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CENTRAL VALLE EGIONAL WATER QUALITY AITROL BOARD <br /> INSPECTION REPORT <br /> DATE: 1 May 2007 <br /> FACILITY: Foothill Sanitary Landfill <br /> DISCHARGER: San Joaquin County Public Works <br /> LOCATION& COUNTY: San Joaquin County <br /> CONTACT(S): Michael Carroll <br /> INSPECTION DATE: 26 April 2007 <br /> INSPECTED BY: Todd Del Frate <br /> ACCOMPANIED BY: <br /> SUMMARY: <br /> Following the site inspection at North County Recycling Center and Sanitary Landfill, staff proceeded to <br /> Foothill Sanitary Landfill to inspect Module I,and the ET cover installed during construction season <br /> 2006. The main reason for this inspection was to observe the limited growth of vegetation planted on the <br /> ET cover. Mike Carroll of San Joaquin County informed staff that the vegetation was not covering the <br /> Module I as predicted. Pictures sent by Mike Carroll confirmed this observation. <br /> Staff inspected the ET cover and side slopes of Module I without San Joaquin County escort. As shown <br /> in Figures I through 3, the side slope vegetative cover is quite thick and appears to be healthy. In contrast <br /> , the vegetative cover observed at the top of Module I has not developed or grown as expected as shown in <br /> Figures 4 through 6. The exception to the poor vegetative cover performance is the southwestern portion <br /> of the ET cover that has a relatively healthy vegetative growth (Figure 7). <br /> The ET cover also incorporates an ET Test Section constructed as a Pan Lysimeter to record infiltration <br /> and percolation of seasonal rainwater. The site inspection revealed a vegetative cover that appears to be <br /> struggling to establish a healthy cover. Figures 8 and 9 show the lack of vegetation established on the ET <br /> Test Section. San Joaquin County has indicated they will attempt to re-plant the areas that have not <br /> established the appropriate density of vegetation. <br /> Staff completed the site inspection by driving to other areas of the landfill. All erosion and drainage <br /> controls appeared to be in place. Downcomers installed on Module I were anchored at the top and along <br /> the side slopes; inlets were lined with coarse rock for erosion control. Standing water was not observed at <br /> any location of the landfill. The working face width and height was kept manageable and well organized <br /> (Figure 3). Staff conducted a quick site inspection of the flare and LFG system as shown in Figure 10. <br /> CIWQS 11D#1052527 <br /> Approved: <br />