| Company Name | Address | City | State | Zip Code | Phone Number | Fax Number |
| A3 ENVIRONMENTAL LLC | 3030 WARRENVILLE RD, STE 418 | LISLE | IL | 60532 | (630) 507-9014 | (630) 507-9003 |
| ABBOTT LOGISTICS INC | 2250 SOUTHWIND BLVD | BARTLETT | IL | 60103 | (630) 503-5000 | (630) 497-9800 |
| BBJ GROUP LLC | 140 S DEARBORN ST, STE 1520 | CHICAGO | IL | 60603 | (312) 644-8556 | (312) 644-8555 |
| BCE-USA LLC | 3500 MARTENS ST | FRANKLIN PARK | IL | 60131 | (815) 556-8037 | (815) 556-8076 |
| BIDNET | 20A RAILROAD AVE | ALBANY | NY | 12205 | (800) 677-1997 | (518) 438-0599 |
| BROWN & CALDWELL ENGINEERING | 141 W JACKSON BLVD, STE #300A | CHICAGO | IL | 60604 | (708) 870-6168 | (312) 483-2101 |
| CARNOW CONIBEAR & ASSOC LTD | 600 W VAN BUREN, STE 500 | CHICAGO | IL | 60607 | (312) 762-2930 | (312) 782-5145 |
| CIVIL & ENVIRONMENTAL | 1230 E DIEHL RD | NAPERVILLE | IL | 60563 | (630) 963-6026 | (630) 963-6027 |
| CRAWFORD MURPHY & TILLY INC (CMT) | 125 S WACKER DR, STE 2880 | CHICAGO | IL | 60606 | (312) 855-2540 | (999) 999-9999 |
| DELVE UNDERGROUND | 200 S WACKER DR | CHICAGO | IL | 60606 | (847) 322-9784 | (708) 512-4088 |
| E.REPUBLIC | 100 BLUE RAVINE RD | FOLSOM | CA | 95630 | (916) 932-1300 | (916) 932-1470 |
| ECS MIDWEST | 572 BARCLAY BLVD | BUFFALO GROVE | IL | 60089 | (224) 462-8515 | (708) 430-9854 |
| ENVIROBIDNET.COM | 24123 PEACHLAND BLVD C-4 310 | PORT CHARLOTTE | FL | 33954 | (888) 888-0900 | 999-999-9999 |
| ENVIRONMENTAL DESIGN INTERNATIONAL | 33 W MONROE ST, STE 1825 | CHICAGO | IL | 60603-5326 | (312) 345-8679 | (312) 345-0529 |
| FEHR-GRAHAM & ASSOCIATES LLC | 230 WOODLAWN AVE | AURORA | IL | 60506 | (815) 235-7643 | (630) 897-5696 |
| GEO BANCROFT ENGINEERING LLC | 3300 DUNDEE RD | NORTHBROOK | IL | 60062-2303 | (847) 952-9362 | (999) 999-9999 |
| GEO-ENVIRO CONSULTANTS INC | 7500 BURNING TREE DR | MCHENRY | IL | 60050 | (773) 562-6672 | (781) 810-9652 |
| GSG CONSULTANTS INC | 623 COOPER CT | SCHAUMBURG | IL | 60173 | (312) 733-6262 | (312) 733-5612 |
| HUFF & HUFF INC | 915 HARGER ROAD | OAK BROOK | IL | 60523 | (630) 684-9100 | (999) 999-9999 |
| INTEGRATED ENVIRONMENTAL | 1333 BURR RIDGE PKWY, STE 200 | BURR RIDGE | IL | 60527 | (708) 926-9588 | (708) 926-9251 |
| KIMLEY-HORN AND ASSOCIATES INC | PO BOX 856408 | MINNEAPOLIS | MN | 55485-6408 | (630) 487-3441 | (999) 999-9999 |
| LANGAN ENGINEERING, ENVIRONMENTAL, | 200 W MADISON ST, SUITE 1920 | CHICAGO | IL | 60606-9526 | (312) 547-7700 | (312) 547-7701 |
| MATTHEWS PROPERTY SERVICE | 3049 W JACKSON BLVD | CHICAGO | IL | 60612 | (708) 553-5181 | (000) 000-0000 |
| MICHAEL BAKER INTERNATIONAL INC | 200 W ADAMS ST, STE 1800 | CHICAGO | IL | 60606 | (312) 707-8770 | (312) 707-8804 |
| PIZZO & ASSOCIATES LTD | 10729 PINE RD | LELAND | IL | 60531 | (815) 498-9988 | (815) 498-4406 |
| PROFESSIONAL ENVIRONMENTAL ENGINEER | 2665 SCOTT AVE, SUITE B | SAINT LOUIS | MO | 63103 | (314) 531-0060 | (314) 531-0068 |
| SE3 LLC | 1111 BURLINGTON AVE, SUITE 111 | LISLE | IL | 60532 | (630) 641-9900 | (999) 999-9999 |
| SMARTPROCURE INC | 700 W HILLSBORO BLVD, STE 4-100 | DEERFIELD BEACH | FL | 33441 | (888) 998-8675 | (954) 399-7067 |
| SPECIALTY CONSULTING INC | 2942 W VAN BUREN ST | CHICAGO | IL | 60612 | (312) 319-7575 | (312) 319-7580 |
| SRN TESTING SERVICES | 2258 SOUTHWIND BLVD | BARTLETT | IL | 60103 | (630) 503-5002 | (630) 503-5002 |
| STANTEC CONSULTING SERVICES, INC. | 701 EAST 22ND ST | LOMBARD | IL | 60148 | (630) 576-9096 | (630) 576-1691 |
| TECHLAW | 55 W MONROE, STE 3450 | CHICAGO | IL | 60603 | (312) 345-8966 | (312) 345-8979 |
| TERRACON CONSULTANTS INC | 650 W LAKE ST, SUITE 420 | CHICAGO | IL | 60661 | (630) 445-0158 | (630) 953-9938 |
| TETRA TECH INC | 1 S WACKER DR, STE 3700 | CHICAGO | IL | 60606 | (312) 201-7700 | (312) 201-0031 |
| TRINITY CONSULTANTS | 12700 PARK CENTRAL DR, STE 2100 | DALLAS | TX | 75251 | (972) 661-8881 | (972) 385-9203 |
| 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 |
| WESTON SOLUTIONS, INC. | 300 KNIGHTSBRIDGE PARKWAY, SUITE 36 | LINCOLNSHIRE | IL | 60069 | 224-864-7201 | 224-864-7236 |
| WSP USA INC | 30 N LASALLE ST, SUITE 4200 | CHICAGO | IL | 60602 | (312) 347-7887 | (312) 782-1684 |