California Code of Regulations › Title 22 - Social Security › Division 4.5 - Environmental Health Standards for the Management of Hazardous Waste › Chapter 14 - Standards for Owners and Operators of Hazardous Waste Transfer, Treatment, Storage, and Disposal Facilities › Article 6 - Water Quality Monitoring and Response Programs for Permitted Facilities › Section 66264.97 - General Water Quality Monitoring and System Requirements

Current through Register 2024 Notice Reg. No. 28, July 12, 2024
(a) The owner or operator shall comply with
				  the requirements of this section for any water quality monitoring program
				  developed to satisfy sections
				  66264.98,
				  66264.99 or
				  66264.100.
(b) Groundwater Monitoring System.
(1) Except as provided under subsection
				  (e)(3) of this section, the owner or operator shall establish a groundwater
				  monitoring system for each regulated unit. This groundwater monitoring system
				  shall include:
(A) a sufficient number of
				  background monitoring points installed at appropriate locations and depths to
				  yield groundwater samples from the uppermost aquifer that represent the quality
				  of groundwater that has not been affected by a release from the regulated
				  unit;
(B) for a detection
				  monitoring program under section
				  66264.98:
1. a sufficient number of monitoring points
				  installed at appropriate locations and depths to yield groundwater samples from
				  the uppermost aquifer that represent the quality of groundwater passing the
				  point of compliance and to allow for the detection of a release from the
				  regulated unit;
2. a sufficient
				  number of monitoring points installed at additional locations and depths to
				  yield groundwater samples from the uppermost aquifer as necessary to provide
				  the best assurance of the earliest possible detection of a release from the
				  regulated unit; and
3. a sufficient
				  number of monitoring points and background monitoring points installed at
				  appropriate locations and depths to yield groundwater samples from other
				  aquifers, low-yielding saturated zones and from zones of perched water as
				  necessary to provide the best assurance of the earliest possible detection of a
				  release from the regulated unit;
(C) for an evaluation monitoring program
				  under section
				  66264.99:
1. a sufficient number of monitoring points
				  installed at appropriate locations and depths to yield groundwater samples from
				  the uppermost aquifer that represent the quality of groundwater passing the
				  point of compliance, and at other locations in the uppermost aquifer as
				  necessary, to provide the data needed to evaluate changes in water quality due
				  to the release from the regulated unit; and
2. a sufficient number of monitoring points
				  and background monitoring points installed at appropriate locations and depths
				  to yield groundwater samples from other aquifers, low-yielding saturated zones
				  and zones of perched water as necessary to provide the data needed to evaluate
				  changes in water quality due to the release from the regulated
				  unit;
(D) for a
				  corrective action program under section
				  66264.100 of this article:
1. a sufficient number of monitoring points
				  installed at appropriate locations and depths to yield groundwater samples from
				  the uppermost aquifer that represent the quality of groundwater passing the
				  point of compliance, and at other locations in the uppermost aquifer as
				  necessary, to provide the data needed to evaluate compliance with the water
				  quality protection standard and to evaluate the effectiveness of the corrective
				  action program; and
2. a sufficient
				  number of monitoring points and background monitoring points installed at
				  appropriate locations and depths to yield groundwater samples from other
				  aquifers, low-yielding saturated zones and zones of perched water as necessary
				  to provide the data needed to evaluate compliance with the water quality
				  protection standard and to evaluate the effectiveness of the corrective action
				  program.