| Company Name | Address | City | State/Prov | Postal |
| Soilutions, Inc. | 217 W. Alameda Ave., Suite 101 | Burbank | CA | 91502- |
| Sugura | 23413 Kidd Drive | Diamond Bar | CA | 91765- |
| Summit | 638 Camino delos Mares, C-240, | San Clemente | CA | 92673- |
| Tank Protect | 1963 N. Main St. | Orange | CA | 92665- |
| Target | 5932 Bolsa Ave., #103 | Huntington | CA | 92649- |
| Technical Waste, | 1830 "A" Miraloma Avenue | Placentia | CA | 92670- |
| Terra Vac | 3303 Harbor Boulevard, Suite K-5 | Costa Mesa | CA | 92626- |
| Tetra Tech, Inc. | 670 North Rosemead Boulevard | Pasadena | CA | 91107- |
| The Earth | 100 W. Broadway | Long Beach | CA | 90802- |
| The LKR Group | 2341 205th St., Suite 103 | Torrance | CA | 90501- |
| The Mark Group | 1241 East Dyer Road, Suite 130 | Santa Ana | CA | 92705- |
| The Reynolds | P. O. Box 1996 | Tustin | CA | 92681-1996 |
| TorStan, Inc. | 424 Summit, Suite 200 | Oceanside | CA | 92054-2597 |
| Toxguard | 30-A Mauchy | Irvine | CA | 92718- |
| Toxic | 3197-C Airport Loop Drive | Costa Mesa | CA |
| TRAK | 4125 Market Street, No. 19 | Ventura | CA | 93003- |
| TRC | 23361 Madero St., Ste. 100 | Mission Viejo | CA | 92691- |
| Treateh, Inc. | 2701 E. Hammer Lane, Suite 103 | Stockton | CA | 95210- |
| U. S. Services, | 526 Railroad St. | Corona | CA | 91720- |
| Underwood Loss | 3516 E. Century Blvd. #10 | Lynwood | CA | 90262- |
| URS | 401 E. Ocean Blvd. | Long Beach | CA | 90802- |
| UST Compliance | 13200 Crossroads Parkway | City of Industry | CA | 91746- |
| UtlraSystem | 6 Jenner, Suite 210 | Irvine | CA | 92618-3811 |
| Valley Well | P. O. Box 23030 | Ventura | CA | 93002- |
| Vanguard | 357 Huntington Street | Irvine | CA | 92720- |
| VenVirotek | 1536 Eastman Ave., Suite 6-A | Ventura | CA | 93003- |
| Viniegra & | 1314 Wilshire Blvd. | Los Angeles | CA | 90017- |
| Woodward-Clyde | 203 N. Golden Circle Dr. | Santa Ana | CA | 92705- |
| Friday, March 16, 2001 | Page 7 of 7 |