SECTION 13 BLACKTOP TRAINING AREA [511(7)] AND FENCED YARD IN BLACKTOP AREA [512(7)]

Transcription

1 SECTION 13 BLACKTOP TRAINING AREA [511(7)] AND FENCED YARD IN BLACKTOP AREA [512(7)] 13.1 SITE DESCRIPTION The Blacktop Training Area is herein addressed along with the Fenced Yard in the Blacktop Area as identified in the ASR (USACE, 1999). The area is a large 3-acre asphalt area along the east side of Reggie Avenue (formerly 12th Avenue) with viewing stands on both ends of the area (Figure 2.2). At one time, the blacktop area contained a fenced yard (Figure 13.1). The fence was removed at some unknown date but parts of the fence posts remain The Blacktop Training Area was identified on the 1956 map of the Chemical Corps Training Areas and the 1969 Chemical School Orientation Map. Various demonstrations may have taken place here, such as decontamination training, but the exact use is unknown (USACE, 1999). The area was reportedly used for training in the use of flamethrowers, decontamination equipment and smoke generators. The yard once enclosed by the high fence may have been used to store agent or for toxic agent training; however, as noted below, the yard may be a more recent feature PREVIOUS INVESTIGATIONS The analysis of historical aerial photographs shows that the area was cleared in the early 1940s and paved sometime after the 1954 aerial photograph was taken. Once the area was paved, very few changes occurred that are visible in the aerial photographs. One change that did occur is that the fenced area on the western edge of the pavement first shows up in the 1982 aerial photograph The site visits have shown that the features located at the north and south ends of the paved area are bleachers, suggesting that training demonstrations took place here. It is not known what purpose the small fenced area served RESULTS OF INVESTIGATION Soil Sampling No sampling has been conducted at this site in the past. During this investigation, only soil sampling and analysis (and associated continuous air monitoring) was conducted. Eighteen hand auger borings were advanced below the blacktop to collect soil samples. During the hand augering, continuous air monitoring was done using the MINICAMS, OPFTIR, and PID. The locations, shown on Figure 13.1, were randomly 13-1 I:\COE-HUNT\MCLEECA\_EECA\SECTIONS\SECTION13.DOC 6/18/02

2 located over the site. Soil samples were collected from each boring at 0.5 to 1 foot and 3.5 to 4 feet below ground surface. The samples were screened for GB and HD agents by ECBC prior to Parsons shipping the samples to ECBC s laboratory. The samples were analyzed for GB and HD. No concentrations were detected above the reporting limits. The analytical results are summarized in Table The laboratory analytical data are presented in Appendix B. Photo 13.1: Blacktop Training Area 13.4 DESCRIPTION OF HAZARDS OF SPECIFIC CWM ENCOUNTERED Historical documents do not indicate the use of specific CWM at this site. Decontamination training may have taken place; whether such activities actually occurred or used live agent is not known. The fenced area may have been used for storage or demonstrations of agent; no documented evidence of such use has been found. Training involving flame and smoke agents has also been reported for this site; however, these activities are no longer considered CWM-related I:\COE-HUNT\MCLEECA\_EECA\SECTIONS\SECTION13.DOC 6/18/02

