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s July 6, 2004 NOA Project Number: E04017A Page 6 According to Crites and Tchobanoglous (1998), the size of the-grease trap interceptor is normally 1 to 3 times the average daily flow of kitchen waste water. .There is no available information regarding flow from the kitchen to the existing grease trap at SG&CC. Given these factors, we believe that the grease trap size should be sized to the largest available local tank available which is 2,000 gallons. First Floor Pumping Station Tank: A 750 gallon Jensen precast commercial septic tank(LM750) was selected as a suitable first floor pumping station. The tank is a single compartment design. The Jensen tank should be water proof with its lid epoxied and mechanically fastened. The water proof coating is a Sonneborn products HLM-5000 sealer for the outside and a Thoro Products Thoro-Seal for the inside. The Jensen risers and lids should be used and water proofed to the lid opening where the outflow pipe and electrical connect to the tank. Mr. Bill Beck of Jensen Precast has indicated that the tank weighs 9,000 lbs. It has two (2) 24- inch lids and risers. The tank length is 8 feet 1 inch,the width is 4 feet, and the height is 6 feet. For an empty condition with ground water at the ground surface (worst case situation for buoyancy),the tank will require 12 inches of aggregate base backfill with a unit density of 145 lbs/ft' to prevent floatation. Mr. Bill Beck, of Jensen's Los Molinos office(1-800-709-3000) can provide additional details regarding this tank, cost, and the water proofing sealant and mechanical fastening. The tank would be shipped from Sacramento, California. Septic Tank Battery: According to Crites and Tchobanoglous (1998), large tanks can be sized based on average daily flow, peaking factors, and the desired time between pump outs or cleaning. Due to the absence of daily flow monitoring, it is assumed a typical peaking factor of 1.5 is appropriate. The peaking factor(PF) the ratio of peak flow divided by average daily flow(ADF). Based on research,when the factor is multiplied by average daily flow (Q) and by the peak factor(PF),the total tank capacity can be determined by the desired pump-out frequency in years (Crites and Tchobanoglous, 1998). The following table presents tank sizes and were used for this calculation.