Groundwater: High Risk

There are at least two layers of groundwater, shallow overburden and deep bedrock. GW feeds seeps on site, and GW is used to the south and west of the site for potable supply. Seep water may be contacted by NASA personnel and grounds keepers. Five miles downgradient from PBOW is the city of Milan, having its potable water potentially impacted by PBOW

Contaminants: Lead 459.0 ug/L 2,6-Dinitrotoluene 550.0 ug/L Chromium 561.0 ug/L 1,3,5-Trinitrobenzene 680.0 ug/L Arsenic 1780.0 ug/L 1,3-Dinitrobenzene 4800.0 ug/L 2,4-Dinitrophenol 5900.0 ug/L 2,4-Dinitrotoluene 9200.0 ug/L Manganese and compounds 55100.0 ug/L Aluminum 280000.0 ug/L Iron 679000.0 ug/L

Surface Water (Fresh): Medium Risk

PRR has a drainage ditch that runs between PRR and Pentolite Road and definitely runs off-site. The eastern portion of WAR is an approximate 5 foot deep pond. There are endangered plants and special concern terrestrial receptors confirmed. Fish and crawfish have been detected in both WAR and PRR.

Contaminants: Lead 77.0 ug/L

Sediment (Fresh): Low Risk

Sediment from WAR is most likely not migrating. Sediment from the drainage ditch that runs between PRR and Pentolite Road has potential to migrate, but no significant level of nitroaromatics have been detected in this water system. Potential wildlife receptors such as fish (known to exist in both WAR and PRR) and benthic organisms.

Contaminants: Chromium 28.7 mg/kg Lead 32.1 mg/kg Manganese 726.0 mg/kg

Sediment (Human): Low Risk

PRR ponds have been filled in. The Western WAR pond sediment exhibits virtually no TNT product, and is confined to the pond. Sediment from Pipe Creek and Plum Brook may migrate off-site. Potentially hunters.

Contaminants: 1,3,5-Trinitrobenzene 0.8 mg/kg Chromium 28.7 mg/kg Lead 32.1 mg/kg Manganese and compounds 726.0 mg/kg

Soil: Low Risk

PRR is mostly a wetland-esque area, and not normally traversed by humans. WAR has some exposed soil areas and may be considered the point of contact. The areas are open to hunters and on occassion, NASA employees may be out in either WAR or PRR for groundskeeping.

Contaminants: 2,4,6-Trinitrotoluene (TNT) 0.27 mg/kg 1,3,5-Trinitrobenzene 1.7 mg/kg Arsenic 22.0 mg/kg 2,4-Dinitrotoluene 204.0 mg/kg Manganese and compounds 1340.0 mg/kg Aluminum 20600.0 mg/kg Iron 36000.0 mg/kg

Surface Water (Human): Low Risk

PRR ponds have been filled in, and half of the WAR pond had been drained in 1977 by NASA and partially filled, and the other half of WAR is approximately a 5 foot deep pond. There is now a depression on the PRR that does pool water (witha red tint) durin The area is open to hunters during hunting season.

Contaminants: 2,6-Dinitrotoluene 0.8 ug/L Lead 77.0 ug/L Manganese and compounds 1600.0 ug/L Aluminum 13800.0 ug/L

Soil: High Risk

Soil is the point of exposure for site workers in and around this area. Site workers in and around this area.

Contaminants: Benzo[a]pyrene 0.498 mg/kg 2,6-Dinitrotoluene 4.12 mg/kg 2,4-Dinitrotoluene 9.88 mg/kg Lead 103.0 mg/kg

Groundwater: Low Risk

This area has overburden groundwater that is characterized as lenses with a strong correlation with precipitation. There does not appear to be much impact if at all to the bedrock groundwater. note from Sept 2010 GMA (Locomotive Bld Area) Site Char There are no groundwater users on the site. Overburnden groundwater is lily to be discontinuous pockets. There are at least 6 known off-site water wells beyond the boundary of PBOW.

