| Company Name | Address | City | State | Zip Code | Phone Number | Fax Number |
| AMEC E & I INC | 8745 W HIGGINS RD, STE 300 | CHICAGO | IL | 60631 | (773) 693-6030 | (773) 693-6039 |
| ANDERSON ENVIRONMENTAL COMPANY | 201 N 6TH ST | ROCKFORD | IL | 61107 | (815) 962-9000 | (815) 962-7978 |
| ANDREWS ENGINEERING INC | 420 EISENHOWER LN NO | LOMBARD | IL | 60148 | (630) 953-3332 | (630) 953-3331 |
| APTIM ENVIRONMENTAL & | 1607 E MAIN ST, STE E | ST CHARLES | IL | 60174 | (630) 762-1400 | (630) 762-1402 |
| ARRO LABORATORY INC | PO BOX 686 | JOLIET | IL | 60434 | (815) 727-5436 | (815) 740-3234 |
| BBJ GROUP LLC | 140 S DEARBORN ST, STE 1520 | CHICAGO | IL | 60603 | (312) 644-8556 | (312) 644-8555 |
| BROOKS APPLIED LABS | 18804 N CREEK PKWY STE 100 | BOTHELL | WA | 98011 | (206) 632-6206 | (206) 632-6017 |
| CAPITAL INDUSTRIAL COATINGS LLC | 141 E 141ST ST | HAMMOND | IN | 46327 | (312) 508-5085 | (312) 508-5087 |
| CARDNO INC | 6605 STEGER RD, UNIT A | MONEE | IL | 60449 | (708) 534-3450 | (708) 534-3480 |
| CARLSON ENVIRONMENTAL INC | 65 E WACKER PL, STE 2210 | CHICAGO | IL | 60601-7253 | (312) 346-2140 | (312) 346-6956 |
| CIVIL & ENVIRONMENTAL | 555 BUTTERFIELD RD, STE 300 | LOMBARD | IL | 60148 | (630) 963-6026 | (630) 963-6027 |
| DEIGAN & ASSOCIATES LLC | 28835 N HERKY DR UNIT 120 | LAKE BLUFF | IL | 60044 | (847) 578-5000 | (847) 549-3242 |
| ENVIROBIDNET.COM | 24123 PEACHLAND BLVD C-4 310 | PORT CHARLOTTE | FL | 33954 | (888) 888-0900 | |
| ENVIRONMENTAL DESIGN INTERNATIONAL | 33 W MONROE ST, STE 1825 | CHICAGO | IL | 60603-5326 | (312) 345-8679 | (312) 345-0529 |
| ENVIROSCIENCE INC | 5070 STOW RD | STOW | OH | 44224 | (330) 414-6552 | (330) 688-3858 |
| FIRST ENVIRONMENTAL LABS INC | 1600 SHORE DR, STE D | NAPERVILLE | IL | 60563 | (630) 778-1200 | (630) 778-1233 |
| GZA GEOENVIRONMENTAL INC | 915 HARGER RD #330 | OAK BROOK | IL | 60523 | (630) 684-9100 | (630) 684-9120 |
| INTEGRATED ENVIRONMENTAL | 13435 KOLMAR AVE | CRESTWOOD | IL | 60445 | (708) 926-9588 | (708) 926-9251 |
| LAICON, INC. | 9914 DERBY LN STE 101 | WESTCHESTER | IL | 60154 | (708) 345-9450 | |
| LEYDEN ELECTRIC INC | 604 E NORTH ST | ELBURN | IL | 60119 | (630) 365-0200 | (630) 365-0202 |
| NATURAL RESOURCE TECHNOLOGY INC | 300 S WACKER DR, STE 1300 | CHICAGO | IL | 60606 | (312) 465-1740 | (414) 837-3608 |
| NORTH AMERICA PROCUREMENT COUNCIL | P O BOX 40445 | GRAND JUNCTION | CO | 81504 | (302) 450-1923 | (302) 450-1925 |
| ONSET COMPUTER CORPORATION | 470 MCARTHUR BLVD | BARNE | MA | 02532 | (508) 759-9500 | (508) 759-9100 |
| PIONEER ENVIRONMENTAL SVC LLC | 2753 W 31ST ST | CHICAGO | IL | 60608 | (773) 722-9200 | (773) 722-9201 |
| PRIME VENDOR INC | 4622 CEDAR AVE, BLDG 5, STE 123 | WILMINGTON | NC | 28403-6916 | (800) 746-9554 | (910) 726-1973 |
| SUSTAINMENT AND RESTORATION | 79 W MONROE STE 1119 | CHICAGO | IL | 60603 | (312) 220-7005 | |
| TECHLAW | 55 W MONROE, STE 3450 | CHICAGO | IL | 60603 | (312) 345-8966 | (312) 345-8979 |
| TESTAMERICA LABORATORIES INC | 2417 BOND ST | UNIVERSITY PARK | IL | 60466 | (708) 534-5200 | (708) 534-5211 |
| TETRA TECH INC | 1 S WACKER DR, STE 3700 | CHICAGO | IL | 60606 | (312) 201-7700 | (312) 201-0031 |