| Aerojet Gencorp, Aerojet Elect | 8 | 71 | 13,942.30 |
| Avery Dennison | 6 | 37 | 66,518.91 |
| Azusa City Sierra Madre Landfill | 28 | 28 | 63,237.99 |
| Azusa Land Reclamation Co Inc Inert Lf | 28 | 28 | 16,887.21 |
| California Amforge Corporation | 6 | 33 | 11,560.00 |
| Cardinal Church Furniture | 9 | 10 | 13,950.23 |
| Criterion Catalyst Co L.P. | 10 | 62 | 14,794.05 |
| Cwmi - Azusa Facility | 11 | 58 | 11,468.68 |
| Engineered Polymer Solutions I | 7 | 25 | 1,569.74 |
| Epsilon Foam Corp | 6 | 17 | 22,161.49 |
| Falcon Prods. Inc. | 1 | 2 | 12,250.00 |
| Falcon Products, Inc. | 7 | 16 | 40,234.00 |
| Hannemann Fiberglass Inc | 1 | 1 | 3,277.00 |
| Hytrol Of California, Inc. | 5 | 5 | 15,865.00 |
| Magparts Inc | 6 | 29 | 22,193.44 |
| Mentor Orc Inc | 18 | 68 | 133,180.83 |
| Norac Inc. | 1 | 2 | 100.00 |
| Phaostron Instrument & Electro | 8 | 25 | 2,115.00 |
| R.E. Atckinson Co. Inc. | 5 | 5 | 41,782.80 |
| Reichhold Inc | 9 | 50 | 15,530.16 |
| Rubber/Urethanes Incorporated | 4 | 6 | 4,249.87 |
| Shamrock Ranch Disposal Site | 28 | 28 | 63,237.99 |
| Southdown California Concrete | 15 | 29 | 99,881.68 |
| The Norac Co Inc | 1 | 1 | 48.53 |
| Thermal Remediation Solutions, | 6 | 6 | 16,705.12 |
| Valspar Corporation | 2 | 2 | 131.80 |
| Vision-Ease Lens Azusa, Inc. | 6 | 25 | 21,700.00 |
| Western Envir. Contracting Inc | 6 | 6 | 15,320.04 |
| Western Environmental Contract | 6 | 12 | 9,306.38 |
| Wynn Oil Co | 2 | 2 | 155.00 |