3 Date ID GB HD 6/6/01 BT-SB1-1-6"-1' <20 <200 6/6/01 BT-SB '-4' <20 <200 6/6/01 BT-SB2-1-6"-1.0' <20 <200 6/6/01 BT-SB '-4.0' <20 <200 6/6/01 BT-SB3-1-6"-1.0' <20 <200 6/6/01 BT-SB '-4.0' <20 <200 6/6/01 BT-SB4-1-6"-1.0' <20 <200 6/6/01 BT-SB '-4.0' <20 <200 6/6/01 BT-SB5-1-6"-1.0' <20 <200 6/6/01 BT-SB '-4.0' <20 <200 6/6/01 BT-SB6-1-6"-1.0' <20 <200 6/6/01 BT-SB '-4.0' <20 <200 6/6/01 BT-SB7-1-6"-1.0' <20 <200 6/6/01 BT-SB '-4.0' <20 <200 6/6/01 BT-SB8-1-6"-1' <20 <200 6/6/01 BT-SB '-4.0' <20 <200 6/5/01 BT-SB9-1-6"-1' <20 <200 6/5/01 BT-SB '-4.0' <20 <200 6/5/01 BT-SB10-1-6"-1' <20 <200 6/5/01 BT-SB '-4.0' <20 <200 6/5/01 BT-SB11-1-6"-1' <20 <200 6/5/01 BT-SB '-4.0' <20 <200 6/5/01 BT-SB12-1-6"-1' <20 <200 6/5/01 BT-SB '-4.0' <20 <200 6/5/01 BT-SB13-1-6"-1' <20 <200 6/5/01 BT-SB '-4.0' <20 <200 6/5/01 BT-SB14-1-6"-1' <20 <200 6/5/01 BT-SB '-4.0' <20 <200 6/5/01 BT-SB15-1-6"-1' <20 <200 6/5/01 BT-SB '-4.0' <20 <200 6/6/01 BT-SB16-1-6"-1.0' <20 <200 6/6/01 BT-SB '-4.0' <20 <200 6/6/01 BT-SB17-1-6"-1.0' <20 <200 6/6/01 BT-SB '-4.0' <20 <200 6/5/01 BT-SB18-1-6"-1' <20 <200 6/5/01 BT-SB '-4.0' <20 <200 units = µg/g Table 13.1 Soil Analytical Summary Blacktop Training Area Fort McClellan, Alabama I:\COE-HUNT\MCLEECA\_EECA\ SECTIONS\Tbls-2.xlsBlacktop /18/02

4 13.5 QUALITATIVE RISK EVALUATION No documented historical evidence exists that CWM was used at this site. The chemicals used for flamethrower and smoke training are not considered chemical agents. Based on soil analytical results collected during this investigation, it can be inferred that no residual agents or degradation products exist in the sampled media. Based on the historical records it can also be inferred there are no sources of CWM in the environment at the Blacktop Training Area and the Fenced Yard, and therefore the probability of current and future risk of human exposure to chemical agents is very unlikely RECOMMENDED CWM RESPONSE ACTION ALTERNATIVE Although the Blacktop Training Area/Fenced Area may have been used for CWM training, no documented evidence of such use has been uncovered. No contamination by chemical agent was found during this investigation. Thus, it can be inferred that current and future human health risks due to exposure to CWM at this site are very unlikely. The NFA response alternative achieves response action goal of minimizing the public s exposure to CWM. The NFA response alternative is effective, implementable, and has no cost. Therefore, the NFA alternative is recommended as the CWM response alternative for implementation at the Blacktop Training Area/Fenced Area. In addition, any warning signs for CWM previously posted as precautionary measures should be removed I:\COE-HUNT\MCLEECA\_EECA\SECTIONS\SECTION13.DOC 6/18/02

5 Justice Avenue (Formerly 11th Avenue) BT-SB BT-SB BT-SB-2 BT-SB-1 BT-SB-18 BT-SB-11 Former Fenced Area BT-SB Reggie Avenue (Formerly 12th Avenue) BT-SB-3 BT-SB-5 BT-SB-6 BT-SB-12 BT-SB-8 BT-SB BT-SB-4 BT-SB-16 BT-SB-7 BT-SB-15 BT-SB Legend BT-SB Soil Boring & ID Road/Parking Feature Topographic Contour (5 ft Interval) Water Feature Blacktop Training Area Building & ID Blacktop Training Area [511(7)] CWM EE/CA Feet PARSONS ENGINEERING SCIENCE, INC. MAD DESIGNED BY: DRAWN BY: MAD CHECKED BY: JC/JU SUBMITTED BY: JC/JU SCALE: DATE: FILE: Figure 13.1 FORT McCLELLAN ANNISTON, ALABAMA CALHOUN COUNTY 1 inch equals 100 feet May 2002 x:\gis\734643\maps\ Eeca_maps(revised2)\ figure13_1.mxd U.S. ARMY CORPS OF ENGINEERS HUNTSVILLE CENTER PROJECT NUMBER: PAGE NUMBER:

6 SECTION 14 DOG TRAINING AREA [513(7)] 14.1 SITE DESCRIPTION The Dog Training Area is located at east of Reggie Avenue (formerly 12th Avenue), adjacent to an old gas chamber, which has been removed, and near the Dog Kennel Areas (Figure 2.2). The site was used for training dogs for the Military Police School. Remnants of the training obstacles were still in existence in September 1998, but have since been removed. A large, blistered and corroded concrete pad which was surrounded by a high fence is located within the area and may have been used to store agents or to conduct toxic agent training in Transfer Operations, since the Depot Area is across the road from this area (USACE, 1999) (Figure 14.1). Other training areas nearby include the T-5 Reaction Area, the D&I Area, and gas chambers. Photo 14.1 shows the concrete pad PREVIOUS INVESTIGATIONS The historical aerial photograph analysis revealed this area contained numerous buildings in the 1940s, and the concrete pad is one of many building foundations from that era. More recent aerial photos showed several cleared areas that were likely used for dog training, but no suspect CWM training areas A visit by Parsons in February 1999 showed the area was cleared of former dog training aids except for the concrete pad located at the site. This pad is heavily blistered and corroded, unlike other foundation pads in the vicinity INVESTIGATION RESULTS Soil Sampling During this investigation, only soil sampling and analysis was conducted. Two hand auger borings were advanced adjacent to the pad to collect soil samples for analysis (Figure 14.1). During the hand augering, continuous air monitoring was done using the MINICAMS, OPFTIR and PID. Soil samples were collected from each boring at 0.5 to 1 foot and 3.5 to 4 feet below ground surface. The samples were screened for GB and HD agents by ECBC prior to Parsons shipping the samples to ECBC s laboratory. The samples were analyzed for GB and HD. No concentrations were detected above the reporting limits. The analytical results are summarized in Table The laboratory analytical data are presented in Appendix B I:\COE-HUNT\MCLEECA\_EECA\SECTIONS\SECTION14.DOC 6/18/02

7 Table 14.1 Soil Analytical Summary Dog Training Area Fort McClellan, Alabama Date ID GB HD 6/5/01 DTA-SB1-1-6"-1' <20 <200 6/5/01 DTA-SB '-4.0' <20 <200 6/5/01 DTA-SB2-1-6"-1' <20 <200 6/5/01 DTA-SB '-4.0' <20 <200 units = µg/g I:\COE-HUNT\MCLEECA\_EECA\ SECTIONS\Tbls-2.xlsDog /18/02

8 Photo 14.1 Blistered Concrete Pad at Dog Training Area 14.4 DESCRIPTION OF HAZARDS OF SPECIFIC CWM ENCOUNTERED No CWM items were observed at this site during the intrusive investigation. Soil analytical results from representative locations indicate that no agent or degradation products are present QUALITATIVE RISK EVALUATION A fenced concrete pad at the site may have been used to store agents or to conduct training; however, no conclusive documentation to such uses was found. This site is near several other training areas, and reported uses may actually be references to those sites. No CWM was observed during the present investigation. In addition, soil analytical results for representative locations at this site indicate no chemical agents are present in the soils. Based on the historical records and the sampling conducted it is inferred there are no sources of CWM at the Dog Training Area, and therefore the probability of current and future risk of human exposure to chemical warfare agents is very unlikely I:\COE-HUNT\MCLEECA\_EECA\SECTIONS\SECTION14.DOC 6/18/02

9 14.6 RECOMMENDED CWM RESPONSE ACTION ALTERNATIVE The Dog Training Area was not likely used for chemical warfare training. No documented evidence of such use has been located. In addition, no soil contamination by chemical agent was found during this investigation. Thus it can be inferred that risks due to exposure to chemical agents at this site are very unlikely. The NFA response alternative achieves the response action goal of minimizing the public s exposure to CWM. Therefore, the NFA alternative is recommended as the CWM response alternative for implementation at the Dog Training Area. In addition, any warning signs for CWM previously posted as precautionary measures should be removed I:\COE-HUNT\MCLEECA\_EECA\SECTIONS\SECTION14.DOC 6/18/02

