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Gary A. Reents 2 14 April 1989 <br /> feasible and that the system will be installed, then the letter report <br /> documenting this decision should include a Closure and Post-Closure <br /> Maintenance Plan, for the waste ponds, pursuant to Subchapter 15. <br /> The Site Characterization Report and Appendix was reviewed to determine <br /> its compliance with the technical requirements specified in the Cleanup <br /> and Abatement Order (No. 89-707) issued to Southwest Hide Company on 10 <br /> March 1989 . The Cleanup and Abatement Order required that all existing <br /> information be presented in a coherent manner within three categories; <br /> Pollutant Source Identification and Delineation, Hydrogeological <br /> Characteristics, and Plume Delineation. The Order also required that <br /> all data gaps be identified, that the rationale for all decisions be <br /> provided, and that work plans to fill in the data gaps (including time <br /> lines) be provided. <br /> In general , the Site Characterization Report contained the information <br /> listed in the Cleanup and Abatement Order's Technical Report <br /> requirements. However, there were some deficiencies, as stated below. <br /> These deficiencies should be addressed. <br /> Pollutant Source Identification and Delineation <br /> The discussion on soil contamination contained in Section 6. 2 Soil (page <br /> vI-9) is deficient. The areal and vertical extent of this soil <br /> contamination is not discussed. In addition, Figure 6. 2a should include <br /> a delineation of the extent of the soil contamination, and the location <br /> an oned <br /> of the suspected sources (the ableach field and the wash rack) <br /> in this area. If data gaps exist, then a soil sampling work plan to <br /> delineate the areal and vertical extent of soil contamination in this <br /> area should be developed and implemented. ) <br /> The previous site occupants' potential sources of salt pollution are <br /> discussed in Chapter 2 of the report, but there are no plans to <br /> investigate these potential sources. In addition, Southwest Hide <br /> Company's previously uncovered salt storage pad is referred to, but no <br /> plans to investigate soil contamination from runoff from this pad is <br /> proposed. If these areas are potentially significant sources of soil <br /> contamination then a soil sampling work plan to delineate the extent of <br /> soil contamination should be developed and implemented. <br /> Section 2 . 3 (page II-1) discusses Southwest Hide Company's intention to <br /> investigate their current salt processing system for leaks. The results <br /> of this investigation should be submitted to this office for review. <br /> Hydrogeologic Characteristics <br /> The presentation of the site's underlying hydrogeological <br /> characteristics, based on the existing data, complies with the <br /> requirements specified in the Cleanup and Abatement Order. The soil <br />