| | — | KLD ASSOCIATES INC | $0 | FEDERAL HIGHWAY ADMINISTRATION | — | — | — | AT60 | Apr 15, 1995 | Apr 15, 1995 | Apr 15, 1995 |
| | — | LAST RESOURCE, INC. | $0 | FEDERAL HIGHWAY ADMINISTRATION | — | — | — | AT60 | Sep 15, 1993 | Sep 15, 1993 | May 15, 1994 |
| | — | THE CENTER FOR APPLIED RESEARCH | $0 | FEDERAL HIGHWAY ADMINISTRATION | — | — | — | AT60 | Aug 15, 1993 | Aug 15, 1993 | May 15, 1994 |
| | — | LAST RESOURCE, INC. | $0 | FEDERAL HIGHWAY ADMINISTRATION | — | — | — | AT60 | May 15, 1993 | May 15, 1993 | May 15, 1994 |
| | — | LAST RESOURCE, INC. | $0 | FEDERAL HIGHWAY ADMINISTRATION | — | — | — | AT60 | Sep 15, 1992 | Sep 15, 1992 | — |
| | — | KLD ASSOCIATES INC | $0 | FEDERAL HIGHWAY ADMINISTRATION | — | — | — | AT60 | Jun 15, 1992 | Jun 15, 1992 | — |
| | — | LAST RESOURCE, INC. | $0 | FEDERAL HIGHWAY ADMINISTRATION | — | — | — | AT60 | May 15, 1992 | May 15, 1992 | — |
| | — | RESEARCH TRIANGLE INSTITUTE | $0 | FEDERAL HIGHWAY ADMINISTRATION | — | — | — | AT60 | Feb 15, 1992 | Feb 15, 1992 | — |
| | — | LAST RESOURCE, INC. | $0 | FEDERAL HIGHWAY ADMINISTRATION | — | — | — | AT60 | Sep 15, 1991 | Sep 15, 1991 | — |
| | — | LAST RESOURCE, INC. | $0 | FEDERAL HIGHWAY ADMINISTRATION | — | — | — | AT60 | Sep 15, 1991 | Sep 15, 1991 | — |
| | — | THE CENTER FOR APPLIED RESEARCH | $0 | FEDERAL HIGHWAY ADMINISTRATION | — | — | — | AT60 | Jul 15, 1991 | Jul 15, 1991 | — |
| | — | RESEARCH TRIANGLE INSTITUTE | $0 | FEDERAL HIGHWAY ADMINISTRATION | — | — | — | AT60 | May 15, 1991 | May 15, 1991 | — |
| | — | RESEARCH TRIANGLE INSTITUTE | $0 | FEDERAL HIGHWAY ADMINISTRATION | — | — | — | AT60 | Feb 15, 1991 | Feb 15, 1991 | — |
| | — | SPERRY DALMO VICTOR | $0 | FEDERAL AVIATION ADMINISTRATION | — | — | — | AT60 | Feb 15, 1991 | Feb 15, 1991 | — |
| | — | THE PENNSYLVANIA STATE UNIVERSITY | $0 | FEDERAL HIGHWAY ADMINISTRATION | — | — | — | AT60 | Feb 15, 1991 | Feb 15, 1991 | — |
| | — | RESEARCH TRIANGLE INSTITUTE | $0 | FEDERAL HIGHWAY ADMINISTRATION | — | — | — | AT60 | Jan 15, 1991 | Jan 15, 1991 | — |