PUBLIC HEALTH ASSESSMENT
NORTON AIR FORCE BASE
NORTON AIR FORCE BASE, SAN BERNARDINO, CALIFORNIA
Table 1. Evaluation of Potential Public Health Hazards Associated with the Installation Restoration Program Sites and Area of Concern Sites at Norton Air Force Base
| Site/Location | Site Description/Waste Disposal History | Investigation Results/Environmental Monitoring Results | Corrective Activities and Current Status | Public Health Evaluation |
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INSTALLATION RESTORATION PROGRAM (IRP) SITES |
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| IRP Site 1. Industrial Waste Lagoons. | A liquid waste impoundment comprising lagoons that received liquefied industrial wastes from 1950 to 1960. Wastes are believed to contain chromates, organic solvents, phenols, and waste oils. The lagoons were backfilled and became part of the golf course around 1960. | Soil: Sludge layer beneath 5 feet of
fill material is contaminated with volatile organic compounds (VOCs), semi-volatile
organic compounds (SVOCs), and metals above soil target cleanup goals (TCGs).
The soil beneath the sludge layer also contains VOC and SVOC concentrations
above the TCGs. Groundwater: No VOCs detected in monitoring well (MW) 296 or MW297, located in the Gage Canal Area (GCA). Radionuclides: No radionuclides detected above background levels. |
Corrective Activities: • Monitoring wells installed. • April 1995: Radionuclide investigations. • 1996: Engineering Evaluation/Cost Analysis (EE/CA) completed. • December 1996: Excavation of contaminated soils began; contaminated soils hauled to an off-site disposal area. Current Status: |
No public health hazards are associated with this site. Soils: Contaminants were detected in the subsurface but are inaccessible. Remedial activities have reduced contaminant concentration levels to those protective of human health. Groundwater: GCA wells have been and continue to be tested and blended to meet drinking water standards. The potential for future contaminant migration to groundwater has been eliminated: the overlying soil and sludge has been removed, the groundwater is not currently affected, and treatment provisions are available for GCA production wells if contaminant levels exceed the maximum contaminant level (MCL). |
| IRP Site 2. Landfill Number 2. | Landfill operating from 1958 to 1980. General refuse; construction debris; and rubble and industrial waste, including spent solvents, acids, refrigerants, paint strippers, paints, thinners, waste oil, and sludge, were reportedly disposed of on this site. | Soil Gas: Investigations indicate the
presence of landfill gas (LFG) containing methane and VOCs [primarily tetrachloroethylene
(PCE) and to a lesser extent vinyl chloride]. Groundwater: PCE, trichloroethylene (TCE), 1,2-dichloroethlyene (1,2-DCE), and vinyl chloride have infrequently been detected above their MCLs. Groundwater contains VOCs, primarily PCE, at levels below the MCLs. |
Corrective Activities: • 1993: Three tri-level probe soil gas monitoring wells were installed around perimeter of the landfill. • February 1996:Soil vapor extraction (SVE) treatability study concluded in the northwest corner of the site. Current Status: |
No public health hazard exists on site. Soil: Past access was not restricted until fence was installed in 1995; nonetheless, public exposure to buried waste material was unlikely. Access is highly restricted, so exposure to the general public is highly unlikely. Because the landfill will be capped and long-term future use for the site will be an undeveloped vegetated open space, no future public health hazard exists. Groundwater: No production wells are located in this area, therefore, no past or current exposure to groundwater contamination exists. No wells will be installed until cleanup goals are achieved; therefore, no future exposures to contaminants exist. |
| Site 3. Waste Pit Number 2. | A 1957-era waste pit that received sludge from IRP Site 1 and miscellaneous wastes such as metal, waste oils, and grease from mess hall grease traps. | Soil/Soil Gas: No chemicals were detected
at concentrations above soil TCGs in any of the samples collected. One soil
gas sample detected VOCs at concentrations less than 0.01 parts per billion
(ppb). Groundwater: No VOCs or SVOCs were detected in any of the monitoring well samples in the perched zone. TCE, toluene, and PCE have been detected in the upper aquifer wells at concentrations below 3 ppb, which is below their respective MCLs. |
Corrective Activities: • Investigations included ground penetrating radar (GPR), conductivity, and metal detection surveys to confirm or deny the presence of a suspected waste pit. • Five groundwater monitoring wells have been installed in the vicinity of the site; two are screened in the perched zone (MW3 and MW30) and three are screened in the upper aquifer (MW229, MW6, and MW 283). Current Status: |
No public health hazard is associated with this site. Soil: Contaminants aredetected at concentrations that do not pose a health hazard. Groundwater: No production wells are located in this area; therefore, past and current exposure to contaminated groundwater does not exist. In the future, exposures will not pose a public health hazard because current groundwater concentrations are below the MCLs, and no contaminants have been detected in overlying soils. |
| IRP Site 4. Waste Pit Number 1. | A suspected disposal site for drummed waste in the 1950s. Wastes disposed in the pit were occasionally burned. | Soils: Elevated concentrations of arsenic
were detected at levels of 4.2 parts per million (ppm), which is below the
EPA soil average of 5 ppm. All other metals were detected at background
concentrations. Organic compounds were not detected to 5 feet below ground
surface (bgs). There was no evidence of waste disposal (e.g., debris, ash,
stained soil) in any of the soil samples. Groundwater: Sporadic detections of TCE (0.53 ppb to 2.4 ppb), 1,1,1-trichloroethane (0.66 ppb to 0.092 ppb), toluene (0.11 ppb), and some metals were reported in perched groundwater samples; groundwater contaminants are likely from IRP Site 1. |
Corrective Activities: • Investigations included GPR surveys to confirm or deny the presence of waste pit. • Four groundwater monitoring wells have been installed in the vicinity of the site; all are screened in the perched zone (MW29, MW31, MW32, and MW139). • 1996: Excavation and off-site disposal of contaminated soils. Current Status: |
No public health hazard is associated with this site. Soil: All contamination was restricted to the subsurface and therefore inaccessible. No public health hazard currently exists or will exist in the future because contamination has been removed and the site is located beneath a concrete irrigation reservoir, which is not going to be removed. Groundwater: No production wells are located in the this area; therefore, there were and are no exposures to groundwater. Future exposures will not pose a public health hazard: the groundwater below the perched zone, which is the viable drinking water source, is not currently affected by soil contamination; and the potential for future contaminant migration has been eliminated through removal of the soil contaminant source (see IRP Site 1). |
| IRP Site 5. Fire Training Protection Area Number 1. | Fire control and abatement exercises were routinely performed in this area between the 1950s and 1970s. Waste fuels, waste oils, spent solvent, and JP-4 and JP-5 fuels were used during the exercises. | Soils are contaminated in the surface and subsurface with hydrocarbons, dioxins, metals, and polynuclear aromatic hydrocarbons (PAHs) at levels in excess of industrial reuse and groundwater protective TCGs. | Corrective Activities: • January 1996: SVE system in place. • September through October 1997: Excavation of metals, dioxins, and PAH-contaminated soil. Stabilized soil will be used as foundation material for IRP Site 2 cap. Stabilized material exceeding STLC requirements has been disposed off site. • SVE activities have been completed. Current Status: |
No public health hazard exists because access to site is restricted; current and past exposure to contamination is highly unlikely. No future public health hazard will exist because remedial activities will have reduced contaminant concentration to levels that do not pose public health hazards. |
| IRP Site 6. Underground waste oil storage tank. | Location of six underground storage tanks (USTs) constructed (on concrete slabs) in 1942 that leaked onto the site. USTs contained waste oil hydraulic fluid, other cleaning solvents, and motor fuel. | Fluroanthene, pyrene, toluene, benzo(a)pyrene, benzo(a)fluoranthene, antimony, arsenic, beryllium, chromium, copper, lead, mercury, nickel, selenium, silver, thallium, and zinc were detected in the soil beneath the leaking tank. | Corrective Actions: • 1981: Tanks tested for leakage; one tank was found to be leaking. • 1982: Tanks were removed; concrete slabs left in place. • June 1996: Contaminated soil excavated to a depth of 20 feet bgs and treated on site using a bioremediation process before reuse or off-site disposal. • Confirmatory soil sampling indicates hydrocarbon levels below TCGs. • Remedial actions completed in 1996. • Site closed June 1996. |
No public health hazard exists on site. No past exposures occurred because contamination was limited to the subsurface. Current and future exposures will not occur because remedial activities have reduced contaminant concentrations to levels that do not pose public health hazards. |
| IRP Site 7. Industrial Waste Treatment Plant Sludge Drying Beds. | Twelve unlined sludge drying beds with concrete retaining walls in operation until April 1987. | Soil: Surface soil sampling indicates
metals above background concentrations. Subsurface soil (beneath the sludge
bed) contains isolated detections of metals and does not appear to be affected.
