| Company Name | Address | City | State | Zip Code | Phone Number | Fax Number |
| AMERICAN SURVEYING & ENGINEERING PC | 200 N LASALLE ST, STE 2650 | CHICAGO | IL | 60601 | (312) 277-2000 | (815) 288-6277 |
| BADGER DAYLIGHTING CORP | 4910 N 900 E | BROWNSBURG | IN | 46112 | (317) 456-1050 | (877) 741-3134 |
| BCE-USA LLC | 3500 MARTENS ST | FRANKLIN PARK | IL | 60131 | (815) 556-8037 | (815) 556-8076 |
| BIDNET | 15 BRITISH AMERICAN BLVD | LATHAM | NY | 12110 | (518) 438-009... | (518) 689-7038 |
| CHICAGOLAND | PO BOX 3533 | PEORIA | IL | 61612 | (309) 401-6167 | (309) 401-6168 |
| DUKES ROOT CONTROL INC | 400 AIRPORT RD, STE E | ELGIN | IL | 60123 | (800) 447-6687 | |
| ECOANALYSTS INC | 1420 S BLAINE ST, STE 14 | MOSCOW | ID | 83843-3973 | (208) 882-2588 | (208) 883-4288 |
| ERA, A WATERS CO | 16341 TABLE MOUNTAIN PKWY | GOLDEN | CO | 80403 | (800) 372-0122 | (303) 421-0159 |
| HBK ENGINEERING LLC | 921 W VANBUREN, STE 100 | CHICAGO | IL | 60607 | (312) 432-0076 | (312) 432-0231 |
| K2 CORROSION ENGINEERING LLC | 5397 E 1700TH AVE | WHEELER | IL | 62479 | (217) 683-2393 | (999) 999-9999 |
| KARA CO INC | 5255 DANSHER RD | COUNTRYSIDE | IL | 60525 | (708) 482-888... | (708) 482-7171 |
| MSCH CORPORATION | 2200 LANDMEIER RD | ELK GROVE VILLAGE | IL | 60007 | (847) 293-5444 | 999-999-9999 |
| NORTH AMERICA PROCUREMENT COUNCIL | P O BOX 40445 | GRAND JUNCTION | CO | 81504 | (302) 450-1923 | (302) 450-1925 |
| ONE CALL CONCEPTS LOCATING SERVICES | 7223 PARKWAY DRIVE, STE 200 | HANOVER | MD | 21076 | 443-783-0080 | 410-712-0544 |
| PRIME VENDOR INC | 4622 CEDAR AVE, BLDG 5, STE 123 | WILMINGTON | NC | 28403-6916 | (800) 746-9554 | (910) 726-1973 |
| SMARTPROCURE INC | 700 W HILLSBORO BLVD, STE 4-100 | DEERFIELD BEACH | FL | 33441 | (888) 998-8675 | (954) 399-7067 |
| STAKE CENTER LOCATING LLC | 7027 ALBERT PICK RD. STE 200 | GREENSBORO | NC | 27409 | 605-777-4441 | 336-664-5937 |
| UNDERGROUND PIPE SOLUTIONS LLC | 8113 46TH STREET | LYONS | IL | 60534 | (312) 277-4445 | (312) 277-8916 |
| USIC LOCATING SERVICES LLC | 9045 N RIVER RD | INDIANAPOLIS | IN | 46240 | (317) 575-7800 | (317) 575-7888 |
| V3 COMPANIES LTD, D/B/A V3 WETLAND | 7325 JANES AVE | WOODRIDGE | IL | 60517 | (630) 724-9200 | (630) 724-9202 |