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T jr-.9- d(o!O - Cr ✓� v 3 4 +r �.... S Evv. u <br /> II. SCOPE OF WORK <br /> STAGE ONE: PRELIMINARY SITING STUDIES <br /> In California regulations for siting and design of new landfill facili- <br /> ties are contained in Subchaper 15, Chapter 23 of the California Admini- <br /> strative Code (commonly refered to as Subchapter 15) . <br /> Article 3 of Subchapter 15 contains siting requirements for new and <br /> existing landfills in the State of California. The siting requirements <br /> for new Class III landfills, such as the Harney Lane Replacement Site, <br /> specify that landfills shall be sited in areas that ensure no impairment <br /> of beneficial uses of surface or ground water beneath or adjacent to <br /> landfills. Factors that shall be evaluated include: <br /> • size of the waste management unit <br /> • permeability and transmissivity of underlying soil <br /> i • Depth to ground water <br /> I • Background quality of ground water <br />! • Current and anticipated use of the ground water <br /> • Annual precipitation <br /> Where consideration of these factors indicates that site characteristics <br /> alone do not ensure protection of the quality of ground water or surface <br /> water, Class III landfills are required to have a single clay liner with <br /> permeability of 1 x 10-6 cm/sec or less. <br /> As part of the facility permitting process a report must be submitted to <br /> the Regional Water Quality Control Board (RWQCB) describing the site <br /> sitting and how the disposal unit may affect ground and surface water <br /> (described in Article 9 of Subchapter 15). In the case of the Harney <br /> Lane replacement site the report will be used by RWQCB to evaluate <br /> whether the proposed location meets the classification criteria for a <br /> PRA 8610-22D II-1 <br /> EmCon Associates__J <br />