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STATE CONTRACTOR LICENSES:
AK: 225823, AR: 55507, AZ: ROC 353936, CA: 1132670, CT: MCO.0904787, DC: 410524000879, DE: DE-2024-000010671, FL: CCC1336237, ID: RCE-70843, IL: 104.02022, IA: C148251, KA: 24-006767, LA: 1428, MA: CSSL – 106323, MN: IR809782, MS: 26675-SC, NE: 54391-25, NM: 420730, NC: 104114, ND: 50738, OK: 80006813, OR: 252090, RI: CR-352, SC: CLG-125775, UT: 14083829-5501, VA: 2705191869, WA: OSRHOHC763NT, WV: WV64204

OSR HEADQUARTERS:
(847) 255-3600
6437 N AVONDALE AVE.
CHICAGO, IL 60631

OFFICE HOURS:
MONDAY-FRIDAY
8AM-5PM

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