Northern California’s top contractor specializing in HVAC/Ventilation, Sheet Metal, Odor Control, and Environmental Controls for Water & Wastewater Treatment Facilities Services HVAC & Ventilation Learn more Sheet Metal Learn more Odor Control Learn more HVAC Controls Learn more About Us. James Long Construction Services was established is 1990 and has been Northern California’s leader for Water & Wastewater Treatment Facilities HVAC/Ventilation for over 30 years. Read more