We worked closely with the Landfill RNG team and the natural gas utility to establish design solutions for the full range of this project’s operating parameters and functions. A unique station pad layout was developed to integrate with the existing landfill grading, which required a narrow station with equipment located parallel to each side of the pad. Three-dimensional (3D) station modeling allowed our design team to produce multiple equipment arrangements to maximize station layout efficiencies in an easily presentable form. As a result, vehicle access is provided down the center of the facility allowing clear access to all equipment and processes for operation, maintenance and egress. In addition to Utility equipment, we provided an allowance for the Landfill installed inlet gas scrubber, isolation shut-in valve and flare bypass connection to be located immediately outside the M&R station fence.

This station utilizes an inlet gas sampling system tied directly to the station inlet shut-in isolation valve. This function was critical to preventing station piping and equipment from encountering off-spec gas, in the unlikely case of an upstream Landfill processing quality issue. Downstream of this shut-in control is an inlet coalescing filter/bypass and associated double-wall blowdown tank for any collected liquids.

Flow measurement is provided by a 4” ultrasonic meter located immediately upstream of the pressure/flow control. This control is provided by a parallel worker/monitor control valve allowing redundant systems suitable for various operating conditions. Both gas metering and regulation are housed in a single building to prevent operational issues resulting from inclement weather.

In addition to the over-pressurization protection (OPP) provided by the worker/monitor control valves, a station pressure relief valve is provided for additional OPP. Odorization is provided immediately downstream of the station check valve to meet pipeline odorization requirements. A 12” launcher provides the ability to clean and monitor the integrity of the pipeline, which was sized to allow for future capacity increases or pressure reduction.