10 Rucker Street (Formerly 13th Avenue) DT-SB DT-SB Reggie Avenue (Formerly 12th Avenue) Foundation Dog Kennel Legend DT-SB-1 Soil Boring & ID Road/Parking Feature Topographic Contour (5ft Interval) Water Feature Dog Training Area 3172 Building & ID Concrete Slab Dog Training Area [513(7)] CWM EE/CA Feet PARSONS ENGINEERING SCIENCE, INC. MAD DESIGNED BY: DRAWN BY: MAD CHECKED BY: JC/JU SUBMITTED BY: JC/JU SCALE: DATE: FILE: Figure 14.1 FORT McCLELLAN ANNISTON, ALABAMA CALHOUN COUNTY 1 inch equals 100 feet May 2002 x:\gis\734643\maps\ Eeca_maps(revised2)\ figure14_1.mxd U.S. ARMY CORPS OF ENGINEERS HUNTSVILLE CENTER PROJECT NUMBER: PAGE NUMBER:

11 SECTION 15 OLD BURN PIT [514(7)] 15.1 SITE HISTORY The Old Burn Pit is in the woods behind the motor pool area on Rucker Street (formerly 13th Avenue). It is across the dirt road just to the west of the northwest corner of the D&I Area (Figure 2.2) This site was identified for consideration during the field visit of the ASR (USACE, 1999). Although nothing is known about the site and this area is not specifically listed as hosting chemical training, it appeared to be a burn pit, was in the general vicinity of other CWM training sites, and therefore was selected for further sampling to ensure that CWM was not present PREVIOUS INVESTIGATIONS The aerial photograph analysis shows a well-defined cleared area in the 1961 aerial photograph that coincides with the location of the burn pit. A site visit conducted by Parsons in February 1999 showed the area behind the motor pool to be wooded, but the remains of the pit were still visible. The pit was covered over with a wire mesh and contained some remnant metallic objects within it RESULTS OF INVESTIGATION Intrusive Investigation Three depressions near the Old Burn Pit were investigated intrusively using hand tools. During the excavations, continuous air monitoring was done using the MINICAMS, OPFTIR, and PID. The approximate locations of the pits are shown on Figure Burn Pit 1 which was the primary objective of this study was found to contain multiple inert and practice OE items, as well as other metal debris. Pit 2, which was noted during the investigation of Burn Pit 1, contained a steel box containing cans, wire-wrapped cans, plate glass, and a dummy grenade. Pit 3, also identified during this field work, contained flakes of rust and jar lids. No evidence was encountered such as charred wood to suggest that these pits were ever used for burning. A summary of the findings is included in Table Photo 15.1 shows the items found in the pits I:\COE-HUNT\MCLEECA\_EECA\SECTIONS\SECTION15.DOC 6/18/02

12 Table 15.1 Old Burn Pit Field Investigation Summary Fort McClellan, Alabama Number Anom. Anomaly Intrusive Anom. of Disposition Depth ID Date Type Findings contacts (inches) Comments Pit #1 5/10/01 S Pack frames Left in place 48 5/10/01 S Electrical breaker box Left in place 48 5/10/01 S Chain, electrical parts, pipe Left in place 48 5/10/01 S Rusted drum pieces Left in place 48 5/10/01 OS Practice rifle grenade bodies 23 removed 48 OE Drum#1 - Oxford Scrap Metal 5/10/01 OS Practice 60mm mortars w/fins 2 removed 48 OE Drum#1 - Oxford Scrap Metal 5/10/01 OS 81mm mortar, empty, no fuze, 1 removed 48 OE Drum#1 - Oxford Scrap Metal no primer 5/10/01 OS Rifle grenade tail booms 2 removed 48 OE Drum#1 - Oxford Scrap Metal /10/01 OS.30-cal casings & clips Multiple removed 48 OE Drum#1 - Oxford Scrap Metal Pit #2 5/10/01 S Steel box w/cans Left in place 4 5/14/01 S wire wrapped cans 2 Left in place 6 5/14/01 S Plate glass Left in place 12 5/14/01 OS Practice grenade (MK2) 1 removed 12 OE Drum#1 - Oxford Scrap Metal Pit #3 5/14/01 S Rust flakes Left in place 3 S Pint jar lids 2 Left in place 3 Notes: Northing, easting = approximate center of anomaly Anomaly Type: CS = chemical warfare materiel scrap, OS = ordnance scrap, S = other metallic scrap, O = other, NI = not investigated Hot rock/soil = rock or soil that exhibits a strong response on a metal detector I:\COEHUNT\MCLEECA\ _EECA\SECTIONS\Tbls-1.xlsOld Burn Pit 6/18/02

