New Mexico Administrative Code
Title 20 - ENVIRONMENTAL PROTECTION
Chapter 5 - PETROLEUM STORAGE TANKS
Part 119 - CORRECTIVE ACTION FOR STORAGE TANK SYSTEMS CONTAINING PETROLEUM PRODUCTS
Section 20.5.119.1922 - CONCEPTUAL REMEDIATION PLAN
Universal Citation: 20 NM Admin Code 20.5.119.1922
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 on the surface of the water,
including in any excavation pit, or in any well;
(2) contaminant saturated soil is
present;
(3) concentrations of
contaminants of concern exceed site-specific target levels (SSTLs) in soil or
WQCC or EIB standards in groundwater or surface water;
(4) total petroleum hydrocarbons in soil meet
the criteria outlined 20.5.119.1914 NMAC; or
(5) 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 a timeline approved by the department or the timeline set forth in Subsection E of 20.5.119.1900 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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