Laserfiche WebLink
i <br /> 1.0 GENERAL <br /> 1.1 PURPOSE <br /> The purpose of this work plan is to present the procedures for the <br /> installation of four (4) dual Landfill Gas (LFG) extraction wells at Harney <br /> Lane Sanitary Landfill (HLSL). Well installation work will be according to <br /> the construction drawings and specifications of this project (Appendix). <br /> A. REASON FOR INSTALLING NEW LFG WELLS <br /> Detection of VOC compounds in HLSL's groundwater monitoring wells <br /> MW-4 and MW-2 indicate uninfluenced LFG from the landfill as the prime <br /> cause of impact to the groundwater in the near vicinity. The new dual <br /> extraction wells will increase LFG collection in the soil strata and in the <br /> refuse near groundwater monitoring wells MW-2 and MW-4; thus, reducing <br /> VOC impact to the groundwater. The Regional Water Quality Control Board <br /> has approved the installation of the new LFG wells as increase in corrective <br /> action to mitigate the impact to groundwater. <br /> The Contractor will be required to comply with this work plan and construct <br /> new dual LFG Extraction wells per the project's construction drawings and <br /> specifications. <br /> 1.2 SITE DESCRIPTION <br /> HLSL is a closed, unlined Class III landfill located at 14750 E Harney Lane <br /> in Lodi, California. The landfill covers approximately 127 acres, of which <br /> 112 acres were used for waste disposal and was divided into two fill <br /> sections, a primary and secondary site. The remaining area is comprised of <br /> access roads, storm water retention ponds, setbacks for environmental <br /> monitoring, and firebreaks. Land within 1,000 feet of the facility is used for <br /> grazing, agriculture and low-density residential housing. <br /> HLSL was certified closed in accordance with Title 14 in 1994. The closure <br /> cap consists of a 2- to 6-foot foundation layer under a 1-foot minimum thick, <br /> low-permeability soil layer, with a 1-foot thick vegetative surface layer. <br /> HLSL's closure included the installation of the closure cap, landfill gas <br /> (LFG) migration monitoring wells and groundwater monitoring wells. Since <br /> 1994, HLSL has been under postclosure maintenance. <br /> Work Plan—Dual LFG Extraction Well Installation San Joaquin County <br /> Harney Lane Sanitary Landfill Public Works Department <br /> Revised 11-18-09 1 Solid Waste Division <br />