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Show MAGNA RAILROAD SLOPE M0l POST REMOVAL AND POST RECLAMATION SAMPLING ADDENDUM INTRODUCTION The Magna Railroad Slope Site is located immediately south of Bravo Gate and north of the Ore Haulage Railroad tracks. The Site consists of a steep north facing slope formed from the dumping of slag, tailings, iron and copper stained gravels, and debris. The Site was investigated in 1995 for metals contamination and t\vo areas within the Site, that contained elevated concentrations of arsenic and( or) lead, were defined. The contaminated soil will be removed and samples will be collected to document the total and leachable (Synthetic Precipitation Leaching Procedure (SPLP)) metals content of the post removal surface. After removal, fill soil will be hauled to the Site as part of the regrading plan that will consist of reducing the slope and constructing terraces to control erosion. After reclamation, samples will be collected to document the metals content of the post reclamation surface. This addendum to the Sampling and Analysis Plan describes the specific sampling plan for post removal, post reclamation and fill soil sampling. LOCATION AND DESCRIPTION The Magna Railroad Slope Site is located immediately south of Bravo Gate and north of the Ore Haulage Railroad tracks (Dwg. No. 507-T-0173). The Site consists ofa steep slope formed from the dumping of slag, tailings, iron and copper stained gravels, and debris. The Site is 1450 feet long by 100 to 150 feet wide at the west end and 50 to 100 feet at the east end. Formerly an employee parking area was located between the base of the slope and Bravo Gate and a paved walkway from the parking area traversed up the slope through the Site to the Magna Rail Car Shop Building located at the top of the slope. The parking area was relocated to the east end of the Site, closer to the top of the slope. and the walkway was eliminated entirely. Contaminated soil was defined in two separate areas within the Site, one irregularly shaped area located at the east end covering approximately 43,400 square feet and the other area located at the west end covering an area of 21,000 square feet. After removal, fill soil will be hauled to the Site to provide enough material to reduce the slope and construct two terraced benches that extend through the Site from east to west to aid in controlling erosion. SAMPLE COLLECTION . . The steep topography and close proximity to operational facilities will control removal acti\·ities. Small are4s of contaminated soil will be removed, sampled and backfilled since removal may create unstable slope conditions or compromise the integrity of the Ore Hau lage railroad trncks MO l padde.wpd* June 10, 1997 Rev. 0 |
