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Taj M. Bahadori -2- 27 December 2017 <br /> San Joaquin County DPW <br /> Stockton <br /> plans/specifications approved by the project design engineer(Geo-Logic Associates, Inc.) included <br /> the following: <br /> - Relaxation'of the LCRS gravel particle size specification for maximum percentage passing <br /> through the#1200 sieve. See interim approval letter (Enclosure 2); <br /> - A slightly higher maximum apparent opening size (AOS) for the 8 oz. geotextile layer (0.20 mm <br /> vs.,0.18 mm);"and <br /> - A hori2ontal seam in the geocomposite and geomembrane layers along the western side slope. <br /> (More than one panel was needed to span of the western side slope (from top to bottom) for <br /> each of these materials.) <br /> The work also included installation of groundwater detection monitoring well G-9 along the <br /> southwestern perimeter of the Module 5 area per the approved design report. An installation report <br /> for this well (Well Installation Report for Well G-9, North County Landfill) was separately submitted <br /> (uploaded to Geotracker) by the Discharger on 18 December 2017 for Water Board staff review <br /> and approval. <br /> The Final CQA Report includes a certification that Module 5B was constructed in accordance with <br /> the approved construction drawings, specifications, and CQA plans, and in conformance with Title <br /> 27 and Subtitle D requirements. Based on this certification and the information in the report, <br /> including design variances, the Final CQA Report for Module 5B is hereby approved. Module 5B <br /> may therefore be operated on a long-term basis once the installation report for monitoring well G-9 <br /> has been approved by Water Board Compliance and Enforcement Unit staff. <br /> If you have any permit-related questions, please contact me by telephone at (916) 464-4641 or by <br /> email at iohn.moody@waterboards.ca.gov. For compliance-related questions, please contact <br /> Todd Del Frate of our Compliance and Enforcement Unit by telephone at (916) 464-4737 or by <br /> email at todd.delfrate@waterboards.ca.gov. <br /> John Moody, P.E. <br /> Water Resource Control Engineer <br /> Title 27 Permitting and Mines <br /> Enclosures <br /> 1. Design Report Approval Letter <br /> 2. Interim CQA Report Approval Letter <br /> cc w/o enclosures: <br /> Christine Karl, Permitting & LEA Support, CalRecycle, Sacramento (email only) <br /> Robert McClellon, San Joaquin County Environmental Health Department, Stockton <br /> Michael Raub, Advanced Earth Sciences, Inc., Irvine <br /> Jake Russell, Geo-Logic Associates, Inc., Grass Valley <br />