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L LNovember 21,2006 NOA Project Number: E06044B 3.3 On-Site Septic Repair Permit History / No septic repair permits were found for the Site during file review at EHD on September 16,2006. L3.4 Existing Septic Tank Usage in the Vicinity LIn an attempt to determine the septic system density for the vicinity of the Site, our office reviewed a 2002 aerial photograph of the subject property available from Microsoft Terraserver. We counted the building clusters within one square mile of the Site,and made the assumption that each b Lcluster has one septic system. Using this method,we determined that there are a minimum o 40 septic systems per square mile in the immediate vicinity of the Site. LThe general area consists of agriculture with a few residences. 3.5 Septic Permit History in the Vicinity LThe following septic system permits were found for the vicinity of the Site during file review at / EHD onSeptember 16,2006: L Table 1. Vicinity Septic System Permit Summary. Address,Date Tank Lines, Length, Pits Comments Capacity 14921 South Victory Road 1500 gal Two,75'leach lines New installation to / 11-6-70 Two,14'x 4'x S'seepage pits residence 15499 South Victory Road 1600 gal Four,40'leach lines New installation to 1-25-91 Four,25'x 42" seepage pits residence The septic systems in the area appear to utilize leach lines and pits. 3.6 Septic Repair Permit History in the Vicinity r No septic system repair permits were found for the vicinity of the Site during file review at EHD on / L September 16, 2006. 3.7 Expected On-Site Maximum Septic Tank Usage I Maximum expected usage on each proposed parcel would be for a primary residence and second dwelling unit. Septic system design should be based on the On-Site Wastewater Disposal Standards or other engineering recommendations. lr 3 L "o*4 11 1.