No SVOCs or VOCs were detected in any soil samples. Groundwater: Upper Aquifer- No SVOCs or metals were detected above MCLs. No VOCs were detected above MCLs from June 1991 through October 1995. MW97, MW205, and MW207 are sampled as guard wells for the GCA production wells. No VOCs have ever been detected in MW97; no VOCs have been detected in MW205 and MW207 since April 1995. Prior to that, MW205 and MW207 had sporadic detections of VOCs below 1 µg/L. Perched zone- Groundwater samples have been found to contain VOCs in concentrations below MCLs with sporadic detections of metals above background. No VOCs have been detected in any since 1991. |
Corrective Activities: • 1984 to 1991: Thirteen groundwater monitoring wells were installed in the vicinity of site IRP Site 7; five screened in the perched zone (MW10, MW61, MW62, MW100, and MW106) and eight in the upper aquifer (MW64, MW97, MW98, MW107, MW204, MW205, MW207, and MW240). • 1987: Remaining sludge removed from sludge beds. Current Status: |
Soil: No health hazards exist because
exposure was unlikely and infrequent; therefore, contaminant concentrations
are not associated with health hazards. Future hazards have been eliminated
through the removal of the contaminated sludge. Groundwater: No health hazards exist because (1) perched groundwater is not a viable drinking water source; (2) contaminants detected in the upper aquifer have not exceeded standards which are protective of human health; and (3) the upper aquifer will continue to be monitored. |
| IRP Site 8. PCB spill area. | Inactive PCB transformers and drums of dielectric fluids and soils, all containing PCBs, were stored at this site. Drums and PCB transformers may have leaked over the years. A spill of approximately 20 to 30 gallons occurred in May 1982. | PCBs are present above the industrial TCGs in surface or shallow subsurface soils. | Corrective Activities: • 1982: Excavation and off-site disposal of PCB-contaminated soils. • 1996: Contaminated soils were further excavated and either transported to IRP Site 2 landfill for reuse as foundation material for the final landfill cover system or, if hazardous, sent to off-site disposal. • Excavated areas were backfilled with clean soil. Current Status: |
No past exposures occurred because all contamination was limited to the subsurface. Even if the subsurface soils are brought to the surface, there will be no health hazard because remedial activities have reduced contamination concentration to levels that are protective of human health. |
| IRP Site 9. Electroplating
Shop in Building 763.
TCE plume source area. |
An electroplating shop in use from 1943 to 1994. From 1942 to the 1980s, solvents and plating solutions were spilled on this site during aircraft parts cleaning and metal replating.(1) Waste materials included TCE and trichloroethane; sludge; hydrofluoric acid; anodizing solutions; cyanide waste solutions; and chromium-, nickel-, and gold-plating solutions. | Soil: TCE was detected at depths from
5 to 15 feet bgs and in deep soils from 20 to 60 feet bgs (maximum concentration
1.1 ppm; average concentration less than 0.05 ppm). Chromium commingled
with TCE was detected above TCGs in soil samples to a maximum depth of 12
feet bgs. Groundwater: VOCs, including TCE, were detected above drinking water standards. See text discussions regarding groundwater contamination. |
Corrective Activities: • 1991: Upper 3 feet of soil in Docks 3 and 4 of Building 763 excavated; excavated soils treated via SVE. • Chromium-contaminated concrete and chromium- and TCE-contaminated soil excavated and disposed off site at a licensed hazardous waste landfill. • Confirmation studies verified removal of all soil and concrete containing chromium at concentrations in excess of cleanup standards. • Groundwater monitoring. • Groundwater pump and treat system; air stripping treatment. • Carbon absorption treatment for air emissions where needed. Current Status: |
No public health hazards are associated with this site. Soil: Past access to this site was limited; therefore, exposure to contamination by the general public was highly unlikely. Even if the contaminated subsurface soils are brought to the surface, no health hazard exists because remedial activities reduced contaminant concentrations to levels that are protective of human health. Groundwater: No production wells are located in this area; therefore, past and current exposures to groundwater do not exist. No future public health hazards exist: groundwater is being monitored; deed restrictions are in place to prevent installation of production wells in the areas that still contain VOCs above cleanup standards; provisions are available for affected production wells in the TCE plume; and water purveyors are continuing to test and blend groundwater. |
| IRP Site 10. Landfill Number 1. | Shallow fill area used by the Air Force from 1943 to 1958 for building up the portion of the base along the Santa Ana River wash. General debris (e.g., burned wood, wood ash, non-native soil, glass, porcelain, metal, concrete, and other types of construction material) were reportedly placed at this site and routinely burned. | Soil: Soils (1 foot bgs) are contaminated
with the metals in limited areas; levels exceed soil TCGs. Metal concentrations
in subsurface soil samples were detected within the background range for
Norton AFB. Groundwater: Groundwater monitoring results indicated background levels of metals but no other chemicals indicative of landfill waste. |
Corrective Actions: • One well installed on site; other wells installed in the vicinity of IRP Site 10. Current Status: |
No public health hazards are associated with this site. Soil: All contamination is limited to areas below 1 foot. No current public health hazards exist because contamination remains below the existing Palm Meadows golf course. Deed restrictions will prevent any future public health hazards from occurring. Groundwater: No contaminants were detected in sampling events. |
| IRP Site 11. Fuel Sludge Drying Beds. | A fuel sludge drying area used from 1958 until the mid-1970s. | Soil: Soil sampling results indicate
the presence of PAHs, TPH (5.1 ppm to 38 ppm), and toluene (5 ppb to 19
ppb) in subsurface soil; no constituents were detected above soil TCGs.
Metals have been only sporadically detected above background concentrations
in surface soils. Groundwater: VOCs and semivolatiles were sporadically detected in groundwater in the vicinity of IRP Site 11. Two VOCs were detected, toluene (6.4 ppb and 5.6 ppb in October 1992) and PCE (0.1 ppb in April 1994). |
Corrective Activities: • 1988 to 1991: Five groundwater monitoring wells, screened in the upper aquifer, were installed (MW122, MW123, MW157, MW241, and MW260). Current Status: |
No public health hazard is associated with this site. Soil: Contamination is present at levels that do not pose public health hazards. Groundwater: No production wells are in the vicinity of Site 11; therefore, no past or current public health hazard exists. Groundwater will continue to be monitored until closure of IRP Site 2; further monitoring may be required for closure. See IRP Site 2. |
| IRP Site 12. Waste Pit Number 3. | Waste pit reportedly used for the disposal of chemical wastes and other miscellaneous wastes, including lumber, since 1958. Burning of waste at this site was also reported in localized areas. | Elevated metal (arsenic and chromium) concentrations exceeding the TCGs were detected in subsurface soils in localized areas. | Corrective Actions: • Site 12 was subject to a subsurface geophysical survey that resulted in the identification of three subsurface areas of potential concern. Current Status: |
No past or current public health hazards exist because contamination is limited to subsurface soils. Deed restrictions will limit the future use of this site and human exposures to contamination; restrictions will protect human health. |
| IRP Site 13. IWTP Sludge Disposal Area. | Disposal area for IWTP sludge from 1957 to 1966. | Elevated levels of PCBs, toluene, arsenic, chromium, and lead were detected in soils from 0 to 5 feet at levels greater than TCGs. | Corrective Activities: • Late 1996: Excavation of soil contaminated by metals and PCBs completed; soil was either disposed of on IRP Site 2 as part of the landfill cap or, if hazardous, at an off-site location. Current Status: |
No current or future public health hazard is associated with this site. Access was restricted (past), so exposure of contamination to the general public is highly unlikely. Contaminated soils have been excavated. |
| IRP Site 14. Waste Pit No. 4. | Two former disposal pits for disposal of waste paints, thinners, and coatings; pits operated from the 1940s to the 1960s. Diluted paint washwater was disposed in the pits from the 1960s to the mid-1980s. | Toluene and metals at levels higher than background concentrations were detected in subsurface soil samples. | Corrective Actions: • Soil contaminated by hydrocarbons and metal has been excavated. Current Status: |
No past or current public health hazards exist because contamination is limited to subsurface soils. Current/future exposure of contamination to the general public does not exist because contaminated soils have been excavated. |
| IRP Site 15. S-290 Tank. Base production well located in this area. |
A UST used to store petroleum products, oils, and lubricants in conjunction with a base service station from the mid-1940s to early 1970s. Spills and leaks from transfer containers reportedly occurred on site. | Soil: Detections of organic and inorganic
compounds in the soil were isolated; no VOCs, SVOCs, metals, oil and grease,
cyanide, organochlorine pesticides, and TPH were detected above soil TCGs. Groundwater: VOCs were repeatedly detected in groundwater upgradient and downgradient of site; metals were sporadically detected above background concentrations. |
Corrective Activities: • 1986 to 1987: Tank removed; wastes remaining in tank sent for off-site disposal. • 1988 to 1991: Seven groundwater monitoring wells, screened in the upper aquifer, were installed in the vicinity of site (MW110, MW113, MW236, MW249, MW269, MW270, and MW276). Current Status: |
No public health hazard is associated with this site. Soil: Contamination was detected at concentrations that do not pose a public health hazard. Groundwater: No contamination above standards protective of human health has been detected in the base production well located in this area; therefore, no past or present exposure to contaminated drinking water from this well could have occurred. No future exposure to the groundwater is expected because groundwater will be monitored and potential migration of contamination is mitigated via tank removal and IRP Site 2 capping. |
| IRP Site 16. Air Combat Camera Services (ACCS) Evaporation Basins. |
