Texas Administrative Code › Title 30 - ENVIRONMENTAL QUALITY › Part 1 - TEXAS COMMISSION ON ENVIRONMENTAL QUALITY › Chapter 330 - MUNICIPAL SOLID WASTE › Subchapter J - GROUNDWATER MONITORING AND CORRECTIVE ACTION › Section 330.405 - Groundwater Sampling and Analysis Requirements

Current through Reg. 49, No. 28; July 12, 2024
(a) The groundwater monitoring program shall
				  include consistent sampling and analysis procedures that are designed to ensure
				  monitoring results that provide an accurate representation of groundwater
				  quality at the background and point of compliance wells, or other monitoring
				  system, installed in compliance with §330.403(a) - (c) of this title
				  (relating to Groundwater Monitoring Systems).
(b) The owner or operator shall submit a
				  groundwater sampling and analysis plan to the executive director for review and
				  approval prior to commencement of sampling and shall maintain a current copy in
				  the operating record. The groundwater sampling and analysis plan shall:
(1) include procedures and techniques for
				  sample collection, sample preservation and shipment, analytical procedures,
				  chain of custody controls, and quality assurance and quality control;
(2) provide for measurement of groundwater
				  elevations at each sampling point prior to bailing or purging; measurement at
				  an event shall be accomplished over a period of time short enough to avoid
				  temporal variations in water levels; sampling at each event shall proceed from
				  the point with the highest water-level elevation to those with successively
				  lower elevations unless contamination is known to be present, in which case
				  wells not likely to be contaminated shall be sampled prior to those that are
				  known to be contaminated unless an alternative procedure is approved by the
				  executive director; and
(3) include
				  sampling and analytical methods that are appropriate for groundwater sampling
				  and that accurately measure hazardous constituents and other monitoring
				  parameters in groundwater samples.
(A) For
				  Type I landfills, the owner or operator shall collect an appropriate number of
				  samples necessary to establish groundwater quality data consistent with the
				  appropriate statistical procedures determined in accordance with subsection (f)
				  of this section. The sampling procedures for Type I landfills shall be those
				  specified under §
												330.407(a)
				  of this title (relating to Detection Monitoring Program for Type I Landfills)
				  for detection monitoring, §330.409(b) - (f) of this title (relating to
				  Assessment Monitoring Program) for assessment monitoring, and §
												330.411(b)
				  of this title (relating to Assessment of Corrective Measures) for corrective
				  action.
(B) For Type IV landfills,
				  the owner or operator shall sample the groundwater monitoring parameters at the
				  frequency specified in §
												330.417
				  of this title (relating to Groundwater Monitoring at Type IV
				  Landfills).
(C) For other solid
				  waste management units that will have a groundwater monitoring program in
				  accordance with §330.401(a), of this title (relating to Applicability) the
				  executive director will specify groundwater monitoring parameters and
				  frequencies appropriate to the facility conditions.