2023-098 - Laserfiche WebLink

Home Browse Search

Environmental Consulting & Contracting March 27, 2023 Brian Lewis Landfill Operations Manager Republic Services 1327 741h Ave SE Vero Beach, FL 32968 Subject: Proposal to Extend Side Slope Collectors Indian River Landfill, Vero Beach, Florida Dear Mr. Lewis: SCS Field Services (SCS -FS) is pleased to provide this proposal to you for the subject work based on discussions between SCS -FS, Indian River County (County) and Republic Services (Republic). SCS -FS is prepared to schedule the work following approval by Republic. A summary of the scope of work and cost is outlined below. SCOPE OF WORK In August of 2021, the gas collection and control system (GCCS) was expanded into cell one of segment three. The GCCS expansion included ten side slope collectors (SC). Each SC had two or three separate collection pipes so that as waste is filled in cell two of segment three the collection pipes could be utilized at different elevations. In May and July of 2022 SCS -FS extended ten of the second highest side slope collector pipes. The waste has now reached the same elevation as the third highest and last remaining section of collection piping on four of the SCs. These collection pipes should be extended out into the cell floor of cell two at its current elevation so that additional landfill gas (LFG) can be captured by the GCCS and increase overall gas quality and flow at the LFG flare station. SCS -FS will provide labor, equipment and materials to extend each SC collection pipe approximately 300 to 370 feet into cell two at a 5% slope so that LFG liquids drain back into the landfill. Each extension length will depend on site conditions, filling operations and any obstructions that may be encountered while trenching. The extension piping will be 6 -inch HDPE SDR 11 perforated pipe. Geotextile fabric will be placed along the bottom of the trench and backfilled with six inches of crushed concrete. An additional foot of crushed concrete will be placed on top of the collection pipe once it is placed in the trench and the geotextile fabric will be wrapped over the top. Excavated waste will be used to backfill the remaining trench. Any excess waste that cannot be backfilled will be transported to the active fill area by SCS -FS. If SCS -FS determines that the depth of the trench has become too deep to use geotextile fabric the collector pipe will only be backfilled with six inches of crushed concrete below and one foot above the pipe. SCS -FS and John B. Webb & Associates, Inc. (JBW&A) will stake out the existing top of pipe locations at each SC to be extended prior to the mobilization of equipment to the site. After the completion of the SC extensions SCS -FS and JBW&A will perform an as built field survey of each extension pipe. JBW&A will update the as built plans that were provided by the County. 5850 S. Semoran Blvd., Orlando, Florida 32822