FINAL SITE INSPECTION REPORT

11181119112011211122112311241125112611271128112911301131113211331134113511361137113811391140114111421143114411451146114711481149115011511152contained a burster and fuze and a charge of red iron ore (hematite) that was used as a marker.The M75/M84 target marker bombs contained sensitive fuzing.Large amounts of debris from these munitions were observed during the ASR site visit in 1997.This AOC was the only area where the ASR team observed relatively intact, fuzed, andsuspected live munitions (M75/M84 practice bomb) during the 1997 site visit.6.3.1 Field Observations and Historical Evidence of MECAs agreed to at the TPP meeting, no visual reconnaissance was completed at the Carty ReservoirBomb Target, because sufficient historical evidence of MEC and munitions debris present at thisAOC. A visual reconnaissance was completed at Target No. 1 located immediately north. Thenorthern portion of the Carty Reservoir Bomb Target safety circle overlaps the reconnaissanceroute completed on Target No. 1, on a portion of property. The route is shown on Figure 4-1.6.3.2 MEC Risk AssessmentThe following section presents a qualitative assessment of the risk associated with potentialMEC, as based on historical documentation, prior investigation, and visual inspection conductedduring this SI. A MEC assessment is provided to convey relative risk on a scale from low tohigh and is not intended to be a thorough risk assessment as would be conducted for an RI/FS.Access to portions of Carty Reservoir Bomb Target is restricted by locked gates and fences.Access is available only by escort by PGE management or The Nature Conservancy. Otherportions of the AOC are used for irrigated agriculture and access is not controlled.Munitions used at Carty Reservoir Bomb Target were primarily practice rounds including AN-Mk23 and M38A2 practice bombs. The M75/M84 target identification bombs may havecontained sensitive fuzing. The potential for MEC at the Carty Reservoir Bomb Target ismoderate. This is based on the following: MEC was reported during the 1995 visual site inspection conducted as part of the ASR; The M75/M84 target marker bombs may have contained sensitive fuzing; The unfenced area is used for farming, undergoing yearly tillage to depths ofapproximately 18 inches.The area is frequented by farm workers; the general public does not have routine access to theAOC.6.4 Munitions Constituents EvaluationBased on historical information and reports of MEC and MD in the ASR, munitions used atCarty Reservoir Bomb Target were practice munitions. Potential MC include metals associatedwith sheet metal, cast iron, paint, and other components of munitions (iron and lead).Chromium, copper, molybdenum, and nickel were included as potential metal MC during theTPP planning, although no identified source is known at the Carty Reservoir AOC. The onlyBoardman AFR Final SI Report.doc 6-2 Contract No. W912DY-04-D-0010 Delivery Order No. 003September 2007