United States
Environmental Protection
jf
se Inventory Update
San> Diego Coum
Reporting Years 2p^pas±\Lr

August 2012
U.S. EPA Region 9: California, Arizona, Nevada, Hawaii, the Pacific Islands, and Tribal Nations
San Diego County Releases
In 2010,34 facilities reported a total of 1,000,000
pounds of toxic chemical releases. San Diego
County's total reported on-site and off-site releases
increased 14% (77,439 pounds), when compared
to 2009 data.
Total Releases for Reporting Years 2008 - 2010
Year
Air
Water
Underground
Injection
On-Site Land
Off-Site
2008
490,4981
14,935
40,606
523,597
143,989
2009
418,61652
410
27,668
477,752
91,236
2010
322,13948
35626,956
522
,820
123,607
What is a Release?
AToxics Release inventory (TRI) "release" is defined
as the amount of a toxic chemical released on-site
(to air, water, underground injection, landfills, and
other land disposal) and the amount transferred
off-site for disposal; it is measured in pounds, un-
less stated otherwise.
Releases to the Environment
Air: Air releases decreases 23% (96,477 pounds)
since 2009.
Facilities with Largest Chemical Releases
The top ten facilities in San Diego County for totai
on-site and off-site releases of all chemicals were
the following:
Note: "0%" means less than 0.5%.
Note: If no release amounts are shown, this means the facility manufac-
tures, processes, or otherwise uses above threshold amounts of the
chemical, which triggers a requirement to report. It may still have no
releases.
In determining release quantities for metal compounds, facilities only
consider the primary metal portion of the compound For instance, a
facility reporting for lead compounds only reports the lead portion of the
lead compounds released.

Facility Name
AirV\
'ater
Under-
ground
Injection
Land
Off-site
Releases
Total
Releases
(pounds)
%of
Total
1
US DOD MARINECORPS
BASE CAMP PENDLETON
921
-
-
194,151
194,151
195,073
87%
2
US DOD MARINECORPS
AIRSTATION MIRAMAR
-
-
-
26,293
26,293
26,293
12%
3
ROHRINCDBA
GOODRICH AERO-
STRUCTURES GROUP
1
0
-
-
>
1,014
0%
4
US NAVAL BASE
SAN DIEGO
0
-
-
-
>
202
0%
5
US NAVY NAVAL
SUBMARINE BASE
SAN DIEGO
<
-
-
-
>
187
0%
6
US NAVY NAVAL AIR
STATION NORTH ISLAND
0
-
-
-
-
130
0%
7
KYOCERA
AMERICAINC
-
-
-
-
-
95
0%
8
GENERAL DYNAMICS
(NASSCO)
-
-
-
-
-
73
0%
9
ROCKWELL COLLINS
OPTRONICS
-
«
-
-
-
23
0%
10
USNAVALAMPHIBIOUS
BASESMALL
ARMS RANGE (PART)
-
-
-
-
-
20
0%
Water: Water releases decreases 7% (4,054 pounds)
since 2009.
Underground Injection: decreased 3% (712 pounds)
since 2009.
Top 10 Released Chemicals
The top released chemicals based on total on-site
and off-site releases in San Diego County were the
following:
On-Site Land: Land releases increased 9% (45,068
pounds) since 2009.
Off-site: Off-site releases increased 35% (32,371
pounds) since 2009.

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Chemical
Total Releases
(pounds)
Percentage of
Total Releases
1
NITRATE COMPOUNDS
235,460
22%
2
LEAD COMPOUNDS
195,258
19%
3
COPPER
187,309
18%
4
N-BUTYL ALCOHOL
70,946
7%
5
ACETONITRILE
60,257
6%
6
1,2,4-TRIMETHYLBENZENE
50,775
5%
7
LEAD
31,339
3%
8
ETHYLENE GLYCOL
29,026
3%
9
DICHLOROMETHANE
27,753
3%
10
COPPER COMPOUNDS
25,884
2%
PBT Chemical Releases
Starting in 2000, EPA established more stringent
reporting thresholds for persistent bioaccumulative
toxic (PBT) chemicals originally on, or added to,
the TRI chemical list. PBT chemicals are of par-
ticular concern not only because they are toxic,
but also because they remain in the environment
for long periods of time, are not readily destroyed,
and build up or accumulate in body tissue. The
TRI PBT chemicals include dioxin and dioxin-like
compounds, lead and lead compounds, mercury
and mercury compounds, polycyclic aromatic com-
pounds (PACs), polychlorinated biphenyls (PCBs),
and certain pesticides, among other chemicals.
Chemical
Total Releases
(pounds)
Percentage of
Total Releases
LEAD AND
LEAD COMPOUNDS
223,135
100%
POLYCYCLIC AROM ATI C
COMPOUNDS
1.3
0%
BENZO (G.H.I)
PERYLENE
0.0
0%
MERCURY
0.0
0%
Note: "0%" means less than 0.5%.
Facilities with Largest PBT Releases
The top nine facilities in San Diego County for total
on-site and off-site releases of PBT Chemicals are:

Facility Name
Sum of Total
Releases
Percentage of
Total Releases
1
US DOD MARINE CORPS BASE
CAMP PENDLETON
195,073
44%
2
US DOD MARINE CORPS
AIRSTATION MIRAMAR
26,293
6%
3
ROHR INC DBA GOODRICH
AEROSTRUCTURES GROUP
1,014
0%
4
US NAVAL BASE
SAN DIEGO
202
0%
5
US NAVY NAVAL SUBMARINE BASE
SAN DIEGO
187
0%
6
US NAVY NAVAL AlRSTATION
NORTH ISLAND
130
0%
7
KYOCERA AMERICA INC.
95
0%
8
GENERAL DYNAMICS
(NASSCO)
73
0%
9
ROCKWELL COLLINS
OPTRONICS
23
0%

GRAND TOTAL
223,090
50%
Note: "0%" means less than 0.5%.
On-line Access
For more information, see:
www.epa.gov/tri
(For national TRI information)
www.epa.gov/region09/tri
(For Regional TRI information)
Or contact Lily Lee, Toxic Release Inventory Coordi-
nator, US EPA Region 9, at lee.lily@epa.gov or
415-947-4187.
Release data alone are not sufficient to determine
exposure or to calculate potential risks to human
health and the environment. TRI data, in conjunc-
tion with other information, such as the toxicity of
the chemical, the release medium (e.g., air), and
site-specific conditions, can be used as a starting
point in evaluating exposures that may result from
releases of toxic chemicals.

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