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PUBLIC HEALTH SERVICES <br /> ,o�a��M...� <br /> FFG •.pG <br /> SAN JOAQUIN COUNTY <br /> JOGI KHANNA RD,M.P.H. <br /> Health Officer <br /> P.O. Box 2009 • (1601 East Hazelton Avenue) •Stockton, California 95201 04�! 6-*.a <br /> (209) 468-3400 <br /> LES CALKINS <br /> P O BOX 19825 ��� DE ��9[ <br /> ACAMPO, CA 95220 <br /> RE: Les Calkins Trucking SITE CODE: 1633 <br /> 19501 N. Hwy 99 <br /> Acampo, CA <br /> On November 9, 1992 a meeting was held in the conference room of the San Joaquin <br /> County Board of Supervisors to discuss the above referenced underground storage <br /> tank (UST) site. <br /> In attendance were: <br /> Edward Simas - Supervisor, San Joaquin County <br /> George Barber - Supervisor, San Joaquin County <br /> Mike McGrew -- Chief County Counsel, San Joaquin County <br /> Ronald Valinoti - Director,San Joaquin County Public Health Services, <br /> Environmental Health Division (PHS/EHD) <br /> Margaret Lagorio - Senior REHS, PHS/EHD <br /> Les Calkins - Property Owner <br /> Tim Smith - T & T Earth Services <br /> Tom Hunt - T & T Earth Services <br /> Gary Gibson - Chemical Specialties International <br /> The purpose of this letter is to clarify the site history and summarize <br /> information and concerns that were discussed at the meeting. , <br /> The UST site history is summarized as follows: <br /> On December 20, 1991, three underground storage tanks were removed at this <br /> site. The PHS/EHD staff inspection report noted that the tanks were in poor <br /> condition; that there was water in the excavation and a water sample was <br /> taken, and that the stockpiled soil was sampled. <br /> In February 1992, PHS/EHD staff learned that "Superbugs" were being used in <br /> the excavation which had been completely filled with water. <br /> On March 3, 1992, PHS/EHD received results of the soil and water sampling <br /> which had occurred during the tank removal on December 20, 1991. The <br /> analytical results indicated contamination in all the soil and water samples. <br /> Consequently, you were instructed to cease the "Superbug" remediation <br /> activities due to the fact that the remedial action being attempted might <br /> cause vertical migration of the hydrocarbon contamination. In addition, you <br /> were informed that PHS/EHD must review and approve underground storage tank <br /> cleanup actions prior to implementation. <br /> On May 27, 1992, the site was placed in the San Joaquin County "Local <br /> Oversight Program" (LOP) when a work plan for further site investigation was <br /> submitted. In July 1992, four soil borings were drilled in the area of the <br /> tank excavation to investigate the extent of contamination. The borings were <br /> drilled to 35 feet below grade to verify that contamination was not present <br /> at the level where highest groundwater had existed (based on 1986 San Joaquin <br /> County Flood Control District groundwater maps) . <br /> A Division of San Joaquin County Hc2ih rare Scrvicea �� <br />