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PUBLIC HEALTH ASSESSMENT

ORDNANCE PRODUCTS, INCORPORATED
NORTHEAST, CECIL COUNTY, MARYLAND


APPENDIX A

TABLES


List of Tables
Table 1.On-Site Soil: AREA A1 - Surface (27) and Subsurface (2) Soil Sampling (ppm)
Table 2.On-Site Soil: AREA A2 - Surface (17) and Subsurface (1) Soil Sampling (ppm)
Table 3.On-Site Soil: AREA B - Surface (10) and Subsurface (2) Soil Sampling (ppm)
Table 4.On-Site Soil: AREA C - Surface (21) and Subsurface (2) Soil Sampling (ppm)
Table 5.On-Site Soil: AREA'S D and E - Surface (8) and Subsurface (1) Soil Samples (ppm)
Table 6.On-Site Soil: AREA F - Surface (23) and Subsurface (10) Soil Samples (ppm)
Table 7.On-Site Soil: AREA H1 - Surface (17) and (3) Subsurface Soil Samples (ppm)
Table 8.On-Site Soil: AREA H2 - Surface (13) and Subsurface (3) Soil Samples (ppm), Metals
Table 9.On-Site Soil (ppb), Volatile Organics
Table 10.Sediment
Table 11.On-Site Surface Water (ppb)
Table 12.On-Site Monitoring Wells (ppb)
Table 13.Residential wells, 1988 (ppb)
Table 14.Residential Wells: Samples Taken from Nonfiltered Water, 1988-1992 (ppb)
Table 15.Residential Wells: Samples Taken from Tap Water, 1988-1992 (ppb)
Table 16.Off-Site Surface Water (ppb)
Table 17.Off-Site Monitoring Wells, 1993 (ppb)
Table 18.Completed Exposure Pathways
Table 19.Potential Exposure Pathways


Table 1. On-Site Soil

AREA A1.

Surface (27) and Subsurface (2) Soil Sampling (ppm)

METALS
Highest
Concentration
Concentration
Range
Comparison
Value
# SamplesExceededCV's
Antimony29<12-2920 RMEG1
Cadmium35<1.1-3540 EMEG0
Chromium (VI)20022-200300 RMEG0
Copper15012-150NANA
Lead2070<6-2070NANA
Nickel3307-3301000
RMEG
0
Zinc15,00020-15,00020,000
RMEG
0
Arsenic 6.11.8-6.10.4 CREG29
Mercury (inorganic)<0.5<0.5NA0
Silver <1.4<1.1-<1.4300 RMEG0
Selenium*<6.7<0.55-<6.7200 EMEG0

Source: O'Brien and Gere, June 1990.
*The detection limit for selenium was elevated due to matrix interferences.


Table 2. On-Site Soil

AREA A2.

Surface (17) and Subsurface (1) Soil Sampling (ppm)

METALS
Highest
Concentration
Concentration
Range
Comparison
Value
# Samples
ExceededCV's
Antimony<12<12-<1520 RMEG0
Cadmium<1.5<1.2-<1.540 EMEG0
Chromium(VI) 5512-55300 RMEG0
Copper2915-29NANA
Lead31013-310NANA
Nickel3612-361000 RMEG0
Zinc13044-13020,000 RMEG0
Arsenic 7.41.7-7.40.4 CREG18
Mercury<0.5<0.5NA0
Silver<1.5<1.2-<1.5300 RMEG0
Selenium*2.0<0.67-<6.6200 RMEG0

Source: O'Brien and Gere, June 1990.
*The detection limit for selenium was elevated due to matrix interferences.


Table 3. On-Site Soil

AREA B.

Surface (10) and Subsurface (2) Soil Sampling (ppm)

METALS
Highest
Concentrations
Concentration
Range
Comparison
Value (CV)
# Samples
Exceeded
CV's
Antimony<14<13-<1420 RMEG0
Cadmium<1.4<1.3-<1.440 EMEG0
Chromium(VI)5731-57300 RMEG0
Copper7013-70NANA
Lead359-35NANA
Nickel238-231000 RMEG0
Zinc15018-15020,000
RMEG
0
Arsenic 5.72.7-5.70.4 CREG12
Mercury<0.5<0.5NA0
Silver<1.4<1.3-<1.4300 RMEG0
Selenium*<6.6<0.61-<6.6200 RMEG0

Source: O'Brien and Gere, June 1990.
*The detection limit for selenium was elevated due to matrix interferences.


