COMPLIANCE INFO_1993-1994 - Laserfiche WebLink

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Mr. Mike Niblock January 7, 1993 Page 3 Direct and indirect significant effects of the project upon the environment shall be clearly identified and described, giving due consideration to both the short- term and long-term effects . The following is a list of some of the concerns of CIWMB staff that were either not included or not fully described in the DEIR which should be addressed in the Final Environmental Impact Report (FEIR) : What is the proposed implementation schedule for all activities? Mitigation Measure L. 5 indicates that the landfill would continue to ban tires . However, the governing SWFP allows the acceptance of tires . Does the project proponent plan to no longer accept tires at the facility? The DEIR indicates that an average of about 1, 160 cubic yards per day of waste will be accepted. What are the peak daily tonnages/volumes proposed for this project? Page II . 8 of the DEIR states, "Some of the materials would be stockpiled on top of the existing landfill after it is properly closed. These stockpiles would preload the existing landfill and maximize settlement prior to construction of the vertical expansion. It is also anticipated that preloading the landfill would squeeze out the leachate being collected by a leachate remediation system for the existing landfill . " The DEIR indicates that chlorinated hydrocarbons have been detected at concentrations greater than established maximum contaminant levels . CIWMB staff are concerned that preloading the existing landfill to maximize settlement will exacerbate contamination beneath the landfill . Staff request that the CIWMB be informed of any changes in the groundwater remediation program of the approved Corrective Action Plan. Board staff express concern with the vertical expansion of the landfill over an existing cell which has been identified as the source of groundwater contamination beneath the site. The proposed leachate collection and recovery system will assist in mitigating this impact, yet it may not completely address the mitigation necessary for the contamination. Specifically, the proposed vertical expansion of the landfill may create cumulative impacts and exacerbate any existing groundwater impact by increasing overburden pressure and possibly increase leachate and landfill gas production at the site .