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® Page 1-7 SECTION 1 -LANDFILL EXPANSION ISSUES Table 1.3 LINER, LEACHATE COLLECTION, AND VADOSE MONITORING REGULATORY CRITERIA Citation Regulation Design Element Tits 14, 17628 General Design Parameters: Each site Composite liner system with leachate design shall be based on... leachate collection and leak detection monitoring. control—provisions for monitoring. Title 14, 17629 Public Health Design Parameters: Composite liner and leachate collection Disposal sites shall be designed...factors system will protect water quality by which shall be taken into consideration controlling landfill leachate discharge. are air and water quality. Title 14 17781 (b) (1) Leachate Control During Closure and Leachate collection system will be able to Post-closure: Leachate Monitoring: provide monitoring for leachate. operator shall monitor leachate quality Collection system forms the lowest and accumulation. System shall be elevation points of the landfill. Leak located at lowest landfill elevation... detection system will monitor movement detect-movement of leachate through of leachate through the finer system. finer. Title 14, 17781 (b) (2) Closure ancl Post-Closure:The operator Leak detection system to function as shall design and operate a vadose zone vadose monitoring system. monitoring system ...in accordance with' Title 23,CCP, subchapter 15, section 2559. Title 23,2530 classification and Siting Criteria:All now Minimum elevation of finer is set at 20 landfills...shall be sited, constructed, and MSL to assure adequate separation from operated to ensure that wastes will be a groundwater. minimum of 5 feet above the highest anticipated elevation of underlying groundwater. Title 23,2533 (b) Where considerations of factors...Class III Composite liner with 2 foot clay layer of I landfills shall be required to have a single X 10,7 CnVS9c exceeds requirement. clay finer with permeability of 1 x 10'` cm/sec or less. Title 23,2542(b) For a Class III landfill, a clay liner,...be a Composite liner with 2 foot clay layer of 1 minimum of I foot thick. X I If cm/see exceeds requirement. 1109 23,2542(c) Synthetic liners shall have a minimum Synthetic finer will be HDPE with a thickness of 40 mils. minimum thickness of 60 mils. Title 23,2543 (a) Leachate collection and removal systems Design incorporates a leachate collection required for... Class III landfills which system composed of a drainage layer have a finer. over the extent of the liner and system of collection trenches and pipes. Title 23,2543 (b) Where leachate collection and removal Leachate collection system Is designed to are used,...shall be designed, collect and remove 100 year,24 hour constructed, maintained,operated to storm based on an exposed finer system collect and remove twice the maximum with no refuse and a safety factor of 2. anticipated daily volume of leachate.. FL W.Sack ant!AssoftW C;*,y of Stockton 1811.002