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Mr Saed Sadredin <br /> January 27 1992 <br /> Page 2 <br /> • <br /> Sampling Plan <br /> Vapor samples will be collected in tedlar bags from a sample tap located at the outlet of the <br /> vacuum pump. The vapor samples will be analyzed by an EPA-certified analytical laboratory <br /> for total petroleum hydrocarbons (MH) and for benzene, toluene, ethylbenzene, and xylenes <br /> (BT X') Soil vapors will also be analyzed for tetraethyl lead and chlorinated solvents A chain- <br /> of-custody <br /> hain- <br /> o£custody form will be used to record possession of the sample from time of collection to its <br /> arrival at the laboratory Flow rate data will also be collected during the test The air flow rate <br /> will be measured with a pitot tube magnahelic type flow meter <br /> If you have any questions regarding the pilot test plan, please call Ms Karen Lutter or me at <br /> (916) 444-0123 <br /> Very truly yours, <br /> BROWN AND CALDWELL CONSULTANTS <br /> SSteven D Misner . <br /> Project Manager <br /> SDM LA.jrb <br /> cc: Mr. Chuck Carmel, ARCO Products Company <br /> Ms. Mary Meays, San Joaquin County <br /> Ms. Bette Thayer, Regional Water Quality Control Board, Central Valley Region <br /> Mr. Chris Winsor, ARCO Products Company <br /> Mr. Ron Zurhnden, Brown and Caldwell Consultants <br /> Brown and Caldwell <br /> Consuitants 6660vC0EUtESPZ666W2 1 <br />