In April 2012, Karbone reported the suspension of biomethane injected into the natural gas pipeline system as an RPS resource. On September 27 2012, Governor Brown signed into law AB 1900 and AB 2196. Together, these bills fix liability concerns that previously inhibited landfill gas pipeline injection, while giving full RPS eligibility to electricity generation from pipeline injected biomethane, assuming several criteria metrics are met and CEC certification is obtained.
On the back of significant bipartisan lobbying regarding the advantages and disadvantages of biomethane as an RPS resource under the new RPS Senate Bill SBX2, on March 28th 2012, the California Energy Commission held a workshop to consider the suspension of the RPS eligibility guidelines related to biomethane. The suspension would apply to power plants that are currently RPS certified or pre-certified to use biomethane and those that are not.