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i <br /> 714"0 7700 CRC ENVIRONMENTAL RISK MANAGEMENT, INC <br /> 71.1.476 8211 FAX <br /> 17M75 VON KARMAN <br /> SUITE 200 <br /> IRVINE CALIFORNIA <br /> ]27,❑ <br /> November 8, 1994 <br /> Stephen Sasson, Senior REHS <br /> Site Mitigation Unit <br /> 445 North San Joaquin Street <br /> Stockton, California 95201-0388 <br /> Re Bridges Specialty Center <br /> Review Letter Site Groundwater Investigation <br /> 2233 Grand Canal Boulevard, Stockton, California <br /> Dear Mr Sasson <br /> The Work Plan submitted by CRC Environmental Risk Management, Inc (CRC) stated in the <br /> groundwater section "that water samples should be analyzed for petroleum hydrocarbons as <br /> gasoline" This was in error. The groundwater will be analyzed for Total Petroleum Hydrocarbons <br /> (TPHs) as hydraulic fluid. A sample of the hydraulic fluid within the elevator shaft pit area was <br /> taken and has been used as a standard for the analysis. The Modified 8015 Method as hydraulic <br /> fluid covers a wide hydrocarbon spectrum C-10 to C-50 range The analysis is being run at the <br /> Curtis &Tompkins laboratory in Berkeley Attached are three chromatograms on one page showing <br /> two soil sample runs and the collected hydraulic fluid sample for comparison Additionally, a <br /> rentention time standard showing a range from C-10 to C-50 and the collected hydraulic fluid <br /> sample standard at the same scale for comparison is also included <br /> CRC has used Modified Method 8015 as hydraulic fluid on all previous groundwater samples and <br /> recent samples taken within the elevator shaft area, and would like to continue to use this method. <br /> Should you have any questions or if I can be of any help, please feel free to contact me at (714) <br /> 440-'7700 <br /> Yours truly, <br /> CRC ENVIRONMENTAL RISK F , INC. <br /> C` <br /> TREVOR Q 5Ai4TQCHl <br /> or D Santochi, CEG ##15 1 Ko 2531 <br /> Technical Director ` c^.TIC;C0 <br /> F 49Z <br /> cc, Diane Hinson, REHS Suervtsor F <br /> Ron Allums, CRC <br /> Farshad Razmdjoo, Environ <br /> George Bravante <br /> Attachments, 3 pages <br /> s lsptlt=vor4"raamp bn <br /> I <br /> I <br />