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. .' 200809097 A7TAC8MEIIT A 1m US Army USACE of Engineers Omaha District To: CENWQ.PM-H, AMn M Kam From: CENWQ.ED-GI, James J. Mars II Sub); 5X oortlficotlon for IJxamplBd arllilllln Load Lines 1 and 2 Ref; CQRNHUSKER ARMY AMMUNITION PLANT, GRAND ISLAND, NEBRASKA ACM Removal at Load Lir'les 1 and 2 Contract: W9128F~04-OO0 1, 00.0008 Date: Wednesday, January 1dh. 2007 5X certification for exemolBd areas in Load Linell1 and 2: The previously exempted areas of Load line 1 and 2 auoclated with possible presence of burled debris (ACM and OMM) malariall. Bre considered 5X certified with the following applicable statement "This CfjrtffiH that the material fisted has been 100 peroent property Inspected and 10 the besl of our knowledge and belief Is free of explosive hezrmls, engine Rulds, Illuminating dials. and other visible liquid HTRW maleria/s.' as required by the 000 Explosive Safely 800lr(1. t:IWmY.A Thermal decomposition, demolition, and 5X certification for Load lines 1 and 2, was completed by MKM Engineers, Inc. (MKM) ootween 2000 and 2005 with the exception of two areas in Load Line 1 and one area in Load Line 2 due to the possible presence of ACM materials which prevented excavation, invesllgation and verification of thasa areas since It was not part of their contract. During the period of JUne through August 2006, URS Group, Inc. (URS) of Omaha, Nebraska, under contract to Omaha District US Army Corps of Engineers (USACE), investigated end 8ltCSVated these areas. The goal of the project was the removal and disposition of the ACM material and !he verfficatton that the removed materlal and DXcavatad areas were free of Material Potentially Presenting an Explosive Hazard (MPPEH), ~: Total of three areas was excavated to e depth of no less then 4 feet bg. All BltCavated material was visually Inspected using a modified shaker process for the presences of explOSives or munitions (e.g.. munitions containers and packaging material; munitions debris remaining after munitions use, demlmarizatlon, or dispose I; and range-related debris); or material potentially containing e high enough concentration of explosives such that the material presents an explosiVe hazard (e.g., equipment, drainage systems, holding tanks, piping, or ventilation ducts that were associated with munitions production, demUllarizallon or disposal operations), Additionally, all material excavated and Ihe walls and noor of the excavatton was analytically sampled for the presents of Munitions Constituents (Me) In accordance w1lh a USACE approved Sampling Plan. All phases of the InspectiOn and sampling was In accordance with the USACE approved Work Plan and verified by Ihe Quality Assurance inspectlons by a on site USACE Ordnance and Explosive Safely Specialist FindJnas: Reaults of the visual Inspections and analytically sampling were all No Finds for Munitions and Explosives of Concern (MEC). ~',L-- ja . J. Mars II C . Q-ED-GI Ordnance and Explosive Salely Specialist