The ACCS facility provided audiovisual services from 1968 to 1994. The evaporation ponds were used to evaporate ammonium sulfate and sodium thiosulfate waste. No historical reports indicate the storage of waste solvents. | No VOCs were detected in soil samples; no metals above background were detected during soil investigations outside the ponds. | Corrective Activities: • 1981: The basins were relined with bituminous coating to prevent leaking through the original asphalt liner. • Evaporation ponds have been removed, soil excavated, and ponds backfilled to surrounding grade to ensure proper runoff and to prevent ponding. Current Status: |
No public health hazard is associated with this site because contaminants were detected at concentrations that do not pose a health hazard. |
| IRP Site 17. Drummed Waste Storage Area/Waste Fuel and Solvent Sump. | Two brick-lined sumps constructed during the early 1960s to burn waste fuels and solvents. Waste burning in sumps ceased in 1961, at which time they began storing drums of cyanide solutions, chromic acids, nickel plating solutions, TCE sludge, phenolic paint strippers, toluene, waste paint thinners, and other waste products. Use of this site for waste storage purposes ended in 1985. | Soil: TCE has not been detected in shallow
soil samples; however, subsurface soil samples (greater than 10 feet bgs)
have exhibited low concentrations of TCE [typically less than 10 ppb, with
a historical maximum level reported at 110 ppb (in 1993 soil sample)]. Soil
gas samples have also detected TCE at low levels (14 µg/L). Groundwater: TCE and 1,2-DCE were present in concentrations above their MCLs in perched-zone groundwater; concentrations range from non-detect to 140 ppb. Current (1996) TCE levels range between non-detect and 40 ppb; however, only one perched zone well in the vicinity of Site 17 contained water during April 1996. |
Corrective Activities: • 1984 to 1986: Monitoring wells installed. • May 1996: Monitoring well (MW299) installed downgradient to site at the water table level. • Drums used to store waste material removed and sump use terminated. Current Status: |
No past or current public health hazards exist on site. Soil: All contamination is restricted to the subsurface and is therefore inaccessible to the general public. This site will remain in use as a public golf course, so excavation and general public exposure to the contaminated subsurface soils will not occur. Groundwater: Contaminants were detected in the perched zone groundwater (25 to 28 feet deep), which is not a viable drinking water source; therefore, no past or current exposure to contaminated groundwater exists. TCE contamination in the perched zone overlies a drinking water aquifer located 90 ft bgs; the upper aquifer does not appear to be affected. Because monitoring wells have been installed in the upper aquifer downgradient from the site and two new perched wells (shallow wells) will be installed for perched zone dewatering, no future public health hazards are expected from exposure to contaminated drinking water. |
| IRP Site 18. Aviation Gasoline Spill Area. | This site was used as an aircraft storage and overhaul area, prior to construction of two JP-4 tanks, from 1950 to 1965. Fuel and oil spills possibly occurred during maintenance operations. | Soils: Subsurface soil sampling results
indicate isolated detections of metals above background concentrations and
low concentrations of VOCs and SVOCs. No VOCs or TPH compounds were detected
in soil gas samples. Groundwater: No SVOCs were detected in groundwater samples. No VOCs were detected above the MCLs. |
Corrective Activities: • 1986 to 1991: Eight groundwater monitoring wells (MW141, MW143, MW145, MW223, MW233, MW245, MW248, and MW275) were installed and screened in the upper aquifer. Current Status: |
No public health hazard exists at this site. Soils: Contaminants are present at levels that do not pose a public health hazard. Groundwater: No contamination was detected in groundwater samples in the vicinity of this site. |
| IRP Site 19. Waste Drum Storage Area Number 1. | Former waste drum storage area in use from 1943 to 1960. Waste from electroplating and corrosion control was stored on this site, including TCE and TCA sludge; cyanide waste solutions; and chromium-, nickel-, and gold-plating waste solutions. | Soil: PCBs have been identified as the
primary contaminant of concern, mostly in the 0 to 6 inch interval below
the concrete; maximum detection of PCB is 62.4 ppm. Ethylbenzene, xylene,
and chromium, at maximum levels of 12 ppm, 180 ppm, and 209 ppm, respectively,
were detected in only one or two samples. No TCE, 1,2-DCE, or metals (e.g.,
cadmium, copper, lead, nickel, and zinc) were detected at levels above their
respective TCGs. Groundwater: No metals or VOCs have been detected in groundwater. |
Current Status: • Site is currently covered by 24 inches of concrete and used as a flightline apron for parking aircraft. • Deed restrictions will be placed on this site to preclude inadvertent or intentional removal of the concrete unless contaminated soils are removed. |
No public health hazard is associated with this site. Soil: The concrete on IRP Site 19 has been in place since 1966, so it is highly unlikely that past exposure to contamination occurred. Soil contamination is located below 24 inches of concrete, so current exposure to the general public will not occur. Deed restrictions will prevent future public health hazards. Groundwater: PCBs have not affected the groundwater. The 24 inches of concrete above the soil contamination will prevent surface water from infiltrating to the aquifer; therefore, contamination of groundwater is not expected. |
| IRP Site 20. Low-Level Radioactive Bunker Burial Site. | Alleged low-level radioactive waste burial site. Allegations were made that a concrete bunker on site was used in the 1950s and the 1960s for storage of paint and paint wastes containing radium. | Radionuclides detected during soil sampling were below respective upper tolerance limits (UTLs) for all radionuclide chemicals of potential concern (COPCs) except Thorium-228 and Thorium-232; those two radionuclides were detected above UTLs, but below background levels. | Corrective Activities: • Three separate geophysical surveys were conducted to locate the alleged bunker. • Eight exploratory trenches were excavated in four targeted areas to locate the alleged bunker. • Excavated trenches were backfilled. Current Status: |
No public health hazards are associated with this site. Contaminants present do not pose human health hazards. No bunker was located on site. |
| IRP Site 21. Underground Ferricyanide Tank. | In-ground waste collection sump and process tank used for the collection of ferricyanide waste. | No VOCs detected in subsurface soil samples; no metals detected above background concentrations in subsurface soil samples. No surface soil samples were collected because the tanks suspected of leakage were buried. | Corrective Activities: • The sumps and tanks have been removed. Current Status: |
No public health hazard is associated with this site. Contamination is limited to the subsurface and at levels that do not pose a public health hazard. |
| IRP Site 22. IWTP Discharge Ditch and Outfall Area. | From 1960 to 1987, a historical outfall ditch routed the waste materials off base to the Santa Ana River wash. The IWTP discharge ditch was used from 1980 to 1987. The outfall waste materials have been routed to a seepage pond on base since 1987. | Numerous metals were detected during soil investigations, but were detected at or below background concentrations. Arsenic (4.4 ppm) exceeded the background concentrations in subsurface soils, but the level is below the EPA soil average of 5 ppm. | Current Status: • Closed in 1996. • Action Memorandum decision document has been finalized (no action required). |
No public health hazard is associated at this site because contaminants are only present in the subsurface and therefore inaccessible. Further, contaminants were detected at levels that do not pose a public health hazard. |
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AREAS OF CONCERN (AOC) |
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| AOC 1. Building 248. |
Dry well area used for stormwater discharge; discharge may have been mixed with photochemical wastewater from the Aerospace Audiovisual Services (AAVS). AAVS operations included the use, storage, and disposal of solvents, paints, cyanide, potassium, sodium thiosulfate, and other film developing-related chemicals. | VOCs, SVOCs, and metals were not detected in sediment and soil samples. Cyanide was not detected in the subsurface soil sample. Copper and zinc were detected at concentrations exceeding background concentrations in subsurface soil samples. | Current Status: • No further action is warranted. |
No public health hazard is associated with this site. No contaminants are present at concentrations that present a public health hazard. |
| AOC 2. Building 258. |
Floor drains and exterior concrete sumps located in the hazardous material storage facility for the AAVS facility. Records on sump disposal practices in this building are not available. | Sediment samples collected from each sump were analyzed for SVOCs, metals, and cyanide. Metals detected in the sediment include lead (90 ppm and 128 ppm), zinc (648 ppm and 329 ppm), and cyanide (31 ppm and 7.1 ppm). Subsurface soils were also collected. No VOCs were detected in subsurface soil samples except methylene chloride, which was detected below ATSDR comparison values. Several PAHs were detected in subsurface soil sample at levels ranging from 240 ppb [indeno (1,2,3-cd) pyrene] to 1200 ppb (pyrene). Cyanide was detected at 1 foot bgs at 2 ppm. No VOCs were detected in soil gas samples. | Current Status: • No further action is warranted. |
No public health hazard exists at this site. Contaminants were present at levels that do not pose a public health hazard. |
| AOC 3. Building 295. |
Automotive maintenance facility in operation from the early 1940s until the late 1960s or early 1970s. A dirt lot now occupies the site of the former structure. Hazardous materials that may have been used, stored, or disposed of at this former site are unknown. | Metals and PAHs in sump sediment; no significant waste constituents in site soils. | Corrective Activities: • Sump cleaned; waste disposed of off site. • Sump filled with grout. Current Status: |
No contaminants were detected in soils at concentrations that represent public health hazards. |
