Rhode Island Code of Regulations › Title 250 - Department of Environmental Management › Chapter 150 - Water Resources › Subchapter 05 - Water Quality › Part 3 - Groundwater Quality Rules › Section 250-RICR-150-05-3.12 - Determination of Compliance with Groundwater Quality Standards and Preventive Action Limits

Current through June 14, 2024
A. Compliance with
				  the groundwater quality standards and preventive action limits shall be
				  determined through analytical tests of unfiltered groundwater samples.
				  Groundwater quality samples shall be collected in a manner to be representative
				  of groundwater quality.
B.
				  Groundwater Monitoring
1. All facilities that
				  are required by the Director to monitor groundwater quality pursuant to these
				  Rules shall implement a groundwater monitoring plan approved by the Director.
				  Groundwater monitoring plans approved pursuant to other Rhode Island Department
				  of Environmental Management Rules and Regulations shall be exempt from this
				  requirement.
2. The groundwater
				  monitoring plan shall include, at minimum, the following:
a. A locus map using the U.S. Geological
				  Survey 7.5 minute quadrangle map;
b. Site plan at an appropriate scale (minimum
				  scale of 1 inch equals fifty feet (1"=50')) to adequately show the monitoring
				  well locations, well casing elevations, and the location on and immediately
				  surrounding the site of the following: property boundaries, buildings and other
				  structures, roads, surface topography, watercourses, wells, water lines, sewer
				  lines, onsite wastewater treatment systems and other waste disposal areas, and
				  any other significant site features;
c. A sufficient number of wells (minimum of
				  3) at the appropriate locations and depths to permit detection of any
				  pollutants in the groundwater;
d.
				  Well logs with detailed lithologic and well construction information; and
e. Sampling
				  schedule.
3. Monitoring
				  well construction shall be in compliance with the standards set forth in §
											3.22 of this
				  Part.
4. Minimum site monitoring
				  requirements:
a. The static water table
				  elevation shall be recorded at the time of monitoring; and
b. A log containing static water table
				  elevations and the sample analyses shall be maintained on-site by the facility
				  owner or operator.
5.
				  Copies of sample results and water table measurements shall be submitted to the
				  Director within 30 days of the receipt of such information by the facility
				  owner or operator.
6. An approved
				  groundwater monitoring plan shall be valid for a duration specified by the
				  Director.
7. There shall be no
				  change in a groundwater monitoring plan without the approval of the Director.
				  The Director may require a change in an approved monitoring plan where such
				  change is necessary to determine compliance with the groundwater quality
				  standards.
8. Any person
				  transferring ownership or control of a facility having an approved groundwater
				  monitoring plan shall notify the Director of such transfer not less than 30
				  days prior to the effective date of such transfer.
9. Groundwater monitoring required by the
				  Director shall not be terminated without the approval of the
				  Director.
10. When groundwater
				  monitoring has been terminated, the monitoring wells shall be abandoned in
				  accordance with the procedures established in §
											3.22 of this
				  Part.