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Rev.0,4/22/11 Project 110219 4.6 Noise To address potential noise impacts from the LFGTE Facility on nearby receptors, a noise calculation was performed by Channel Island Acoustics in April 2011. The projected noise levels were modeled using the SoundPian 7.0 program. Project noise was evaluated by taking measurements at a similar Ameresco LFGTE facility located at the Keller Canyon Landfill and applying them to the topography at FSL. The study found that the nearest residences were approximately 7,000 feet or more from the plant. Projected noise levels from the plant at the nearest receptor are below 30 dB and are well below the San Joaquin County 45 dB nighttime criterion. 4.7 Utilities The LFGTE facility will use tanks and outhouse facilities to fulfill potable water and sanitation needs. Potable water will be obtained from existing wells at FSL. An outside company will be contracted to service the outdoor sanitation facilities. Power will be supplied by connecting to the existing adjacent power line. The LFGTE Facility is not anticipated to generate a large quantity of waste, and any waste that is generated will be disposed at FSL or other acceptable facilities. 4.8 Hydrology and Water Quality Surface water at FSL is managed in accordance with the federal, state, and local requirements. The entire FSL property is outside of the 500-year floodplain (JTD Figure 9 in Appendix C). The existing drainage system at the site comprises of a perimeter berm around the waste management unit which prevents run-on to the unit. This perimeter berm, along with a series of ditches, also controls all surface run-off during storm events, and directs surface run-off from the landfill to a retention basin on the east side of the site (JTD Figure 2 in Appendix C). During the year, the landfill operator repairs and re-grades (if needed) the storm water conveyance structures and implements drainage and erosion control best management practices. Erosion control on surfaces that will not receive refuse for extended periods is provided by placing intermediate cover and establishing vegetation on that surface. Vegetation is started by placing soil on the final surface that is scraped from surrounding grassy areas. This soil contains seeds of the grasses that are successful in that climate, and nutrients for vegetative growth. As stated previously, the LFGTE Facility will occupy approximately 0.7 acres of leased land near the southeast corner of the 800-acre FSL property. This development will result in approximately 0.27 acres (11,700 square feet) of new impervious area. The LFGTE Facility will be graded to allow the majority of the storm water runoff to sheet drain into an adjacent existing retention area. This existing retention area is contained within the current excavation (borrow) area for FSL, which will eventually become refuse disposal Module 2. This existing retention area infiltrates storm water and, according to County staff, has rarely discharged overland. An existing Storm Water Discharge Monitoring Point located at the south property line captures any X,TROJECTS\AWRESCO\110219-FOOTML LFGTE FACIIdrY\_ENGMERING\San Joaquin Comity Site Approval ApptiradonToodull LFGTE-Project Description(final 4-22-1ltdoc CORNERSTONE 4-3 LEWIS ENGINEERING Envi—nmeatal Gr p,LLC