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%,00lg% California Regional Water Quality fontrol Board - <br /> Central Valley Region <br /> Steven T.Butler Chair <br /> Winston H.Hickoxm <br /> - Gray Davis <br /> secretaryjor Sacramento Main Office Ute ► `RR Qm Governor <br /> Environmental lntemet Address: http://%t,\%w.swrcb.ca.gov/—rwgcb5 17 <br /> Protection 3443 Routicr Road,Suite A,Sacramento,California 95827-3003 <br /> Phone(91 G)255-3000•FAX(91 G)255-3015 <br /> 17 March 2000 <br /> Mr. Kevin Basso <br /> General Manager <br /> Forward Inc. <br /> 1145 West Charger Way <br /> Stockton, CA 95206 <br /> REVIEW OF WASTE MANAGEMENT UNIT B PARTIAL FINAL CLOSURE AND POST- <br /> CLOSURE MAINTENANCE PLANFOR FORWARD LANDFILL, SAN JOAQUIN COUNTY <br /> (Case No. 2209) <br /> We have reviewed the Partial Final Closure and Post-Closure Maintenance Plan submitted by <br /> GeoSyntec Consultants, Inc. on behalf of Forward Landfill. The plan proposes Partial Final Closure of <br /> Waste Management Unit B (WMU B) and request approval to postpone the construction of the final <br /> cover for 5-years to allow for landfill settlement. <br /> We have the following concerns and comments: <br /> 1. The plan does not include the design for the temporary drainage control system for the 5-year <br /> settlement period. <br /> 2. The construction quality assurance (CQA) officer is not specified in the CQA plan. The <br /> relationship between the CQA officer, construction manager, construction crew/contractor, <br /> design engineer, and landfill owner should be specified to ensure no conflict of interest between <br /> the construction crew/contractor, design engineer and CQA officer. This is especially important <br /> as Forward will be doing some construction in house. <br /> 3. The Minutes of the Weekly Progress Meetings should be submitted weekly by FAX to RWQCB <br /> staff. <br /> 4. The intermediate cover(later foundation layer) should be compacted to 90% compaction prior to <br /> the 5-year settlement period. <br /> 5. Table 2-10, results from the last gas sampling round, is missing from my copy of the report. <br /> 6. The facility does not currently have a landfill gas collection and control system and your <br /> consultant, SCS Engineers has determined that such a system is not necessary under the <br /> regulations of the San Joaquin Valley Unified Air Pollution Control District and Title 27. It <br /> should be noted that these regulations are concerned with air pollution and explosive gas <br /> respectively and not with groundwater contamination. Forward Landfill has a history of <br /> intermittent, low level VOC impacts to groundwater. In recent monitoring reports, Kleinfelder, <br /> your groundwater monitoring consultant has attributed these impacts to landfill gas. In light of <br /> these VOC impacts and the reasonable expectation that closing WMU B will increase downward <br /> migration of landfill gas to groundwater, we recommend that Forward re-evaluate the need to <br /> California Environmental Protection Agency <br /> ca Recycled Paper <br />