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OPERATING DAILY NUMBER OF DAILY AND CROP MONTHS AND EMPLOYEES WEEKLY DAYS OF THE AND TYPE WASTEWATER WEEK FLOW February thru April Agricultural-50 x 15 gals/person 58 x 15 870 gals/day ASPARAGUS 7 days/wk Office-2 x 15 gals/person 870 x 7—6090 gals/wk Truck Drivers- 6 x 15 gals/person May thru June Agricultural-60 x 15 gals/person 68 x 15 — 1020 gals/day CHERRIES Office-2 x 15 gals/person 1020 x 7=7140 gals/wk 7 days/wk Truck Drivers-6 x 15 gals/person Agricultural-45 x 15 gals/person 53 x 15 =795 gals/day ONIONS July thru August Office-2 x 15 gals/person 795 x 6=4770 gals/wk 6 days/wk Truck Drivers-6 x 15 gals/person September thru Office-2 x 15 gals/person 2 x 15 =30 gals/day NONE January 5 days/wk 30 x 5 = 150 gals/wk E B. CALCULATED IMPACT FROM NITRATE-NITROGEN LOADING The calculated or predicted nitrate-nitrogen impact to the soil and ultimately to the groundwater is difficult to determine due to the number of variables involved. These variables include 1.) Influence from upgradient nitrate sources, 4.)Variability in wastewater flows, nitrogen concentrations and dilution effects, 5.) Changes in groundwater directional flow and elevation, and 6.) Denitrification potential. From the wastewater characteristics anticipated, the nitrogen emanating from the project may be at a higher concentration than what would normally be found in a typical domestic or household system. This can be attributed to the lack of a dilution effect that graywater from showers, laundry, etc. would contribute. There will be no cooking within a kitchen or office area and therefore, no need for a garbage disposal. Consequently, there should be no highly concentrated organic loading. The characteristics of the wastewater flow will be predominately blackwater from toilets, with a comparatively small volume of graywater from sinks. Other wastewater constituents may consist of coffee,juices or other similar type liquids to the system. Various scientific methods exist to estimate nitrate-nitrogen loading. This study uses the Hantzsche/Finnemore Formula to predict the average resultant concentration of nitrate-nitrogcn in effluent recharge water. As calculated below, only the area of the packing sheds, docks, trailer parking area, etc. are used for the areal loading basis, which excludes the walnut orchard. This is an area of approximately 11 acres from the total acreage of 171 acres. The walnut orchard acreage will be assessed for nitrogen separately. 7 Va(Zey Ag research