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Toxics Release Inventory
2007 Nevada Report
*1. PRCtf*"
U.S. EPA Region 9: California, Arizona, Nevada, Hawaii, the Pacific Islands, and Tribal Nations
Nevada's Releases
In Nevada, 133 facilities reported a total of 222
million pounds of toxic chemical releases to EPA's
Toxic Release Inventory (TRI) for 2007. Nevada's
total reported on-site and off-site releases increased
2.1% or 4.5 million pounds, when compared to
2006 data. However, the three-year comparison
shows an overall decrease in releases reported for
Nevada, driven by a decrease in land releases.
Total Releases for Reporting Years 2005 - 2007
Year
Air
Water
On-Site Land
Underg round
Injection
Off-Site
2005
1,963,910
110,556
321,817,294
6
1,331,240
2006
1,561,778
191,653
214,170,699
4
1,430,673
2007
1,439,784
144
217,547,857
0
2,847,441
Industry Breakdown
Metal mining facilities account for 96% of Nevada's
Toxic Release Inventory (TRI) chemical releases,
including 98% of the releases to land. Miningland
releases and off-site disposal drove Nevada's 4.5
million pound increase.
Total Releases: Nevada Industry Sectors
2005
2007
~	Metal Ore Mining
~	Electric Power Generation
¦ Nonferrous Metal
~	All Other
~	Hazardous Waste Treatment
~	Basic Chemical Manufacturing
~	Forging & Stamping
Facilities with Largest Chemical Releases
Gold miningfacilities accounted for nine of the top
10 total reported releases in 2007. US Ecology Inc.,
a hazardous waste transfer reported the eighth
highest releases.

Facility Name
City
Total
Releases
1
Barrick Goldstrike Mines Inc.
Elko
47,930,024
2
Newmont Mining Corp-
Twin Creeks Mine
Golconda
46,863,508
3
Ruby Hill Mine
Eureka
33,053,693
4
Newmont Mining Corp-
Carlin South Area
Carlin
27,617,289
5
Newmont Mining Corp-
Lone Tree Mine
Valmy
16,624,201
6
Robinson Nevada Mining Co
Ruth
14,796,794
7
Newmont Mining Corp-
Copper Canyon Facility
Battle Mountain
11,953,099
8
US Ecology Nevada Inc.
Beatty
3,437,368
9
Cortez Gold Mines
Crescent Valley
3,059,160
10
Smoky Valley Common Operation
Round Mountain
2,440,231
Releases to the Environment
Land: Overall on-site land releases increased 3.4
million pounds (1.6%) from 2006. Gold mines re-
ported the largest increases and decreases in land
releases. Largest Increases: Ruby Hill Mine
reported a 32.8 million pound increase, up from
242 thousand pounds. Robinson Nevada and
Bald Mountain Mines reported increases of 3.9
million and 1.8 million respectively. Largest
Decreases: Newmont Mining Corporation
(Newmont)-Twin Creeks Mine, 10 million pounds.
Newmont-Lone Tree and Newmont-Copper
Canyon mines reported decreases of 8.0 million
and 5.9 million pounds, respectively.
Air: Air releases decreased 7.8% (122 thousand
pounds) from 2006 to 2007. RR Donnelly, a com-
mercial gravure printingfacility in Reno, drove the
air release numbers with a 118 thousand pound

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(23.6%) decrease. The largest increase in air
releases was reported by Newmont-Carlin South
Area gold mine, a 32 thousand pound (51.2%)
increase from 2006.
Water: Reported water releases decreased 192
thousand pounds from 2006, a 99.9% change. The
decrease was due almost entirely to one gold mine,
Newmont-Lone Tree Mine, which reported a 191
thousand pound decrease.
Underground Injection: No facilities reported
underground injection releases in 2007, down from
4 pounds in 2006.
Off-Site Releases (Transfers and Disposal):
Nevada's off-site releases nearly doubled in 2007,
an increase of 1.4 million pounds. The largest
increase was reported by 21st Century Environ-
mental Management, Inc., a hazardous waste
treatment and disposal facility, at 1.2 million
pounds. Chemical manufacturer Pioneer Americas
LLC reported a 100% decrease in off-site releases,
from 27 thousand pounds in 2006 to zero pounds
in 2007.
2007 Nevada Releases to Environment
Underground
0%
Air
1%
PBT Chemical Releases
Releases of Persistent, Bioaccumulative and Toxic
(PBT) chemicals are in pounds. Dioxin and dioxin-
like compounds data are in grams not in Toxicity
Equivalence (TEQ).
Nevada facilities reported 61 million pounds of total
on-site and off-site releases of PBT chemicals, an
increase of 1.7 million pounds (2.9%) from 2006.
Robinson Nevada Mining was the top releaser of
PBTs in 2007, reporting 14.4 million pounds re-
leased; an increase of 3.9 million (37%). Ruby Hill
Mine reported the largest increase of PBT releases
from 2006 to 2007, from 242 thousand to 7.8 million
pounds. Newmont-Copper Canyon Facility reported
the largest decrease of PBT releases, from 17 to 11
million pounds.
In determining release quantities for metal com-
pounds, facilities only consider the primary metal
portion of the compound. For instance, a facility
reporting lead compounds only reports the lead
portion of the lead compounds released. The PBT
chemicals are ranked by 2007 total releases.