Contaminants: p-Nitrotoluene 8.6 ug/L 2,6-Dinitrotoluene 12.4 ug/L 2,4-Dinitrotoluene 17.8 ug/L o-Nitrotoluene 74.7 ug/L

Sediment (Human): Risk Not Evaluated

This AOC has not been assessed yet.

Surface Water (Human): Risk Not Evaluated

This AOC has not been evaluated yet.

Soil: High Risk

The media serves as a pathway for contaminants to migrate to exposure points of plausible concern. Hunters use the property during open hunting season, and NASA personnel groundskeeper enter the area to maintain the area. One should note Upland Sandpipers, Bald Eagles and Copper's Hawks are confirmed in nesting and feeding in the area. Smallmouth Salamanders, American Toads, Western Chorus Frog are known to be proximity.

Contaminants: 2,3,7,8-TCDD (dioxin) 0.001187 mg/kg Polychlorinated biphenyls (PCBs) 44.4 mg/kg 1,3,5-Trinitrobenzene 85.4 mg/kg 2,6-Dinitrotoluene 1400.0 mg/kg Lead 8220.0 mg/kg 2,4-Dinitrotoluene 9700.0 mg/kg 2,4,6-Trinitrotoluene (TNT) 35400.0 mg/kg

Groundwater: Medium Risk

Groundwater does not appear to have much site related chemicals in it. Groundwater is unconfined, and may be connected to off-site groundwater to the west of Reservoir 2 Burning Grounds, where site related chemicals have been detected at the PBOW boundar There are potable GW users to the west and south of the PBOW. The groundwater under Reservoir 2 Burning Grounds is not currently used, but may be used in the future when GSA excesses the property.

Contaminants: Lead 17.9 ug/L Benzene 2460.0 ug/L

Sediment (Human): Risk Not Evaluated

There is no SW or sediment within the boundaries of the AOC. The closest water is Reservoir #2 that is approx. 1000 feet north of the AOC. Pipe Creek is approx 2000 feet north of the AOC. There is no SW or sediment within the boundaries of the AOC.

Surface Water (Human): Risk Not Evaluated

There is no SW in this AOC. There is Reservoir #2 approx 1000 feet north of the AOC. There is Pipe Creek approx 2000 feet north of the AOC. There is no SW in this AOC. There is Reservoir #2 approx 1000 feet north of the AOC.

Groundwater: Medium Risk

Groundwater in WWTP1, WWTP3 and associated sewerlines are centrally located in the PBOW fenced site, and there is no direct use of GW in these area. It is not clear if GW is migrating from the site to the north for WWTP1, and to the north and west for WW There are no current groundwater users at WWTP1 or WWTP3 or associated sewerlines. It is unclear if GW from these sites have migrated off-site to the north of WWTP1 and to the north and west of WWTP3. Down gradient boundary wells have detected low level Army related chemicals, there are 6 know private resident GW wells downgradiant from PBOW, and Lake Erie which is the public water supply and recreation water body.

Contaminants: 2,6-Dinitrotoluene 4.14 ug/L 2,4-Dinitrotoluene 9.92 ug/L 2,4,6-Trinitrotoluene (TNT) 59.9 ug/L Benzene 403.0 ug/L

Soil: Medium Risk

Chemicals are at the point of exposure in soil. None of the areas, WWTP1, WWTP3 and related sewerlines are areas where there are workers on a daily basis. Both WWTPs and parts of the sewerlines are maintained by NASA groundskeeper approximately semi-annual.

Contaminants: Aroclor-1016 1.16 mg/kg 2,4-Dinitrotoluene 3.25 mg/kg Benzo[a]pyrene 10.0 mg/kg Arsenic 20.8 mg/kg Lead 134.0 mg/kg Nickel (soluble salts) 135.0 mg/kg 2,4,6-Trinitrotoluene (TNT) 1380.0 mg/kg Iron 65600.0 mg/kg

Surface Water (Human): Risk Not Evaluated

This AOC has not been evaluated yet.

Groundwater: Medium Risk

A facility wide GW flow pattern is generally to the north and northeast towards Sandusky, OH and Lake Erie, and appears to be applicable to Acid Areas 1 and 3. At Acid Area 2 there is westerly groundwater "swirl" with site related chemicals detected off-s There are at least 6 off-site residential wells down gradient from PBOW, and these well may potentially be used for irrigation of crops.

