| 545 | A R Watson Inc |
| 236 | AARC Environmental Inc |
| 442 | Aaron Oil Company Inc |
| 251 | Abutec LLC |
| 504 | AC2 Inc |
| 348 | Advance Tank & Construction |
| 537 | Allentech Inc |
| 843 | Allesco |
| 644 | Allied Energy Corporation |
| 317 | American Heating Company |
| 319 | American Tank & Vessel Inc |
| 455 | Ansul Incorporated |
| 902 | Anton Paar |
| 953 | APEX Piping Systems Inc |
| 326 | Apollo International Corp |
| 947 | Applus RTD |
| 817 | Argus Consulting Inc |
| 834 | ATEC Steel Fabrication & Const |
| 755 | Auma Actuators Inc |
| 311 | Baker Tank Co/Altech |
| 904 | Baker Corp |
| 553 | Bekaert CEB Technologies |
| 143 | BGI Contractors |
| 144 | BIC Alliance |
| 223 | Blackmer |
| 651 | BORSIG GmbH |
| 656 | Brand Energy & Infrastructure |
| 339 | Brodie International |
| 405 | Brown-Minneapolis Tank Co |
| 124 | Bulk Distributor — Storage |
| 840 | Bullard Company |
| 343 | Burner Combustion Systems |
| 249 | C&C Welding Inc |
| 805 | Caldwell Tanks |
| 118 | California Centrifugal Pump Inc |
| 117 | Cameron Valves & Measurements |
| 901 | Cape Inc |
| 151 | CAR-BER |
| 701 | Carbis Inc |
| 909 | Carbovac |
| 102 | Century Group Inc |
| 756 | Chemguard |
| 110 | Chemtec Energy Services Inc |
| 601 | Chicago Bridge & Iron Company |
| 913 | Clock Spring Company LP |
| 856 | Coastal Flow Measurement |
| 910 | Conestoga-Rovers & Associates |
| 328 | Conservatek Industries Inc |
| 412 | Consolidated Inc |
| 730 | Control Systems International |
| 917 | Corrigan Consulting Inc |
| 727 | Corrosion Control Incorporated |
| 229 | Corrpro |
| 926 | Cudd Energy Services |
| 735 | Dearman Systems Inc |
| 242 | Dehumidification Technologies |
| 116 | Delta Consultants |
| 738 | Denso North America Inc |
| 919 | Desmi Inc |
| 157 | Determan Brownie Inc |
| 912 | DGI-Menard Inc |
| 519 | Divicom Inc |
| 123 | Dixon Valve & Coupling Co |
| 745 | DJA Inspection Services Inc |
| 653 | Don Miller & Associates Inc |
| 252 | Dresser Pressure Regulation |
| 217 | DTN |
| 621 | Ed Martin & Associates |
| 201 | Emco Wheaton USA Inc |
| 507 | Emerson Process Management |
| 707 | Enardo an HMT Company |
| 452 | Entessa Inc |
| 921 | Envent Corporation |
| 720 | EnviroCon Systems Inc |
| 141 | ESDC Engineering |
| 146 | Evergreen Industrial Services |
| 145 | Evergreen Tank Solutions |
| 751 | Field Specialties Inc/RSI |
| 625 | Fisher Tank Company |
| 109 | Flexible Lifeline Systems |
| 240 | Fluxo Integrated Solutions |
| 209 | FMC Technologies |
| 922 | Fort Vale Engineering LTD |
| 523 | Gas Equipment Co Inc |
| 501 | Gauging Systems Inc |
| 725 | GE Analytical Instruments |
| 826 | GEM Mobile Treatment Services |
| 521 | General Atomics Electronic Sys |
| 440 | General Combustion/Gencor |
| 444 | Green Manufacturing |
| 552 | Greenberry Industrial |
| 620 | Groth Corporation |
| 932 | Groundwater & Environ Services |
| 900 | Halcrow |
| 543 | Hayward Baker Inc |
| 704 | Heatec Inc |
| 609 | HMT Inc |
| 711 | HMT Inspection |
| 417 | Honeywell Enraf Americas Inc |
| 637 | Horiba Instruments Inc |
| 700 | Hose Master Inc |
| 908 | Hydrocarbon Processing |
| 905 | Indumar Products |
| 148 | Industrial Maintenance Group |
| 126 | Industrial Surfacing Corporation |
| 557 | Innospec Fuel Specialties |
| 410 | Insultherm Inc |
| 835 | Integrated Command Software |
| 349 | International Tank Service Inc |
| 853 | Jensen Mixers |
| 142 | John M Ellsworth Co Inc |
| 648 | John Zink Company |
| 342 | Jordan Technologies Inc |
| 942 | K2 Industrial |
| 750 | Kanon Loading Equipment |
| 108 | Kelley Construction Inc |
| 101 | L&J Technologies |
| 722 | Lide Industries |
| 457 | Lightning Eliminators & Consult |
| 437 | Liquid Controls Group |
| 437 | Liquid Controls Group-Toptech |
| 724 | Liquip International Pty Limited |
| 451 | Loikits Industrial Services Inc |
