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i <br /> Quarterly Ground--Water Monitoring December 1, 1988 <br /> Beacon. Station No. 1-502, Lodi, California AGS 86091-6 <br /> samples from wells MW-3, MW-4, and MW-5 have decreased since the <br /> last sampling event, with the exception of the benzene in the <br /> sample from well MW-4. The concentrations of total petroleum <br /> hydrocarbons have increased in the samples from wells MW-1 and <br /> MW-2, but have decreased in the samples from wells MW-3 , MW-4, <br /> and MW-5. <br /> Applied GeoSystems recommends continued ground-water monitoring <br /> of this si+'e on a quarterly basis. If hydrocarbon contaminant <br /> concentrations increase. active mitigation may be necessary. <br /> Copies of this report should be forwarded to Ms. Laurie Cotulla <br /> of the San Joaquin County Local Health District, Environmental <br /> Health Division, 1601 Hazelton Avenue, P.O. Box 2009, Stockton, <br /> California 95201 and Mr. Gordon Lee Boggs of the California <br /> Regional Water Quality Control Board, Central Valley Region, 3443 <br /> -� Routier Road, Sacramento California 95827-3098. We have <br /> tentatively aceduled the next sampling event for the week of <br /> December 5, 1988. Please do not hesitate to call if you have any <br /> questions regarding this project. <br /> Sincerely, <br /> .Applied GeoSystems <br /> John Bailey Bobbitt <br /> R.G. 4313 <br /> Gillian S. Holmes <br /> G.E. 2023 <br /> Attachments: Plate P-1, Site Vicinity Map <br /> Plate P-2, Generalized Site Plan <br /> Table 1, Cumulative Results of Subjective Analyses <br /> Table 2, Cumulative ResultS of Laboratory .Analyses <br /> Chain of Custody Records (2) <br /> Analysis Reports (5) <br /> 3 <br /> A,0,0/led 0900SYWOMS <br />