California Code of Regulations › Title 23 - Waters › Division 3 - State Water Resources Control Board and Regional Water Quality Control Boards › Chapter 15 - Discharges of Hazardous Waste to Land › Article 5 - Water Quality Monitoring and Response Programs for Waste Management Units › Section 2550.7 - General Water Quality Monitoring and System Requirements

Current through Register 2024 Notice Reg. No. 28, July 12, 2024
(a) The
				  discharger shall comply with the requirements of this section for any water
				  quality monitoring program developed to satisfy sections
				  2550.8,
				  2550.9, or
				  2550.10 of this article.
(b) Ground Water Monitoring System.
(1) Except as provided under subsection
				  (e)(3) of this section, the discharger shall establish a ground water
				  monitoring system for each waste management unit. This ground water monitoring
				  system shall include:
(A) for all monitoring
				  and response programs, a sufficient number of background monitoring points
				  installed at appropriate locations and depths to yield ground water samples
				  from the uppermost aquifer that represent the quality of ground water that has
				  not been affected by a release from the waste management unit;
(B) for a detection monitoring program under
				  section 2550.8 of this article:
1. a sufficient number of monitoring points
				  installed at appropriate locations and depths to yield ground water samples
				  from the uppermost aquifer that represent the quality of ground water passing
				  the point of compliance and to allow for the detection of a release from the
				  waste management unit;
2. a
				  sufficient number of monitoring points installed at additional locations and
				  depths to yield ground water samples from the uppermost aquifer to provide the
				  best assurance of the earliest possible detection of a release from the waste
				  management unit;
3. a sufficient
				  number of monitoring points and background monitoring points installed at
				  appropriate locations and depths to yield ground water samples from portions of
				  the zone of saturation, including other aquifers, not monitored pursuant to
				  subsections (b)(1)(B)1. and (b)(1)(B)2. of this section to provide the best
				  assurance of the earliest possible detection of a release from the waste
				  management unit;
4. a sufficient
				  number of monitoring points and background monitoring points installed at
				  appropriate locations and depths to yield ground water samples from zones of
				  perched water to provide the best assurance of the earliest possible detection
				  of a release from the waste management unit; and
5. monitoring point locations and depths that
				  include the zone(s) of highest hydraulic conductivity in each ground water body
				  monitored pursuant to this subsection.
(C) for an evaluation monitoring program
				  under section
				  2550.9 of this article:
1. a sufficient number of monitoring points
				  installed at appropriate locations and depths to yield ground water samples
				  from the uppermost aquifer that represent the quality of ground water passing
				  the point of compliance and at other locations in the uppermost aquifer to
				  provide the data needed to evaluate changes in water quality due to the release
				  from the waste management unit;
2.
				  a sufficient number of monitoring points and background monitoring points
				  installed at appropriate locations and depths to yield ground water samples
				  from portions of the zone of saturation, including other aquifers, not
				  monitored pursuant to subsection (b)(1)(C)1. of this section to provide the
				  data needed to evaluate changes in water quality due to the release from the
				  waste management unit; and
3. a
				  sufficient number of monitoring points and background monitoring points
				  installed at appropriate locations and depths to yield ground water samples
				  from zones of perched water to provide the data needed to evaluate changes in
				  water quality due to the release from the waste management unit;
				  and
(D) for a corrective
				  action program under section
				  2550.10 of this article:
1. a sufficient number of monitoring points
				  installed at appropriate locations and depths to yield ground water samples
				  from the uppermost aquifer that represent the quality of ground water passing
				  the point of compliance and at other locations in the uppermost aquifer to
				  provide the data needed to evaluate the effectiveness of the corrective action
				  program;
2. a sufficient number of
				  monitoring points and background monitoring points installed at appropriate
				  locations and depths to yield ground water samples from portions of the zone of
				  saturation, including other aquifers, not monitored pursuant to
				  subsection(b)(1)(D)1. of this section to provide the data needed to evaluate
				  the effectiveness of the corrective action program; and
3. a sufficient number of monitoring points
				  and background monitoring points installed at appropriate locations and depths
				  to yield ground water samples from zones of perched water to provide the data
				  needed to evaluate the effectiveness of the corrective action
				  program.