| AOC 4. Building 301. | Solids collection pit and trench drains facility for equipment and vehicle washing. During the 1950s, this site was used as part of the paint spraying facility; a separator/dosing chamber, connected to the sanitary sewer system, was installed in 1951. | VOCs, metals (arsenic, chromium, lead), and fuels were detected in levels slightly above the TCGs in subsurface soils. Contaminants are limited to near surface depths. | Current Status: • Paved and covered areas of AOC 4 are being used for vehicle and equipment storage by the San Bernardino Fire Department. • The site will be deed restricted, limiting the future land use of the property to industrial/commercial activities. • Final EE/CA issued July 1, 1997. Action Memorandum stating No Further Action was distributed June 30, 1997. |
No public health hazards are associated with this site. No past exposures occurred because all contamination was limited to the subsurface. Presently, access is highly restricted, so no current exposure potential exists. Deed restrictions will limit redevelopment on this site and prevent future public health hazards from occurring. |
| AOC 5. Building 302. |
Aircraft maintenance facility that was used throughout the history of Norton AFB. All wastes were drummed and stored temporarily in a bermed area inside the hangar before being transported. | No fuels, SVOCs, or PCBs were detected. Only one metal was detected in excess of Norton AFB background levels for subsurface soils (antimony at 5.78 ppm). | Current Status: • No further action is warranted. |
No public health hazard is associated with this site. Contaminants were detected below background or ATSDR comparison values, except for antimony. Although antimony exceeds ATSDR comparison values, contamination is isolated in the subsurface and therefore inaccessible. Exposure to soil contamination is highly unlikely. |
| AOC 6. Buildings 313, 317, and 320. |
Operations in Building 313 included radiator repair, welding, and machine work; caustic soda, zinc chlorine, antifreeze, hydraulic fluids, and other materials were used. Waste was reportedly dumped directly onto the asphalt and surrounding dirt area. Building 317 was used as a grease inspection rack during the 1950s and 1960s. Building 320 was used as a hobby shop and paint spray booth during the 1960s. Records to indicate the hazardous materials that have been stored, used, or disposed of at these buildings were not available. | Soil gas samples were collected; no VOCs above the detection limit were found. No VOCs, SVOCs, or PCBs were detected in any of the subsurface samples collected. Several metals were detected in subsurface soil samples at levels below TCGs. | Current Status: • No further action is warranted. |
No public health hazard is associated with this site. Contaminants in the subsurface were detected at concentrations that do not pose a health hazard. |
| AOC 7. Building 330. |
Automobile body and paint shop warehouse used from the 1940s to the 1960s. The building was most recently used for stripping, sanding, and painting of vehicles. | No VOCs or SVOCs were detected in any of the subsurface samples. Several metals were reported as slightly in excess of background concentrations for subsurface soil; however, the levels were below industrial soil TCGs. Surface soil samples indicate metals at concentrations in excess of background levels but below TCGs. | Current Status: • No further action is warranted. |
No public health hazard is associated with this site. Contaminants were detected at concentrations that do not pose a health hazard. Future use of the site will be industrial/commercial. |
| AOC 8. Building 337. |
Aircraft, vehicle, and equipment wash rack used since the mid-1940s. Drainage system at this facility was reportedly ineffective in collecting all the wastewater generated. Consequently, waste entered the storm drain systems and seeped through cracks in the asphalt. | No VOCs were detected in the soil gas. No VOCs, fuels, or metals above background levels were detected in subsurface soil samples. Surface soil samples contained low levels of PAHs. Metals (e.g., cadmium, chromium, copper, lead, and mercury) were reported at levels greater than soil background levels. | Current Status: • No further action is warranted. |
No public health hazard is associated with this site. Contaminants were detected at concentrations that do not pose a health hazard. |
| AOC 9. Buildings 333 and 341. |
Aircraft and vehicle maintenance facilities. Waste oil generated at these facilities was disposed of into a UST. Other wastes such as contaminated fuel, antifreeze, batteries, oil filters, and rags were drummed on site prior to transfer. Equipment and vehicles were washed between these two buildings. | No VOCs were detected in any of the soil gas samples. No VOCs, SVOCs, PCBs, fuels, or metals above background were detected in soil sampling. | Current Status: • No further action is warranted. |
No public health hazard is associated with this site. No contaminants were detected above background concentrations. |
| AOC 10. Building 336. |
Building 336 is a former vehicle washing facility that was used from 1973 to the late 1980s. Records to indicate the hazardous materials used, stored, or disposed of at this facility are not available. | VOCs were not detected in any of the soil gas samples. No VOCs, SVOCs, or fuels were detected in subsurface soils beneath sand grease trap. Fuel and VOCs were detected in grease trap material. | Corrective Activities: • Grease trap cleaned. Current Status: |
No public health hazard is associated with this site. No contaminants were detected in soil during sampling events. |
| AOC 11. Building 338. |
This building was used for sanitary latrine purposes in the 1950s and 1960s. It was further used as a battery acid and disposal shop until late 1991. The battery acids were disposed of into a drain connected to the sanitary sewer system; occasional spills occurred in the building. Acids were not neutralized prior to disposal. | Soil samples were collected inside the building and along the sanitary sewer line. Shallow soil sampling was also conducted. Both were analyzed for metals, soil pH, and nitrates. No metals were reported above background range for the subsurface soils analyzed. | Current Status: • No further action is warranted. |
No public health hazard is associated with this site. No contaminants were detected above background concentrations. |
| AOC 12. Building 344. |
This building was used as a film library in the 1940s and as a warehouse during the 1950s and early 1960s. This building was later converted to a dry cleaning and laundry facility in 1964. Operations are believed to have ended prior to 1976. Hazardous materials used, stored, or disposed of at the facility are unknown. | PCE was detected in soil gas samples at levels ranging from 1.1 µg/L to 3.7 µg/L. 1,1,1-TCA was also detected in soil gas samples at concentrations ranging from 0.12 µg/L to 5.8 µg/L. No VOCs were detected in soil samples. | Current Status: • No further action is warranted. |
No public health hazard exists at this site. Contaminants were present at levels that do not pose public health hazards. |
| AOC 13. Building 345. |
Civilian washing facility installed in the mid-1980s. Vehicle washing at the facility may have resulted in washing oils, grease, and fuels from vehicles onto the pavements and into the wastewater collection system. | 1,1,1-TCA was detected in soil gas investigations at concentrations of 1.7 µg/L to 14.3 µg/L. 1,1,1-TCA was not detected in any soil samples. No VOCs or fuels were detected in any soil samples. | Current Status: • No further action is warranted. |
No public health hazard exists at this site. Contaminants were detected at levels that do not pose public health hazards. |
| AOC 14. Buildings 405 and 408. |
Gasoline storage/motor pool shed during the 1950s and 1960s. 1967 liquid fuels map indicates the presence of a UST; it is unknown when this facility was closed; if the UST was removed; or what hazardous wastes were used, stored, or disposed of at this location. | No VOCs or fuel components were detected in soil gas samples. No radiation counts were detected above background in subsurface soils. Analytical results indicate that all radionuclide COPCs are below UTLs except uranium 12 to 15 feet bgs. | Corrective Activities: • April 1995: Geophysical survey of site. • Exploratory trenches excavated on site to assess subsurface anomaly and radioactivity. Current Status: |
No public health hazard is associated with this site. Contaminants were present at levels that do not pose public health hazards. Uranium detected above UTLs in the subsurface was below background levels; human exposure to contaminants did not occur. |
| AOC 15. Building 432. |
Automotive maintenance facility constructed in 1942 and removed in the late 1960s or early 1970s. Location of the former building is covered with asphalt for dormitory parking. Hazardous materials used, stored, or disposed of on site is unknown. | No VOCs were detected in the soil gas samples analyzed. No VOCs or fuels were detected in subsurface soil samples. No surface soil data are available. | Current Status: • No further action is warranted. |
No public health hazard is associated with this site. No contaminants were detected during sampling events of subsurface soil. No surface soil data are available; however, the former site was removed in the late 1960s and replaced with asphalt. There is no public access to surface or subsurface soils. |
| AOC 16. Building 435. |
Engine test facility and automobile maintenance center constructed in 1942 and removed sometime in the late 1960s or early 1970s. | Soil gas samples were collected; no VOCs were detected. | Current Status: • No further action is warranted. |
No public health hazard is associated with this site. No contaminants were detected during sampling events. |
| AOC 17. Buildings 441 and 442. |
Vehicle and equipment wash rack facilities constructed in 1942 and removed sometime in the late 1960s or early 1970s. Most recently used for dormitory parking and as a driveway to the post office. No records indicate what hazardous wastes were used, stored, or disposed of on this site. | Soil gas samples were collected; no VOCs were detected. | Current Status: • No further action is warranted. |
No public health hazard is associated with this site. No contaminants were detected during sampling events. |
| AOC 18. Buildings 451 and 452. |
Building 451 is a former garage and gas and oil station in operation from 1942 to the late 1960s or early 1970s. Building 452 was the site of USTs. A 1942 drawing indicates five USTs, while a 1967 site drawing indicates that only two USTs were present at this site. No available records indicate that the USTs were used for the storage of gasoline. | No VOCs were detected in any of the soil gas samples. VOCs and fuels are present in soils at depths greater than 10 feet bgs. Maximum soil contamination of ethylbenzene is 52 ppm and xylene is 160 ppm. VOCs were detected in much lower concentrations 10 feet bgs indicating contamination is limited to an isolated area. | Current Status: • Commercial/business redevelopment is planned; area will be deed restricted. • Final EE/CA issued July 1, 1997. Action Memorandum stating No Further Action was distributed June 30, 1997. |