Table 4. On-Site Soil

AREA C - Surface (21) and Subsurface (2) Soil Sampling (ppm)

Table 1.

Human Health Effects at Various Hydrogen Sulfide Concentrations in Air

METALS
Highest
Concentrations
RangeComparison
Values (CV)
# Samples
Exceeded
CV's
Antimony<14<11-<1420 RMEG0
Cadmium<1.4<1.1-<1.440 EMEG0
Chromium(VI)53028-530300 RMEG1
Copper2910-29NANA
Lead53<6-53NANA
Nickel670<6-6701000
RMEG
0
Zinc85011-85020,000
RMEG
0
Arsenic 5.0<0.64-50.4 CREG23
Mercury<0.5<0.5NA0
Silver<1.4<1.1-<1.4300
RMEG
0
Selenium*4.1<0.54-4.1200
RMEG
0

Source: O'Brien and Gere, June 1990.
*The detection limit for selenium was elevated due to matrix interferences.


Table 5. On-Site Soil

AREA'S D and E.

Surface (8) and Subsurface (1) Soil Samples (ppm)

METALS
Highest
Concentrations
Concentration
Range
Comparison
Value (CV)
# Samples
Exceeded
CV's
Antimony<17<11-<1720 RMEG0
Cadmium<1.7<1.1-<1.740 EMEG0
Chromium(VI)8925-89300 RMEG0
Copper277-27NANA
Lead529-52NANA
Nickel418-411000 RMEG0
Zinc33032-33020,000
RMEG
0
Arsenic9.31.2-9.30.4 CREG9
Mercury<0.5<0.5NA0
Silver<1.7<1.1-<1.7300 RMEG0
Selenium*<7.0<0.69-<7.0200 RMEG0

Source: O'Brien and Gere, June 1990.
*The detection limit for selenium was elevated due to matrix interferences.


Table 6. On-Site Soil

AREA F.

Surface (23) and Subsurface (10) Soil Samples (ppm)

METALS
Highest
Concentrations
Concentration
Range
Comparison
Value (CV)
# Samples
Exceeded
CV's
Antimony<13<11-<1320 RMEG0
Cadmium15<1.1-1540 EMEG0
Chromium
(VI)
190020-1900300 RMEG5
Copper926-92NANA
Lead3300<5.5-3300NANA
Nickel37008-37001000 RMEG3
Zinc280012-280020,000
RMEG
0
Arsenic 3.60.99-3.60.4 CREG33
Mercury<0.5<0.5NA0
Silver5<1.1-5300 RMEG0
Selenium*<6.5<0.55-<6.5200 RMEG0

Source: O'Brien and Gere, June 1990.
*The detection limit for selenium was elevated due to matrix interferences.


Table 7. On-Site Soil

AREA H1.

Surface (17) and (3) Subsurface Soil Samples (ppm)

METALS
Highest
Concentrations
Concentration
Range
Comparison
Values (CV)
# Samples
Exceeded
CV's
Antimony25<13-2520 RMEG1
Cadmium4.2<1.3-4.240 EMEG0
Chromium
(VI)
9427-94300 RMEG0
Copper3813-38NANA
Lead767-76NANA
Nickel5810-581000 RMEG0
Zinc150031-150020,000
RMEG
0
Arsenic 4.71.1-4.70.4 CREG20
Mercury<0.5<0.5NA0
Silver<2.0<1.3-<2.0300 RMEG0
Selenium*<7.2<0.62-<7.2200 RMEG0

Source: O'Brien and Gere, June 1990.
*The detection limit for selenium was elevated due to matrix interferences.


Table 8. On-Site Soil

AREA H2.

Surface (13) and Subsurface (3) Soil Samples (ppm), Metals

METALS
Highest
Concentrations
Concentration
Range
Comparison
Values (CV)
# Samples
Exceeded
CV's
Antimony<14<11-<1420 RMEG0
Cadmium<1.4<1.1-<1.440 EMEG0
Chromium (VI)8222-82300 RMEG0
Copper147-14NANA
Lead476-47NANA
Nickel17<6-171000 RMEG0
Zinc4007-40020,000 RMEG0
Arsenic 5.51.6-5.50.4 CREG16
Mercury<0.5<0.5NA0
Silver<1.4<1.1-<1.4300 RMEG0
Selenium*<6.9<0.56-<6.9200 RMEG0

Source: O'Brien and Gere, June 1990.
*The detection limit for selenium was elevated due to matrix interferences.


