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s <br /> k'4 KLEINFELDER <br /> M 1mp&YPP o'V eM nmpanq <br /> File No. 20-1096-15 <br /> j December 4, 1998 <br /> f, <br /> a <br /> i <br /> Mr. Barry Ruhl <br /> A. G. Spanos Laud Company <br /> 1341 West Robinhood <br /> I Stockton, California 95207 <br /> I <br /> Subject: RECOMMENDED PERCOLATION RATES AND <br />'I NITRATE LOADING INFORMATION <br /> CLUBHOUSE DISPOSAL AREA <br /> THE RESERVES AT SPANOS PARK <br /> SAN JOAQUIN COUNTY, CALIFORNIA <br /> Dear Mr. Ruhl: <br /> Presented in this letter are o'ur recommended percolation rates and information regarding nitrate <br /> loading for the clubhouse disposal area at The Reserves project at Spanos Park. As you are <br /> aware, our firm performed four percolation tests in native soils in the corner of the agricultural <br /> field closest to the clubhouse. Attempts were made to locate the percolation tests in areas not <br /> subject to construction equipment or other traffic that would have compacted the underlying <br /> soils. Anticipating a relatively-shallow groundwater depth the percolation tests were excavated <br /> to the depths of approximately 24 inches. The percolation tests were set up on Monday, <br /> November 30, pre-soaked, and the actual tests performed on ,December 1, 1998. After a test <br /> period of four hours, all 'four percolation tests indicated a percolation rate of 60 minutes per inch <br /> with a head maintained at 12 inches. In the same vicinity, a 1.0-foot monitoring well was also <br /> completed on December 2, 1998, 'Por the purposes of measuring groundwater table and obtaining <br /> a groundwater sample for analysis. The depth of groundwater was measured at 5 feet 4 inches <br /> and a water samples was taken and transported to Sequoia Analytical in Sacramento on the same <br /> day. <br /> The analytical test results, which are attached, indicate very low values of nitrate as N of 1.05 <br /> milligrams per liter (ing/1) and nitrate as NO; of 4.66 mg/1. The limits for these constituents are <br /> 10 mg/l for nitrate as N, and 45 mg/l for nitrate as NO3. -- . <br /> 20-1096-15/2018L996 Page I of <br /> Copyright 1998 Kleinfelder. Inc. December 4, 1998 <br /> KLEINEELDER 2825 East Myrtle Street, Stockton,CA 95205-4794 (2091948-1345 (209)948-0621 fax <br />