Laserfiche WebLink
WASTE DISCHARGE REQUIREMENTS ORDER NO. R5-2010-0016 -14- <br />SAN JOAQUIN COUNTY DEPARTMENT OF PUBLIC WORKS <br />NORTH COUNTY LANDFILL <br />SAN JOAQUIN COUNTY <br /> <br /> <br />Future Modules <br />55. Future module development will be in a sequential, counter-clockwise order. Each <br />new module will be constructed in advance of filling the prior module to final refuse <br />grade. The latter will occur before filling of the new module begins. Existing <br />facilities in the eastern area of the site (e.g., MRF and gas wells SG-5, 6 and 7) will <br />be decommissioned prior to development of that area. <br />56. The Discharger plans to construct future modules consistent with existing <br />approvals for Module 4, or as separately proposed and approved for a new <br />module. Specific designs and construction plans will be submitted for approval as <br />each module is proposed for development. Construction Specifications D.1 <br />through D.4 of these WDRs require that new modules be constructed in <br />accordance with either the Title 27 prescriptive standard design or the approved <br />EAD and performance demonstration for Module 4. Construction Specification D.4 <br />further allows for the Executive Officer to approve less than significant changes to <br />these designs, but requires Board approval of substantive changes. <br /> <br />Vertical Expansion Plan <br />57. The JTD submitted by the Discharger incorporates the Discharger’s Vertical <br />Expansion Plan (VEP) for the landfill (December 2007 report 30% Design Report <br />for Vertical Expansion of the North County Recycling Center and Sanitary Landfill, <br />prepared by Shaw Environmental, Inc.). Vertical expansion is proposed as a <br />component of a revision of the Facility Operating Permit. The VEP would increase <br />the height of the landfill modules as follows: <br />Module Fill Elevation, Feet MSL1 Fill Thickness, Ft 1, 2 <br /> Avg. Base Previous Maximum Proposed Maximum <br />1 87 190 235 148 <br />3 65 190 2303 165 <br />4 64 190 300 228 <br />5 - 11 66 190 320 254 <br />____________________________ <br />1. Maximum elevation includes cover material. <br />2. Maximum difference between proposed final grade and base elevation contours. <br />3. Fill height reduced from 260 feet MSL based on results of geotechnical analysis (see <br />Finding 58). <br /> <br />Existing Modules 1 through 4 would be filled to the proposed maximum fill <br />thickness (148 – 228 ft MSL) prior to filling at Module 5, which, in turn, would then <br />be filled to its maximum thickness (254 ft MSL) before initiating operations in <br />Module 6, and so on.