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TERRA GENESIS <br /> A California Corporation <br /> 1014 Sixteenth Street • Post Office Box 3047 • Modesto, California 95353 <br /> Telephone (209) 521-6260 • Telecopier (209) 521-5971 <br /> EPA Identification Number - CAD982040198 <br /> July 11, 1988 <br /> ENVIROMENTAL HEALTH <br /> Dennis Cote FERMIT/SERVICES <br /> San Joaquin County <br /> Department of Public Works <br /> 1810 E. Hazelton Ave. <br /> Stockton, CA 95205 <br /> Subject: PERCOLATION TESTS AND DRAINAGE CALCULATIONS FOR TERRA GENESIS, <br /> INC. SITE NEAR MANTECA, CALIFORNIA. <br /> Dear Mr. Cote: <br /> This letter is to inform you of the results of percolation tests at <br /> the proposed Terra Genesis, Inc. site located near Manteca, California. <br /> Three (3) percolation tests were conducted during the period of July <br /> 7-8, 1988. The tests were run as per San Joaquin County Public Works <br /> standard procedures. The holes were located in different areas <br /> surrounding the existing soil treatment pad. The slowest percolation <br /> rate recorded was 2.0 inches/hour. This hole was located on the west <br /> side of the access road that leads to the treatment pad. The other <br /> two (2) test hole rates were 2.5 inches/hour and 8 inches/hour. <br /> I have also enclosed a revised copy of the drainage calculations per <br /> San Joaquin County drainage criteria and a revised site plan that reflects <br /> the county's comments at the meeting held on July 5, 1988. <br /> If you have any questions, please call me or Doug Ries at (916) 920-3518. <br /> Sincerely, <br /> L.A. Moldenhauer <br /> Vice President of Engineering <br /> LAM:ddr <br /> Enclosure <br /> cc: San Joaquin Local Health District <br /> San Joaquin County Planning Department <br /> San Joaquin County Air Quality Control District <br /> Providing services in transportation, disposal and treatment of hazardous waste materials. <br />