| 127 | LUDECA Inc |
| 407 | M & J Valve An SPX Brand |
| 907 | M L Smith Jr Inc |
| 903 | Mascoat Products |
| 549 | Mass Technology Corporation |
| 450 | Matrix Inspection & Engineering |
| 643 | Matrix Service |
| 436 | Mesa Rubber Company |
| 508 | MFE Enterprises Inc |
| 803 | MidContinental Chemical Co |
| 649 | Mid-States Mechanical Services |
| 104 | Midwestern Services Inc |
| 946 | Mistras Services/Conam |
| 357 | Mix Bros Tank Services |
| 639 | MMC International Corp |
| 954 | MMI Tanks Inc |
| 345 | MultiTherm LLC |
| 226 | Net Safety Monitoring Inc |
| 550 | Newson Gale Inc |
| 945 | Norit Americas Inc |
| 657 | NovaFlex Industries |
| 227 | O'Briens Management Associates |
| 244 | OCV Control Valves |
| 555 | Odessa Pumps and Equipment Co |
| 847 | Oil Gas & Petrochem Equipment |
| 830 | Oil Mop LLC |
| 206 | Oilco Liquid Handling Systems |
| 824 | OleumTech Corporation |
| 107 | OMNTEC |
| 233 | OPW Engineered Systems |
| 816 | Orion Marine Group |
| 833 | Pala-Interstate LLC |
| 106 | Paratherm Corporation |
| 717 | Pasadena Tank Corp an HMT Co |
| 924 | Paso Robles Tank Inc |
| 256 | Pat Tank Inc |
| 122 | PCA Engineering Inc |
| 642 | Pelican Worldwide |
| 823 | Petro Marine Division/A&M Industrial |
| 736 | PetroChem Inspection Services |
| 732 | Philadelphia Mixing Solutions |
| 138 | Phoenix Contact |
| 350 | Pigs Unlimited International Inc |
| 808 | Pipe Products |
| 250 | PLS Construction Services Inc |
| 133 | Pneumercator Co Inc |
| 916 | Polystar Inc |
| 356 | Port Security Services Inc |
| 911 | Porta-King Building Systems |
| 448 | Power Transfer Products |
| 401 | Praxair Services Inc |
| 857 | Primary Steel |
| 721 | ProAct Services Corporation |
| 517 | Protectoseal Company The |
| 825 | Protego (USA) |
| 234 | PURGIT div of Hilliard Emission |
| 821 | RAE Systems |
| 549 | RAGWORM |
| 845 | Rawell Environmental Ltd |
| 507 | Remote Automation Solutions |
| 257 | River |
| 232 | Rocky Mountain Fabrication |
| 741 | Rosen |
| 416 | Rotork Controls Inc |
| 635 | ST Hudson Engineers Inc |
| 616 | Sandborn Roofs Inc |
| 623 | Saybolt LP |
| 316 | Scully Signal Company |
| 807 | SedCon Technologies Inc |
| 920 | SET Industrial Services Inc |
| 243 | Shamrock Gulf |
| 849 | Shanghai Aile Petroleum Equip |
| 420 | Sherwin-Williams Company The |
| 941 | Silea |
| 733 | Solarcraft Inc |
| 129 | Solidification Products Int'l Inc |
| 748 | SOS Rubber International Inc |
| 801 | Spade Corporation |
| 819 | Spectrex Inc |
| 809 | StocExpo |
| 806 | StopAQ Amcorp Inc |
| 154 | STV Incorporated |
| 737 | Superior Industrial Maintenance |
| 918 | Tampa Tank |
| 731 | Tank Builders Inc |
| 210 | TCI Services Inc |
| 150 | TechCorr |
| 322 | Technip-Coflexip Division |
| 337 | Temcor |
| 811 | TEPSCO LP |
| 228 | TESCO/Symex Americas |
| 841 | Texon LP |
| 605 | Thermal Industrial Insulation Inc |
| 844 | Titan Industries |
| 507 | TMS (Terminal Management Solutions) |
| 832 | Tnemec Company Inc |
| 836 | TriStar PetroServ Inc |
| 120 | Tulsa Engineering Alliance Inc |
| 757 | Turco Valve Supply Inc |
| 222 | Tyco Thermal Controls |
| 915 | US Tank Protectors Inc |
| 134 | UCI |
| 631 | Ultraflote Corporation |
| 255 | United States Environmental |
| 940 | URS Corporation |
| 952 | US EPA--Region 6 |
| 321 | US Hose Corporation |
| 949 | USA Environment LP |
| 135 | Vacono Aluminium Covers GmbH |
| 500 | Valve Concepts Inc |
| 650 | Valve Systems and Controls |
| 301 | Varec Inc |
| 253 | Veolia ES Industrial Services Inc |
| 237 | Verwater |
| 618 | Volcanic Heater Inc |
| 422 | WL Walker Company Inc |
| 948 | WT Byler Co |
| 820 | WeamcoMetric |
| 152 | Western Valve |
| 100 | Wilks Enterprise Inc |
| 351 | Williams Fire & Hazard Control |
| 956 | Worldwide Oilfield Machine Inc |
| 951 | XOS |
| 950 | Zerust Oil & Gas |
