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Sent by: DOHERTY RUMBLE BUTLER 612 291 9313; 04/17/97 3:03PM;Jex #563;Page 28/39 • gas monitoring{. IncoLl,oratL} [and incorpotAl the evaluation in the MPCA Annual Report for the landfill. (07) VOC Remediation Feasibility Study. In accordance with MPCA {Lo,��t,ond�n iiatL.d 1-,biraiy-14, 1994 re64rda th,) (permit. Part III C..1 Corrective Action{lilv,stirdivn Rcport}, the Landfill will be allowed a three year timeframe in which to demonstrate the effectiveness of landfill gas extraction system in reducing VOC contaminants in the groundwater. If, as of March 1, 1999, groundwater quality standards are exceeded at the facility's compliance boundary and the concentration of VOCs do not show a decreasing trend, the Landfill shall complete a Focused Feasibility Study. The Focused Feasibility Study shall be submitted to City staff by June 1, 1999. (08) VOC Remedial Action. If necessary, the selected remedial measure for VOC contaminants identified by the Feasibility Study must be constructed and operational by March 1, 2001, unless good cause can be shown for a delay. (09) Heavy Metal Contaminant Monitoring and Assessment. Heavy metal contaminants for surface water and groundwater must be addressed in addition to VOC contaminants. Based on the need for additional monitoring {in 1995 and-1996' to 411/ confirm exceedances and identify trends, the Landfill shall {conduct} [continue) monitoring {in 1995) and 11996 and}prepare {art}- evaluation fi,trolt} [repornsl which shall be submitted with the 996} MPCA Annual {Report} 'Reports). (10) . - . u - •f : . • .c'•' ' � . If heavy metal concentrations in groundwater and surface water exceed regulatory standards, the Landfill will be required to conduct a Feasibility Study and submit it to City staff tby May 1, 1997) [on. . schedule determined by City staff'. (11) Construction Quality Assurance Reports. A Construction Quality Assurance (CQA) Report shall be submitted to the City prior to the placement of waste on newly constructed lined areas. A CQA report shall also be submitted for Landfill areas which receive final cover. The report shall demonstrate that the work is completed to the plan specifications. The Report shall be certified to by an engineer registered in the State of Minnesota and shall include but not be limited to: (a) All relevant construction specifications; (b) All shop drawings for prefabricated components; (c) Photo documentation of all critical aspects of construction; • (d) Deflection testing results for leachate collection and transmission pipes; 909S7o.2 9.