PUBLIC HEALTH ASSESSMENT

MCCLELLAN AIR FORCE BASE
SACRAMENTO, SACRAMENTO COUNTY, CALIFORNIA


APPENDIX A: LIST OF SITES

ID DESCRIPTION LOCATION IDENTIFIED/ POTENTIAL CONTAMINANTS
OPERABLE UNIT A
CS 24 Landfill E of Bldg. 621 Priority pollutants
CS 34 Waste solvent storage tanks E of Bldg. 640 Priority pollutants
CS 37 Landfill Adj. to taxiway 7165 Solvents, oil/grease
CS 38 Underground tanks/sludge landfill Bldg. 475 Solvents, priority pollutants, metals
CS 40 Industrial wastewater sludge NE of Sanitary WTP Solvents
CS B-5 Landfill S of Bldg. 375 Solvents, petroleum products
CS P-5 Open ditch N of Bldg. 475 Solvents, other
CS P-6 Open ditch N of Bldg. 475 Solvents, other
CS S-7 IWTP #3 NE of Bldg. 475 Solvents, other
CS S-21 Degreaser/spray booths In Bldg. 351 Solvents, petroleum products
CS S-24 Depaint washrack At Bldg. 375 Solvents, petroleum products
CS S-26 Maintenance shop/spray booth Bldg. 473 Solvents, petroleum products
CS S-27 Solvent recovery stills Bldg. 478 Solvents
CS T-12 Waste oil/solvent tank Bldg. 342 Solvents
CS T-16 Tank farm N of Bldg. 475 Solvents, petroleum products
CS T-17 Tank farm S of Bldg. 350 Solvents, petroleum products
CS T-20 Tank farm W of Bldg. 475 Solvents, petroleum products
CS T-21 Underground solvent tank W of Bldg. 342 Solvents, petroleum products
CS T-30 Underground solvent tank S of Bldg. 252 Solvents
CS T-36 500-gallon Stoddard solvent tank Near Bldg. 329 Solvents
CS T-37 Stoddard solvent tank S of Bldg. 360 Solvents
CS T-47 Oil/water separator E of Bldg. 346A Petroleum products
CS T-57 IWL drain at Bldg. 431 W of Bldg. 431 Priority pollutants
CS T-59 Underground storage tank Near Bldg. 340 Petroleum products
CS T-61 Underground storage tank Bldg. 614 Gasoline
PRL 25 Landfill S end of N/S runway None detected
PRL L-2 Industrial wastewater line Area A1 Priority pollutants
PRL L-3 Industrial wastewater line Area A2 Priority pollutants
PRL L-4 Industrial wastewater line Area A2 Priority pollutants
PRL P-3 Oil pit S of Bldg. 251 Solvents, petroleum products
PRL P-4 Sump E of Bldg. 351 Solvents, petroleum products
PRL P-8 Acid and cyanide pit S end of N/S runway Acid, metals
PRL S-1 Plating shop In Bldg. 343 Solvents, metals, cyanide
PRL S-2 Chemical warehouse In Bldg. 447 Solvents
PRL S-3 Acid storage warehouse W of Bldg. 447 Acids
PRL S-4 Treatment plant/sludge beds N of Bldg. 431 Solvents, metals, petroleum products
PRL S-6 IWTP #1 E of Bldg. 346 Solvents, metals
PRL S-9 Asbestos storage E of Bldg. 642 Asbestos
PRL S-14 Paint shop/spray booths Bldg. 22 Solvents, petroleum products
PRL S-16 Solvents/paint spray booths Bldg. 250 Solvents, petroleum products
PRL S-17 Repair shop/spray booths Bldg. 251 Solvents, petroleum products
PRL S-18 Repair shop/cleaning shop Bldg. 252 Solvents, petroleum products
PRL S-19 Entomology storage area NE of Sanitary WTP Pesticides
PRL S-20 Photo lab Bldg. 336 Solvents, metals
PRL S-22 Repair shop/spray booths In Bldg. 355 Solvents, petroleum products
PRL S-25 Transformer shop Bldg. 440 PCBs, solvents, petroleum products
PRL S-36 Oil drum storage N of Bldg. 410 Solvents, petroleum products
PRL S-37 Oil drum storage N of Bldg. 410 Solvents, petroleum products
PRL S-38 Drum storage N of Bldg. 431 Solvents
PRL T-6 Underground solvent tank Bldg. 640 Solvents
PRL T-7 Solvent pit/waste thinner tank Bldg. 640 Solvents
PRL T-10 Solvent tank Bldg. 362 Solvents
PRL T-15 Tank farm N of Bldg. 447 Solvents, petroleum products
PRL T-18 Tank farm E of Bldg. 343 Solvents, petroleum products
PRL T-19 Tank farm E of Bldg. 344 Solvents, petroleum products
SA 35 Underground storage tank   Potential contaminant source
SA 37 Motor pool   Potential contaminant source
SA 38 Fuel lines, USTs, and gas pumps   Potential contaminant source
SA 40 Electrical shop   Potential contaminant source
