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F SUMMARY reatment of wastewater influent from all sources (except the marina holding tank) will occur by c tanks that serve the Hero Lodges, Clubhouse, Restrooms Building and Laundry Building. Each Lodge has its own septic tank to trap items that may be flushed other than human waste, thereby protecting the Lift Station pumps and Package Treatment Plant operations. Effluent from these tanks will gravity flow to the Lift Stations that will pump collected septic tank effluent to the 1 Ok gallon settling/flow equalization tank which is the first phase of the Package Treatment Plant. Domestic water lines originating from the new well to serve all buildings have not been designed, as of the date of this Report. It is anticipated to install the lines around the outer perimeter of CGS to mitigate potential conflict with wastewater lines. The native soils appear to have significant denitrifying capability as evidenced by the soil chemistry test results in Table 1. Therefore, it is anticipated that the small concentration of nitrate within the treated effluent will undergo denitrification through the soil profile under the filter bed. The nitrate loading calculations on Page 5 indicate that nitrate loading from the CGS will exceed the Maximum Contaminant Level (MCL) for nitrate by 60%. Consequently, the effluent must undergo additional treatment by the proposed Package Treatment Plant. Attached Design Plans are Schematic Drawings (SD) and not Technical Drawings (TD) because: 1.) Future and final elevations are unknown, and 2.) The complexity of installing gravity flow fed septic tanks, Lift Station tanks and Package Treatment Plant tanks must be based on the owner's surveying team plotting exact locations of all proposed onsite improvements. Infiltrator EZFIow modules have been specified as filter media in lieu of washed drain rock because of the case of installing the modules. More than 20 truck and trailer transfer units would be needed to supply the required drain rock volume in comparison to one van trailer load for all the required EZFIow modules. Under Section 3.9 of the EHD Onsite Wastewater Treatment Systems Standards, "there shall be a minimum of five (5) foot separation between the bottom of the leach trench and perched water or the static groundwater table." The calculated separation distance has been determined to be 4.8 ft. Given the fact that effluent from this project will have undergone treatment; the calculated separation distance of 4.8 ft can be considered adequate. A Filtrol® 160 Washing Machine Lint Trap Filter should be installed on each washing machine after machine installation in the Laundry Building. Cut Sheets are found in Appendix I. As referenced in the Introduction, the project has a number of insufficient setback distances between the two onsite wells and adjacent septic tanks, and the holding tank. Consequently, under Section 11 of the EHD Standards, a variance is requested. Under Section 11.3, a Septic Tank Monitoring System (STMS) is proposed in support of this variance, as follows: Page -9 JJ - Chesney Engineering, Inc.