No public health hazards exist because all contamination was limited to the subsurface. Presently, no exposure to contaminants exists because the contamination lies below pavement. Deed restrictions will prevent future residential development on site. |
| AOC 19. Buildings 576 and 578. |
Automotive repair shop/wash rack in operation from 1943 to the late 1960s or early 1970s. Records to indicate what was disposed of at these buildings are not available. | No detectable levels of VOCs were identified in the soil gas sampling. No VOCs or fuel components in the subsurface soils sample were reported. | Current Status: • No further action is warranted. |
No public health hazard is associated with this site. No contaminants were detected during sampling events. |
| AOC 20. Building 635. |
Chemical and salvage storage from 1942 to 1968. Materials stored in this building included flammable and inflammable chemicals; poisons; and acids. In 1968, the building was converted into offices and a vehicle maintenance facility. Fuels, oils, hydraulic fluids, and solvents were used in the maintenance operations. The automotive shop was closed in 1990. Most recently, boxes and furniture were stored inside the building; the building is now vacant. | No VOCs were detected in the soil gas samples. No SVOCs, fuels, PCBs, or metals above background levels were detected in subsurface soil samples. TCE was detected at 8 ppb 20 feet bgs. | Current Status: • No further action is warranted. |
No public health hazard is associated with this site. No past exposure occurred because contamination was limited to the subsurface soil. |
| AOC 21. Building 638. |
Radio repair/electronics/armament shop. The building was most recently occupied by the communications squadron. | No VOCs were detected in any of the soil or soil gas samples. No SVOCs, PCBs, or metals above background were identified in the soil sampling analysis. Soil pH results were in the neutral range. | Current Status: • No further action is warranted. |
No public health hazard is associated with this site. No contaminants were detected in any of the sampling events. |
| AOC 22. Building 653. |
Former fueling system site constructed in 1942; the facility held four USTs that are believed to have been removed in the 1980s during the construction of the commissary. | Soil gas samples were collected; no VOCs were detected. | Current Status: • No further action is warranted. |
No public health hazard is associated with this site. No contaminants were detected during sampling events. |
| AOC 23. Building 655. Southwest of Building 673, TCE source area. |
Aircraft reclamation facility-repair shop operating from 1942 to the late 1960s. The building was most recently used as a warehouse to store recreation and security mobile equipment. Solvent and TCE were used at this facility. Records describing the storage and disposal practices at this facility are not available. | TCE was detected in a majority of the soil gas samples at levels ranging from 0.84 µg/L to 9.7 µg/L. (Most likely the soil gas source is Building 673.) No TCE detected in the subsurface soil samples exceeded industrial TCGs (detected in two samples at 2 ppb and 5 ppb); diesel was identified in one sample at 20 ppm. No soil samples collected and analyzed by the TCLP method exceeded TCE TCGs. | Corrective Activities: • Sump cleaned; waste disposed of off site. • Site demolished and replaced with a parking lot as a part of San Bernardino International Airport redevelopment. Current Status: |
No public health hazards exist at this site. No past exposures occurred because all contamination was limited to subsurface soils. Current and future contaminant exposure does not exist because contaminated soils in the subsurface are presently located beneath parking lot pavement, which will remain in place. Furthermore, contaminants are present at levels that do not pose a public health hazard. |
| AOC 24. Building 658. South of Building 673 TCE source area. |
An equipment and engineering maintenance facility operating from 1942 to the 1960s. The building became a logistical facility in the mid-1960s. Since that time, the facility was used for storage and offices, and housed the base printing and reproduction operations. Solvent was used at this facility. Former maintenance facility storage and disposal practices are not available. It is alleged that depleted uranium weights used for ballasts in cargo aircraft were ground and shaped in this building. | TCE: TCE was reported in soil gas samples
between 0.55 µg/L and 6 µg/L. (Most likely soil gas source is Building 673.)
TCE detected at depths from 2.5 to 10 feet bgs at TCLP levels greater than
5 µg/L. No SVOCs or metals exceeding background levels were detected in any
of the subsurface soil samples. Gasoline was not detected in any of the
subsurface soil samples; however, diesel was detected in one subsurface
soil sample. Radionuclides: No alpha or gamma radiation was detected above background during field screening. All radionuclide activities in soil samples were below UTLs except Strontium-90. A duplicate sample did not detect elevated Strontium-90 levels. |
Corrective Activities: • TCE-contaminated soil excavated and transported to off-site SVE treatment facility. • Confirmatory sampling. • Modified drive-over survey for radionuclide investigations. Current Status: |
No public health hazard exists on site. Soil (TCE): No past exposure occurred because contamination was limited to the subsurface. No current or future public health hazards exist because contaminated soil has been removed. Soil (Radionuclides): No radionuclide exposure exists because radiation was not detected above background levels. |
| AOC 25. Building 678. |
Armament repair facility operating from 1943 to sometime in the late 1960s or early 1970s. Solvent, TCE, lube oil, and carbon removers were used at this facility. Operation, storage, and disposal practices of the facility are unknown. The current fire station is located in a portion of the area occupied by Building 678. | PCE was detected in soil gas samples at 0.22 µg/L. No VOCs were detected in soil samples. | Current Status: • No further action is warranted. |
No public health hazard is associated with this site. Contaminants were present at levels that do not pose a human health hazard. |
| AOC 26. Building 695. |
Aircraft maintenance hangar operating from 1942 until the base closure. An oil-water separator and an UST were installed in 1967 to separate fuel-related waste prior to discharge into the storm drain system. | Soil gas samples were collected; no VOCs were detected. | Current Status: • A 1,000 gallon waste fuel tank and an oil-water separator were removed; site has been closed. • No further action is warranted. |
No public health hazard is associated with this site. No contaminants were detected during sampling events. |
| AOC 27. Building 705. |
Engine processing facility operating from the 1940s to the mid-1960s. The building was most recently used as a warehouse, office, and repair facility by Civil Engineering's grounds and pavement group. | Soil gas samples were collected; no VOCs were detected. | Current Status: • No further action is warranted. |
No public health hazard is associated with this site. No contaminants were detected during sampling events. |
| AOC 28. Building 707. |
Rubber reclamation and repair facility that operated from 1944 to the mid-1960s. This building was used as a reproduction shop from the mid-1960s into the 1980s. A former base water supply well (No. 10) is located east of the building. The building was most recently used as a publications distribution facility by Norton AFB and for automotive repair and storage by Lockheed. Stoddard solvent, TCE, lube oil, and carbon removers were used at this facility. No other records exist regarding storage and disposal practices at this former facility. | VOCs were not detected in any of the shallow soil gas samples. No VOCs, SVOCs, gasoline, or metals were detected above background in any soil samples. | Current Status: • No further action is warranted. |
No public health hazard exists at this site. Soils: No contaminants were detected above background concentrations. Groundwater: No contaminants were detected in the soils on Site 28; therefore, any groundwater contamination in aquifer below is not attributed to activities on this site. No groundwater data are available for abandoned well No. 10. See text for detailed discussion of groundwater quality on base. |
| AOC 29. Buildings 723, 724, and 725. |
Building 723 is an engine-testing facility that operated from 1942 to the early 1980s. The facility was connected to underground fuel and waste fuel lines and USTs. Building 724 contained six USTs that stored various gasolines and one UST that stored waste oil. Building 725 contained drums storing wastes and two USTs that stored waste fuels; this building was removed in the mid-1980s. | No VOCs were detected in the soil gas samples analyzed. Only one VOC was detected in the soils; chlorobenzene (3 ppb) was detected at a concentration less than the TCG. Gasoline was not detected in any of the subsurface soils. | Corrective Activities: • Geophysical survey was conducted to confirm the presence or absence of the USTs at the former Buildings 724 and 725; the USTs are no longer present. Current Status: |
No public health hazard exists at this site. Contaminants were detected below background or ATSDR comparison values. |
| AOC 30. Building 726. |
Engine test facility that operated from the late 1940s or early 1950s until it was closed in 1992. | Soil gas samples were collected; low levels of VOCs were detected. | Current Status: • No further action is warranted. |
No public health hazard is associated with this site. Contaminants were detected at levels that do not pose a public health hazard. |
| AOC 31. Building 736. |
Hazardous test and fuels facility that operated from the 1950s to the 1960s. The facility was converted into a logistical facility in the late 1960s with a plastics shop, battery shop, mechanical equipment room, and a refrigeration shop. The battery shop sump was used for the disposal of waste from an industrial waste system. | TCE was reported at a concentration levels of 11 µg/L in the soil gas sample. Freon 113 (1,1,2-trichloro-1,2,2-trifluoroethane) was detected in soil gas samples in concentrations ranging from 1.2 µg/L to 9.3 µg/L. No VOCs were detected in any of the soil samples. | Current Status: • No further action is warranted. |
No public health hazard is associated with this site. Contaminants were present at levels that do not pose a public health hazard. |
