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Categorical exclusion · example

San Carlos Hospital Community Microgrid

DOE would fund the San Carlos Apache Tribe to design and install a microgrid with a battery energy storage system, a 750 kW solar array and a controller. The PV array location changed from the earlier review: mostly rooftop, the rest ground-mounted.2

Facts from U.S. Department of Energy public records, each linked by number to its source; checked November 13, 2026. Section notes by ePlan.

At a glance

Where
SCA Healthcare Corporation campus in Peridot, Arizona. The battery and controller go on disturbed ground next to an existing building; most solar panels go on the logistics building roof, the rest in the south part of campus.2
Size
About 1 MW battery storage system and 750 kW solar PV array; the array is about one-fifth of the area of the original proposal.2
Lead agency
U.S. Department of Energy, Office of Energy Efficiency and Renewable Energy (NEPA Compliance Officer; Office of Indian Energy Policy and Programs)2
Review
Categorical exclusion, documented in a NEPA determination2
Legal citation
DOE categorical exclusions B4.14 (electrochemical-battery or flywheel energy storage systems) and B5.16 (solar photovoltaic systems), Appendix B to 10 CFR Part 10212
Status
NEPA determination signed February 11, 20262

Timeline

  1. USFWS concurrence of no effect2
  2. Previous NEPA determination signed2
  3. NEPA determination signed2

Documents U.S. Department of Energy published

What the documents say

CX-270928.pdf

Rationale for determination
Describes the microgrid at the Peridot campus, the revised mostly rooftop PV layout, Section 106 concurrence, USFWS no-effect finding, no wetlands or floodplain, and no significant impacts expected.2
For Categorical Exclusion Determinations
States the project fits Appendix B classes, has no extraordinary circumstances, was not segmented, and is categorically excluded from further NEPA review.2
NEPA Provision
Final determination requires an agreement condition to stop work and notify the Historic Preservation Office and DOE Project Officer if archaeological materials are found.2

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A project like San Carlos Hospital Community Microgrid? Describe yours and ePlan drafts the categorical exclusion memo (or short EA) in the agency's format. Where will the project happen?

More examples

NEPA Categorical Exclusion Memo · All Federal NEPA projects

Sources

  1. DOE NEPA categorical exclusion determination pageenergy.gov
  2. CX-270928.pdfenergy.gov