SA 41 Metal fabrication processes   Potential contaminant source
SA 43 Waste oil or jet fuel   Potential contaminant source
SA 44 Sump and bowser   Potential contaminant source
SA 45 Soil contamination   Additional data needed to characterize
SA 46 Underground storage tank   Potential contaminant source
SA 47 Soil contamination   Additional data needed to characterize
SA 48 Underground storage tank   Potential contaminant source
SA 49 Underground storage tank   Potential contaminant source
SA 52 Underground storage tanks   Potential contaminant source
SA 53 Washrack   Potential contaminant source
SA 54 Aboveground storage tank, pipeline   Potential contaminant source
SA 55 Laboratory waste spills on soil   Potential contaminant source
SA 56 Wastewater flowed onto soil   Potential contaminant source
SA 58 Chemical storage and treatment   Potential contaminant source
SA 59 Underground storage tank   Potential contaminant source
SA 60 Industrial wastewater drain and washrack   Potential contaminant sources
SA 61 Solvent spray booth   Potential contaminant source
SA 64 Chemical handling may have resulted in   Potential contaminant source
SA 65 IWL may have leaked   Potential contaminant source
SA 66 Motor pool operations   Potential contaminant source
SA 67 Contamination detected in soil   Additional data needed to characterize
SA 68 Spills on cracked concrete foundation   Potential contaminant source
SA 69 Abandoned UST, sumps, and IWL   Potential contaminant sources
SA 70 IWL or hydraulic pump unit   Potential contaminant sources
SA 71 Hazardous material storage   Potential contaminant source
SA 73 Sump may have leaked   Potential contaminant source
SA 74 Underground storage tank   Potential contaminant source
SA 75 IWL may have leaked   Potential contaminant source
SA 76 Hazardous materials stored at lot   Potential contaminant source
SA 77 Aboveground storage tanks   Potential contaminant source
SA 78 Locomotive washrack and UST   Potential contaminant sources
SA 79 Former underground storage tanks   Potential contaminant source
SA 80 Soil contamination from spill   Additional data needed to characterize
SA 81 Fuel lines   Potential contaminant source
SA 84 Paint spray booth drains   Potential contaminant source
SA 85 Sump and underground wastelines   Potential contaminant source
SA 86 Underground storage tanks and sump   Potential contaminant source
SA 87 Former underground storage tanks or IWL   Potential contaminant source
SA 88 Contamination detected in soil   Additional data needed to characterize
SA 89 Former material storage and handling area   Potential contaminant source
SA 90 Washrack and hazardous storage activities   Potential contaminant source
SA 91 Contaminants detected in soil   Additional data needed to characterize
SA 93 Laboratory radionuclide contamination   Potential contaminant source
SA 94 Underground fuel lines   Potential contaminant source
SA 95 Underground storage tank   Potential contaminant source
SA 96 Underground sump and tanks   Potential contaminant source
SA 97 Contaminated washwater   Potential contaminant source
SA 98 Indoor storage area and spray booths   Potential contaminant source
SA 99 Underground storage tanks   Potential contaminant source
SA 100 UST and former disposal pit   Potential contaminant sources
SA 101 Sump   Potential contaminant source
SA 103 Contamination detected in soil   Additional data needed to characterize
SA 105 Former laboratory activities   Potential contaminant source
SA 106 Underground storage tank   Potential contaminant source
SA 107 Contaminants detected in soil   Additional data needed to characterize
SA 108 Oils, hydraulic fluid, and jet fuel   Potential contaminant source
SA 109 Stream sediment contamination   Additional data needed to characterize
