| | — | ABT ASSOC INC | $0 | ENVIRONMENTAL PROTECTION AGENCY | — | — | — | B510SPECIAL STUDIES/ANALYSIS- ENVIRONMENTAL ASSESSMENTS | Feb 15, 1997 | Feb 15, 1997 | Apr 15, 2001 |
| | — | ABT ASSOC INC | $0 | ENVIRONMENTAL PROTECTION AGENCY | — | — | — | B510SPECIAL STUDIES/ANALYSIS- ENVIRONMENTAL ASSESSMENTS | Jan 15, 1997 | Jan 15, 1997 | Apr 15, 2001 |
| | — | ABT ASSOC INC | $0 | ENVIRONMENTAL PROTECTION AGENCY | — | — | — | B510SPECIAL STUDIES/ANALYSIS- ENVIRONMENTAL ASSESSMENTS | Dec 15, 1996 | Dec 15, 1996 | Apr 15, 2001 |
| | — | ABT ASSOC INC | $0 | ENVIRONMENTAL PROTECTION AGENCY | — | — | — | F999OTHER ENVIRONMENTAL SERVICES | Oct 15, 1996 | Oct 15, 1996 | Jul 15, 2001 |
| | — | ABT ASSOC INC | $0 | ENVIRONMENTAL PROTECTION AGENCY | — | — | — | F999OTHER ENVIRONMENTAL SERVICES | Sep 15, 1996 | Sep 15, 1996 | Oct 31, 2001 |
| | — | ABT ASSOC INC | $0 | ENVIRONMENTAL PROTECTION AGENCY | — | — | — | B510SPECIAL STUDIES/ANALYSIS- ENVIRONMENTAL ASSESSMENTS | Sep 15, 1996 | Sep 15, 1996 | Apr 15, 2001 |
| | — | ABT ASSOC INC | $0 | ENVIRONMENTAL PROTECTION AGENCY | — | — | — | B510SPECIAL STUDIES/ANALYSIS- ENVIRONMENTAL ASSESSMENTS | Sep 15, 1996 | Sep 15, 1996 | Apr 15, 2001 |
| | — | ABT ASSOC INC | $0 | ENVIRONMENTAL PROTECTION AGENCY | — | — | — | B510SPECIAL STUDIES/ANALYSIS- ENVIRONMENTAL ASSESSMENTS | Aug 15, 1996 | Aug 15, 1996 | Apr 15, 2001 |
| | — | ABT ASSOC INC | $0 | ENVIRONMENTAL PROTECTION AGENCY | — | — | — | B510SPECIAL STUDIES/ANALYSIS- ENVIRONMENTAL ASSESSMENTS | Jun 15, 1996 | Jun 15, 1996 | Apr 15, 2001 |
| | — | ABT ASSOC INC | $0 | ENVIRONMENTAL PROTECTION AGENCY | — | — | — | B510SPECIAL STUDIES/ANALYSIS- ENVIRONMENTAL ASSESSMENTS | Apr 15, 1996 | Apr 15, 1996 | Apr 30, 2001 |
| | — | ABT ASSOC INC | $0 | ENVIRONMENTAL PROTECTION AGENCY | — | — | — | AH36 | Dec 15, 1994 | Dec 15, 1994 | Sep 15, 1999 |
| | — | ABT ASSOC INC | $0 | ENVIRONMENTAL PROTECTION AGENCY | — | — | — | AH36 | Nov 15, 1994 | Nov 15, 1994 | Sep 15, 1999 |
| | — | ABT ASSOC INC | $0 | ENVIRONMENTAL PROTECTION AGENCY | — | — | — | AH36 | Nov 15, 1994 | Nov 15, 1994 | Sep 15, 1999 |
| | — | ABT ASSOC INC | $0 | ENVIRONMENTAL PROTECTION AGENCY | — | — | — | AH36 | Nov 15, 1994 | Nov 15, 1994 | Sep 15, 1999 |
| | — | ABT ASSOC INC | $0 | ENVIRONMENTAL PROTECTION AGENCY | — | — | — | R510 | Sep 15, 1994 | Sep 15, 1994 | Sep 15, 1997 |
| | — | ABT ASSOC INC | $0 | ENVIRONMENTAL PROTECTION AGENCY | — | — | — | R499SUPPORT- PROFESSIONAL: OTHER | Sep 15, 1994 | Sep 15, 1994 | Jul 15, 1999 |
| | — | ABT ASSOC INC | $0 | ENVIRONMENTAL PROTECTION AGENCY | — | — | — | R499SUPPORT- PROFESSIONAL: OTHER | Sep 15, 1994 | Sep 15, 1994 | Jul 15, 1999 |
| | — | ABT ASSOC INC | $0 | ENVIRONMENTAL PROTECTION AGENCY | — | — | — | C214ARCHITECT AND ENGINEERING- GENERAL: MANAGEMENT ENGINEERING | Sep 15, 1994 | Sep 15, 1994 | Sep 15, 1994 |
| | — | ABT ASSOC INC | $0 | ENVIRONMENTAL PROTECTION AGENCY | — | — | — | R499SUPPORT- PROFESSIONAL: OTHER | Sep 15, 1994 | Sep 15, 1994 | Jul 15, 1999 |
| | — | ABT ASSOC INC | $0 | ENVIRONMENTAL PROTECTION AGENCY | — | — | — | R499SUPPORT- PROFESSIONAL: OTHER | Sep 15, 1994 | Sep 15, 1994 | Jul 15, 1999 |
| | — | ABT ASSOC INC | $0 | ENVIRONMENTAL PROTECTION AGENCY | — | — | — | R499SUPPORT- PROFESSIONAL: OTHER | Sep 15, 1994 | Sep 15, 1994 | Jul 15, 1999 |
| | — | ABT ASSOC INC | $0 | ENVIRONMENTAL PROTECTION AGENCY | — | — | — | R510 | Aug 15, 1994 | Aug 15, 1994 | Sep 15, 1997 |
| | — | ABT ASSOC INC | $0 | ENVIRONMENTAL PROTECTION AGENCY | — | — | — | R510 | Aug 15, 1994 | Aug 15, 1994 | Sep 15, 1997 |
| | — | ABT ASSOC INC | $0 | ENVIRONMENTAL PROTECTION AGENCY | — | — | — | R510 | Aug 15, 1994 | Aug 15, 1994 | Sep 15, 1997 |
| | — | ABT ASSOC INC | $0 | ENVIRONMENTAL PROTECTION AGENCY | — | — | — | R510 | Aug 15, 1994 | Aug 15, 1994 | Sep 15, 1997 |