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Table 1 . South Gifford Road Landfill Proposed Semi-Annual Groundwater Monitoring Network <br /> Well Total Well Screened Top of Casing Analyses Proposed <br /> Well Name Diameter Depth Interval Elevation Sampling Rationale EPA MPIS <br /> (in) (ft, BLS) (ft, BLS) (ft, NGVD) Z <br /> 82601 NA Lista <br /> GR-MW30CC 2 85 75 - 85 NA Monitor groundwater just above confining layer where DPT ✓ <br /> showed high cDCE concentrations . <br /> GR-MW30VE 2 [:120 110 - 120 NA Monitor groundwater vertically beneath the plume, currently ✓ <br /> free of CVOCs . <br /> Notes : <br /> 1 . EPA 8260 = Environmental Protection Agency Method 8260 ; Volatile Organic Compounds including Trichloroethene (TCE), Cis- 1 ,2-Dichloroethene <br /> (cDCE), trans- <br /> 1 ,2-Dichloroethene (tDCE), and Vinyl Chloride (VC) . <br /> 2 . NA = Natural Attenuation (dissolved gases include ethene, ethane, and methane) . <br /> 3 . Monitoring Plan Implementation Schedule (MPIS) List = Volatile Organic Compounds (VOCs), chloride, total dissolved solids (TDS) , <br /> phenols , lead, iron . <br /> 4 . In addition to the listed laboratory analyses, all sampled wells will be field-screened for pH , turbidity, dissolved oxygen, specific <br /> conductance, and temperature . <br /> 5 . Shaded cells indicate proposed well installation locations . <br /> 6 . CVOC = Chlorinated Volatile Organic Compounds . <br /> 7 . BLS = Below Land Surface. <br /> 8 . NGVD = National Geodetic Vertical Datum . <br /> XR05010 IRC MPIS-PM Sampling\R050001J-Table.xls Page 6 of 6 <br />