OPERABLE UNIT B
CS 23 Landfill Bldg. 781 Priority pollutants
CS 30 Radio/chem lab/landfill E of Bldg. 628 Solvents, metals
CS 31 Incinerator ash burial pit Near Bldg. 680 Arsenic
CS 36 Open storage area N of Bldg. 666 Solvents, cyanide
CS 47 Abandoned plating shop Bldg. 666 Solvents, metals
CS 48 Abandoned IWTP IWTP #4 Solvents, metals, oil/grease
PRL 29 Landfill NE of Bldg. 700 None detected
PRL L-5 Industrial wastewater line Area B2 Priority pollutants
PRL L-6 Industrial wastewater line Area B2 Priority pollutants
PRL P-2 Waste pond S of Bldg. 687 Solvents, petroleum products
PRL P-9 Open drainage ditch W of Bldg. 660 Solvents, metals
PRL S-13 Open storage Bldgs. 709, 727, 729 Solvents
PRL S-28 Oil/paint storage N of Bldg. 600 Oil/grease
PRL S-29 PCB storage In Bldg. 655 PCBs
PRL S-30 Depaint washrack Bldg. 658 Solvents, petroleum products
PRL S-33 Hazardous materials storage Bldg. 786 Solvents, other
PRL S-34 Degreaser/paint spray booth Bldg. 652 Solvents, other
PRL S-35 Solvent spray booth Bldg. 654 Solvents, other
PRL T-8 Fuel tank Bldg. 756 Solvents, petroleum products
PRL T-45 Oil/water separator N of Bldg. 74 Petroleum products
PRL T-46 Oil/water separator S of Bldg. 764 Petroleum products
PRL T-48 Oil/water separator S of Bldg. 765 Petroleum products
PRL T-60 Underground storage tank NW Bldg. 656 Petroleum products
SA 1 Freon waste reportedly dumped   Potential contaminant source
SA 2 Laboratory and outdoor radioactive storage   Potential contaminant sources
SA 3 Washrack   Suspected contaminant source
SA 4 Paints and solvents   Potential contaminant source
SA 5 Unable to conduct site visit.   Further investigation necessary
SA 6 Underground fuel storage tanks   Potential contaminant source
SA 7 Underground fuel storage tanks   Further investigation of USTs necessary
SA 8 Underground storage tanks   Potential contaminant source
SA 9 Contamination detected in soil   Additional data needed to characterize
SA 10 Concrete wastewater sump   Potential contaminant source
SA 11 Underground storage tank and piping   Potential contaminant source
SA 12 Contamination detected in soil   Additional data needed to characterize
SA 13 Open storage of hazardous materials   Suspected contaminant source
SA 14 Ditch transported wastewater   Suspected contaminant source
SA 15 Fire in a chemical storage area   Potential contaminant release
SA 16 Underground tanks and piping   Potential contaminant source
SA 17 Open storage of hazardous materials   Suspected contaminant source
SA 18 Open storage of hazardous materials   Suspected contaminant source
SA 19 Former spray booth   Suspected contaminant source
OPERABLE UNIT C
CS 7 Sludge/oil pit E of Bldg. 701 Priority pollutants, oil/grease, PCBs
CS 10 Landfill W of Bldg. 774 Priority pollutants, PCBs
CS 11 Landfill W of Bldg. 774 Priority pollutants
CS 12 Landfill SW of Bldg. 774 Priority pollutants
CS 13 Landfill W of Bldg. 774 Priority pollutants
CS 14 Landfill S of Bldg. 701 Priority pollutants
CS 22 Burn pit/landfill S of IWTP Aeration Basin Priority pollutants, PCBs, oil/grease
CS 42 Oil storage/landfill IWTP Aeration Basin Priority pollutants, oil/grease, PCBs
CS 43 Landfill NW of Bldg. 704 Priority pollutants
CS 52 Burn pit NW of Bldg. 704 Priority pollutants
CS 67 Landfill NW of Bldg. 702 Priority pollutants, petroleum products
CS 69 Burn pit SE of Bldg. 704 Priority pollutants
PRL 8 Sludge/refuse landfill NW of Bldg. 774 Solvents, priority pollutants
PRL 9 Landfill W of Bldg. 774 Priority pollutants
PRL 15 Sodium valve trench SW of Bldg. 774 None detected
PRL 16 Sodium valve trench S of Bldg. 701 None detected
PRL 17 Landfill SE of Bldg. 704 Solvents
PRL 18 Landfill SE of Bldg. 704 None detected
PRL 19 Landfill SE of Bldg. 704 None detected