Total On-Site and Off-Site
Percent
Change
Chemical
Releases

2006
2007
Lead & Lead Compounds
54,969,607
54,950,602
-0.03%
Mercury & Mercury
Compounds
4,325,134
6,095,127
41%
Chlordane
4,885
3,581
-27%
Trifluralin
2,841
2,023
-29%
Polychlorinated Biphenyls
682
584
-14%
Polycyclic Aromatic
Compounds
43
64
50%
Dioxin And Dioxin-like
Compounds (grams)
6.38
6.26
-2%
Benzo(G,H,l)Perylene
0.5
0.4
-23%
Hexachlorobenzene
703
0.00
-100%
Heptachlor
22
—
-100%
Toxaphene
0.01
-
-100%
Lead and Lead Compounds Releases
Almost 55 million pounds of lead and lead com-
pound releases were reported in 2007. The metal
mining industry accounted for 99% of the total
releases.
Largest Increases: Ruby Hill Mine (7.1 million
pounds), Robinson Nevada Mining (3.9 million
pounds), Bald Mountain Mine (1.8 million pounds),
and Newmont-Carlin South Area (1.3 million
pounds).
Largest Decreases: Newmont-Copper Canyon
Facility (5.9 million pounds), Newmont-Twin Creeks
Mine (3.9 million pounds), and Coeur Rochester
(3.6 million pounds).

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Mercury and Mercury Compounds
Total releases for mercury and mercury com-
pounds increased 41% from 2006, from 4.3 to 6.1
million pounds. This increase was largely a result
of increases to land releases by mining facilities.
Land: Land releases, primarily from metal mining
facilities, accountfor99%oftotal mercury releases
in Nevada. Largest Increases: Newmont-Carlin
North Area (693 thousand pounds), Newmont-Twin
Creeks Mine (480 thousand pounds), Ruby Hill
Mine (395 thousand pounds), and Newmont-Carlin
South Area (205 thousand pounds). Largest
Decreases: Newmont-Lone Tree Mine (50 thou-
sand pounds).
Air: The top mercury releases to air were reported
by Barrick Goldstrike Mines, Inc (740 pounds);
Newmont-Twin Creeks (659 pounds); Newmont-
Lone Tree Mine (630 pounds), Newmont-Carlin
South Area (545 pounds); Cortez Gold Mines (264
pounds); and Newmont-Carlin North Area (166
pounds). Largest Air Increases: Newmont-Carlin
South Area (196 pounds); Newmont-Carlin North
Area (146 pounds), Barrick Goldstrike Mines, Inc.
(115 pounds) and Cortez Goldmines (103 pounds).
Largest Air Decreases: Marigold Mining Co
(903 pounds) and Kennecott Rawhide Mining Co.
(290 pounds)
Polychlorinated Biphenyls (PCBs) and
Polycyclic Aromatic Compounds (PACs)
Reported releases of PCBs decreased 14.4%, from
682 to 584 pounds. U.S. Ecology Nevada, Inc., a
hazardous waste facility, was the only facility to
report PCB releases, and is responsible for the 98
pound reduction. PAC releases increased 50% (21
pounds). Asphalt plant Semmaterials, L.P.-Las Vegas
reported a 42 pound increase.
Total PBT Releases
Facilities with Largest PBT Releases
The top ten facilities in Nevada for total on-site and
off-site releases of PBT chemicals are:

Facility Name
City
Total
Releases
1
Robinson Nevada
Mining Co
Ruth
14,392,044
2
Newmont Mining Corp-
Copper Canyon Facility
Battle Mountain
11,017,408
3
Barrick Goldstrike Mines Inc.
Elko
7,908,304
4
Ruby Hill Mine
Eureka
7,750,533
5
Newmont Mining Corp-
Carlin South Area
Carlin
5,295,949
6
Cortez Gold Mines
Crescent Valley
2,872,380
7
Newmont Mining Corp-
Twin Creeks Mine
Golconda
2,451,043
8
Bald Mountain Mine
Elko
2,184,028
9
Coeur Rochester Inc. (silver mining)
Lovelock
2,012,499
10
Smoky Valley Common Operation
(gold mining)
Round Mountain
1,811,309
~	Lead and Lead Comp
¦ Mercury and Mercury Comp
~	Other
Mercury and Mercury
ComP	Other
10%	0%
Lead and Lead Comp
90%

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