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x <br /> Mr. Saed Sadredin - <br /> January 27, 1992 <br /> Page 2 <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 (TPH) and for benzene, toluene, ethylbenzene, and xylenes <br /> (BTEX). Soil vapors will also be analyzed for tetraethyl lead and chlorinated solvents. A chain- <br /> of-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'l:utter or me at- <br /> (916) 444-9123. <br /> Very truly yours, <br /> BROWN AND CALDWELL CONSULTANTS <br /> Steven 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. Beth Thayer, Regional Water Quality Control Board, Central Valley Region <br /> Mr. Chris Winsor, ARCO Products Company <br /> Mr. Ron Zurlinden,Brown and Caldwell Consultants <br /> i <br /> i <br /> Bmwnland Caldwell <br /> Consultants 666o coxiusrs 66600z.1 <br />