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n_ March 28,2007 NOA Project Number: E06122A 3.2 On-Site Septic Permit History No septic permits were found for the site during a record search at the EHD on February 15,2007. No septic systems exist on site. 3.3 On-Site Septic Repair Permit History F1 Please see section 3.2 for septic permit history. '� 3 F, 3.4 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 Google Maps TM. We counted the building clusters within one square mile of the Site, and made the assumption that each building kcluster has one septic system. Using this method,we determined that there are a minimum of 100 f � septic systems per square mile in the immediate vicinity of the Site. The general use of the vicinity is split between industrial and surrounding agricultural land with associated residences and farm structures. _t 3.5 Septic Permit History in the Vicinity After a file review at the EHD on February 15, 2007 it was determined that septic systems in the area appear to utilize leach lines with seepage pits. j 3.6 Septic Repair Permit History in the Vicinity After a file review at the EHD on February 15, 2007 it was determined that septic system repairs in the area appear to have been primarily for the addition of leach lines and a seepage pits. 3.7 . Expected On-Site Maximum Septic Tank Usage 1 Maximum expected usage on each proposed parcel would be for the three warehouse buildings. The warehouses will be occupied by administrative and professional services,retail sales,manufacturing, F+ warehouse distribution and construction services. A total of 130 parking spaces are available, and an average daily flow of approximately 1,186 gallons per day is estimated in the Nitrate Loading Study E (see Part 1I). The septic system design flow,which incorporates peak factors,is estimated to be 2,107.5 gpd. This is based on the number of available parking spaces, proposed uses and information provided by Mike Smith Engineering,Lodi. The following table presents a breakdown of these uses: 3 F "040 R 1 I`-