1.2
Relationship of this Manual to the Regulations and to Other Documents
The regulations in Subpart F and 40 CFR Part 270 will continue to be the primary
location of the performance standards for ground water monitoring, and the hazardous waste
permit information requirements, respectively. This Manual serves to elaborate upon the
applicable requirements and available options for meeting the performance standards. While
directly applicable only to monitoring regulated units at permitted RCRA facilities, the
contents of this Manual may provide useful guidance for other Agency ground water
monitoring programs as well, particularly municipal solid waste landfills regulated under 40
CFR Part 258, RCRA facilities that are in interim status (regulated under 40 CFR Part 265),
RCRA facilities that are implementing the corrective action process for solid waste
management units (40 CFR Part 264  264.101), and hydrogeologic investigations at
Superfund sites. The information contained in this Manual also could be useful for the design
and operation of ground water monitoring systems required by any regulatory program (e.g.,
Toxic Substances Control Act).
In September 1986 the Agency released two documents relating to RCRA ground 
water monitoring: The RCRA Ground Water Monitoring Technical Enforcement Guidance
Document (TEGD) and "Chapter Eleven   Ground Water Monitoring" of EPA's manual titled
Test Methods for Evaluating Solid Waste (USEPA 1986c, commonly known as "SW 846").
The TEGD was distributed by the Office of Waste Programs Enforcement (OWPE) and is the
most recent USEPA guidance document that specifically addresses RCRA ground water
monitoring. The TEGD is presently available from the National Technical Information
Service (703/487 4650) as document number PB87 107 751 and from the Government
Printing Office (202/783 3238) as document number GPO:055 000 00 260 6. SW 846 is
developed by the Office of Solid Waste and provides sampling and analysis methodology
related to compliance with RCRA regulations. SW 846 is distributed through the Government
Printing Office as document number GPO:955 001 00000 1 .
This Manual has been developed by the Agency to update and supplement information
contained in the TEGD and Chapter Eleven of SW 846 to assist the regulated community in
addressing the requirements Subpart F. The TEGD provides guidance for interim status
facilities that have not received an operating permit and are thus subject to the requirements
specified under 40 CFR Part 265. Whereas the TEGD was written primarily for the use of
enforcement officials when implementing the interim status provisions, 40 CFR  265.90 et
seq, this Manual was written to assist and direct owners and operators of permitted facilities
in the design and implementation of ground water monitoring programs. Although written for
use by owners and operators of permitted facilities, Chapter Eleven of SW 846 was not
intended to function as a comprehensive guide for ground water monitoring; rather, it is a
short listing of ground water monitoring protocols.
The Agency recognizes that the science of ground water monitoring is advancing and
therefore, has issued this Manual to present viable new methodologies. Most of the
November 1992
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