13 15.4 DESCRIPTION OF HAZARDS OF SPECIFIC CWM ENCOUNTERED OE items encountered during the intrusive investigation at the Old Burn Pit included practice rifle grenade bodies, 60mm practice mortar rounds, a 81mm mortar round, a mortar tail fin, rifle grenade tail booms, and.30-caliber casings. OE items were vented and/or certified to be inert by the HFA SUXOS, and were disposed of as scrap to Photo 15.1 Ordnance Found at Old Burn Pit Oxford Scrap Metal Company. No evidence of CWM was found; the items recovered were all conventional ordnance-related. Metallic anomalies were still present in the sidewalls of the pits following termination of intrusive activity QUALITATIVE RISK EVALUATION Some OE items were uncovered from one of the pits at this site, however no CWM was uncovered. All suspect pits at this site were partially excavated during this investigation, and it is not likely that others exist. Based on the results of the present investigation, it can be inferred there are no sources of CWM in the environment at the Old Burn Pits, and therefore the probability of current and future risk of human exposure to chemical agents is unlikely RECOMMENDED CWM RESPONSE ACTION ALTERNATIVE Several inert and practice OE-related items were identified during intrusive investigations at the Old Burn Pit, and these items were all removed and properly disposed. The results from this CWM EE/CA support the historical evidence that CWM 15-3 I:\COE-HUNT\MCLEECA\_EECA\SECTIONS\SECTION15.DOC 6/18/02

14 training was not conducted at this site. Thus, it can be inferred that current and future human health risks due to exposure to CWM at this site are very unlikely. The NFA response alternative achieves the response action goal of minimizing the public s exposure to CWM. The NFA response alternative is effective, implementable, and has no cost. Therefore, the NFA alternative is recommended as the CWM response alternative for implementation at the Old Burn Pit. In addition, any warning signs for CWM previously posted as precautionary measures should be removed. Remaining OE will be addressed under follow-on OE investigations I:\COE-HUNT\MCLEECA\_EECA\SECTIONS\SECTION15.DOC 6/18/02

15 Motorpool Parking OBP-3 OBP OBP-1 Unimproved Road Legend OBP-1 Excavation & ID Fence Road/Parking Feature Topographic Contour (5 ft Interval) Water Feature Old Burn Pit [514(7)] CWM EE/CA Feet PARSONS ENGINEERING SCIENCE, INC. MAD DESIGNED BY: DRAWN BY: CHECKED BY: MAD JC/JU SUBMITTED BY: JC/JU SCALE: DATE: FILE: Figure 15.1 FORT McCLELLAN ANNISTON, ALABAMA CALHOUN COUNTY 1 inch equals 50 feet May 2002 x:\gis\734643\maps\ Eeca_maps(revised2)\ figure15_1.mxd U.S. ARMY CORPS OF ENGINEERS HUNTSVILLE CENTER PROJECT NUMBER: PAGE NUMBER:

16 SECTION 16 FIELD PERSONNEL DECONTAMINATION AREA [515(7)] 16.1 SITE HISTORY The Field Personnel Decontamination Area was reported to be north of 24th Street, between Reggie Avenue (formerly 12th Avenue) and Rucker Street (formerly 13th Avenue) (USACE, 1999). Based on a map of the cantonment area and the site orientation visit in September 1998, the location is north of 26th Street, not 24th Street (Figure 2.2) This site was listed as the Field Personnel Decontamination Area on the 1969 Chemical School Orientation Map. A Personnel Decontamination Station was depicted in the same vicinity on the 1956 Map of Chemical Corps Training. Therefore, this area may have been used for personnel decontamination as early as the 1950s. The site was possibly used as a final field decontamination station following initial decontamination at Naylor Field. Trainees reportedly conducted initial decontamination at Naylor Field then walked to this site and conducted a second decontamination of their boots in the shuffle pit. Based on the site visit conducted in September 1998, a shuffle pit was still located in the center of the area (Figure 16.1). This shuffle pit may or may not have existed at this location in the 1950s, as it is not apparent on historic aerial photographs until sometime between 1969 and PREVIOUS INVESTIGATIONS The historical aerial photograph analysis shows activity in the vicinity at the site, but it is not known what those activities were. It is possible that a building on the 1954 aerial photograph located in the southern portion of the site was used for field personnel decontamination, but it has been removed prior to the 1961 photograph. It appears, from verbal reports and historical maps, that the current shuffle pit may be in the field personnel decontamination area During a site visit conducted by Parsons in February 1999, the remains of several former buildings were found but no indications of burial were seen. Information from interviews with former fort personnel suggests that the only chemical decontamination agent used at the shuffle pit was STB. The shuffle pit (Building 3173) remains, along with some old foundations RESULTS OF INVESTIGATION Four hand auger borings were advanced adjacent to the building slab to evaluate the possible presence of CWM constituents. The locations are shown on Figure Soil 16-1 I:\COE-HUNT\MCLEECA\ _EECA\SECTIONS\SECTION16.DOC 6/18/02

17 samples were collected from each boring at 0.5 to 1 foot and 3.5 to 4 feet below ground surface. During the hand augering, continuous air monitoring was done using the MINICAMS, OPFTIR, and PID. The samples were screened for GB and HD agents by ECBC prior to Parsons shipping the samples to ECBC s laboratory. The samples were analyzed for GB and HD. No concentrations were detected above the reporting limits. The analytical results are summarized in Table 16.1; the laboratory analytical data is presented in Appendix B DESCRIPTION OF HAZARDS OF SPECIFIC CWM ENCOUNTERED Historical documents do not indicate that CWM was specifically used at this site. Reportedly, trainees using live agents at adjacent sites came to this site for secondary decontamination. No actual use of agent at this site was reported. No CWM was encountered during the hand augering QUALITATIVE RISK EVALUATION Historical documents do not indicate that chemical warfare agent was used for training activities at the Field Personnel Decontamination Area; the site was apparently only used for secondary decontamination, after an initial decontamination at Naylor Field. It is unlikely that chemical warfare agent would have contaminated the site soils. In addition, the chemical warfare agents generally do not persist in the environment, so any chemical warfare agent that may have contacted site soils would likely have degraded. Based on soil analytical results collected during this investigation from areas most likely impacted, it can be inferred that no residual agents exist in the sampled media. Based on the historical records and the sampling conducted it can be inferred there are no sources of CWM remaining in the environment at the Field Personnel Decontamination Area, and therefore the probability of current and future risk of human exposure to chemical agents is very unlikely RECOMMENDED CWM RESPONSE ACTION ALTERNATIVE The Field Personnel Decontamination Area was not used for chemical warfare training, but rather for decontamination purposes after activities at nearby sites. Thus, no CWM was used at the site. In addition, no evidence of soil contamination by chemical agent was found during this investigation. Thus, it can be inferred that current and future human health risks due to exposure to CWM at this site are very unlikely. The NFA response alternative achieves the response action goal of minimizing the public s exposure to CWM. The NFA response alternative is effective, implementable and has no cost. Therefore, the NFA alternative is recommended as the CWM response alternative for implementation at the Field Personnel Decontamination Area. In addition, any warning signs for CWM previously posted as precautionary measures should be removed I:\COE-HUNT\MCLEECA\ _EECA\SECTIONS\SECTION16.DOC 6/18/02

