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�., ..i <br /> ` September 10, 2004 <br /> NOA Project Number: E040104A <br /> 3.3 On-Site Septic Repair Permit History <br /> L No septic repair permits were found for the Site during file review at EHD on September 1, <br /> 2004. i5h`jfr� <br /> 3.4 Existing Septic Tank Usage in the Vicinity <br /> In an attempt to determine the septic system density for the vicinity of the Site, our office <br /> reviewed a 1993 aerial photograph of the subject property available from Microsoft <br /> Terraserver. We counted the building clusters within one square mile of the Site, and made <br /> the assumption that each building cluster has one septic system. Using this method, we <br /> determined that there are a minimum of six septic systems per square mile in the immediate <br /> vicinity of the Site. <br /> 3.5 Septic Permit History in the Vicinity <br /> The following septic system permits were found for the vicinity of the Site during file review <br /> at EHD on September 1, 2004: <br /> Table 2. <br /> Vicinity Septic System Permit Summary. <br /> Address,Date Tank Lines,Length,Pits Comments <br /> Capacity <br /> Corner Jack Tone& 1,200 gal Two 20-ft leach lines,three New installation to residence. <br /> Mariposa, 10-5-66 67-ft leach lines <br /> Jack Tone S.of Mariposa 1,200 gal One 90-ft leach line,one 33- New installation to residence. <br /> in diameter by 25-ft deep <br /> seepage pit <br /> Jack Tone bet.Lone Tree& 800 gal One 70-ft leach line New installation to shop. <br /> French Camp, 10-25-74 <br /> 13665 S.Jack Tone, 11-17-89 1,200 gal Two 40-ft leach lines,two New installation to mobile <br /> 33-in diameter by 25-ft deep home. <br /> seepage pits <br /> 13850 Jack Tone, 11-2-99 1,600 gal Three 40-ft leach lines,three New installation to residence. <br /> 2x10x10-ft sumps <br /> V <br /> The majority of the permits reviewed were for new installations. The septic systems in the <br /> area appear to utilize leach lines, leach lines with pits, or leach lines with sumps. <br /> 4 <br />