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WASTE DISCHARGE REQUIREMENTS ORDER NO. R5-2003-0049 -2- FORWARD INC. AND ALLIED WASTE INDUSTRIES FOR OPERATION OF FORWARD CLASS II LANDFILL SAN JOAQUIN COUNTY 6. The closest fault,the Tracy-Stockton Fault Zone is approximately 6.5 miles to the northwest. Maximum Credible Earthquake Moment magnitudes for faults within 100 miles of the facility range between 6.7 and 7.9 on the Richter scale. The maximum credible horizontal ground acceleration for the site is 0.13 g. 7. Land uses within 1,000 feet of the facility are agriculture and residential. The Stockton Metropolitan Airport is approximately one mile from the site, Youth and Women's criminal detention facilities are approximately 1,900 feet north of the site, and the BNSF Intermodal Facility is approximately one mile northeast of the site. 8. The facility receives an average of 14.27 inches of precipitation per year as measured at the Stockton Weather Station approximately eight miles northwest of the site. The mean pan evaporation is 78.43 inches per year as measured at the Oakdale Woodward Dam Station, located approximately 13 miles southeast of the site. 9. The 100-year, 24-hour precipitation event is estimated to be 3.25 inches,based on Department of Water Resources' bulletin entitled Rainfall Depth-Duration-Frequency for California, 1981. 10. Part of the waste management facility is within a 100-and 500-year flood plain based on the Federal Emergency Management Agency's(FEMA)Flood Insurance Rate Map. Ongoing realignment of the North Branch of Little Johns Creek should eliminate the floodplain areas from the landfill footprint. 11. There are 35 domestic, industrial,or agricultural groundwater supply wells within one mile of the site. WASTE AND SITE CLASSIFICATION 12. The Discharger discharges designated,nonhazardous, and inert solid wastes to Class II landfill units. Designated and nonhazardous solid wastes include,but are not limited to asbestos, commercial and industrial waste, municipal solid waste, coal and wood ash, contaminated soils, salty wastes,construction and demolition waste, shredder waste and dewatered sewage sludge. Contaminated soils may include,but are not limited to, treated, and untreated petroleum products,metals or other constituents. Designated wastes are defined in §20164 of Title 27. Nonhazardous solid wastes includes municipal solid wastes, as referred to in the Code of Federal Regulations, Title 40, Part 258.2. 13. The Discharger discharges wastes containing greater than one percent friable asbestos in units with single composite liners. These wastes are classified as `hazardous' under Title 22 of CCR. However,because these do not pose a threat to groundwater quality, Section 25143.7 of the Health and Safety Code permits their disposal in any landfill which has waste