Report, including a cleanup plan prepared by a California Registered Civil Eng'ineer, by 9 November 1987. This Report must contain details of a proposed extraction and treatment system and sample results of the three monitoring wells and the dewatering wells. If contamination is detected in any of the three monitoring wells, further plume definition will be required before design and installation of an extraction system is approved. Due to the time schedule required for the submittal of this report, you should collect ground water samples as soon as possible.