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2017 Report On The Building Service Contractor Market — Member Content
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Cleaning Topic: Learn About os1


– November 2011
Dixon Boosts Clean with (OS1)
Certification audit showcases safety and green opportunities for one middle school

– April 2011
Third-Party Green Certifications Lead To New Opportunities
An overview of LEED AP, GS-42, CIMS-GB and (OS1) certifications

CERTIFICATION – July 2008
Certifications For BSCs Elevating The Industry
Third-party cleaning certifications growing in popularity among BSCs