| AOC 32. Building 741. |
Dry cleaning plant and electronics overhaul shop constructed in the mid-1940s and removed in the late 1960s or early 1970s. No records are available on the hazardous waste materials stored, used, or disposed of at this facility. | Soil gas samples were collected; no VOCs were detected. | Current Status: • No further action is warranted. |
No public health hazard is associated with this site. No contaminants were detected during sampling events. |
| AOC 33. Building 747. |
One of the primary industrial facilities on Norton AFB. The building was constructed in 1942, and renovated in 1944, 1953, and 1955. From 1942 to 1966, the building became an engine overhaul facility. In 1966-1967, Building 747 was used as a freight terminal facility; portions of the building served as offices and storage facilities. | Sludge sample from the suspected sump exhibited moderately high fuel contamination with associated high detection limits for VOCs and SVOCs; metals (particularly arsenic 3.2 ppm) exceeded industrial TCGs. The south-central position of Building 747, the alley between Buildings 747 and 749, and the northwestern portion indicate 1,2-dichlorobenzene (DCB) (4.3 ppm in 3 out of 175 samples, 1,4-DCB (0.86 ppm in 3 out of 173 samples) and chlorobenzene (1.0 ppm in 3 out of 192 samples) above TCGs in the shallow subsurface. Sampling indicates that contamination is not vertically widespread. | Current Status: • Building currently used for commercial purposes for warehousing. • AOC 33 will remain paved and building will be left in place. This property will be deed restricted for industrial/commercial activities only. • Final EE/CA issued July 1, 1997. Action Memorandum stating No Further Action was distributed June 30, 1997. |
No public health hazards are associated with this site. No past exposures occurred because all contamination was limited to the subsurface. Current exposure hazards do not exist because contamination is located below a paved access way and Building 747. Future exposure will not occur because the building and the paved access way are to remain on site; the site will be deed restricted to prevent any future exposure. |
| AOC 34. Building 749. |
Maintenance facility operating from 1944 to the mid-1960s. Two waste fuel USTs were located on site, but have since been removed; two waste tanks are also on site. This building was most recently used as a warehouse by the Civil Engineering department as an aircraft latrine services facility. | No VOCs were detected in the soil gas samples. No VOCs, SVOC, or metals above background were detected in subsurface soil samples. Diesel was reported at a concentration of 3.9 ppm. Nitrates were reported at a range of 18.4 to 35.4 ppm. | Current Status: • UST sites have been remediated and closed. • No further action warranted. |
No public health hazard is associated with this site. Contaminants detected are below background or ATSDR comparison values. |
| AOC 35. Building 755. |
Blacksmith and foundry shop operating from the 1940s to the late 1960s or early 1970s. The building has since been removed. Silver-, magnesium-, chrome-, and dilute-plating operations were present in 1955. | TCE was detected in soil gas at concentrations ranging from 1.4 µg/L to 49.3 µg/L. Metals were detected at levels that exceed background concentrations for Norton AFB subsurface soils; however, levels are below industrial/commercial TCGs. TCE was also detected in soil samples at concentrations ranging from 1 ppb to 13 ppb (maximum concentration detected at 75 feet bgs). TCLP samples were found to contain concentrations of TCE below the industrial TCG for TCE. | Current Status: • No further action is warranted. |
No public health hazard is associated with this site. Contaminants were not detected at levels that are hazardous to human health. |
| AOC 36. Building 795. |
Aircraft maintenance hangar since 1942. Washrack area used for washing aircraft that allegedly contained radionuclides (area includes storm drains and drainage ditches). | Soils (VOCs): Only one of the 17 soil
gas samples detected VOCs: TCE was detected at a concentration of 0.21 µg/L
in the primary sample and 0.37 µg/L in a duplicate sample. Fuels were not
detected in this subsurface soil sample. Soils (Radionuclides): Soil, trench drain sump, and drain swipe samples collected. No radiation present except cesium-137 [0.01 to 0.995 picoCuries per gram (pCi/g)]. |
Corrective Activities: • Radionuclide investigations including a geophysical survey. Current Status: |
No public health hazard is associated with this site. Contaminants were detected at levels below ATSDR comparison values. |
| AOC 37. Refuse dump area. |
Collection point for general refuse and debris. The area includes two roll-off dumpsters, a washing pad used to rinse street sweeper vehicles, and three drainage ditches. No records indicate what hazardous materials may have been disposed at this facility. Located near residential areas. | Investigations indicate the presence of fuels (total extractable hydrocarbons [THE] as diesel), PCBs, and SVOCs above TCGs in the surface, subsurface soil, and sediment samples from drainage areas at the site. PCBs detected in surface soil ranged from 0.014 ppm to 1.100 ppm; diesel was detected at levels from 0.002 to 0.063 ppm. No VOCs were detected in soil gas, surface and subsurface soil, or sediment samples. | Corrective Activities: • Excavation of soils on site that contain contaminants of concern above residential TCGs; soils were transported to IRP Site 2 landfill for reuse as material for the final landfill cover system. • Confirmatory sampling was performed. • Excavated areas were backfilled with clean soil, and the site was restored. Current Status: |
No public health hazard is associated with this site. No contaminants were detected at levels that pose a public health hazard. Future exposure to contamination will not occur because soils have been remediated to levels that do not pose a human health hazard. |
| AOC 38. C Street storm drain outfall. |
End point for storm drain lines originating in the northern central base area and portions of the flight line where hazardous materials were once used. The storm drain lines empty into an open concrete spillway, which then empties into a dirt drainage channel. Waste spilled along the northern flight line area (e.g., fuels, hydraulic oils) and waste spilled or disposed in drains at many of the maintenance facilities located in the CBA may have taken place on site. | Sampling results indicate the presence of PCBs, fuels (i.e., THE as diesel), metals, and SVOCs above residential soil TCGs in surface and subsurface soil, and in sediment samples from storm drains at the site. | Corrective Activities: • Excavation of soils on site that contain contaminants of concern above residential TCGs; soils were transported to IRP Site 2 landfill for reuse as material for the final landfill cover system. • Confirmatory sampling was performed. • Excavated areas were backfilled with clean soil, and the site was restored. Current Status: |
No public health hazard is associated with this site. No contaminants were detected at levels that pose a public health hazard. Future exposure to contamination will not occur because soils have been remediated to levels that do not pose a human health hazard. |
| AOC 39. Golf Course and storm drain outfall area. |
The accumulation point for storm drain lines, originating along the southern flight line area, being discharged into an open grass and dirt drainage ditch. This discharge point received potential waste from the flight line, as well as from maintenance hangars 695, 763, and 795. | Soil sampling events indicate the presence of VOCs, SVOCs, fuels (i.e., THE as diesel), PCBs, and metals in the surface to 1 ft bgs; however, levels do not exceed the industrial TCGs. Benzo(a)pyrene and benzo(k)fluoranthene were infrequently detected above industrial soil TCGs in the subsurface. Contamination is not vertically widespread. | Current Status: • There are no plans to remove or alter the drainage channel. • Deed restrictions will be placed on AOC 39 to prevent future land use for residential purposes. • Final EE/CA issued July 1, 1997. Action memorandum stating No Further Action was distributed June 30, 1997. |
No public health hazard is associated with this site. No past human health hazard is associated with this site because contamination is present only in the subsurface. No current or future exposure exists because the drainage channel is not being removed; no land use alterations will disturb contaminated soils. Deed restrictions will further prevent future human health exposures. |
| AOC 40. Golf course maintenance area. |
Land used by the golf course maintenance group to store and mix a variety of pesticides, herbicides, and fungicides. Spills of fungicides and arsenic-based chemicals reportedly occurred from decaying containers and improper storage. Also reports of waste oil disposal on site. | Soil sampling indicates localized and scattered detections of PCBs, fuels (i.e., THE as diesel), pesticides (chlordane), and metals (arsenic) in the shallow subsurface soils above TCG concentrations. | Current Status: • Land will serve as the Palm Meadows golf course fairway extension. • Deed restrictions are to be placed on this site. • Final EE/CA issued July 1, 1997. Action Memorandum stating No Further Action was distributed June 30, 1997. |
No public health hazard is associated with this site. No past exposures exist because contamination is limited to the subsurface. Access to the site is currently restricted to the general public; no current health hazards exist. Deed restrictions will further prevent future human health exposures. |
| AOC 41 | Lockheed soil excavation treatment cell. | No VOCs were detected in subsurface soil samples. | Current Status: • No further action warranted. |
No public health hazard is associated with this site. No contaminants were detected during sampling events. |
| AOC 42. Building 514. |
Chemical storage area constructed in the mid-1950s. | 1,1,1-TCA was detected in soil gas in concentrations ranging from 0.008 µg/L to 2.0 µg/L. No SVOCs were detected at levels exceeding ATSDR comparison values. | Current Status: • No further action warranted. |
No health hazard is associated with this site. Contamination present at levels that do not pose a public health hazard. |
| AOC 43. Building 763/Dock 4. Located in IRP Site 9 area. |
Buried sumps covered by a new floor.
Building 763 South Apron Area alleged to have been the area where planes with radioactivity were washed. Area investigated with building 795. |
Soil (TCE): Fuels (diesel or gasoline)
were not detected in any of the soil samples analyzed. TCE was detected
in only one sample at 17 ppb.
