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z <br /> 419 Main St.,Manteca <br /> Boyett Petroleum <br /> Page 2 <br /> Furthermore,since Method 8020 is not capable of detecting oxygenates other than MTBE, <br /> Method 8260 is the only choice available for oxygenate analyses. Given the history of the <br /> site where concentrations as high as 11,600 micrograms per liter(ug/o of MTBE, 1,130 ug/l <br /> of TBA,and 58 ug/of TANTE have been detected in the monitoring well samples,the use <br /> of Method 8260 for oxygenate analyses must be included in all future quarterly and <br /> investigative sampling. PHS/EM also requires the analyses of 1,2-dichloroethane (1,2- <br /> DCA) and 1,2-dibromoethane (EDB). It should be noted that the aromatic hydrocarbons as <br /> benzene,toluene,ethyl-benzene,and total xylenes <br /> detected der Methofive oxygenates <br /> 8260B Therefore <br /> l as <br /> ethanol,methanol, 1,2-DCA, and EDB can <br /> the additional cost of running these extra chemicals should be minimal if any. It should also <br /> be noted that some laboratories have the capabilityto detect hydrocarbons petroleum as <br /> gasoline (I'PH g) using Method 8260B. <br /> In a telephone conversation on November 21,2000,Mr.Fox expressed that you had given <br /> him consent to perform the proposed work as soon as possible without going through the <br /> bidding process or obtaining prior approval of cost from the State Clean Up Fund (Fund). <br /> PHS/EHD recommends seeking cost pre-approval from Fund before the commencement <br /> of work; however,it is your decision and responsibility to obtain the cost pre-approval. The <br /> proposed monitoring well work must commence by December 25,2000 and the CPT <br /> work by December 31,2000. <br /> If you have any questions,please contact Jeffrey Wong at (209) 468-0335. <br /> Donna Reran,RENS,Director <br /> Environmental Health Division <br /> effre Wong, RENS �/ Dot Lofs om <br /> J y Registered Geologist,Unit IV <br /> LOP/Site Mitigation Unit IV g g <br /> C: RWQCB, Central Valley Region- Marty Hartzell <br /> C(fax): VA-IF,Inc.- Bill Fox <br /> I <br /> 1 <br />