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0- August 29, 2006 NOA Project Number: E06084A # , 3.2 On-Site Septic Permit History F1No septic permits were found for the Site during file review at EHD on July 31, 2006. 3.3 On-Site Septic Repair Permit History f ! No septic repair permits were found for the Site during file review at EHD on July 31, 2006. F3.4 Existing Septic Tank Usage in the Vicinity In an attempt to determine the septic system density for the vicinity of the Site, our office reviewed a 1993 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 building cluster has one septic system. Using this method,we determined that there are a minimum of 20 septic system per square mile in the immediate vicinity of the Site. -- The general use of the vicinity is farmland with a few scattered residences. - P3.5 Septic Permit History in the Vicinity The following septic system permits were found for the vicinity of the Site during file review at I + EHD on July 31, 2006: Table 1. Vicinity Septic System Permit Summary. Address,Date Tank Lines,Length,Pits Comments Capacity 2325 West Durham Ferry Road 1200 gal Two,100'leach lines New installation to 6-27-97 residence 2365 West Durham Ferry Road 1200 gal Two,90'leach lines New installation 3-10-76 3320 Durham Ferry Road 1600 gal Two,70'leach lines New installation 6-29-92 Two,4'x 12'x 10' seepage pits L # 3300 West Durham Ferry Road 1200 gal Three,90'leach lines New installation 5-3-76 The septic systems in the area appear to utilize leach lines and some seepage pits. 3.6 Septic Repair Permit History in the Vicinity The following septic system repair permits were found for the vicinity of the Site during file review at EHD on July 31,2006: 3