Soil (Radionuclides): See AOC 36; Building 763 investigated in conjunction with Building 795. |
Corrective Activities: • Radionuclide investigations on site, including a geophysical survey. Current Status: |
See IRP site 9 for TCE status. See AOC 36 for status of radionuclides. |
| AOC 44. Golf Course ash layer. |
The golf course was constructed in the early 1960s. It is believed that trees and brush were removed and burned in this area during preparation for landscaping of the new golf course. | No elevated levels of metals were detected in soil samples. | Current Status: • Final EE/CA issued November 14, 1996. Action Memorandum stating No Further Action was distributed October 7, 1997. |
No public health hazard is associated with this site. No contaminants were detected during sampling events. |
| AOC 45. 500 Series Buildings. |
These buildings have been mainly used as supply and depot warehouses and administrative offices. There is little historical information indicating that these buildings were used for the disposal of hazardous materials. (2) | No VOCs of concern were detected in soil gas samples. | Current Status: • No further investigations or actions are warranted. |
No public health hazard is associated with this site. No contaminants were detected during sampling events. |
| AOC 46. 900 Series Buildings.
|
The 900 series buildings were used for supply and depot warehouses and administrative offices. (3) | Soil gas samples indicate 1,1,1-TCA at five different points in the area of Building 939 and Freon was reported in 15 samples. No VOCs, PCBs, or metals above background concentrations were detected in subsurface soil samples. | Corrective Activities: • DRMO has been closed under RCRA regulations. Current Status: |
No public health hazard is present. Contaminants are present at levels that do not pose a human health hazard. |
| AOC 47. Detachment 10/Ballistic Missile Organization (BMO). |
BMO area debris site. Buildings composing the BMO complex were constructed in the 1950s. BMO property was transferred from the Air Force to the County of San Bernardino in 1974 and used by the county for county agencies including Data Processing, Central Planning, Schools Administration, Office Management, and Environmental Services. The property was reacquired by the Air Force in 1982. The former BMO facility is currently the site of the Defense Finance and Accounting Service office. |
No fuel-related VOCs were detected in soil gas. Subsurface soil sampling indicated no VOCs or SVOCs present. | Corrective Activities: • One UST was removed from an area just west of Building 950 in 1992. Current Status: |
No public health hazard is associated with this site. No contaminants were detected during sampling events. |
| AOC 48. Former Communications Facility. |
Property used as a radio communications facility from 1957 until 1966 when it was decommissioned. No historical records for this facility were located. | No VOCs detected in the soil gas samples. No detections of chemicals indicative of fuel or solvent contamination were detected in soil samples. | Corrective Activities: • Geophysical survey was performed to identify the presence of an UST. No UST was detected; however, a buried cable, part of the former facility's communication system, was identified. The Air Force plans on leaving the cable in place. Current Status: |
No public health hazard is associated with this site. No contaminants were detected during sampling events. |
| AOC 49. Building 248-- Satellite Waste Accumulation Point (SWAP) Area. |
Site used as a radar installation facility for computer tracking and early warning detection of aircraft and missiles from 1958 to 1968, at which time the facility housed AAVS (Aerospace Audiovisual Services). AAVS operations included the use, storage, and disposal of solvents, paints, cyanide, potassium and sodium thiosulfate, and other film-developing related chemicals. | Cyanide was not detected in the soil sampling. The surface soil pH was 5.8, lower than the past soil results between 7.0 and 8.0, but not out of range for typical soil material. | Current Status: • No further investigations or actions are warranted. |
No public health hazard is associated with this site. No contaminants were detected during sampling events. |
| AOC 50. Building 329--SWAP area. |
A small metal shed, positioned on a cement pad, that stored oil, antifreeze, and soap in drums; oil and fuel filters; paint shop oil and grease rags; paint cans, contaminated absorbent; contaminated fuel; and non-rechargeable batteries. | No VOCs were detected in soil gas samples. No PCBs, VOCs, SVOCs, or metals were detected above background concentrations in soil samples. | Current Status: • No further investigations or actions are warranted. |
No public health hazard is associated with this site. No contaminants were detected during sampling events. |
| AOC 51. Building 333--SWAP area. Building 333 was investigated as AOC 9 under the 1994 Confirmation Study field program. |
Building 333 was used as an aircraft maintenance hangar from the early 1940s to 1963, prior to conversion into an automotive maintenance facility. Most recently, this site was used for the maintenance of special purpose trucks. Waste oil generated at this building was disposed of into a UST. This SWAP was also the storage place for contaminated fuel, antifreeze, waste paint, batteries, oil filters, and rags in drums. Also included on this site is a Safety-Kleen solvent tank and a flammable storage locker storing oils, greases, and brake fluid. | No fuel-related VOCs were detected in soil gas samples. No PCBs, VOCs, SVOCs, or metals above the background concentrations for Norton AFB were detected in soil samples. | Current Status: • No further investigations or actions are warranted. |
No public health hazard is associated with this site. No contaminants were detected during sampling events. |
| AOC 52. Building 341--SWAP area. |
An aircraft maintenance hangar from the early 1940s to the mid-1960s, at which time it was converted into an automotive maintenance facility. The building was most recently used for the maintenance of general purpose vehicles. Antifreeze, motor oil, transmission fluid, brake fluid, R12 Freon, waste oil, and waste antifreeze were disposed of on this site. | No fuel-related VOCs were detected in soil gas samples. No PCBs, VOCs, SVOCs, or metals above background concentrations for Norton AFB were detected in soil samples. | Current Status: • No further investigations or actions are warranted. |
No public health hazard is associated with this site. No contaminants were detected during sampling events. |
| AOC 53. Building 403--SWAP area. |
Carpenter and paint shop from the 1940s to the 1990s. Mineral oils, PCBs, Freon, latex paint, and oil filters were stored in drums on this site. | No VOCs were detected in soil gas samples. No VOCs, SVOCs, and PCBs, or metals above background concentrations were detected in soil samples. | Current Status: • No further investigations or actions are warranted. |
No public health hazard is associated with this site. No contaminants were detected during sampling events. |
| AOC 54. Building 407--SWAP area. |
Liquid fuels equipment maintenance area where wastes stored in drums, rags, JP-4 aviation fuel, diesel, gasoline, grease, and oil were stored. | No VOCs were detected in the soil gas samples. No VOCs, SVOCs (including Freon), or metals above background concentrations were detected in soil samples. | Current Status: • No further investigations or actions are warranted. |
No public health hazard is associated with this site. No contaminants were detected during sampling events. |
| AOC 55. Building 412--SWAP area. |
This building has been used since the 1940s as a storage facility for paints and other related materials and as a maintenance facility. Over 267 materials were once stored at this location; materials include paints, acids, oils, grease, lighter fluid, lubricating oil, hydraulic oil, and waterproofing sealers. | No VOCs were detected in soil gas samples. PCE is the only VOC that was detected in soil gas (0.84 µg/L to 1.7 µg/L) and in soil samples (8 ppb). No SVOCs, PCBs, or metals above background concentrations were detected in soil samples. | Current Status: • No further investigations or actions are warranted. |
No public health hazard is associated with this site. Contaminants detected were below background levels or ATSDR comparison values. |
| AOC 56. Building 417--SWAP area. |
Waste stored in this building included Penetron, waste oil, absorbent, and batteries. | No VOCs were detected in the soil gas samples collected. No SVOCs, VOCs, or metals above background concentrations were reported in soil samples. | Current Status: • No further investigations or actions are warranted. |
No public health hazard is associated with this site. No contaminants were detected during sampling events. |
| AOC 57. Building 427--SWAP area. |
Diesel locomotive shed and fuel storage facility. Wastes stored in drums at this location include mineral oil and PCBs. | No VOCs, SVOCs, PCBs, or metals were detected in soil samples. | Current Status: • No further investigations or actions are warranted. |
No public health hazard is associated with this site. No contaminants were detected during sampling events. |
| AOC 58. Building 468--SWAP area. |
A shed located outside of building 468 used to store cylinders containing compressed nitrogen gas, hydraulic fluid, and spray wax. | No VOCs were detected in any of the soil gas samples. There were no VOCs, SVOCs, or PCBs detected in soil samples. Fuel-related compound detections were indicated by the presence of volatile hydrocarbons and extractable fuel hydrocarbon in soil samples. Subsequent sampling indicates that fuel-related contamination appears to be limited in distribution. | Corrective Activities: • 1992: UST associated with Building 477 was removed. The location of the former tank is unknown. Current Status: |
No public health hazard is associated with this site. Contamination is limited and not present at levels that affect human health. |
| AOC 59. Building 620--SWAP area. |
A former civilian service station. Five USTs, one waste oil UST, an oil-water separator connected to the waste oil tank, seven fueling islands (fuel pumps), a vehicle service area, and a vehicle washing slab are associated with this area. Wastes stored within the building included solvents, used and drained oil filters, and used antifreeze. | No VOCs of concern were detected in soil gas samples. No VOC, SVOCs, or metals were detected above background concentrations in soil samples. | Current Status: • No further investigations or actions are warranted. |
No public health hazard is associated with this site. No contaminants were detected during sampling events. |
| AOC 60. Building 675--SWAP area. Located in vicinity of an identified TCE source (Building 673 parking lot area). |
