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convey all storm water runoff to the southeast corner of the site, at which point the water will naturally drain to Corral Hollow Creek. The groundwater monitoring network is in place and consists of three deep aquifer monitoring wells (MW -1, MW -2, MW -3) and two shallow aquifer monitoring wells (MW -4, MW -5). All five groundwater monitoring wells as well as two surface water locations are monitored on a quarterly basis. Samples collected from the groundwater monitoring wells are tested for the quarterly and annual parameters listed in the Waste Discharge Requirements Order # 87-088 (attached) under GROUND WATER MONITORING. Samples collected from the surface water locations on Corral Hollow Creek are tested for the parameters under SURFACE WATER MONITORING. This monitoring will continue in accordance with Waste Discharge Requirements Order # 87-088. H C DRAINAGE SYSTEM EXPLANATION The drainage facilities are designed in accordance with the County of San Joaquin Department of Public Works, Manual for Storm Drainage Design (January 1973), except that the drainage facilities at the landfill are sized to accommodate the volume and peak flow rate expected from a storm having a 100 year -24 hour frequency instead of the 10 year frequency. The intensity -duration curve for the 100 year rainfall was developed from data for the Stockton Disposal Plant as provided in the National Oceanographic and Atmospheric publication, Precipitation - Frequency Atlas of the Western United States (1973). The final grade of the cover over the landfill shall be at a minimum slope of 3 percent as required by the regulations. Storm water runoff from the top of the landfill will be directed to the drainage ditch system that encircles the top of landfill. The drainage ditch will be typically graded at 0.2 percent toward_ a downdrain located approximately in the middle of the southwest -- northeast trending slope. Drainage channels around the site will convey all storm water runoff to the southeast corner of the site, at which point the water will naturally drain to Corral Hollow Creek. The groundwater monitoring network is in place and consists of three deep aquifer monitoring wells (MW -1, MW -2, MW -3) and two shallow aquifer monitoring wells (MW -4, MW -5). All five groundwater monitoring wells as well as two surface water locations are monitored on a quarterly basis. Samples collected from the groundwater monitoring wells are tested for the quarterly and annual parameters listed in the Waste Discharge Requirements Order # 87-088 (attached) under GROUND WATER MONITORING. Samples collected from the surface water locations on Corral Hollow Creek are tested for the parameters under SURFACE WATER MONITORING. This monitoring will continue in accordance with Waste Discharge Requirements Order # 87-088. H C