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7AIthough there have been some changes in assessing nitrate loading parameters that differ from the nitrate loading parameters for this project(namely flow volume projections), so to maintain consistency,the remaining nitrate loading parameters used in my August 2001 report will be used in this Addendum since they are still applicable. From the anticipated wastewater characteristics described above, the nitrogen emanating from the project may be similar to what would normally be found in a typical domestic or household system. Although this is generally accepted to be 66 mg N/L/day,the originally calculated nitrogen loading concentration of 128 mg N/L/day will also be estimated for this Addendum, with nitrogen concentration reductions factored in for a final concentration of 90 mg N/L (See below). B. CALCULATED NITRATE-NITROGEN LOADING The calculated nitrate-nitrogen impact to the soil and ultimately to the groundwater is difficult to determine due to the large number of variables involved, and variables unknown at this time. These include: 1.) Impact from upgradient nitrate sources, 2.)Variability in wastewater flows, nitrogen concentrations and dilution effects from effluent and stormwater recharge, 3.) Changes in groundwater directional flow and elevation, and 4.) Denitrification potential within the soil environment and within the underlying confined and unconfined aquifers. The Hantzsche/Finnemore Formula is used below to predict the average resultant concentration of nitrate-nitrogen in the effluent recharge water. As calculated below,the property has been assessed on a gross developed area and not total areal loading basis. The gross developed area includes all of the area to the south of the Clubhouse/Hospitality Room bound to the east by the ski lake and to the west by the disposal area. This area is correlated with the ADF of 892 gals. These two factors primarily dictate the average resultant concentration of nitrate-nitrogen in the recharge water, which is considered exceeded if it is more than 10 ppm nitrate-nitrogen(45 ppm as nitrate). NLS§3.4,3.5,3.6 PREDICTED NITRATE-NITROGEN LOADING FROM THE HOSPITALITY ROOM EXPANSION OF THE EXISTING EAGAL LAKES CLUBHOUSE USING THE MAXIMUM AVERAGE DAILY FLOW(ADF)OF 892 GALLONS PER DAY AND TAKING THE GROSS DEVELOPED AREA OF 4.13 ACRES INTO CONSIDERATION: HANTZSCHEIFINNEMORE EQUATION INW(1 -d)+RNb Nr= (I+R) Where: Nr= Resultant average concentration of nitrate-nitrogen in recharge water-(ppm NO3-N) I = Volume rate of wastewater entering the soil averaged over the gross developed area in inches per one-half yr. The facility is only open for six months out of the year. Nw= 128 mg N/L: 20%reduction from septic tank+ 10%removal from biomat=90 mg N/L d = Fraction(%)of nitrate-nitrogen loss due to denitrification in the soil R = Average recharge rate of rainfall-inches per yr NLS§3.2 Ni,= Background nitrate-nitrogen concentration of rainfall recharge,exclusive of wastewater influences (ppm NO3-N) 7 Chesney Consulting