PRL 20 Sludge/oil pit SE of Bldg. 704 Solvents
PRL 21 Sludge/oil pit SE of Bldg. 704 Solvents
PRL 28 Sludge pit W of IWTP Priority pollutants
PRL 32 Radio/hazardous waste storage S of IWTP Priority pollutants
PRL 41 Landfill Bldg. 704 Priority pollutants
PRL 49 Landfill NE of Bldg. 704 None detected
PRL 50 Settling pond NW of Bldg. 704 None detected
PRL 51 Holding pond NW of IWTP None detected
PRL 53 Settling pond NW of Bldg. 704 Solvents
PRL 54 Storage area S of Bldg. 704 None detected
PRL 55 Acid storage area/landfill S of Bldg. 704 Solvents
PRL 56 Storage area S of Bldg. 704 None detected
PRL 57 Landfill S of Bldg. 704 None detected
PRL 60 Holding pond S of IWTP None detected
PRL 61 Chemical waste pit E of Bldg. 722 None detected
PRL 62 Chemical waste pit E of Bldg. 722 None detected
PRL 63 Unlined ditch SE of Bldg. 704 None detected
PRL 64 Unlined ditch SE of Bldg. 704 None detected
PRL 65 Landfill E of Bldg. 692 None detected
PRL 66 Ditches and pond W of Bldg. 721 None detected
PRL 68 Sludge ponds W of Site 42 Priority pollutants
PRL L-7 Industrial wastewater line Area C2 Priority pollutants
PRL P-10 Magpie Creek N of Bldg. 783 Volatile organic compounds
PRL S-11 BCE/PCE storage Bldg. 636 PCBs, solvents, petroleum products
PRL S-31 Aircraft paint hangar Bldg. 692 Paints, solvents, petroleum products
PRL S-32 Paint storage area Bldg. 694 Paints, solvents, petroleum products
PRL S-46 Unknown N of Bldg. 774 Volatile organic compounds
PRL S-48 Unknown W of Bldg. 720 Volatile organic compounds
OPERABLE UNIT D
CS A Sludge disposal pit NW corner of base Solvents, priority pollutants, metals
CS S Fuel/solvent/oil burn pit NW corner of base Solvents, priority pollutants, petroleum products
CS T Fuel/solvent sludge pit NW corner of base Solvents, priority pollutants, metals, petroleum
CS 1 Landfill NW corner of base Priority pollutants
CS 2 Sludge/oil pit NW corner of base Priority pollutants
CS 3 Sludge/oil pit NW corner of base Priority pollutants
CS 4 Sludge/oil pit NW corner of base Priority pollutants
CS 5 Sludge/oil pit NW corner of base Priority pollutants
CS 6 Oil burn pit NW corner of base Solvents, metals
CS 26 Sludge/oil burn pit NW corner of base Solvents, metals
PRL 27 Sodium valve trench Bldg. 1085 None detected
PRL 33 IWTP sludge landfarm NW corner of base Solvents
PRL T-11 Underground storage tank Bldg. 1093 Solvents
OPERABLE UNITS D, E, G, H
PRL P-7 Open ditch NE to Area D Petroleum products, solvents
OPERABLE UNIT E
PRL 45 Paint waste landfill N end of base None detected
PRL S-10 Storage area NW of Bldg. 1086 Solvents, radiation
OPERABLE UNIT F
PRL B-6 Waste area N of N/S runway Unknown
OPERABLE UNIT G
PRL L-1 Industrial wastewater line Area G Priority pollutants
PRL S-42 Hobby shop/M&R washrack N of Bldg. 1439 Solvents, petroleum products
PRL S-43 Aircraft washrack NE corner of Mat V Solvents, petroleum products
PRL S-44 Aircraft maintenance area S of Bldg. 1071/Mat U Solvents, petroleum products
PRL T-31 Underground storage tank Near Bldg. 1028 Solvents
PRL T-32 Underground storage tank Near Bldg. 1023 Solvents
PRL T-33 Underground storage tank Near Bldg. 1021 Solvents
PRL T-44 Stoddard solvent tank NW of Bldg. 1048 Solvents
PRL T-62 Underground storage tank NE of Bldg. 1075 Volatile organic compounds
OPERABLE UNIT H
PRL B-7 Spoil area N of Bldg. 243 Unknown
PRL P-1 Drainage ditch/ponds W of Bldg. 878 Solvents, petroleum products
PRL S-8 Electroplating shop In Bldg. 243G Solvents, metals, cyanide
PRL S-15 Degreaser/spray booths Bldg. 243 Solvents, petroleum products
PRL S-39 New museum site Dudley Blvd./Palm St. Solvents
PRL S-40 Troop issue site NW of Bldg. 910 Unknown
PRL S-45 Aircraft maintenance area W of Bldg. 878 Solvents, petroleum products
PRL S-47 Unknown NE of Bldg. 943 Volatile organic compounds

