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PUBLIC rfEALTH SERVrCES <br /> SAN JOAQUIN COUNTY =' <br /> t0' j <br /> ENVIRONMENTAL HEALTH DIVISION <br /> Ernest M. Fujimoto, M.D., M.P.H., Acting Health Officer .. P <br /> 445 N. San Joaquin Street • P.O. Box 388 • Stockton, CA 95201-0388 <br /> (209) 468-3424 <br /> TREVOR SANTOCHI <br /> CRC ENVIRONMENTAL <br /> 17875 VON KARMAN SUITE 200C, � 9 <br /> IRVINE CA 92714 <br /> RE: Bridges Specialty Center SITE CODE: 505361 <br /> 2233 Grand Canal Boulevard <br /> Irvine CA <br /> San Joaquin County Environmental Health Division(PHS/EHD) has reviewed the Workplan For <br /> Groundwater Investigation submitted with the addendum to the May 11, 1994 workplan dated <br /> September 22, 1994 by CRC Environmental Risk Management, Inc. for the above referenced <br /> site. <br /> The workplan states that the annular space above the bentonite seal will be filled with cement <br /> grout. PHS/EHD requires the grout used to fill the annular space in a monitoring well above the <br /> bentonite seal to be equivalent to a 9 sack cement slurry placed from the bottom up by the tremie <br /> method. <br /> The section of the workplan discussing analytical methods for groundwater analysis states that <br /> the water samples will be analyzed for Total Petroleum Hydrocarbons as Gasoline. The history <br /> of this site suggests that the hydrocarbon present in the elevator piston area is hydraulic fluid. <br /> PHS/EHD recommends analysis of water samples from the monitoring wells by EPA method <br /> 5520 for total oil and grease to detect the presence of any hydraulic fluid in the groundwater <br /> beneath the site. <br /> PHS/EHD issued permit #4347 on October 4, 1994 to Clearhart Construction and Drilling for <br /> the installation of three monitoring wells at the above referenced site. <br /> For further information please contact Steven Sasson at (209) 468-3459. <br /> Donna Heran, REHS, Director <br /> Environmental Health Division <br /> :11�en S o e'l Z I Diane WMHinson, REHS <br /> Site Mitigation Unit Supervisor <br /> A I)i+ision of San Joauuin Conniv Health Care Scrvice� <br />