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Sent by: DRB 6122919313; 05/12/97 19:00; Jet,ax #243;Page 10/39
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<br />(07) VOC Remediation Feasibility Study. In accordance with MPCA {~o,~espondoacc
<br />daied Febr~,a, >' ~-,, 1 ,,-,,,;~s~,,,,,,~s ,,,,~ ~ ermit. Part III.C..] Corrective Action
<br />t,,,,'~,,s,~,na,, v,~v~,,,j, the Landfill will be allowed a three year timeframe in which to
<br />demonstrate the effectiveness of landfill gas extraction system in reducing VOC
<br />contaminants in the groundwater.
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<br />If, as of March 1, 1999, groundwater quality standards are exceeded at the facility's
<br />compliance boundary and the concentration of VOCs do not show a decreasing trend, the
<br />Landfill shall complete a Focused Feasibility Study. The Focused Feasibility Study shall
<br />be submitted to City staff'by June I, 1999.
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<br />(08) VOC- Remedial Action. If necessary, the selected remedial measure for VOC
<br />contaminants identified by the Feasibility Study must bc constructed and operational by
<br />March 1, :2001, unless good cause can bc shown for a delay.
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<br />(09) I-I~aw Metal Comaminant Monitoring and Assessment_ .Heavy metal contaminants
<br />for surface water and groundwater must be addressed in addition to VOC contaminants.
<br />Based on the need for additional monitoring { h-, 199,5 aiid 1996 ) to confirm exceedances
<br />and identify trends, the Landfill shall {c~,ad~c~ } [c0ntinuel monitoring ~ and
<br />O996-mm~ prepare ~'aa,}, evaluation -{repm~ [r¢oortsl which shall be submitted with the
<br />· [q996~ MPCA Annual ~¢-Repor~ I'Renorts~l.
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<br />(10) Heaw Metal Contamination Feasibility Study. If heavy metal concentrations in
<br />groundwater and surface water exceed regulatory standards, the Landfill will be required
<br />to conduct a Feasibility Study and submit it to City staff' {by M,~ I, '~"'~,=,,t [on a schedule
<br />determined.....by City staffi.
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<br />(11) Construction Oualitv Assurance Reports. A Construction Quality Assurance
<br />(CQA) Report shall be submitted to the City prior to the placement of waste on newly
<br />constructed lined areas. A CQA report shall also be submitted for Land£dl areas which
<br />receive final cover. The report shall demonstrate that the work is completed to the plan
<br />specifications. The Report shall be certified to by an engineer registered in the State of
<br />Minnesota and shall include but not be limited to:
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<br />(a) All relevant construction specifications;
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<br />(b) All shop drawings for prefabricated components;
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<br />(c) Photo documentation of all critical aspects of construction;
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<br />(d) Deflection testin8 results for leachate collection and transmission pipes;
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<br />(e)
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<br />Narrative description of all as-built variances dom the plans and/or
<br />specifications;
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<br />909576.3 9.
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