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714 440 7700 CRC ENVIRONMENTAL RISK WNAGEMENT, INC. <br /> W <br /> 476$211 FAX <br /> 17875 VON KARMAN I � IRrNMEN;TAL HE-Al-Th <br /> SUITE 200 Fr evT SI RV ICE <br /> IRVINE,CALIFORNIA <br /> 92714 <br /> 4 NOV 17 PQM 2. 35 <br /> November 8, 1994 <br /> Stephen Sasson, Senior REHS <br /> Site Mitigation Unit <br /> 445 North San Joaquin Street <br /> Stockton, California 9520,1-0388 <br /> Re: Bridges Specialty Center <br /> Review Letter Site Groundwater Investigation <br /> 2233 Grand Canal Boulevard,'Stockton, California <br /> Dear Mr. Sasson: <br /> i <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 /> Y <br /> CRC ENVIRONMENTAL RISK NT, INC. <br /> Y <br /> — <br /> �TREVOR Q.SANTO H) <br /> or D. Santochi, CEG #15 1 No. 1581 <br /> Technical Director CLT'�'E° <br /> ENG! EEG{'JG <br /> + Exp" <br /> cc: Diane Hinson, REHS Su ``�rvtsor,,%', <br /> Ron Allums, CRC <br /> Farshad Razmdjoo, Environ <br /> George Bravante <br /> Attachments, 3 pages <br /> s;lsptltrevorlgwtrsamp.bri <br /> I <br />