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Mr. Robert McClellan <br /> December 8, 2008 <br /> Page 4 <br /> compliance with these revised regulations. AWI understands the CIWMB has recently approved <br /> an extension for full compliance with the revised regulations until September 21, 2009. Upon <br /> approval of the work plan provided herein, AWI intends to complete the proposed upgrades with <br /> this timeframe. <br /> Section 20923—Monitoring <br /> This section of the regulation was modified to incorporate the disposal site facility boundary as a <br /> point of compliance(as opposed to landfill property boundary) and included a provision to <br /> consider the hydraulic conditions surrounding the disposal site when designing a monitoring <br /> network. <br /> Forward's monitoring network complies with the requirements set forth in section 20923. <br /> Section 20925—Perimeter Monitoring Network <br /> Spacing Requirements—20925O <br /> This section of the regulation was modified to ensure that wells are installed near the permitted <br /> facility boundary(as opposed to the property boundary)of a site and reinforces the 1,000-foot <br /> spacing rule that was in the previous version of the regulations. <br /> The current distance between the wells are within the 1,000-spacing limitation set forth in the <br /> regulation,with the exception of four intervals indicated as marginal in the attached Table 1. <br /> The distances of these intervals range from approximately 1,000 feet to 1,010 feet. <br /> Well Depth Requirements—20925(c) <br /> This section was modified to stipulate that wells shall be installed to the maximum depth of the <br /> waste at the site,as opposed to the previous requirements to install probes to the maximum depth <br /> of waste within 1,000 of the proposed probe location. Table 1 contains a summary of the depths <br /> of the existing and planned monitoring wells at Forward. <br /> The well depths at Forward comply with depth requirements set forth in the regulation. All wells <br /> were installed with shallow,mid,and deep probe sections, as required by Section 20925(c). A <br /> table with construction data for all existing probes is provided as an attachment. <br />