CS = Confirmed Site
PRL = Potential Release Location
SA = Study Area
IWL = Industrial Wastewater Line
IWTP = Industrial Wastewater Treatment Plant
UST = Underground Storage Tank
Ref (3)


APPENDIX B: DEMOGRAPHICS

TABLE I. POPULATION DATA

  South Area North Area Impact Area Sacramento County
Total persons 4,847 1,757 6,604 1,041,219
Total area, square miles 1.33 2.83 4.16 965.69
Persons per square mile 3,640 621 1,588 1,078
% Male 48.0 52.1 49.1 48.9
% Female 52.0 47.9 50.9 51.1
% White 79.0 87.7 81.3 75.1
% Black 9.9 4.2 8.4 9.3
% American Indian, Eskimo, or Aleut 2.5 1.8 2.3 1.2
% Asian or Pacific Islander 2.7 3.0 2.8 9.3
% Other races 5.9 3.4 5.2 5.1
% Hispanic origin 12.4 10.3 11.8 11.7
% Under age 10 18.2 15.2 17.4 15.9
% Age 65 and older 11.5 12.0 11.6 10.6
Source: 1990 Census of Population and Housing, Summary Tape File 1 (California). Prepared by Bureau of the Census, Washington, DC, 1991


TABLE II. HOUSING DATA

  South Area North Area Impact Area Sacramento County
Households* 1,769 589 2,358 394,530
Persons per household 2.74 2.98 2.80 2.58
% Households owner-occupied 60.4 71.1 63.1 56.6
% Households renter-occupied 39.6 28.9 36.9 43.4
% Households mobile homes 11.9 3.2 9.8 3.1
% Persons in group quarters 0.0 0.0 0.0 2.1
Median value, owner-occupied households, $ 61,200 ~119,000 ~80,000 129,800
Median rent paid, renter-occupied households, $ 382 ~425 ~390 462

* A household is an occupied housing unit, but does not include group quarters such as military barracks, prisons, and college dormitories.

Source: 1990 Census of Population and Housing, Summary Tape File 1 (California). Prepared by Bureau of the Census, Washington, DC, 1991.


