Thirteen months after the California Energy Commission suspended Renewable Portfolio Standard eligibility for biomethane until it could be re-evaluated, the fuel\u2019s renewables portfolio standard eligibility has been restored. \tDuring its April 30 business meeting, the Energy Commission unanimously adopted revisions to the Renewables Portfolio Standard Eligibility Guidebook that address and implement the new RPS eligibility requirements for biomethane. \t\u201cIt does apply to every facility that participates in the [renewables portfolio standard], not just going forward,\u201d said Kate Zocchetti of the commission\u2019s Efficiency and Renewable Energy Division. \tIn the guidebook\u2019s seventh edition, which the commission approved this week, new requirements have been added for deliveries and use of biomethane, including tracking and verifying the quantities and sources of biomethane and the related environmental and renewable attributes. \tElectricity produced at biomethane facilities is eligible for the renewables portfolio standard if the fuel is derived from digester gas and\/or landfill gas. Biomethane may be converted to electricity at a generation facility that receives the biomethane in one of three ways: an onsite generating facility using a dedicated pipeline; an offsite generating facility using a dedicated pipeline; or an offsite generating facility using a common carrier pipeline. \tApplicants for facilities using a mixture of RPS eligible biomethane and conventional natural gas must apply as a multi-fuel facility. If biomethane is mixed with conventional natural gas for conditioning purposes, the mixed gas must meet all delivery requirements, though only the electricity attributable to the biomethane portion is considered RPS?eligible. \tAlso under the revised requirements, applicants must demonstrate for each biomethane source under a new biomethane procurement contract that the capture and injection of biomethane into a common carrier pipeline directly results in at least one of the following environmental benefits in California: * Reduction or avoidance of the emission of any criteria air pollutants; * Reduction or avoidance of pollutants that could have an adverse impact on any surface water or groundwater; and * Mitigating the emission of odors. \tApplicants of all electrical generation facilities using biomethane must submit a new application for certification or precertification, regardless of whether the facility is already certified, pre-certified, or pending certification, and provide all necessary documents within 90 days of the adoption of the seventh edition of this guidebook to maintain or establish its RPS status. A facility failing to do so will be suspended and procurement from the facility will not be eligible for the RPS until the suspension is resolved. New applications will not be accepted unless they are submitted in accordance with the latest version of the guidebook. \tAlso during the meeting, the commission awarded nearly $4 million to five research projects, ranging from energy storage and plug-in electric vehicle batteries to natural gas projects. The largest amount, a $1.7 million grant, goes to San Francisco-based Foresight Renewable Solutions for a demonstration of renewable energy management using a compressed air energy storage system. \tThe system\u2014to be located at a naval base in Ventura County\u2014would integrate solar photovoltaic technology to capture solar energy to compress air into above-ground tanks packaged in standard shipping containers. The stored, compressed air would then be used to generate electricity on an \u201con demand\u201d basis to meet the base\u2019s needs, including periods of high demand or grid outages. \tThe plan involves connecting the system to the state\u2019s electricity grid so that it would be capable of operating either in conjunction with the grid or independently. \tAlso, the University of California, Davis, was awarded $900,000 to investigate emissions and leakages within California\u2019s natural gas infrastructure. \tMeasurements will be taken for all significant possible sources of emissions and leaks, including the production, processing, transmission, and distribution of natural gas in buildings, neighborhoods, facilities and regional areas. \tFunding for the projects comes from the remaining funds in the commission\u2019s Public Interest Energy Research, or PIER, program, which is being wound down.