COMPLIANCE INFO_1996-2003 - Laserfiche WebLink

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Memorandum To: Mike Miller, City of Stockton From: Wayne Pickus, CDM Date: August 25, 1998 Subject: Austin Road Landfill-Cover Material Borrow Source Excavation The purpose of this memorandum is to identify the issues associated with the initiation o:g a _ activities along the proposed Lirtle)ohns Creek realignment north of the Austin Road LandE L Excavation is required to establish a new borrow source for soil cover to support waste disposa. operations at the site. The current cover borrow source, the 45-acre parcel located southwest c:the waste fill,is currently at final grades. Background The current Solid Waste Facility Permit Boundary reflecting the expansion plans includes prove_:; approximately 220 feet wide running the length of the landfill's northern perimeter. This consd utes a portion of the total property which was recently annexed into the City of Stockton (City') and encompasses the flood plain for the creek realignment. It is this area which is addressed under he U.S. Army Corps of Engineers (Corps) Creek Relocation Permit and discussed in the Wetland Mitigation and Monitoring Plan for the Austin Road Landfill Expansion (Wetland Mitigation Plan),dated April 5, 1996,prepared by Jones&Stokes Associates,Inc. As requested by the City,Camp Dresser&McKee Inc (CDM)initiated the development of a grading plan to guide the excavation along the creek realignment Based on review of the Corps Permit Number 199400974 and the Wetland Mitigation Plan,it is our recommendation that grading operations be performed outside the proposed creek flood plain to the north. The basis for the recomme=dation is provided below. Permit Requirements The Corps transmitted Permit Number 199400974 to the City in correspondence dated May 17, 1997. The letter requested that the City finalize the Wetland Mitigation Plan and identify the company responsible for implementing and monitoring the plan within ninety days. The City informed the Corps at that time that grading would not occur in the near term,so the Wetland Mitigation Plan was not finalized. It appears that the Corps is anticipating a more formal grading plan to guide the excavation of the new creek alignment than the conceptual presentation provided in the Wetland Mitigation Plan. A section titled Channel Diversion Construction Guidelines on page 3-5 of the Wetland Mitigation Plan proposes guidelines to achieve a successful mitigation. The first guideline presented states: DRAFT T:1WPVWMOLlDV4rMIKE'AUSTiNRDTRFTMEMo.WPO