FINAL SITE INSPECTION REPORT

9335.0 Target No. 29349359369379389399409419429439449459469479489499509519529539549559569579589599609619629639649659665.1 History and Land UseThe Target No. 2 AOC consists of a single target configured with concentric circles in 200- and400-yard radii. In addition, there were three scoring towers 120 degrees apart near the target.This range was previously assessed during the PA/SI (Weston, 2004). The target name isconsistent with the ASR Supplement. Figure 3-1 shows the general location of the Target No. 2and Figure 5-1 shows the location with respect to the current land use in the vicinity of the target.Figure 5-2 is a historical aerial photograph showing the concentric circles of the target center.Note that the AOC boundary, obtained from the ASR Supplement (USACE, 2004b and the 2006ARC (DoD, 2006) is not centered on the target center.The Target No. 2 AOC is located on agricultural property owned by Threemile Canyon Farms.The area is currently used for irrigated farming. No groundwater wells are located within theboundary of Target No 2 AOC. The nearest surface water is Sixmile Canyon Creek locatedapproximately 1,800 ft west of the southwest boundary of the AOC. The future land use is notexpected to change from the present use. The target was used between 1942 and 1960 forpractice bombing. As discussed in Section 2.4.8, Target No. 2 is used entirely for agriculturalpurposes and does not contain any sensitive environments and does not fit the definition of anIEP.5.2 Previous InvestigationsThe ASR evaluated Target Area No. 2. The team encountered MD up to 325 yards from thetarget center. Items observed by the ASR team included M38A2 practice bombs, AN-M52 andAN-M50A2 incendiary bombs, and Mk 6 2.25-inch practice rockets.The PA/SI collected two surface soil samples (0 to 0.5 ft bgs) and two subsurface soil samples(0.5 to 2.0 ft bgs) from a location north of the target area (Figure 5-2). Samples were analyzedfor metals and perchlorate. As previously indicated, the PA/SI also sampled surface andgroundwater in and around the Boardman AFR for perchlorate.5.3 MEC EvaluationLikely range munitions used at this AOC are listed as AN-M50 incendiary bombs, M38A2practice bombs and Mk 6 2.25-inch practice rockets. Recent MEC finds at Target No. 2 includedAN-M57 GP practice bomb. MD from AN-47, and Mk-15 Mod 3 100 lb practice bombs hasalso been reported (Weston, 2004). The AN-M50 and AN-M52 incendiary bombs were cased ina magnesium shell and contained a fuze and thermite. Thermite consists of a mixture ofpowdered aluminum metal and ferric oxide. The M38A2 practice bombs were a sand-filled,sheet metal cased, 100-lb practice bomb and contained a black powder spotting charge. TheBoardman AFR Final SI Report.doc 5-1 Contract No. W912DY-04-D-0010 Delivery Order No. 003September 2007