New Mexico Administrative Code
Title 20 - ENVIRONMENTAL PROTECTION
Chapter 5 - PETROLEUM STORAGE TANKS
Part 120 - CORRECTIVE ACTION FOR UST SYSTEMS CONTAINING OTHER REGULATED SUBSTANCES
Section 20.5.120.2019 - CONCEPTUAL REMEDIATION PLAN
Universal Citation: 20 NM Admin Code 20.5.120.2019
Current through Register Vol. 35, No. 6, March 26, 2024
A. If approved by the department, owners and operators shall submit a conceptual remediation plan to the department if any of the following conditions have been identified at the site:
(1) a thickness of
greater than one-eighth inch of NAPL is present in the water, including in any
excavation pit, or in any well;
(2)
contaminant saturated soil is present;
(3) concentrations of contaminants of concern
exceed target concentrations in soil or WQCC or EIB standards in groundwater or
surface water; or
(4) other
conditions exist as a result of the release which threaten public health,
safety and welfare or the environment, as determined by the
department.
B. All remediation plans shall include but are not limited to methods to mitigate, remove or otherwise remediate the contaminant source areas.
C. Owners and operators shall submit the conceptual remediation plan in accordance with this section and with a timeline approved by the department or the timeline set forth in Subsection E of 20.5.120.2000 NMAC.
(1) The conceptual
remediation plan shall provide a written description of all of the
methodologies proposed and discuss how the plan will achieve target
concentrations and other goals of remedial action in a manner that is
practicable, cost effective, and protective of public health, safety and
welfare and the environment. Owners and operators shall obtain department
approval for the conceptual remediation plan before developing the final
remediation plan.
(2) The
conceptual remediation plan, at a minimum and as appropriate, shall include:
(a) a concise description of site conditions,
including hydrogeology, contaminant characteristics and plume
dynamics;
(b) the recommended
approach to remediation and justification for the recommendation;
(c) a clear description of the goals of
remediation and the target concentrations to be met in each medium;
(d) a narrative description of the proposed
methodologies including a preliminary cost comparison and time lines for
achieving goals of remediation;
(e)
a cost estimate of implementation including installation, operation and
maintenance, and monitoring;
(f) a
schematic diagram of the proposed remediation system or treatment area and a
narrative description of its operation;
(g) a plan view, to scale, of the site
showing locations of the proposed equipment or excavation boundaries in
relation to the site's physical features and contaminant plumes;
(h) a description of how the approach will
achieve target concentrations and other goals of remediation; and
(i) a description of additional data required
to support the conceptual remediation plan and design of the final plan and how
it will be collected.
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