Reference:

Aerosol Monitoring &Analysis

1331 Ashton Road

Hanover, Maryland

Tel number (410) 684-3327

Ms. Barnett

I H Service

1831 Portal Street, Suite E

Baltimore, Maryland 21224-6507

Tel Number (410) 633-4000

Was on the Baltimore City Police Headquarter Project 1997-2000

Bristol Environmental Inc.,

1123 Beaver Street

Tel Number (215) 788-6040

Ernie Decaro

Perdomo Companies

3605 Old Veron Court

Alexandria, Va 22309

Orlando Perdomo Jr

Tel Number 571-218-9183

Barco Enterprise Inc.,

White Marsh, Maryland 21162

Tel Number (410) 335-0660

Bart Thomas

Bell BCI Company

1340 Lexington Ave

Rochester, New York 14606

Tel Number (585) 277-1000

Project # NIH Building 11 Phase Expansion

Bethesda, Maryland Contract Number 263-97C -0200

Subcontact Number C42603-L-9024

Clark Construction Group

LLC 7500 Old Georgetown Road

Bethesda, Maryland 20814

Tel Number (301) 272-8100

Larry

Edgewood Terrance Apartment

Washington, DC

White Flint Mall

11301 Rockville Pike

North Bethesda, Maryland 20895

Construction Department

Tel (301) 468-5777

Ms. Cynthia Cumbo

Guy and Guy Masonry Inc.,

Hopton Park Plz

Leonardtown, Maryland 20650

Tel Number (301) 475-8588