FINAL SITE INSPECTION REPORT

167116721673167416751676167716781679168016811682168316841685168616871688168916901691169216931694169516961697169816991700170117021703170417051706 All munitions contained relatively insensitive explosive components except for the AN-M57 which may have had a sensitive fuze; The area is used for farming, undergoing yearly tillage to depths of approximately 18inches and MEC is periodically unearthed; The unfenced area is frequented by farm workers; the general public does not haveroutine access to the AOC.Two surface soil samples were collected during the SI field activities and analyzed for selectmetals and explosives. In addition, two surface soil samples and two subsurface soil sampleswere collected from this AOC during the PA/SI (Weston, 2004). The PA/SI samples wereanalyzed for metals and perchlorate. Analytical results for metals for all soil samples werebelow Boardman AFR background values. There were no explosive or perchlorate detections.No surface water or sediment samples were collected during the SI field activities at Target No.2. Five surface water samples and one sediment sample were collected during the PA/SI fromlocations located west of the Target No. 2. The surface water samples were analyzed forperchlorate and the sediment sample was analyzed for metals. Perchlorate was detected in allsurface water samples. All concentrations were below the DoD action level and below availableecological screening values. The highest perchlorate concentration was in the most upstreamsample and the lowest was in the most downstream sample. The most upstream sample locationis upstream of all FUDS AOCs. These results indicate that the source of perchlorate in SixmileCanyon Creek is not from FUDS related activity. The metals analytical results from thesediment sample were below background concentration.10.3 Carty Reservoir Bomb TargetNo MEC or MD was observed during the SI field activities. During the ASR field visit, largeamounts of MD were observed as well as relatively intact, fuzed and suspected live munitions.The risk for potential MEC at Carty Reservoir Bomb Target is considered to be moderate basedon the following: MEC was reported during the ASR in 1995; The M75/M84 target marker bombs may have contained sensitive fuzing; The area is used for farming, undergoing yearly tillage to depths of approximately 18inches; The unfenced area is frequented by farm workers; the general public does not haveroutine access to the AOC.Two surface soil samples were collected during the SI field activities and analyzed for selectmetals. One of the two samples was also analyzed for explosives. Metal analytical results wereall below Boardman AFR background values. There were no explosives detections. Onesediment sample was collected during the SI field activities and analyzed for select metals andBoardman AFR Final SI Report.doc 10-3 Contract No. W912DY-04-D-0010 Delivery Order No. 003September 2007