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r <br /> B R 0 VLA N A N D �, �,�. ; �.E <br /> C A L D W E L- L <br /> June 17, 1998 <br /> Mr. Ronald Rowe <br /> San Joaquin County Public Health Services <br /> Environmental Health Division <br /> 304 Webster Avenue <br /> Y. y <br /> Post Office Box 388 <br /> Stockton, California 95201-0388 K.� t 017-6271-0111 <br /> Subject: -Clarification of Drilling and-Samplifig- M_ eth-0ds T&T eking, <br /> Lodi', California <br /> ¢ <br /> Dear Mr. Rowe: j <br /> Pursuant to our telephone conversations of June 12, 15, 'and,17, 1998, this letter clarifies the <br /> change in soil sampling protocol that will lie used during field work at the subject,site. <br /> 4: <br /> Based on the proximity of the planned;boreholes to the former UST excavation, and <br /> evaluation -of. the previous investigation, we 'do not expect to encounter petroleum <br /> hydrocarbons above"the water table. We.will use continuous core for lithology as outlined in <br /> our March 4, 1998'1 workplan. If we encounter any indication of petroleum hydrocarbons j <br /> (PID, observation, odor) where the collection of a soil sample would be prudent, a second, j <br /> adjacent borehole will be drilled for the purpose of collecting soil samples in the appropriate <br /> intervals. Soil samples will be collected using the protocol outlined in our workplan. <br /> If you have any questions, please contact me at (9.16) 444-0123. <br /> Sincerely, <br /> BROWN AND CALDWELL <br /> yF <br /> Tina M. Bauer <br /> Project Manager <br /> TMB:jw <br /> 4. 1 <br /> Cc: Mr. Terry Tarditi, T&T Trucking � � r' ' ` ° <br /> !3 ' ! I - - <br /> BCSACO]16 0 0 016 2 7]ICORRESP.\TR-4.DCICqvironmental EngineeringAAnd Consu!ting•Analytical Services <br /> 9616 MICRON AVENUE. SUITE-6 00, SACRAMENTO, CA 95827-2627 <br /> (9 16) 444-0123 FAX {916) 856-5277 <br />