Our Core Values. Our Beliefs. We deliver quality solutions with integrity and expertise, every time. CGRS began in 1987 as an environmental consulting company, providing industry- and regulatory-compliance expertise and services to owners and operators in the upstream and downstream petroleum industry. Over time we have diversified to meet the ever-changing customer needs by becoming experts in the markets of Environmental Services , Liquid and CNG Fueling , Oil & Gas , and Water and Wastewater . As an environmental consulting company, our expertise is multifaceted: we have subject matter experts in diverse yet synergistic areas, and are truly a one-stop shop for our customers. For a more in depth look at everything we offer, download our updated services summary here . CGRS, Inc. began its environmental-compliance journey in 1987 as a leak-detection services company for owners and operators of underground petroleum tank systems. Forthcoming EPA regulations β 40 CFR 280 β were to require regular testing of underground storage tanks (UST) systems for leaks.