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' Banks and Gesso, LLC <br />Current data indicates two small areas with soils exceeding this standard. <br />The contamination exists from one to four feet below ground surface and <br />' the volume is estimated at less than ten tons. This data is subject to <br />revision pendinct the results of additional testing. <br />' Soils containing toxaphene concentrations equal to or less than 40 mg/kg <br /> but greater than 0.40 mg/kg will be considered as solid waste and will be <br /> disposed of on-site, in the gravel mine, as part of reclamation backfill. <br />' These soils will be placed above the ground water level. Solid waste <br /> generated at a mine site and disposed of at that mine site can be <br /> permitted by the DMG without a Certificate of Designation. (CD) This is <br />allowed pursuant to a Memorandum of Agreement between the DMG and <br /> CDPHE and by the fact that a landowner is allowed to dispose of their own <br /> solid waste on their own property (same property) without a CD under the <br /> Colorado Solid Waste Disposal Sites and Facilities Act. <br />' Soils containing toxaphene concentrations of 0.40 mg/kg or less require <br />no special handling. <br />' 5.2 Map of Areas to Be Remediated <br /> Figure 2 is a map of areas to be remediated based on available data. <br />' Also shown is the proposed storage and staging area. <br /> 5.3 Sampling Program <br />1 <br /> The floor and walls of the excavated area will be sampled and analyzed <br /> for organochlorine pesticides (EPA Method 8081 A). The Sample <br />' intervals shall be: as follows: <br /> Floor of excavation - 1 sample per 50-feetz <br />' Walls of excavation - 1 sample per 10 lineal feet (each wall) <br /> The sampling methodology shall be the same as described in Appendix 3. <br />' <br /> Sampling will continue in the excavated area until the unrestricted use <br /> standard (i.e. 0.40 mg/kg or less) is met. Soils within the solid waste <br />' range of contaminant concentrations will be removed and hauled for on- <br /> site in-pit placement. <br />' 5.4 Schedule of Remediation <br />' ASCI proposes to start the remedial work immediately upon receiving all <br />necessary permits to use the property as planned. The remedial work <br />shall be completed no later than five years from that date. ASCI desires to <br />1 <br />Asphalt Specialties Co., Inc. -Pesticide 6 991M6.WD <br />' Voluntary Clean Up Plan Application July 2000 <br />