Contaminants: 2,6-Dinitrotoluene 1.7 ug/L 2,4-Dinitrotoluene 2.5 ug/L 2,4,6-Trinitrotoluene (TNT) 2.7 ug/L Lead 26.3 ug/L

Soil: Medium Risk

Acid Area 1 is surrounded by areas that are used by NASA, their contractors, so the soil is at point of potential exposure. Acid Area 2 is the most west AOC of PBOW and is a confined exposure because it is overgrown and mostly no one goes there except fo NASA personnel and contractors work in the surrounding area of Acid Area 1, and occasionally has grounds keeping of Acid Area 1 with a potential for human contact with Acid Area 1. Acid Area 2 is not maintained, and it does not appear that people go to this area most of the year. Acid Area 2 is part of an area where hunters may go during a limited period time, so the recept factor here is limited. Acid Area 3 is an open maintained grassy area at a major PBOW intersection of Maintenance Rd and Ransom Rd and near the K-Site, and there is low to potential exposure to the groundskeeper and other NASA employees and contractors.

Contaminants: 2,4-Dinitrotoluene 5.8 mg/kg Benzo[a]pyrene 7.3 mg/kg Polychlorinated biphenyls (PCBs) 31.4 mg/kg Lead 7410.0 mg/kg Iron 36100.0 mg/kg

Sediment (Human): Risk Not Evaluated

There is no viable surface water or sediment in the Acid Areas

Surface Water (Human): Risk Not Evaluated

There is no viable surface water in the Acid Areas There is no viable surface wter in the Acid Areas

Soil: Medium Risk

The media is the point of exposure. Overland flow into Pipe Creek is possible. There is a gully/drainage ditch from the site that leads to Pipe Creek, and there is debris that leads into Pipe Creek. Trespasser, hunter and fisherman during open season (and nearing Pipe Creek), NASA personnel.

Contaminants: Benzo[a]pyrene 5.7 mg/kg Polychlorinated biphenyls (PCBs) 5.8 mg/kg Vanadium and compounds 35.9 mg/kg Nickel (soluble salts) 39.3 mg/kg Antimony and compounds 106.0 mg/kg Lead 2870.0 mg/kg Manganese and compounds 5310.0 mg/kg Iron 35500.0 mg/kg

Groundwater: Risk Not Evaluated

Has not been assessed yet.

Sediment (Human): Risk Not Evaluated

This AOC has not been assessed yet.

Surface Water (Human): Risk Not Evaluated

This AOC has not been evaluated yet.

Soil: Medium Risk

Site related chemicals are fairly wide spread at AA3, but there is not enough data to show that site related chemicals have moved beyond the borders of AA3. Site workers may be at or near AA3. AA3 is located adjacent to maintenance and storage areas, and the site maintained by site workers.

Contaminants: Benzo[a]pyrene 3.3 mg/kg Aroclor-1254 4.18 mg/kg Aroclor-1260 4.66 mg/kg Lead 653.0 mg/kg

Groundwater: Low Risk

Site related chemicals in groundwater may have moved feet from AA3, and the data does not show that the site related chemicals have moved away from AA3. Currently there are no potable water wells at AA3. There are private groundwater wells off-site and to the north of PBOW and AA3, but there is no evidence that AA3 has impacted private groundwater wells off-site.

Contaminants: Lead 16.6 ug/L Barium and compounds 967.0 ug/L

Sediment (Human): Low Risk

Surface water and sediment were analyzed at and very near down stream from AA3. It appears that there may be slight migration down stream. Site workers who maintain AA3, work at the adjacent maintenance area and storage areas may come into contact with the surface water and sediment system at AA3 during maintenace activities or traversing the site. There isn't enough water in the surface water and sediement system for swimming or wading.