Table 9.

On-Site Soil (ppb), Volatile Organics

CONTAMINANTS
Area EArea FArea H1Area H2Comparison
Value
Vinyl Chloride<16<13<20<131000 EMEG
t-1,2-Dichloroethene<16<13490<131,000,000
RMEG
Trichloroethene<16<1316001360,000 CREG
Tetrachloroethylene<16157756010,000 CREG
Toluene<16<13<20<1310,000,000
RMEG
Xylenes18<13<20<13100,000,000
RMEG

Source: O'Brien and Gere, June 1990.


Table 10.

Sediment

CONTAMINANTS
Maximum Levels in
Impoundments (11/89)
Maximum Levels in
Impoundments (6/91)
Maximum Levels in
Streams (11/89)
ComparisonValues
METALS (ppm)



Antimony140<16<1920 RMEG
Cadmium900140<1.930 RMEG
Chromium (VI)39,000170099300 RMEG
Lead82032380NA
Nickel7333321000 RMEG
Zinc51,000190014020,000RMEG
Arsenic <18.324.10.4 CREG
ORGANICS (ppb)



Vinyl Chloride<67
<191000 EMEG
t-1,2-Dichloroethene66
<191x106RMEG
Trichloroethene83
<1960,000CREG
Tetrachloroethylene<67
<1910,000CREG
Toluene200
31x107RMEG

Source: O'Brien and Gere, June 1994.


Table 11.

On-Site Surface Water (ppb)

CONTAMINANTS
Stream
Samples
Impoundment
Samples
Surface Water
Samples
(Area D)
Drinking
Water
Comparison
Value
Vinyl Chloride<1<1<10.2 EMEG
t-1,2-Dichloroethene61865200 RMEG
Trichloroethene196793 CREG
Tetrachloroethylene7<13200.7 CREG
Toluene33<12000 RMEG
Xylenes<1<1<120,000
RMEG

Samples also analyzed for antimony, beryllium, cadmium, chromium, nickel, thallium, mercury,lead, selenium, silver, zinc, copper and arsenic - no samples exceeded ATSDR drinking watercomparison values.
Source: O'Brien and Gere, June 1994.


Table 12.

On-Site Monitoring Wells (ppb)

CONTAMINANTS
Maximum
Concentration
found in
Monitoring Wells
MaximumConcentration found
in Monitoring Wells
Maximum
Concentration
found in Supply
Wells
Comparison Value
Date198919921989
Inorganics



Arsenic

70.02 CREG
Organics



1,2-Dichloroethene
(total)
26082010070 MCL
Tetrachloroethylene19004300380.7 CREG
Trichloroethene2800980973 CREG
Vinyl Chloride112570.2 EMEG

*Detection limits for sampling above comparison values
Source: O'Brien and Gere, June 1994.


Table 13.

Residential wells, 1988 (ppb)

CONTAMINANTS
RW 1RW 14
on-site
RW 45RW 46 RW 47RW 48Comparison
Value
1,1-Dichloroethene
2



0.06 CREG
t-1,2-Dichloroethene
200


2200 RMEG
Tetrachloroethylene
68



0.7 CREG
Trichloroethene2160110
463 CREG
Vinyl Chloride
90



0.2 EMEG

Source: O'Brien and Gere, April 1993, Table 13.




Table 14.

Residential Wells: Samples Taken from Nonfiltered Water, 1988-1992 (ppb)
CONTAMINANTSRW
1
RW 45RW 46RW 47RW 48RW 53Comparison Value
Acetone




59,5001000 RMEG
Benzene2
1

--
Chloroform




226 CREG
t-1,2 Dichloroethene1222131--200 RMEG
Ethyl Acetate




359000 RMEG
Ethyl Benzene




321000 RMEG
Methylene Chloride
222518005 CREG
Methyl Ethyl Ketone




16,6006000 RMEG
2-Propanol




12,234
Tetrachloroethylene



1--0.7 CREG
Toluene24122402000 RMEG
Trichloroethene32957120145--3 CREG
Xylenes (total)




11120,000 RMEG

Source: O'Brien and Gere, April 1993, Table 14.


