WALLINGFORD — O&G Industries, the largest privately held construction firm in Connecticut, is moving into a new 9,992-square-footoffice space at 900 Northrop Road, the firm announced recently.The office is within close proximity toI-91 North and South. The move comes after the state awarded O&G a major contract to carry out the reconfiguration project of I-91,1-691-and Route 15 Interchange in Meriden. Choyce Peterson Commercial Real Estate Specialists carried out the lease negotiations on behalf of O&G and the Connecticut Department of Transportation.To better coordinate the construction efforts, the Torrington-based firm sought out a centrally located office much closer to the interstates where they would be housing their Heavy Highways Division staff overseeing the project until its completion.