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Soil Suitability And Nitrate Loading Evaluation Page 3 <br /> Pa-0600569 <br /> 17200 Byron Road (APN # 209-150-23) <br /> ` Tracy, California <br /> r� January 14, 2008 20-1889 <br /> installation of aiwell dseptic syste Information regarding soil suitability and <br /> r1l <br /> nitrate loading ort prop sed scpti stem is included within this report. <br /> 4.0 SEPTIC PERMITS AND PERFORMANCE <br /> Adjacent properties surrounding the subject site are currently in use for agricultural <br /> :exi <br /> n. Asearch of existing septic permits for these adjacent properties resulted in <br /> noti g septic permits on file. Though one site, 17190 West Byron Road, has a <br /> tial structure on site that was built in 1927, which i to the issuance of septic <br /> permits. This site probably has a se tic s stern b no 2gimi 3ugi. Observations of the / <br /> Fil <br /> adjacent property from public vantage( did not Indic se performance of septic <br /> facilities associated with this structure... �. <br /> I 1 5.0 FIELD INVESTIGATIONS <br /> I� The field investigation was conducted on February 26, 2007 and included geologic <br /> 1 reconnaissance and a percolation test boring. The boring was drilled (to maximum depth <br /> of about 3.5 feet using 3.0 inch diameter hand-auger and widened to 6.0finches in <br /> } g <br /> diameter using hand operated post-hole shovel. Groundwater observations were made <br /> during and after completion. <br /> Soils were logged using the Unified Soil Classification including consistency, <br /> color, texture, and gradation, on the bases of excavationtesist ce and observation of r <br /> cuttings. Location of the test boring is shown on attache —"Site Map." The soil <br /> log describing encountered earth materials is included ' Appendi C. All soil borings <br /> were backfilled upon completion. A CTE field engineer ormed the field investigation <br /> and testing. <br /> 6.0 GROUNDWATER <br /> i Groundwater was not encountered with the depth limited depth of o r percolation test <br /> i boring. Water level data in the vicinity (Well # 02SO4 Gated proximately 1 <br /> mile northwest of the site) indicates groundwater to e 5.5 o 16.7 fee below ground <br /> surface as measured between 1959 and 2002. <br /> 7.0 SOIL PROFILE <br /> Published (USDA, Soil Survey of San Joaquin Cunt. , ifornia, dated October 1992) \ \ <br /> mapping indicates soils at the site consist of alluvial soill classified as "Merritt- \ ° <br /> Grangeville-Columbia" and furthermore as "Stomar clay loam. These soils are <br /> described as very deep, well drained, on nearly oil on alluvial fans. Formational <br /> geologic materials shown on the "Geologic Map of the San Francisco-San Jose <br />