| | — | EASTERN RESEARCH GROUP INC | $0 | ENVIRONMENTAL PROTECTION AGENCY | — | — | — | R533 | Sep 15, 1999 | Sep 15, 1999 | Jun 15, 2001 |
| | — | RESEARCH TRIANGLE INSTITUTE | $0 | ENVIRONMENTAL PROTECTION AGENCY | — | — | — | R533 | Sep 15, 1999 | Sep 15, 1999 | Sep 15, 2000 |
| | — | TETRA TECH, INC. | $0 | ENVIRONMENTAL PROTECTION AGENCY | — | — | — | R533 | Sep 15, 1999 | Sep 15, 1999 | Sep 14, 2002 |
| | — | TETRA TECH, INC. | $0 | ENVIRONMENTAL PROTECTION AGENCY | — | — | — | R533 | Sep 15, 1999 | Sep 15, 1999 | Sep 15, 2002 |
| | — | RESEARCH TRIANGLE INSTITUTE | $0 | ENVIRONMENTAL PROTECTION AGENCY | — | — | — | R533 | Sep 15, 1999 | Sep 15, 1999 | Sep 15, 2000 |
| | — | TETRA TECH, INC. | $0 | ENVIRONMENTAL PROTECTION AGENCY | — | — | — | R533 | Sep 15, 1999 | Sep 15, 1999 | Sep 15, 2002 |
| | — | EASTERN RESEARCH GROUP INC | $0 | ENVIRONMENTAL PROTECTION AGENCY | — | — | — | R533 | Jun 15, 1999 | Jun 15, 1999 | Jun 15, 2001 |
| | — | RESEARCH TRIANGLE INSTITUTE | $0 | ENVIRONMENTAL PROTECTION AGENCY | — | — | — | R533 | Jun 15, 1999 | Jun 15, 1999 | Sep 15, 2000 |
| | — | RESEARCH TRIANGLE INSTITUTE | $0 | ENVIRONMENTAL PROTECTION AGENCY | — | — | — | R533 | Jun 15, 1999 | Jun 15, 1999 | Sep 15, 2000 |
| | — | RESEARCH TRIANGLE INSTITUTE | $0 | ENVIRONMENTAL PROTECTION AGENCY | — | — | — | R533 | May 15, 1999 | May 15, 1999 | Sep 15, 2000 |
| | — | EASTERN RESEARCH GROUP INC | $0 | ENVIRONMENTAL PROTECTION AGENCY | — | — | — | R533 | May 15, 1999 | May 15, 1999 | Jun 15, 2001 |
| | — | RESEARCH TRIANGLE INSTITUTE | $0 | ENVIRONMENTAL PROTECTION AGENCY | — | — | — | R533 | Apr 15, 1999 | Apr 15, 1999 | Sep 15, 2000 |
| | — | EASTERN RESEARCH GROUP INC | $0 | ENVIRONMENTAL PROTECTION AGENCY | — | — | — | R533 | Apr 15, 1999 | Apr 15, 1999 | Jun 15, 2001 |
| | — | RESEARCH TRIANGLE INSTITUTE | $0 | ENVIRONMENTAL PROTECTION AGENCY | — | — | — | R533 | Mar 15, 1999 | Mar 15, 1999 | Sep 15, 2000 |
| | — | RESEARCH TRIANGLE INSTITUTE | $0 | ENVIRONMENTAL PROTECTION AGENCY | — | — | — | R533 | Mar 15, 1999 | Mar 15, 1999 | Sep 15, 2000 |
| | — | RESEARCH TRIANGLE INSTITUTE | $0 | ENVIRONMENTAL PROTECTION AGENCY | — | — | — | R533 | Mar 15, 1999 | Mar 15, 1999 | Sep 15, 2000 |
| | — | EASTERN RESEARCH GROUP INC | $0 | ENVIRONMENTAL PROTECTION AGENCY | — | — | — | R533 | Mar 15, 1999 | Mar 15, 1999 | Jun 15, 2001 |
| | — | EASTERN RESEARCH GROUP INC | $0 | ENVIRONMENTAL PROTECTION AGENCY | — | — | — | R533 | Mar 15, 1999 | Mar 15, 1999 | Jun 15, 2001 |
| | — | RESEARCH TRIANGLE INSTITUTE | $0 | ENVIRONMENTAL PROTECTION AGENCY | — | — | — | R533 | Mar 15, 1999 | Mar 15, 1999 | Sep 15, 2000 |
| | — | EASTERN RESEARCH GROUP INC | $0 | ENVIRONMENTAL PROTECTION AGENCY | — | — | — | R533 | Mar 15, 1999 | Mar 15, 1999 | Jun 15, 2001 |
| | — | RESEARCH TRIANGLE INSTITUTE | $0 | ENVIRONMENTAL PROTECTION AGENCY | — | — | — | R533 | Mar 15, 1999 | Mar 15, 1999 | Sep 15, 2000 |
| | — | HYDROGEOLOGIC, INC. | $0 | ENVIRONMENTAL PROTECTION AGENCY | — | — | — | R533 | Feb 15, 1999 | Feb 15, 1999 | Jun 15, 1999 |
| | — | RESEARCH TRIANGLE INSTITUTE | $0 | ENVIRONMENTAL PROTECTION AGENCY | — | — | — | R533 | Feb 15, 1999 | Feb 15, 1999 | Sep 15, 2000 |
| | — | RESEARCH TRIANGLE INSTITUTE | $0 | ENVIRONMENTAL PROTECTION AGENCY | — | — | — | R533 | Jan 15, 1999 | Jan 15, 1999 | Sep 15, 2000 |
| | — | RESEARCH TRIANGLE INSTITUTE | $0 | ENVIRONMENTAL PROTECTION AGENCY | — | — | — | R533 | Jan 15, 1999 | Jan 15, 1999 | Sep 15, 2000 |