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1.0 BACKGROUND <br /> 1.1 PURPOSE <br /> This work plan presents the procedures for the installation of groundwater <br /> (GW) monitoring well MW-6 at Foothill Sanitary Landfill (FSL). <br /> 1.2 SITE DESCRIPTIO <br /> A. Foothill Sanitary Landfill <br /> FHSL is located in eastern San Joaquin County at 6484 N. Waverly <br /> Road, four miles east of Linden, CA. The landfill is a single Class III <br /> Waste Management Unit on an 800-acre parcel. This Unit is comprised <br /> of Module"I", Module 1, and future modules.'Future modules will <br /> overlap onto other completed modules, including Module "I" until final <br /> closure of the Unit. Waste discharged to the landfill includes <br /> commercial and household waste, construction/demolition Waste, and <br /> agricultural waste. <br /> 1. Geology and Hydrogeology <br /> The first water bearing zone encountered is in sandy gravel at a depth <br /> of more than 200 feet below the ground surface. Groundwater <br /> elevations vary between approximately 38 and 61 feet MSL. <br /> Groundwater elevations fluctuate less than one foot seasonally. The <br /> groundwater is unconfined or partially confined. Above the water- <br /> bearing zone, the soil layers are moderately to well-cemented layers of <br /> sandstone and siltstone with clay stone and conglomerates. This soil is <br /> mostly moderately slow in permeability with sporadic sandy layers that <br /> are well drained. <br /> 1.3 REASON FOR INSTALLING GW MONITORING WELLS <br /> The new GW well MW-6 will be installed as an additional GW well to <br /> groundwater as required by Regional Water Quality Control Board. <br /> 1.4 WELL LOCATION <br /> - The location of the GW monitoring well MW-6 is away from the refuse <br /> footprint (Figure 1-2). Well installation work will not include drilling into <br /> refuse or contact with refuse. Well location will be adjusted in the field <br /> based on site conditions. The well will be surveyed after installation. <br /> FH-UiW-6 GW Well Installation San Joaquin County <br /> September 17,2014 Department Of Public Works <br /> 1 Solid Waste Division <br />