TABLE III. YEAR HOUSEHOLDER MOVED INTO CURRENT HOUSING UNIT
All Households (percent)
Year Occupied North Area South Area California
1989-90 26.8 24.1 25.6
1985-88 25.4 28.3 31.7
1980-84 9.4 12.0 13.1
1970-79 17.6 19.5 17.0
1960-69 10.6 6.7 7.3
Before 1960 10.2 9.4 5.4
Owner Occupied Households (percent)
Year Occupied North Area South Area California
1989-90 17.4 11.8 12.0
1985-88 23.0 21.2 28.2
1980-84 10.6 12.8 14.4
1970-79 21.9 28.7 24.4
1960-69 14.2 10.0 11.8
Before 1960 13.0 15.5 9.2
Renter Occupied Households (percent)
Year Occupied North Area South Area California
1989-90 49.9 42.8 42.7
1985-88 31.3 39.1 36.0
1980-84 6.4 10.8 11.4
1970-79 7.0 5.6 7.6
1960-69 1.9 1.7 1.6
Before 1960 3.5 0.0 0.7

Source: 1990 Census of Population and Housing, Summary Tape File 3 (California). Prepared by Bureau of the Census, Washington, DC, 1992.


APPENDIX C: HEALTH EVALUATION GUIDANCE

To link a site's human exposure potential with health effects that may occur under site-specific conditions, ATSDR estimates human exposure to site contaminants from ingestion and/or inhalation of different environmental media. The following relationship is used to determine the estimated exposure to the site contaminant:

ED = (C x IR x EF) / BW
ED = exposure dose (mg/kg/day)
C = contaminant concentration
IR = intake rate
EF = exposure factor
BW = body weight

ATSDR uses standard intake rates for ingestion of water and soil. The intake rate for drinking water is 2 L/day for adults and 1 L/day for children. For incidental ingestion of soil and sediment, the intake rate is 100 mg/day for adults, 500 mg/day for school age children, and 5000 mg/day for children with pica behavior (repeated ingestion of non-nutritive substances). The intake rate for inhalation is 23 m3/day for adults and 3.8 m3/day for children. Standard body weights for adults, school age children, and pre-school age children are 70 kg, 35 kg, and 10 kg, respectively. The maximum contaminant concentration detected in a specific medium at a site is used to determine the estimated exposure; use of the maximum concentration results in an evaluation that is most protective of human health. When unknown, the biological absorption from environmental media (soil, water, etc.) is assumed to be 100%. Some exposure may occur on an intermittent or irregular basis. For these kinds of exposures, an exposure factor can be calculated to average the exposure dose over the exposure interval.


mathematical equation

Cancer risk is evaluated using weight-of-evidence classifications of carcinogenicity and EPA's cancer slope factor. The slope factor is the cancer risk per unit of estimated exposure dose. The slope factor can be used to compare the relative potency of different chemical substances on the basis of estimated exposure does.

CANCER RISK = CHRONIC DAILY INTAKE (lifetime average dose) x CANCER SLOPE FACTOR

Where sufficient toxicologic information is available, ATSDR has derived minimal risk levels (MRLs) for inhalation and oral routes of entry at each duration of exposure (acute, intermediate, and chronic). These MRLs are not meant to support regulatory action; but to acquaint health professionals with exposure levels at which adverse health effects are not expected to occur in humans.

The most suitable endpoint for deriving a MRL is the no-observed-adverse-effect-level (NOAEL). The calculation is as follows:

MRL = NOAEL/UF
where: NOAEL = no-observed-adverse-effect-level
  UF = uncertainty factor

To derive an MRL, ATSDR generally selects the most sensitive endpoint (judgement of ATSDR) which represents the most sensitive human health effect for a given exposure route and duration. ATSDR cannot derive an MRL unless (quantitative or qualitative) is available for potential systemic, neurological, and developmental effects. ATSDR derives an MRL using the most sensitive species with the highest NOAEL that does not exceed any adverse effect levels. When a NOAEL is unavailable, a lowest-observed-adverse-effect-level (LOAEL) is used. Uncertainty factors (multiples of 10) are employed in the derivation of an MRL. Uncertainty factors are used for derivation from a LOAEL, human variability, and for interspecies variability. In deriving the MRL, these individual UFs are multiplied together. The concentration from the study is divided by the product of the UFs.

REFERENCES

Agency for Toxic Substances and Disease Registry. Public Health Assessment Guidance Manual. Atlanta: ATSDR, March 1992.

IRIS. 1992. Integrated Risk Information System (IRIS). Online Office of Health and Environmental Assessment, Environmental Criteria and Assessment Office, Cincinnati.

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