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21 <br /> Port of Stockton <br /> General Offices: P.O.209) 946-0246/ FAX 2 8ox 2089, Stockton, CA 9 <br /> 09) 465-7244 or(209) 4665986 <br /> August 26, 1998 <br /> Transmitted Via Facsimile 209-464-0138 <br /> Ms. Carol Oz, REHS <br /> Environmental Health Specialist <br /> San Joaquin County Public Health Services <br /> Environmental Health Division <br /> 304 East Weber Avenue, Third Floor <br /> Stockton, CA 95202 <br /> RE: Analysis of Oxygenates on Soil and Groundwater Samples, Initial Subsurface <br /> investigations for Petroleum Hydrocarbons, Port of Stockton <br /> Dear Ms. Oz: <br /> This letter is a follow-up to your telephone conversation with our environmental <br /> consultant, Mr. Philip Ross of Boyajian & Ross, Inc-, on the oxygenate� TBA was an e 1998, regarding ssential <br /> he <br /> subject analyses. Mr- Ross had called to inquire <br /> analyte for the EPA 8260 scan, as the analyticalBA and gh had <br /> eino s���maple toywere <br /> an cher <br /> having some difficulty with calibrating for le might <br /> laboratory for that particular analyte. The main concern was that sending out the �p San Joaquin County Public <br /> exceed the holding time for the TBA analysis. You indicated SJGPHSIEHD)had seen TBA at several sines <br /> Health Services/Environmental Health Division ( the laboratory called <br /> in the county, and that you would like to see it run. The following day, <br /> Mr. Ross and said that they had resolved their calibration difficulties and that all EPA 8260 <br /> analyses would include TBA. <br /> fact that the EPA 8260 <br /> During your conversation with Mr. Ross, he howedaepositive result or MTBE <br /> being run on those samples that showed <br /> analyses were only g you indicated that you require all samples <br /> utilizing EPA method 8020. At that time, y for oxygenates by EPA 8260. As <br /> associated with potential gasoline impact to analyzed d work plans for the Port of Stockton sites <br /> Mr. Ross noted, Section 3.2 of the approve <br /> far BTEX, TPHg, and MTBE using EPA methods <br /> explicitly stated "Samples will be analyzedle will be <br /> If MTBE is detected in a sample using EPA method 8020, sample <br /> of the <br /> 802018015.... EPA method 8260." You indicated to hire that app fres EPA <br /> run for oxygenates utilizing <br /> work Plans with that statement was an oversight, and that the SJCPHSIEH requires <br /> TON ST., STOCKTON, SAN 30AQUiN COUNTY, CALIFORNIA <br /> GENERAL OFFICE: 2201 W.WASHIN <br /> G <br />