Guam EPA board adopts revised septic-tank regulations, formalizes holding-tank limits and permit requirements

The Guam Environmental Protection Agency Board of Directors approved revised septic-tank rules (22 GAR Division 2, Chapter 12) at its Aug. 21 regular meeting, adopting updated definitions, new operating‑permit requirements and conditions for holding tanks and Type 4 toilet systems.

Board Chair Stephen Carvalito called for a vote after discussion and a motion to adopt the regulations. Board member Steven Kerr moved to approve the revised Chapter 12 regulations; a second was recorded. Chair Carvalito then announced the motion carried and said, “Regulations passed.”

The regulations update language and cross‑references and restore an alphabetized definitions section, agency staff told the board. A presenter identified in the record as a staff member summarized the changes, saying they replaced older terms such as “leaching fields” with “soil absorption system” and removed duplicative language by pointing to existing Guam law where appropriate. The staff member noted, “When you see where we say we added references or we replaced with a reference to, that's just what I mean there.”

Why it matters: the revisions set clearer technical standards for advanced on‑site systems and tightening of permitting controls intended to reduce the risk of septage leaching into coastal waters and groundwater. Board discussion focused on when holding tanks may be permitted, how Type 4 systems will be maintained and inspected, lot‑size limits in groundwater protection zones, and how fee revenue will be used to staff program needs.

Key changes and requirements

- Definitions and cross‑references: The draft restores an alphabetized definitions section and adds citations to Guam law to avoid duplicative wording, agency staff said. The board…