Table 15.

Residential Wells: Samples Taken from Tap Water, 1988-1992 (ppb)

CONTAMINANTS
RW
1
RW
45
RW
46
RW
47
RW
48
RW
53
Comparison
Value
Methylene chloride
2
5

5 CREG
Trichloroethene
14



3 CREG

Source: O'Brien and Gere, April 1993, Table 14b.


Table 16.

Off-Site Surface Water (ppb)
CONTAMINANTSMaximum
Concentrations
from Little
Northeast Creek
Maximum
Concentrations from
Off-site Surface
Water
Drinking Water
Comparison
Values
Ambient Water
Quality Criteria

19871993

1,2-Dichloroethene
(total)
2.04.070.0 MCLNA
Tetrachloroethylene<1.05.00.7 CREG8.0
Trichloroethene5.017.03.0 CREG27.0

sampling locations for 1987 Sampling:
1. near 411 Stevenson Rd (5 ppb TCE)
2. drainage ditch near 22 Deans Lane (2 ppb TCE/2 ppb DCE)

sampling locations for 1993 Sampling: refer to map

Source: O'Brien and Gere, April 1993, Table 15.


Table 17.

Off-Site Monitoring Wells, 1993 (ppb)
CONTAMINANTSMaximum
Concentration
Number of wells
exceeding CV's
Comparison Value
Trichloroethene28003 (MW-2S, MW-
3S,MW-3D)
3 CREG

Source: O'Brien and Gere, June 1994, Table 11


Table 18.

Completed Exposure Pathways
PathwaySourceEnvironmental
Media
Point of
Exposure
Route of
Exposure
Exposed
Population
Time
AirOrdnance SiteAirResidences

Ordnance Site

InhalationNearby
Residents and
Employees at
Ordnance
Past
Private
Wells
Ordnance
Site
Ground
Water
Residences
(tap)
Ingestion

Inhalation

Skin Contact

Residents
along
Mechanics
Valley Road
Past

Present

Future

Surface
Soil
Ordnance
Site
Surface SoilOrdnance SiteIngestionEmployees of
MVTC and
trespassers
Past
Present
Future



Table 19.

Potential Exposure Pathways
PathwaySourceEnvironmental
Media
Point of ExposureRoute of
Exposure
Exposed
Population
Time
SedimentOrdnance
Site
SedimentImpoundments,
On-Site Streams,
Little Northeast
Creek
IngestionChildren,
Employees at
MVTC and
trespassers
Past
Present
Future
Ground
Water
Ordnance
Site
Ground WaterResidences,
Businesses at
MVTC
IngestionResidents,
Employees at
MVTC
Past
Present
Future
Surface
Water
Ordnance
Site
Impoundments and
Streams
Impoundments and
Streams
IngestionChildren,
Employees at
MVTC and
Trespassers
Past
Present
Future
Soil
(off-site)
Ordnance
Site
Runoff and
overflow from the
Impoundments
Residential Soil or
Soil on or around
Road
Inhalation/Ingestion ResidentsPast
Present
Future
OrdnanceOrdnance
Site
Shallow Buried
Ordnance
On-Site Areas
Where Ordnance is
Known to be
Buried
ExplosionEmployees at
MVTC,
Trespassers
Past
Present
Future
FishOrdnance
Site
Little Northeast
Creek
ResidenceIngestionLittle Northeast
Creek Fisheaters
Past
Present
Future



APPENDIX B

FIGURES


List of Figures
Figure 1.
Figure 2.
Figure 3.
Figure 4.
Figure 5.
Site Location Map
Areas of Concern
Sediment and Surface Water Sample Location Map
Surface Water Samples
Groundwater Monitoring Well Location Map



Figure 1. Site Location Map



Figure 2. Areas of Concern



Figure 3. Sediment and Surface Water Sample Location Map



Figure 4. Surface Water Samples



Figure 5. Groundwater Monitoring Well Location Map

1. 1Sentinel birth defects are immediately evident at birth. The World Health Organizationdevised the list of sentinel defects years ago. It was adopted by the 1981 Maryland law thatestablished Maryland's birth defect registry.


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