| Company Name | Address | City | State | Zip Code | Phone Number | Fax Number |
| A3 ENVIRONMENTAL LLC | 3030 WARRENVILLE RD, STE 418 | LISLE | IL | 60532 | (630) 935-4363 | |
| ANDREWS ENGINEERING INC | 420 EISENHOWER LANE NORTH | LOMBARD | IL | 60148 | (630) 953-3332 | (999) 999-9999 |
| APTIM ENVIRONMENTAL & | 1607 E MAIN ST, STE E | ST CHARLES | IL | 60174 | (630) 762-1400 | (630) 762-1402 |
| ARCADIS | 200 S MICHIGAN AVE, STE 2000 | CHICAGO | IL | 60604 | (312) 917-1000 | (312) 917-1572 |
| ATLAS TECHNICAL CONSULTANTS | 1815 S MEYERS RD, SUITE 1050 | OAKBROOK TERRACE | IL | 60181 | (630) 613-3916 | (630) 613-1227 |
| BIDNET | 20A RAILROAD AVE | ALBANY | NY | 12205 | (800) 677-1997 | (518) 438-0599 |
| 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 |
| CARNOW CONIBEAR & ASSOC LTD | 600 W VAN BUREN, STE 500 | CHICAGO | IL | 60607 | (312) 762-2930 | (312) 782-5145 |
| CONSTRUCT CONNECT | 30 TECHNOLOGY PKWY S, STE 100 | NORCROSS | GA | 30092 | (800) 364-2059 | (866) 570-8187 |
| ENVIROBIDNET.COM | 24123 PEACHLAND BLVD C-4 310 | PORT CHARLOTTE | FL | 33954 | (888) 888-0900 | |
| GEOSYNTEC CONSULTANTS INC | 134 N LASALLE ST, STE 300 | CHICAGO | IL | 60602 | (312) 658-0500 | (866) 783-5766 |
| GREEN LIGHT | 10412 S SEELEY | CHICAGO | IL | 60643 | (773) 447-9463 | (773) 681-7285 |
| GSG CONSULTANTS INC | 623 COOPER CT | SCHAUMBURG | IL | 60173 | (312) 733-6262 | (312) 733-5612 |
| HEY & ASSOCIATES INC | 26575 W COMMERCE DR, STE 601 | VOLO | IL | 60073 | (847) 740-0888 | (847) 740-2888 |
| HUFF & HUFF INC | 915 HARGER ROAD | OAK BROOK | IL | 60523 | (630) 684-9100 | |
| IES SOLUTION | 13435 KOLMAR AVE | CRESTWOOD | IL | 60445 | (708) 926-9588 | (708) 926-9251 |
| INTERRA INC | 600 TERRITORIAL DR, STE G | BOLINGBROOK | IL | 60440 | (630) 754-8700 | (630) 754-8705 |
| JACOB & HEFNER ASSOCIATES INC | 1333 BUTTERFIELD RD STE 300 | DOWNERS GROVE | IL | 60515 | (630) 652-4600 | (630) 652-4601 |
| KALGEN CONSULTANTS INC | 1940 INTERNATIONALE PKWY, STE 600 | WOODRIDGE | IL | 60517 | (630) 516-0901 | (630) 516-0902 |
| MICHAEL BAKER INTERNATIONAL INC | 200 W ADAMS ST, STE 1800 | CHICAGO | IL | 60606 | (312) 707-8770 | (312) 707-8804 |
| MILHOUSE ENGINEERING & | 333 S WABASH AVE, STE 2901 | CHICAGO | IL | 60604 | (773) 661-8437 | (630) 519-4527 |
| PARTNER ASSESSMENT CORP | 450 E 22ND ST, STE 120 | LOMBARD | IL | 60148 | (310) 220-6254 | (773-453-4292 |
| 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 |
| PROFESSIONAL ENVIRONMENTAL | 2665 SCOTT AVE, SUITE B | SAINT LOUIS | MO | 63103 | (314) 531-0060 | (314) 531-0068 |
| RAMBOLL US CONSULTING | 333 W WACKER DR, SUITE 2700 | CHICAGO | IL | 60606 | (312) 288-3800 | (312) 288-3801 |
| SMARTPROCURE INC | 700 W HILLSBORO BLVD, STE 4-100 | DEERFIELD BEACH | FL | 33441 | (888) 998-8675 | (954) 399-7067 |
| STANTEC | 350 N ORLEANS ST, SUITE 1301 | CHICAGO | IL | 60654 | (312) 831-3000 | (312) 831-3999 |
| TECHLAW | 55 W MONROE, STE 3450 | CHICAGO | IL | 60603 | (312) 345-8966 | (312) 345-8979 |
| TETRA TECH INC | 1 S WACKER DR, STE 3700 | CHICAGO | IL | 60606 | (312) 201-7700 | (312) 201-0031 |
| V3 COMPANIES LTD, D/B/A V3 WETLAND | 7325 JANES AVE | WOODRIDGE | IL | 60517 | (630) 724-9200 | (630) 724-9202 |
| WEAVER CONSULTANTS GROUP NORTH | 35 E WACKER DR, STE 1250 | CHICAGO | IL | 60622 | (312) 922-1030 | (312) 922-0201 |