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Denver Associates <br /> Page 2 copy <br /> 5. A description of local topography, geology, and estimated or <br /> measured depth to ground water shall be provided along with <br /> documentation of reference source. <br /> 6. Provide proposed disposition regarding the contaminated <br /> excavated soil currently on site. Explain whether <br /> transportation off site or aeration on site will take place. <br /> Aeration activities are approved and supervised by the San <br /> Joaquin Local Air Pollution Control District. Contact <br /> SJLAPCD for specific requirements. <br /> Due to the proximity of groundwater, a groundwater investigation <br /> may be necessary regardless of the outcome of this soil <br /> evaluation. Enclosed is an informational packet outlining the <br /> steps to obtain the necessary permits to facilitate the <br /> groundwater investigation. Tri—Regional Guidelines for Initial <br /> Evaluation and Investigation of Underground Storage Tanks shall <br /> be followed, as well as guidance presented in the LUFT Manual. <br /> The above items should be addressed in a revised sampling plan <br /> which must be submitted to this office for approval prior to <br /> initiating the workplan. <br /> Please contact Cynthia Wagner of my staff at (209) 468-3420, if <br /> you have any questions. <br /> Jogi Khanna, M. D. , M. P. H <br /> District Health Officer <br /> !�/e. L <br /> Ron Valinoti, R. E. H. S. , Director <br /> Environmental Health Division <br /> Enclosures <br /> RV/CW: ma <br /> cc DE Rollo Mazda, Bill Hughes w/enc. <br /> RWOCB, Region 5; w/o enc. <br /> Thorne Environmental ; with enc. <br /> North Cal Environmental with enc. <br />