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,,.. Mr.Jadi Singh <br /> January 24,2003 <br /> ,lob Number: LE02 481 <br /> Page 9 <br /> 5.2 Double Rini Infiltrometer Tests <br /> �. A total of two, 4-hour double ring infiltration tests were performed on November 23 and 25, <br /> 2002 to determine the infiltration rate of the soil at a depth of 0.25 feet and 1.9 feet. A double <br /> ,r ring infiltrometer test is described by ASTM D 3385-94 standard for measuring the infiltration <br /> rate of soil. The ASTM D 3385-94 standard is attached in the appendix. The rings were driven <br /> in the soil with a sledge hammer and driving plate to approximately 4 inches below the exposed <br /> ;,. soil surface. The soil was supersaturated prior to performing each test. <br /> The double ring infiltrometer tests were configured with a reservoir and float system to maintain <br /> W. a constant head in each ring approximately 1 inch above the soil. A spike(a large nail)was <br /> placed in the soil inside each ring at the same elevation for reference. The level of the water in <br /> each ring was set equal in each ring and each ring was sealed from the other. Over a regular <br /> interval, the rate of fluid flow was noted as inches drop in the reservoir. Since the surface area is <br /> known for each ring, the resulting incremental infiltration rate was calculated and was plotted on <br /> semi-log paper( see the appendix for the graph of data). The infiltration for the inside ring is <br /> normally reported for the measurement since the most important purpose of the outside ring is to <br /> promote vertical flow of the inside ring. The following table is a summary of the infiltration rate <br /> of the shallow soil. <br /> Table 4. <br /> +- Summary of double ring infiltrometer tests. <br /> Test No., Duration Percolation Percolation Rate Soil Type,comment <br /> �.. Date Tested of test Test Depth(ft) (minutes/inch) <br /> DR-1, 4 hour 1.90 51.9 min/inch Lt.brn silty f-m sand,loose(SW), <br /> 11/25/02 moderate percolation rate. <br /> DR-2, 4 hours 0.25 52.9 min/inch Dk bm silty f-m sand,loose(SW), <br /> 11./23/02 1 moderate percolation rate. <br /> .. The result of the infiltration tests indicated the infiltration rate of the surface layer is about 52 to <br /> 53 minutes per inch for depths between 0.25 and 1.9 feet. <br /> 6.0 ESTIMATED WASTE WATER FLOW <br /> w. The average daily flow and peak flow of sewage for the proposed facility is unknown. Estimates <br /> of flow have been made from one of two similar facilities owned by Jadi Singh. An ARCO <br /> AM/PM facility, located at 15051 Rogers Road,Patterson, California is the most similar facility <br /> ti.. <br /> r vE�s y <br /> it s <br /> � W <br /> d A <br /> K'TSpG\ <br /> r <br />