18 Table 16.1 Soil Analytical Summary Field Personnel Decontamination Area Fort McClellan, Alabama Date ID GB HD 5/31/01 FPD-SB1-1-6"-1.0' <20 <200 5/31/01 FPD-SB '-4.0' <20 <200 5/31/01 FPD-SB2-1-6"-1.0' <20 <200 5/31/01 FPD-SB '-4.0' <20 <200 5/31/01 FPD-SB3-1-6"-1.0' <20 <200 5/31/01 FPD-SB '-4.0' <20 <200 5/31/01 FPD-SB4-1-6"-1.0' <20 <200 5/31/01 FPD-SB '-4.0' <20 <200 units = µg/g I:\COE-HUNT\MCLEECA\_EECA\ SECTIONS\Tbls-2.xlsFPD /18/02

19 Justice Avenue (Formerly 11th Avenue) Rucker Street (Formerly 13th Avenue) FPD-SB-3 FPD-SB-1 FPD-SB Shuffle Pit FPD-SB Approximate Location of Foundation (circa 1950's) Reggie Avenue (Formerly 12th Avenue) Legend FPD-SB Soil Boring & ID Road/Parking Feature Topographic Contour (5 ft Interval) Water Feature Field Personnel [515(7)] Decontamination Area CWM EE/CA PARSONS ENGINEERING SCIENCE, INC. Figure 16.1 FORT McCLELLAN ANNISTON, ALABAMA CALHOUN COUNTY SCALE: Field Personnel Decontamination Area CHECKED BY: 1 inch equals 100 feet BLC DATE: PAGE Building & ID May 2002 NUMBER: SUBMITTED BY: x:\gis\734643\maps\ Feet FILE: Concrete Slab Eeca_maps(revised2)\ 16-4 DRAWN BY: MAD DESIGNED BY: MAD BLC figure16_1.mxd U.S. ARMY CORPS OF ENGINEERS HUNTSVILLE CENTER PROJECT NUMBER:

20 SECTION 17 OLD TOXIC TRAINING AREA [188(7)] 17.1 SITE DESCRIPTION The Old Toxic Training Area is reported to be located in a ditch or shallow depression on the south side of Building 3183, east of Rucker Street (formerly 13th Avenue) (Figure 2.2). Some interviewees indicated the actual location was on the east side of the building (ESE, 1998). The total area is about 484 square feet (USATHAMA, 1977) This training area was used during the early 1950s for detection and identification of agents prior to development of the D&I Area. Agents used included HD, probably in small, training quantities, but the actual quantities used are unknown (ESE, 1984). Other agents such as choking agent, blood agents and VX were also reported to have been used (ESE, 1998). Agents were placed on the ground surface during the training exercises (Weston, 1990). However, based on facility SOPs it is likely that surficial soil decontamination was conducted following training PREVIOUS INVESTIGATIONS The SI completed in 1993 included four soil samples collected from two locations at depths of about one foot and five feet (SAIC, 1993). The two sampling locations were along the centerline of the ditch. The samples were screened for HD by TEU using the MINICAMS and nothing was detected above background readings. Laboratory analyses for degradation products were also negative Historical aerial photograph analysis does not show any significant indications of CWM activity at this site over the years. Since the ditch south of the building was investigated during the SI, and some reports indicated that the ditch was located east of the building, it was decided that this EE/CA investigation would be focused on the second area. A bare area that could be a ditch is visible east of the building in the 1954 aerial photograph. No other anomalies appear to be ditches on the east side of the building A site visit by Parsons in February 1999 determined that the area east of Building 3183 is paved as a parking lot/driveway. Historical reports indicate that agent was not placed on the ground from 1961 to It appears most likely that if agent was put on the ground, it was prior to I:\COE-HUNT\MCLEECA\_EECA\SECTIONS\SECTION17.DOC 7/20/02

