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two month period (December and January). The surface area used for the initial pond is 90,000 square feet which allows for pad expansion of 30,000 square feet over that initially installed. Water balance (precipitation minus evaporation) calculations were modeled on a monthly basis by summing runoff generation, direct rainfall on the pond surface and evaporation from the corresponding water surface area. The volume of runoff at the end of a month was then correlated to a specific depth based on the pond geometry. Water balance worksheets and tables for evaporation and precipitation are included in Appendix C. For the critical two month period the water balance indicated approximately 20,000 cubic feet will be contained within in the pond with at least 2 feet of remaining freeboard. The two feet of freeboard will provide an additional 20,200 cubic feet of storage in order to contain the volume of runoff estimated from the 100- year/24-hour storm event (16,900 cf). In addition to evaporation, compost leachate will be reused into the composting operations. Based on the moisture content of incoming compost material, the quantity of water needed in the compost process is nearly ten times the amount of runoff generated during the mean annual precipitation. Therefore, the evaporation will be pumped continually and be dry except during periods of extreme precipitation. Backup provisions will be established for tanker trucks to be available on an on call basis if needed. . Monitoring of the compost leachate will be performed as discussed in Section I.B of this report. 10. SITE ACCESS All vehicles, except employee traffic, will enter and exit the facility at the main entrance near the north end of the site from McArthur Drive. Figure 3 shows the main access road and access way to the Composting Facility. Figure 5 is a Traffic Flow Plan that indicates traffic routes for all waste material traffic. Figure 7 is the Compost Area Site Plan that indicates traffic patterns at the Composting Facility and shows unloading for both commercial and self-haul vehicles, parking and load out areas. All on-site roads and vehicle routes will be paved with either asphalt concrete or portland cement concrete and will provide all-weather access. A Geotechnical Investigation for the facility has been done by RGH Geotechnical and Environmental Consultants. Based on near-surface soil samples and R-value testing, pavement sections have been designed both heavy truck traffic and lighter vehicle traffic. The assumed Traffic Indices (TI) of 7.0 for heavy truck traffic and 4.5 for parking lot lanes and driveways, are assumed to be representative of the anticipated traffic. Pavement thicknesses were computed using Method 301 F of the CalTrans Highway Design L:/PROJECr/397/MRF/RC14.TCY December 15, 1993 13