Under contract with the County of San Luis Obispo, Planning and Building Department (County), Aspen is assisting the County with application review, environmental review, and support with multi-agency coordination for the decommissioning of the Diablo Canyon Power Plant (DCPP), a nuclear energy power plant off the coast of San Luis Obispo County.

Aspen prepared an EIR on behalf of San Luis Obispo County for the CVSR proposed by SunPower Corporation. SunPower proposed to con­struct and operate a controversial 250 MW solar photovoltaic power plant on approxi­mately 4,000 acres of rangeland in the Carrizo Plain, an unincorpo­rated portion of eastern San Luis Obispo County.

In February 2014, Aspen, as a subcontractor to PMC, prepared the County of San Luis Obispo Renewable Energy Streamlining Program (RESP) Opportunities and Constraints Tech­nical Study (OCTS).

Aspen managed the preparation of an Environmental Impact Report (EIR) for the Topaz Solar Farm proposed by Topaz Solar Farms LLC, a wholly owned subsidiary of First Solar, Inc.