Contaminants: Aroclor-1254 0.473 mg/kg Benzo[a]pyrene 0.51 mg/kg Aroclor-1260 1.13 mg/kg Lead 84.1 mg/kg

Surface Water (Human): Low Risk

Surface water and sediment were analyzed at and very near down stream from AA3. It appears that there may be slight migration down stream. Site workers who maintain AA3, work at the adjacent maintenance area and storage areas may come into contact with the surface water and sediment system at AA3 during maintenace activities or traversing the site. There isn't enough water in the surface water and sediement system for swimming or wading.

Contaminants: 1,1,1-Trichloroethane 3.8 ug/L Manganese and compounds 147.0 ug/L

Soil: Low Risk

Contaminants are at exposure point concentrations. NASA groundkeeper maintaining the grounds a few times per year.

Contaminants: Beryllium and compounds 16.5 mg/kg Chromium 19.5 mg/kg Lead 28.8 mg/kg Nickel (soluble salts) 43.4 mg/kg Arsenic 60.8 mg/kg Cobalt 62.2 mg/kg Barium and compounds 451.0 mg/kg Iron 90300.0 mg/kg

Groundwater: Risk Not Evaluated

Has not been assessed yet.

Sediment (Human): Risk Not Evaluated

This AOC has not been assessed yet.

Surface Water (Human): Risk Not Evaluated

This AOC has not been evaluated yet.

Groundwater: Low Risk

There has been site related chemicals detected off-site at low levels. It is unknown if AA2 is a contributor to off-site low levels of site related chemicals. There are no confining layers, and there is no evidence site related groundwater chemicals has Currently there is no potable water wells at AA2. There are private groundwater wells off-site and to the west of AA2 which maybe used irrigation/agriculture for the crop fields directly adjacent and off-site to the west of AA2, but it is unknown if those private wells are used for potable water or home water wells.

Contaminants: 1,3-Dinitrobenzene 0.81 ug/L 2,4,6-Trinitrotoluene (TNT) 1.6 ug/L

Sediment (Human): Low Risk

Surface water and sediment was only sampled in and around AA2, so it is unknown if there is any migration of chemicals off-site. Currently there is low to no human contact with surface water or sediment around AA2. There are only site workers and hunters in the AA2 area at present, and neither population is expected to spend much time, if at all, in the surface water and sediment system at AA2.

Contaminants: 1,3,5-Trinitrobenzene 0.14 mg/kg 2,4,6-Trinitrotoluene (TNT) 0.77 mg/kg Aroclor-1254 1.52 mg/kg Benzo[a]pyrene 2.9 mg/kg Aroclor-1260 18.0 mg/kg Barium and compounds 111.0 mg/kg Lead 1460.0 mg/kg

Soil: Low Risk

Site related chemicals have been detected wide spread over all of AA2, but there is not enough sample results off-site to determine the extent for the determination of Evident. Currently there only human receptors in contact with AA2 soil are site workers and hunters. Currently site workers and hunters are not expected in AA2 on a regular basis, nor for prolonged durations of days/weeks at a time.

Contaminants: Aroclor-1254 16.0 mg/kg Aroclor-1260 31.4 mg/kg Lead 7410.0 mg/kg

Surface Water (Human): Low Risk

Surface water and sediment was only sampled in and around AA2, so it is unknown if there is any migration of chemicals off-site. Currently there is low to no human contact with surface water or sediment around AA2. There are only site workers and hunters in the AA2 area at present, and neither population is expected to spend much time, if at all, in the surface water and sediment system at AA2.

Contaminants: Trichloroethylene (TCE) 0.3 ug/L Lead 26.3 ug/L Barium and compounds 60.3 ug/L

Soil: Low Risk

This site has not been fully characterized. Soil, as a point of contact for human exposure, is limited at this time. Limited at this time, but further investigation may prove otherwise.

Contaminants: Xylenes 0.0065 mg/kg Toluene 0.018 mg/kg Benzo[a]pyrene 0.17 mg/kg Arsenic 21.2 mg/kg Lead 32.2 mg/kg Manganese and compounds 1560.0 mg/kg Aluminum 13900.0 mg/kg Iron 107000.0 mg/kg

Groundwater: Risk Not Evaluated

Has not been assessed yet.