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Color Spot <br />April 13, 1989 <br />Page 2 <br />B. Obtain one water sample from each of the three wells <br />identified on workplan and analyze for TEPH and BTX&E. For <br />drinking water services, EPA recommends that the 500 series <br />for volatile organics be used in preference to the 600 <br />series because the defection limits are lower and the QA/QC <br />is better. <br />9. Enclosed is an informational packet outlining the steps to <br />obtain the necessary permits to facilitate the soil vapor <br />investigation. <br />These issues should be address in a revised workplan which must <br />be submitted to this office for approval prior to initiating the <br />workplan. <br />Should you have any questions concerning this matter, please <br />contact Cynthia Wagner of My staff at (209) 468-3420. <br />Jogi Khanna, M.D., M.P.H. <br />District H -e- llthh Officer <br />Ro alv� w <br />noti, Director <br />Environmental Health Division <br />RV/CW:ma <br />Enclosure <br />cc: Stall, Gardner, & Dunne, Inc. w/Enclosure <br />CC Region 5, RWQCB w/o Enclosure <br />