21 17.3 RESULTS OF INVESTIGATION Soil Sampling Two hand auger borings were advanced at the area east of Building 3183 to evaluate the possible presence of agent contaminated soil. The locations are shown on Figure These samples were collected because some interviewees remembered the training area as being to the east of the building. Soil samples were collected from each boring at 0.5 to 1 foot and 3.5 to 4 feet below ground surface. During the hand augering, continuous air monitoring was done using the MINICAMS, OPFTIR, and PID. The samples were screened for GB and HD agents by ECBC prior to Parsons shipping the samples to ECBC s laboratory. The samples were analyzed for GB and HD. No concentrations were detected above the reporting limits. The analytical results are summarized in Table The laboratory analytical data are presented in Appendix B. Photo 17.1 shows coring of the pavement to allow access for soil sampling. Photo 17.1 Pavement Coring at Old Toxic Training Area 17.4 DESCRIPTION OF HAZARDS OF SPECIFIC CWM ENCOUNTERED Historical documents suggest that only small quantities of agents were used at this site; agent-filled or contaminated munitions apparently were not used here. No CWM 17-2 I:\COE-HUNT\MCLEECA\_EECA\SECTIONS\SECTION17.DOC 7/20/02

22 Table 17.1 Soil Analytical Summary Old Toxic Training Area Fort McClellan, Alabama Date ID GB HD 6/6/01 OTT-SB1-1-6"-1.0' <20 <200 6/6/01 OTT-SB '-4.0' <20 <200 6/6/01 OTT-SB2-1-6"-1.0' <20 <200 6/6/01 OTT-SB '-4.0' <20 <200 units = µg/g I:\COE-HUNT\MCLEECA\_EECA\ SECTIONS\Tbls-2.xlsOTT /18/02

23 items were observed during the intrusive investigation. Analyses of soil samples indicate that no agent or breakdown products are present at the site QUALITATIVE RISK EVALUATION Only small quantities of chemical agent were used for training activities at the Old Toxic Training Area. Any items contacted by chemical agent, including the underlying soils, were decontaminated using excess amounts of decontaminating agents. In addition, the chemical agent compounds generally do not persist in the environment, so any chemical agents would likely have degraded. Based on soil analytical results collected during this investigation from areas most likely impacted, and on the historical records, it can be inferred there are no sources of CWM remaining in the environment at the Old Toxic Training Area, and therefore the probability of current and future risk of human exposure to chemical agents is very unlikely RECOMMENDED CWM RESPONSE ACTION ALTERNATIVE Although the Old Toxic Training Area was used for agent detection and identification training in the past, no evidence of soil contamination by chemical agent has been found during past and present investigations. Thus, it can be inferred that current and future human health risks due to exposure to CWM at this site are very unlikely. The NFA response alternative achieves the response action goal of minimizing the public s exposure to CWM. The NFA response alternative is effective, implementable, and has no cost. Therefore, the NFA alternative is recommended as the CWM response alternative for implementation at the Old Toxic Training Area. In addition, any warning signs for CWM previously posted as precautionary measures should be removed I:\COE-HUNT\MCLEECA\_EECA\SECTIONS\SECTION17.DOC 7/20/02

24 OTT-SB-1 BG DH Stem Avenue (Formerly 23rd Street) OTT-SB-2 13th Avenue) (Formerly Street Rucker Legend OTT-SB Soil Boring & ID Road/Parking Feature Topographic Contour (5 ft Interval) Old Toxic Training Area Building & ID Old Toxic Training Area [188(7)] CWM EE/CA Feet PARSONS ENGINEERING SCIENCE, INC. MAD DESIGNED BY: DRAWN BY: MAD CHECKED BY: JC/JU SUBMITTED BY: JC/JU SCALE: DATE: FILE: Figure 17.1 FORT McCLELLAN ANNISTON, ALABAMA CALHOUN COUNTY 1 inch equals 100 feet May 2002 PROJECT NUMBER: U.S. ARMY CORPS OF ENGINEERS HUNTSVILLE CENTER PAGE NUMBER: x:\gis\734643\maps\ Eeca_maps(revised2)\ 17-5 figure17_1.mxd