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FFintothecompartment of the first conventional septic tank, as is common practice. O+G bove 30 mg/L can be detrimental to the permeability of the receiving soils by l pores. Also, waste streams with O+G concentrations exceeding 30 mg/L can rmance of Package Treatment Plants (PTP). In addition to analysis of O+G from the grease tank, other constituents-of-concern were also analyzed for comparison with the analysis of the conventional septic tank effluent. As noted, there is a significant Total Kjeldahl Nitrogen(TKN) concentration in the grease tank and a Total Suspended Solids (TSS) concentration that is more than double the conventional septic tank. The Biochemical Oxidation Demand (BODS) measures wastewater strength with the test results indicating an extremely high strength wastewater at 3663 mg/L. TABLE 3 Analysis of Effluent Analysis of Effluent Crites and I-S.E.P.A. ANALYTE From Last from the Last Grease Tchobanoglous: Conventional Septic Interceptor Tank Residential Complete Mix Tank:. (Roth Tanks Nixed) Septic Tank Values Total Kjeldahl Nitrogen 66.7 mg/L 52.7 mg/I. 70.3 mg/L 35-100 mg/1. (TKO) (59.7 mg/L I Ammonia Nitrogen 31.5 mg/L 11.7 mg/L 41.2 mg/L 6-18 mg/L (NH,-N) (21.6 mg/L) Organic Nitrogen 35.3 mg/L 41.0 mg/L 29.1 mg/L 30-82 mg/L (38.2 mg/l,) Total Suspended Solids 216 mg/L 472 mg/L 503 mg/L 200-290 mg/L (TSS) (344 mg/L I Biochemical Oxygen 836 mg/L 3663 mg/L 450 mg/L 200-290 mg/L Demand(BODS) (2250 mg/L) PH 6.3 4.8 N/A N/A Total Alkalinity 390 mg/L 161 mg/L N/A N/A Oil and Grease N/A 232 mg/L 164 mg/1. N/A CONCLUSIONS AND RECOMMENDATIONS The soils within the proposed disposal area reveal favorable permeability characteristics from four ft below existing grade down to 25 ft. The final grade is proposed to be approximately one ft lower than current grade in this area. This will place the bottom of the filter bed disposal structure, and therefore the soil-effluent interface, at the top of permeable strata. Regarding the referenced sand stratum from 10 ft to 15 ft below grade and the possibility of adverse permeability conditions created by the phenomenon of percolating effluent congregating on top of this sand stratum: Since the coarser stratum is comparatively thin(five ft thick)with the soil becoming a uniform loam from 15 ft to 25 ft in depth, no adverse effects are expected. As referenced, there may be anaerobic conditions above this sand stratum which promote denitrification. Page 5 of 7 Chesney Consulting