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II. Project Description <br /> existing landfill. The residence at 9621 Austin Road would be removed with the project. The <br /> residence at 9690 Austin Road would be within 500 feet of the proposed landfill. There are <br /> approximately seven residences along Austin Road between Arch Road and French Camp Road <br /> (SCe Figure H.1). The Northern California Youth Center,a criminal detention facility,is located <br /> 1.900 feet north of the Austin Road Landfill. With the project,the borrow area would be <br /> approximately 300 feet from the detention facility. The Stockton Metropolitan Airport is <br /> approximately 7,500 feet east of the existing landfill. <br /> C. CHA <br /> CLASSIFICATION OF SITE <br /> Landfills are assigned Class designations by the Regional Water Quality Control Board <br /> (RQCB)based on the types of wastes they are designed to accommodate. The proposed <br /> landfill expansion would be designed to meet or exceed Class III standards,as defined under <br /> Title 23,Chapter 15 regulations of the State Water Resources Control Board,and to meet or <br /> exceed new federal landfill regulations. <br /> On October 9, 1991,the United States Environmental Protection Agency A)released new <br /> regulations for landfills and landfill extensions. These new regulations are found in 40 Code of <br /> Federal Regulation,Part 258,and are intended to implement parts of Subtitle D of the Resource <br /> and Conservation Recovery Act(RCRA). The new regulations require all new landfills and <br /> extensions of existing landfills to have a composite liner system consisting of two feet of clay <br /> with a permeability of less than 10-7 centimeters per second and a synthetic liner at least 60 <br /> thousandths of an inch thick(60 mil). <br /> SLUDGE TREATMENT <br /> The City of Stockton Municipal Utility Department stockpiled approximately 20,000 to 25, <br /> 000 <br /> cubic yards of digested sewage sludge at the Austin Road Landfill. The Regional Water Quality <br /> Control Board has permitted the landfill operators to use this material as the foundation for the <br /> final cover if the necessary compaction could be achieved. DPW was concerned that this <br /> compaction requirement might be difficult to achieve,and therefore has decided to stop <br /> accepting sludge and asked the Department to remove the stockpile at,the landfill. This task will <br /> be performed prior to closure of the existing landfill. Removal of this material is not a part of <br /> 11.6 <br />