Rhode Island Code of Regulations › Title 250 - Department of Environmental Management › Chapter 140 - Waste and Materials Management › Subchapter 05 - Solid Waste › Part 6 - Solid Waste Regulation No.6 Petroleum Contaminated Soil Processing Facility › Section 250-RICR-140-05-6.5 - Field Sampling to Provide Analytical Data for Evaluation of Candidate Soil (Per Section 6.2(A) of this Part)

Current through June 14, 2024
A. The following
				  represents a minimal sampling and testing strategy. Additional sampling may be
				  required at a given site, on a case-by-case basis, to adequately characterize
				  the contaminated soil and to minimize the potential of accepting hazardous
				  materials or materials that the soil processor is not permitted to accept.
1. Scenario 1: For projects where
				  contaminated soil has been excavated and stockpiled and where the piles are
				  "homogeneous" or "heterogeneous" defined as follows:
a. Homogeneous Pile or Site - A contaminated
				  soil pile or site, where it is known or suspected that only one type of spill
				  material (contaminant) has occurred either in a single spill or leak or
				  multiple spills or leaks. Also, the pile or site has an appearance of being
				  approximately evenly contaminated (approximately same concentration of
				  contaminant throughout) based on visual observation and/or using portable
				  contaminant monitoring devices.
b.
				  Heterogeneous Pile or Site - A contaminated pile or site, where it is known or
				  suspected that one or more spills of one type of spill material (contaminant)
				  has occurred in a defined area or sector of the pile or site, while one or more
				  spills of a second type of spill material has occurred in a different, defined
				  area or sector of the pile or site. Or
c. A contaminated pile or site, where there
				  are visual differences in the appearance of spill material in different,
				  defined areas or sectors of the pile or site and/or where contaminant
				  monitoring devices provide significantly different readings in different,
				  defined areas or sectors of the pile or site such that:
(1) There is a potential that different spill
				  materials (contaminants) exist in separate, defined areas of the pile or site
				  or
(2) It is likely that the
				  concentration of contaminant of a single type varies significantly in separate,
				  defined areas of the pile or site.
d. Case 1 - Homogeneous Pile or Site:
(1) Divide the overall pile (on paper) into
				  grid segments of 20 cubic yards each, when looked at a three dimensional view.
				  In each grid segment, collect one grab sample at a depth of at least two feet.
				  Collect it from the area of the grid segment that appears to have the highest
				  concentration of contaminant, per visual observation. Alternately, if the
				  concentration of contaminant throughout the grid segment is uniform, i.e., no
				  discernible difference per visual observation, then collect it from the
				  mid-point of the grid segment.
(2)
				  If the contaminated pile is arranged such that the above grid segment plan and
				  sampling approach cannot be applied, then an alternate method can be used,
				  provided approval is obtained from the Solid Waste Section of the RIDEM Office
				  of Land Revitalization and Sustainable Materials Management.
(3) In the laboratory, half of each of the
				  five grab samples from five adjacent grids will be composited into one sample
				  for test purposes and to represent that cumulative 100 cubic yards of soil.
				  (Therefore, there will be one composite sample and one set of lab tests for
				  each 100 cubic yard of soil, or portion thereof). If any of the composite
				  sample's test indicate a problem (hazardous waste characteristics, material not
				  acceptable per the applicant's permit, etc.) then the soil processor shall have
				  several options:
(AA) Reject the entire pile
				  at the site or
(BB) Reject the
				  entire 100 cubic yard of soil associated with each composite that has the
				  problem or
(CC) Re-test each
				  individual grab sample within the 100 cubic yard sector(s) that has the
				  problem, to determine if the problem can be isolated to a give grid segment
				  (and thus being able to accept other grid segments within that 100 cubic yard
				  sector).
e.
				  Case 2 - Heterogeneous Pile or Site
(1) The
				  procedures to be used are the same as in Case 1 for homogeneous piles or sites,
				  except for the following:
(AA) Layout the
				  grid network in a manner that maximizes the number of adjacent grids that are
				  known or suspected to be homogeneous with one another.
(BB) In the laboratory, compositing, for test
				  purposes, will be performed on grab samples from adjacent grids that are known
				  or suspected to be homogeneous with one another. Therefore, each composite will
				  consist of a minimum of one grab sample (from a grid that is known or suspected
				  to be heterogeneous relative to adjacent grids) to a maximum of five grab
				  samples (all known or suspected to be homogeneous with one another). Thus,
				  there will be one composite sample and one set of lab tests for a maximum of
				  each 100 cubic yards of soil.