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Mr. Sandi De Jong October 10,2006 Page 3 ,-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 recent aerial photo provided by Google Earth. We counted the building clusters within one square mile of the Site,and made the assumption that each building cluster has one septic system. The result of the count indicates approximately 200 building clusters which may each utilize a septic system. In addition to the 200 building clusters,a 19 unit mobile home park exists less than 300 feet east of the site. All these structures are estimated to be utilizing a septic system. The general area consists of a subdivision to the northwest, a mobile park home to the east and agriculture to the northeast and southwest. s'3.6 Expected On-Site Maximum Septic Tank Usage Septic tank use will be from the commercial wine and cheese retail shop and coffee drive-thru.All waste from the cheese making facility will be hauled off site. The waste water will be generated from kitchen food production,kitchen utensil washing,restroom waste water generated by employees, and customer restroom use. In NOA's 2003 report,we recommended installing water flow meters to better calculate septic and non-septic water flow and usage. Mr. De Jong installed three meters on the site. The west meter is used to measure all of the water from the bathroom toilets and hand washing sinks. The middle meter is used to measure all off-site water,which includes all water that is used to mak- e_C n Ts which are carried off site by customers.This meter will not be used in our calculations because none of the water flows into the septic system.The east_me_ter is used to measure all non-restroom use flow,including the washing machine,various sinks in the kitchen and the dishwasher. Table 2. Current Coffee Drive-Thru Meter Information Meter Name Meter Flow Quantity for 790 days Gallons per Dai Bathroom&Wash Sinks 40,890 gallons 51.75 gpd Non Bathroom Use 64,938 gallons 82.2 gpd_ Total Flow 105,828 allons 133.95 gpd The current daily waste water quantity, averaged over a typical work week,is 133.95 gallons per day. This figure is based on the septic and non-septic flow rates from the existing building over a 790 day period of water meter readings.According to Mr. De Jong,he expects to have a 50 percent increase in customer usage along with the increased usage for the wash water in the small cheese making facility. See the following table for the calculations of increased flow.