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January 4,2006 <br /> NOA Project Number: E05166B <br /> /3.2 On-Site Septic Permit History <br /> One septic permit was found for the Site during file review at EHD on December 20,2005. <br /> Table 1. <br /> Site Septic System Permit Summary. <br /> Address,Date Tank Lines,Length,Pits Comments <br /> Capacity <br /> 17510 Tretheway Road 1200 gal One 40'leach line New installation to <br /> 8-10-78 One 25'by 33" seepage pit residence <br /> /3.3 On-Site Septic Repair Permit History <br /> No septic repair permits were found during file review at EHD on December 20, 2005. <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 reviewed <br /> ` a recent aerial photograph available from Googlemaps.com. We counted the building clusters within <br /> one square mile of the Site,and made the assumption that each building cluster has one septic <br /> system. Using this method,we determined that there are a minimum of 30 septic systems per square <br /> mile in the immediate vicinity of the Site. <br /> The general area consists of agriculture with a few scattered residences. <br /> 3.5 Septic Permit History in the Vicinity <br /> The following septic system permit was found for the vicinity of the Site during file review at EHD <br /> on December 20, 2005: <br /> Table 2. <br /> Vicinity Septic System Permit Summary. <br /> Address,Date Tank Lines,Length,Pits Comments <br /> Capacity <br /> 17450 North Tretheway 800 gal One 100'leach line New installation to a <br /> 6-18-71 residence <br /> 17451 North Tretheway Two 1200 Two 100'leach lines New installation to a <br /> 3-3-71 gal Two 25'x 33" seepage pits residence <br /> 17551 North Tretheway Two 100'leach lines New installation to a <br /> 5-24-71 1600 gal Two 25'x 33"seepage pits residence <br /> 17781 North Tretheway Three 40'leach lines New installation to a <br /> 11-5-74 1600 gal Three 25'112"42" see a e pits residence <br /> 3 "'44 <br />