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February 2,2006 <br /> NOA Project Number: E05058B <br /> 3.0 EXISTING AND PROPOSED SEPTIC TANK USAGE <br /> 3.1 Existing On-Site Septic Tank Usage <br /> V� <br /> No structures or evidence of a septic system were observed on the subject property. The EHD <br /> septic permits were searched on January 23, 2006;no permits were found for the address of 2777 or `� c¢� <br /> 2625 West Linne Road. <br /> 3.2 On-Site Septic Permit History / <br /> �p <br /> No septic permits were found during file review at EHD on January 23, 2006 for the address of <br /> 2777 &2625 West Linne Road in Tracy,California. <br /> 3.3 On-Site Septic Repair Permit History <br /> No septic repair permits were found for the Site during file review at EHD on January 23,2006. f <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 1993 aerial photograph of the subject property available from Microsoft Terraserver. We counted <br /> the building clusters within one square mile of the Site, and made the assumption that each building <br /> cluster has one septic system. Using this method,we determined that there are a minimum ofJ 15 <br /> septic system per square mile in the immediate vicinity of the Site. <br /> The general use of the vicinity is farmland.There are some residences in the area. <br /> 3.5 Septic Permit History in the Vicinity <br /> The following septic permit was found for the vicinity during file review at the EHD on January 23, / <br /> 2006: <br /> Table 1. <br /> Vicinity Septic System Permit Summary. <br /> Address,Date Tank Lines,Length,Pits Comments <br /> Capacity <br /> 3031 Linne Road 2000 gal Four,100'leach lines New installation to <br /> 2-13-90 residence <br /> 2986 West Linne Road 1200 gal Three,80'leach lines New installation to <br /> 4-12-1968 residence <br /> 3 '004 <br />