Constructed in 1978 as the new aircraft ground equipment (AGE) facility, which replaced the old AGE facility (Building 670). Light maintenance of ground equipment was performed at this site. Materials stored at this location include hydraulic fluid, Pensolve solvent, paint waste, JP-4 fuel, diesel fuel, fuel filters, oil filters, antifreeze, and engine oil. | Some VOCs were detected in soil gas, but results indicate that this specific AOC is not the source of contamination. VOCs detected in soil samples at this location include TCE (depth of 89.5 ft bgs), ethylbenzene (8 ppb in one sample), and xylene (6 ppb to 240 ppb); maximum contamination is located at 45 feet bgs. SVOCs, naphthalene (maximum contamination of 16,000 ppb) and 2-methylnaphalene (5,500 ppb) were detected in soils from 40 to 105 feet bgs. No metals exceeded background concentrations. | Corrective Activities: • October 1995: SVE system installed north of site to mitigate TCE migration. Current Status: |
No public health hazards exist on site. No past exposures occurred because all contamination was limited to the subsurface. Current and future health hazards do not exist on this site because TCE in soils have been remediated. TCE migration to site is unlikely due to the active SVE remedy performed at the Building 673 source location. |
| AOC 61. Building 680--SWAP area. |
Building used by the Norton AFB fire department; materials stored in this location included household cleaning products, copier developer, transmission fluid, lubricant oil, and contaminated absorbent containing waste oil, hydraulic fluid, diesel, and unleaded gasoline. | TCE was detected in soil gas samples. No VOCs and SVOCs were reported in soil samples. | Current Status: • No further investigations or actions are warranted. |
No public health hazard is associated with this site. Contaminants were detected at concentrations that do not pose a public health hazard. |
| AOC 62. Building 825--SWAP area. | A metal shed, reportedly used to store herbicides for golf course operations. | No pesticide-, PCB-, or cyanide-compound concentrations identified above detection limits. Low levels of herbicide compounds were reported; however, none of the chemicals exceed the preliminary remediation goals established by EPA Region IX. | Current Status: • No further action is warranted. |
No public health hazard is associated with this site. Contaminants were detected at concentrations that do not pose a health hazard. |
| AOC 63. Building 950--SWAP area. |
Three storage structures outside of Building 950 were used to store adhesives, lubricants, paints, refrigerants, waste Freon, dead batteries, spent solvent, and waste oil. | No VOCs were detected in any of the soil gas samples. VOCs, SVOCs, PCBs, or metals were not detected above background levels in any of the soil samples. | Current Status: • No further investigations or actions are warranted. |
No public health hazard is associated with this site. No contaminants were detected during sampling events. |
| AOC 64. Building 976--SWAP area. |
Entomology shop where insecticides and herbicides were stored. The pesticides were primarily stored on a concrete floor in aerosol cans, jugs, and bags. | Low levels of some pesticides were detected in soil samples; the highest concentration was 4,4'-DDT at 1.4 ppb. Arsenic (0.4 to 2.1 ppm, except one sample directly below concrete at 19 ppm), zinc (190 ppm), and lead (360 ppm) were also detected at slightly elevated levels in one of 31 samples. Metal levels appear to be highly localized and not related to waste disposal practices at this AOC. Elevated metals concentrations were not detected in concrete core samples analyzed from the floors of the building at this AOC. The only SVOC detected in soil samples was fluoranthene. | Current Status: • No further investigations or actions. |
No public health hazard is associated with this site. Contaminants were present at levels that do not pose public health hazards. |
| AOC 65. Delta 7--SWAP area. |
One shed was used to store materials such as hydraulic fluid, engine oil, grease, and flammable materials. The other shed was used to store waste engine oil, waste hydraulic fluid, crushed cans, used batteries, and other materials. | No VOCs were reported for any of the soil gas samples. No VOCs, SVOCs, PCBs, or metals were detected above background concentrations in soil samples. | Current Status: • No further investigations or actions are warranted. |
No public health hazard is associated with this site. No contaminants were detected during sampling events. |
| AOC 66. Gate 10--SWAP area. |
A fenced enclosure once used to store wastes generated from the power production shop. Filters containing gasoline, oil, and antifreeze were stored on this site in an open-top drum, which was placed on a concrete apron. | PCE was detected in soil gas sampling. No VOCs, SVOCs, PCBs, or metals were detected above background concentrations in soil samples. | Current Status: • No further investigations or actions are warranted. |
No public health hazard is associated with this site. No contaminants were detected during sampling events. |
| AOC 67. Gasoline Dump Pits near Building 763. |
Four gasoline dump pits; identified from a 1944 aerial photograph. | The only VOC detected in soil gas samples was TCE at levels of 0.484 µg/L. VOCs detected in the soil samples include TCE, 1,2-DCE, carbon tetrachloride, acetone, and toluene (0.023 ppm to 0.200 ppm); TCE was detected most frequently (0.023 ppm to 0.250 ppm). | Current Status: • No further action is warranted. |
No public health hazard is associated with this site. Contaminants present at levels that do not pose public health hazards. |
| AOC 68. Building 620. |
A former civilian service station that included two USTs, an oil-water separator, seven fueling islands, a vehicle service area, and a vehicle washing slab. Solvent, used and drained oil filters, and used antifreeze were stored on site. | No VOCs were detected in soil gas samples. No VOCs, SVOCs, or metals above background were detected in soil samples. | Current Status: • No further action is warranted. |
No public health hazard is associated with this site. No contaminants were detected during sampling events. |
| AOC 69. Chemical warfare training area. |
Chemical warfare training was conducted from 1944 to 1945 on this site. The types and volumes of chemicals used during training are not known. Aerial photographs also indicate the use of drums at the edge of the training area. Use of the drums has not been identified. | Only two chemicals, diisopropylmethylphosphonate (DIMP) and dimethylmethylphosphonate (DMMP), were detected in soil samples; levels were below the EPA Region IX preliminary remediation goal. | Current Status: • No further action is warranted. |
No public health hazards are associated with this site. Contaminants were detected at levels that do not pose a health hazard. |
| AOC 70. IWTP effluent percolation pond. |
Pond site constructed upon sandy soils readily facilitating infiltration of the treated effluent into the subsurface. This pond was in use during the mid-1980s to 1993 for the disposal of treated IWTP effluent. The pond dried out when the IWTP ceased functioning in mid-1993. | VOCs and cyanide were not detected in soil samples. Metals were detected in surface soil samples (arsenic at 1.9 ppm; beryllium at 0.65 ppm and 0.67 ppm; selenium at 1.3 ppm; and silver in five samples with a maximum concentration of 5.5 ppm). Several PAHs were reported in soils. 4,4'-DDT and PCB, at a range of 190 ppb to 1100 ppb in 9 out of 11 samples, were also detected in soil sampling. Cesium-137, potassium-40, radium-226/228, and gross alpha and gross beta were detected within the background range established for Norton AFB. | Corrective Activities: • Excavation of contaminated soils to a depth of 6 or 7 feet bgs; soils reused for landfill cap foundation at IRP Site 2. Current Status: |
No public health hazards are associated with this site. Possible past exposures (trespassers?) were infrequent, unlikely, and not expected to pose a public health hazard. Current and future exposure to contamination will not pose a public health hazard because contaminated soils have been removed. |
| AOC 71. Building 658. |
IRP Site 9 air ducts. Building suspected to have been the area where radioactive planes were washed. | See IRP Site 9 for TCE; see AOC 24 for status on radionuclides. | See IRP Site 9 and AOC 24. | See IRP Site 9 for TCE status; see AOC 24 for radionuclide status. |
| AOC 72. Aircraft refueling vehicle wash pad and parking area. |
An area for aircraft refueling and washpad; area is completely paved with concrete and/or asphalt. Discoloration of the concrete typical of a fuel spill was observed at this area. | VOCs were not detected in any of the soil gas samples. | Current Status: • No further actions are warranted. |
No public health hazard is associated with this site. No contaminants were detected during sampling events. |
| AOC 73. | Explosive ordnance disposal training facility. | No metallic debris indicative of unexploded ordnance items or explosive materials were found during surface or subsurface investigations. | Corrective Activities: • Surface brush and approximately 7,000 cubic yards of soil and asphalt removed to perform a magnetometer surface investigation. • All surface metallic debris removed. • Subsurface surveys were performed; anomalies detected were removed. Current Status: |
No public health hazard is associated with this site. No contaminants were detected at levels that pose a human health hazard. |
For a complete list of abbreviations, see page v.
[Sources: ATSDR, 1995a, 1995b, 1996, 1997a, 1997b ; Bechtel Environmental, Inc., 1997; Bennett, C.B., 1981; California Department of Toxic Substance Control, 1995; CDM, 1992, 1993, 1994, 1995a-e, 1996a-c, 1997a, 1997b; Defense Environmental Response Task Force, 1995; Earth Tech, 1994a, 1994b, 1995a, 1995b, 1996, 1997d; Ecology and Environment, Inc., 1987a, 1987b, 1988; ESI, 1982; Hazardous Waste Remedial Action Program, 1995, 1996a-g, 1997a-c; IT Corporation, 1995, 1996a, 1996b, 1997a, 1997b; Morrison Knudsen Corporation, 1996; Norton AFB, Installation Restoration Program Brochures, 1994a, 1994b, 1995a, 1995b, 1996a-e, 1997; Ogden Environment and Energy Services Co., Inc., 1997; Taylor, 1994; US Air Force, 1993a, 1993b, 1995a-e, 1996a-f, 1997a, 1997b; Wade et al., 1994; Weston Designers/Consultants, 1985.]
1. Electroplating batch tanks operated over an earthen floor until the floor was covered with concrete, permitting the spilled materials direct access into the soil.
2. Exceptions to the above statements are as follows: (1) Building 505, used as a chemical warehouse in the 1950s, was converted to administrative offices in 1962 and used for this purpose until 1993. (2) Building 514 was used as a chemical storage waterhouse from the mid-1950s to 1993. (3) Building 575 was used as a paint, oil, and dope storage facility during the 1940s and 1950s. Building converted to a commissary by 1963. Building used as a troop support storage facility during the summer of 1993. (4) Buildings 576 and 578 were constructed in 1943 as an automotive repair shop and washrack facility.
3. Two exceptions to the above are: (1) Buildings 992/942/945 were established in 1968 to repair Titan missiles with the use of small quantities of chemicals. No industrial waste drums, sumps, or USTs are incorporated with these buildings. (2) Building 948/DRMO was used as the primary facility for the temporary storage of hazardous waste.
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