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N�desto. . . . . . . . . . . .(209)527-4050 <br /> i Fresno , . , . . , . . .(209)291-5900 <br /> alffo `ni Sacramento . . . . . . . . . (916)448-5560.iF <br /> San Jose. . . , . . . . . . . .(408)984-7999 <br /> \ I,Water Labs Stockton . . . . . . . . . . . . (209)465-0229 <br /> \ I <br /> August 16, 1988 <br /> Mr. David Carls <br /> San Joaquin Local Health District <br /> 1601 E. Hazelton Avenue <br /> Stockton, CA 95205 <br /> Dear Mr. Carls: TSL HEA�.�N <br /> The following letter is in response to item "2" from �h4�R,&AJ &sed preliminary <br /> site assessment (Report 1425) . <br /> Laboratory methodology for determining low-boiling point hydrocarbons in soil <br /> utilizesla Dani headspace apparatus interfaced with a Varian gas chromatograph. <br /> A photo-ionization detector in series with a flame-ionization detector allows <br /> simultaneous quantitation of both aromatics (BTX's) and low boilers such as <br /> gasoline.' <br /> Gasoline ''consists of numerous aliphatic and aromatic hydrocarbons of various <br /> chain lengths, volatilities, and mobilities. A very small amount .of .heavier <br /> gasolinelcomponents was found in boring #6.. None of the lighter components <br /> was present in this boring. The quantitated value is significantly below the <br /> report limit. <br /> If you have any additional questions, please feel free to contact me. <br /> Sincerely!, <br /> Paul R. Ehrmann <br /> 'l <br /> I <br /> 'f <br /> lw f; <br /> P.O.Box 4249 Modesto.California 95352 <br />