| ARIZONA |  |  |
| The 25 Facilities in Arizona storing the largest amounts of extremely hazardous substances.*
| Facility Name | City | Maximum amount in a single process (lbs) | Chemical
1 | APACHE NITROGEN PRODUCTS, INC. | BENSON | 9,175,000 | Ammonia (anhydrous)
2 | FERTIZONA COOLIDGE - LLC | COOLIDGE | 898,000 | Ammonia (anhydrous)
3 | HILL BROTHERS CHEMICAL CO. - PHOENIX FACILITY | PHOENIX | 550,000 | Chlorine
4 | DPC ENTERPRISES | GLENDALE | 400,000 | Chlorine
5 | 91ST AVENUE WWTP | TOLLESON | 330,000 | Chlorine
6 | THE DUNE COMPANY OF YUMA, ARIZONA | YUMA | 300,000 | Ammonia (anhydrous)
7 | CASA GRANDE CHEMICALS, INCORPORATED | CASA GRANDE | 275,000 | Ammonia (anhydrous)
8 | ARCH CHEMICALS - MESA FACILITY | QUEEN CREEK | 232,000 | Hydrogen fluoride (conc >=50%)
9 | ALKEMIN, S. DE R.L. DE C.V. | SAHUARITA | 230,000 | Carbon disulfide
10 | 23RD AVENUE WASTEWATER TREATMENT PLANT | PHOENIX | 210,000 | Chlorine
11 | FERTIZONA CASA GRANDE - LLC | CASA GRANDE | 206,723 | Ammonia (anhydrous)
12 | FERTIZONA WILLCOX - LLC | WILLCOX | 206,723 | Ammonia (anhydrous)
13 | FERTIZONA SAN TAN - LLC | SACATON | 206,723 | Ammonia (anhydrous)
14 | FERTIZONA FENNEMORE - LLC | WADDELL | 206,723 | Ammonia (anhydrous)
15 | FERTIZONA ROLL - LLC | ROLL | 206,723 | Ammonia (anhydrous)
16 | FERTIZONA YUMA - LLC | YUMA | 206,723 | Ammonia (anhydrous)
17 | FERTIZONA BUCKEYE - LLC | BUCKEYE | 206,723 | Ammonia (anhydrous)
18 | HASA INC | ELOY | 180,000 | Chlorine
19 | THE DUNE COMPANY OF ROLL, ARIZONA | ROLL | 170,000 | Ammonia (anhydrous)
20 | THE DUNE COMPANY OF POSTON, ARIZONA | POSTON | 170,000 | Ammonia (anhydrous)
21 | WESTERN FARM SERVICE, WELLTON | WELLTON | 170,000 | Ammonia (anhydrous)
22 | WILBUR-ELLIS COMPANY, SACATON | SACATON | 160,000 | Ammonia (anhydrous)
23 | BOC EDWARDS - PHOENIX | PHOENIX | 156,000 | Hydrogen chloride (anhydrous)
24 | TESSENDERLO KERLEY, INC. - PHOENIX FACILITY | PHOENIX | 150,000 | Ammonia (anhydrous)
25 | WESTERN FARM SERVICE, SOMERTON | SOMERTON | 142,500 | Ammonia (conc >=20%)
| *Extremely hazardous substances as defined by the U.S. Environmental Protection Agency under the Clean Air Act, Section 112(r).
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