Laserfiche WebLink
Mr. John Moody 0 - 3 - 0 <br />PLACING ADDITIONAL REFUSE ON EXISTING UNLINED FOOTPRINT <br />AT FOOTHILL SANITARY LANDFILL <br />We anticipate that preparation for refuse placement, including installing the horizontal collector, will <br />begin in late March 2014, and that refuse will be placed over the collector soon thereafter. This <br />horizontal collector will be put into service as soon as it has sufficient cover to be effective. <br />In our meeting we acknowledged that the HDPE geomembrane was placed over refuse with the <br />best intentions, that is, to protect groundwater quality. We also presented evidence that this <br />geomembrane may have caused groundwater impacts at our site. We anticipate that we will be <br />able to mitigate this impact by increasing the collection rate from our LFG wells in April 2014, when <br />the Landfill Gas to Energy Project becomes active. However, if this additional collection is not <br />sufficient, then we will consider how to collect the LFG from the source, that is, from beneath the <br />HDPE geomembrane. We contemplate installing one or more vertical LFG wells extending through <br />the geomembrane for that purpose. Such wells would be provided with a bentonite seal at the <br />geomembrane to ensure maximum collection below the membrane (Figure 3). <br />Please let me know if I have misunderstood the relevant regulatory issues, or if I have incorrectly <br />related the substance of our discussion. <br />Thank you again for your attention to this matter. If you have any questions, please call me at (209) <br />468-8504. <br />Sincerely, <br />W. MICHAEL CARROLL, PE <br />Senior Civil Engineer <br />WMC:kb <br />N:\1 Foothill\Area2A-2013-15\Design\Arealoverrill\JMoody01-FillOverExistFootprint-R4.doc <br />Enclosures <br />c: Martin Hartzell, RWQCB Permitting Section <br />William Bratton, RWQCB Permitting Section <br />Todd Del Frate, RWQCB Enforcement Section <br />Sangeeta Lewis, GeoSyntec Consultants <br />Robert McClellon', Environmental Health Department <br />Jim Stone, Deputy Director/Operations <br />Desi Reno, Integrated Waste Manager <br />LA 31610 <br />