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{ PUBLI` HEALTH S,-E IMCES Op�u'Nr.0 <br /> SAN JOAQUIN COUNTY <br /> JOG]KHANNA M.D.,M.P.H. g :. <br /> Health Officer <br /> P.O. Bax 2009 • (1601 East Hazelton Avenue) •Stock_Lvx" California 95201 <br /> (209) 468-3400 `r <br /> i� <br /> cc <br /> 3 <br /> PETER D'AMICO <br /> BP OII�THRIFTY OIL <br /> 10000 LAKEWOOD BLVD <br /> DOWNEY CA 90240 MAY 19 1992 <br /> RE: Thrifty Oil Company �! SITE CODE: 1299 <br /> 1250 N. Wilson Way a <br /> 41 Stockton, CA 95205 <br /> San Joaquin County Public Health Services, Environmental Health Division <br /> (PHS/EHD) has reviewed activities to date at thl abo!e referenced facility. <br /> In August 1988 three groundwater monitoring wells were installed at the <br /> site. Soil samples were collected and analyzed. Monitoring well #3 was t <br /> drilled to 50 feet and has been dry since it was installed. Groundwater G <br /> samples were collected from monitoring wells #1� and 1`#2 (drilled to a depth <br /> of 60 feet) on September 1, 1988. Results from soil and groundwater ' <br /> samples indicate that both have been impacted. Since monitoring well #3 <br /> has never had water in it the groundwater gradient for the site has never <br /> been determined. Additional investigation of this site his warranted. <br /> Sampling of the existing monitoring wells is to be initiated immediately. <br /> P g g g �� �' <br /> Additional soil borings and/or monitoring wells should:be installed to <br /> determine the groundwater gradient and physically define the extent of soil <br /> and groundwater contamination. A work plan for installation of the <br /> additional soil borings and/or monitoring wells should be submitted to <br /> PHS/EHD by July 1, 1992. -' <br /> r Pursuant to Section 2652(d) of the Underground Storage Tank Regulations <br /> (California Code of Regulations, Title 23, Subchapter 116) a quarterly <br /> monitoring report shall be submitted to Public Health Services, <br /> Environmental Health Division and Central Valley Regional Water Quality <br /> Control Board (CVRWQCB) until the investigation and cleanup of the site r <br /> is deemed adequate. Your first quarterly report .pan be incorporated into <br />{ your work plan which is to be submitted by July 1, 1992. The report is to <br /> show the: <br /> ii <br /> A Division of San Joaquin County Health('are Serv+Ces I� <br /> i <br />