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R.W. SIEGFRIED & ASSOCIATES <br /> CONSULTING CIVIL ENGINEERS <br /> ROBERT W.SIEGFRIED SUBDIVISIONS <br /> JAMES F.YOST MUNICIPAL <br /> WAYNE M.WEST IMPROVEMENTS <br /> ROBERT G.CELUM STRUCTURES <br /> LEX A.CORRALES BUILDING DESIGN <br /> LYNN M.SUTTON SURVEYS <br /> STEPHEN R.THUMLERT September 30, 1991 RE Y TO: <br /> ALAN E.LINDE <br /> STOCKTON <br /> i TRACY <br /> San Joaquin County <br /> Public Health Services SEP 3 0 1991 <br /> Post Office Box 2009 <br /> Stockton, California 95201 <br /> LfJVIRONMENTAL HEALTH <br /> Attention: Mr. Jim Miller PERMIT!SERVICES <br /> Gentlemen: <br /> Subject: Minor Subdivision Application No. MS-91-102 <br /> Soil Suitability Study <br /> The property covered by the subject Application comprises <br /> approximately twenty-two (22) acres at 11266 Micke Grove Road. The <br /> site is located within the East i of Section 36 , Township 3 North, <br /> Range 6 East, Mount Diablo Base and Meridian. <br /> This property and the surrounding area is zoned AL-10 (Agri- <br /> cultural Limited) . The topography of this location is very flat <br /> with a gradient of approximately 0 . 0011, sloping northeast to <br /> southwest. There are no waterways or drainage channels crossing <br /> the property. <br /> The topographic soils map prepared by the University of Cali- <br /> fornia, Berkeley, indicates the site is largely covered by Capay <br /> clay loam with smaller areas being covered by Landlow clay (adobe) <br /> soils. For several years, the subject property has been used for <br /> the cultivation of row crops. Prior to that time, the land was <br /> planted to walnuts. The latest San Joaquin County Water <br /> Conservation District maps reveal the standing water level of the <br /> subject site to be at a depth of approximately sixty-six (661 ) feet <br /> below the ground surface. This relates to a groundwater elevation <br /> of approximately -29 feet. <br /> Attached is a copy of a percolation test performed on <br /> September 25, 1991 by Kleinfelder, Inc. Two (2) test holes were <br /> drilled to a depth of approximately nine and one-half (9Z ' ) feet. <br /> The observed percolation rates are 20 and 5 minutes per inch for <br /> test holes P-1 and P-2 , respectively. <br /> (Cont'd. ) <br /> C:IcUV_77041.S0 <br /> MAIN OFFICE 4045 CORONADO AVENUE STOCKTON,CALIFORNIA 95204-2396 Telephone(209)943-2021 FAX Telephone(209)942-0214 <br /> TRACY BRANCH OFFICE 3120 TRACY BOULEVARD,SUITE D TRACY,CALIFORNIA 95376-1719 Telephone(209)835-5300 <br />