Current through Register Vol. 35, No. 23, December 10, 2024
Section 20.5.120.2019 - CONCEPTUAL REMEDIATION PLANA. 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.N.M. Admin. Code § 20.5.120.2019
Adopted by New Mexico Register, Volume XXIX, Issue 14, July 24, 2018, eff. 7/24/2018