Laserfiche WebLink
into the refuse at least as effectively as the prescriptive barrier layer(one foot thick with permeability of 10"6 <br /> cm/sec or less). <br /> ® A key component of this method is the vegetation on the cover. Perennial plants, such as purple needle grass <br /> and California Brome, send roots deep within the soil to gather moisture,providing storage capacity during <br /> the rainy season. In contrast, annual species, such as rye grass,may produce a thick cover during their <br /> growing season,but produce shallow roots which cannot remove moisture from deep within the cover layer. <br /> The ET cover was established in December 2008 when the soil of much of the top deck area was amended, <br /> fertilized and reseeded. The cover vegetation continues to flourish. <br /> Results of monitoring in the 20010-2011 rain year indicate that the ET cover is successful,that the measured <br /> percolation in the test area is approximately one-half of that calculated for an intact prescriptive cover(report <br /> previously submitted). <br /> The surfaces of the landfill, including the ET cover area, are grazed annually to facilitate inspection by the <br /> LEA. <br /> ANNUAL FACILITY INSPECTION <br /> Foothill Landfill was inspected to assess damage to the drainage control system, groundwater monitoring <br /> equipment in September 22, 2011. <br /> Generally,the site was found to be in excellent condition due to the improvement of drainage in 2006 and <br /> ongoing drainage system maintenance by the site superintendent. Groundwater monitoring equipment <br /> ® remained in good condition. Site Photos are provided below. <br /> Foothill Sanitary Landfill 13 Department of Public Works/Solid Waste <br /> 2nd Semester and Annual 2011 Groundwater Monitoring County of San Joaquin—January 31,2012 <br />