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D. SURFACE WATER, RAINFALL/STORM WATER FOR THE HOME RANCH, ACAMPO RANCH AND BLOSSOM RANCH SURFACE WATER-HOME RANCH Surface water storage structures at the Home Ranch as denoted on the attached Site Plan consist of one primary unlined tailwater ditch, a secondary unlined tailwater ditch, two concrete-lined irrigation ditches, one primary unlined irrigation conveyance ditch, three manure separation (settling) basins and one holding pond (lagoon). Surface water runoff from rainfall and/or irrigation enters all of these structures. Although not part of the Home Ranch, a State Canal referenced as Beaver Slough is located adjacent to the north property boundary. Irrigation water that may or may not contain manure, cannot runoff and impact Beaver Slough since there is an approximate 15-foot levee between the north end of the de Snayer Dairy cropland and this Slough. SURFACE WATER-ACAMPO RANCH Surface water storage structures on the Acampo Ranch include a primary holding pond to the north of the facility, a primary unlined irrigation water ditch, tailwater ditches, and a tailwater/silage liquor runoff secondary pond, at the south end of the facility near Acampo Road. Manure from the northern corrals and calf pens can enter the primary pond. Surface water runoff from rainfall enters all of these structures, while irrigation water runoff only enters the irrigation/tailwater ditches. SURFACE WATER-BLOSSOM RANCH Surface water structures on the Blossom Ranch include a primary irrigation water conveyance ditch that traverses north-south and tailwater conveyance ditches at the ends of the furrow irrigated rows. Irrigation water is obtained from Hog Slough at the south end of the Ranch. A tailwater pond is also located near the south end of the Ranch. RAINFALL AND STORM WATER-HOME RANCH,ACAMPO RANCH AND BLOSSOM RANCH The Flood Insurance Rate Map (FIRM) Community Panel Number 060299 0110B and 0120B illustrates the Home Ranch and the Blossom Ranch to be in Flood Zone A1; areas of 100 year flood where the base flood elevation has been determined to be 8 ft MSL. The west side of the Home Ranch is approximately 5 ft MSL and the east side of the Ranch where the containment structures are located is approximately 8 ft MSL. The Acampo Ranch is in Flood Zone B; areas between limits of the 100 year and 500 year flood. Figure 29 of the National Oceanic and Atmospheric Administration(NOAA), Atlas 2, Volume XI, illustrates the 25 year, 24 hour storm isoluvials for the area of the three Ranches to be 3.0 inches. The average Mean Annual Precipitation for the three Ranches is 15 inches, according to the San Joaquin County Isohyetal Map. The following information illustrates the average rainfall data during the winter months to determine Home Ranch holding pond capacity,taken from the NRCS Soil Survey of San Joaquin County: -6- CheRwy Consufting