Introduction
Alternative Ground Water
Sampling Techniques Guide (July 1994)
The New Jersey Department of Environmental
Protection (NJDEP) Site Remediation Program is committed
to streamlining and expediting the investigation and remediation
of contaminated sites. To achieve this goal, the Alternative
Ground Water Sampling Techniques Guide has been developed
to assist investigators in evaluating ground water during
a site investigation and reduce the time and money spent
on the installation of monitor wells. The use of the alternative
methods described in this guide will allow for a greater
number of ground water samples to be collected at a reduced
cost per sample. A larger data base will in turn guide the
investigation and provide a greater understanding of the
distribution of ground water contamination, leading to more
effective placement of monitor wells and subsequent remedial
decisions.
The guide provides a compilation of six (6) alternative
methods for the acquisition of ground water samples in lieu
of monitor well installation. These methods are presented
in standard format and include detailed procedures for equipment
installation, sampling, QA/QC, and a description of their
advantages and limitations. Based upon site specific objectives
and targeted levels of data quality, data obtained with
these methods may be used as a screening tool to reduce
the number and optimize the placement of monitor wells and
may also be accepted on a case by case basis as stand alone
data points of ground water evaluation. The actual representativeness
and subsequent acceptability of the associated data is dependent
upon site conditions, application of the sampling method,
experience of the sampling team and the remedial decision
to be made.
The guide is intended for use by the regulated
community and consultants to implement rapid and technically
sound site investigations. Users of the Alternative Ground
Water Sampling Techniques Guide will be most successful
when used in conjunction with the NJDEPE Field Sampling
Procedures Manual and the Site Remediation Program Field
Analysis Manual.
Procedures for the use of alternative sampling
methods are requirements referenced in Sections 1.6(c) and
(d) in the current Technical Requirements
for Site Remediation (N.J.A.C. 7:26E). Section 1.6(c)
designates criteria which the alternative ground water sampling
method must satisfy when used without NJDEP approval as
allowed by N.J.A.C. 7:26E. To use the alternative methods
with NJDEP approval, a NJDEP variance must be obtained.
The procedures for obtaining a variance and the criteria
which must be met are described in section 1.6(d). The reader
is cautioned that site-specific conditions must be evaluated
on a case by case basis to determine applicability of a
particular method. It is also strongly suggested that a
consultation occur with the NJDEP Case Manager to discuss
the intended use of a particular method prior to implementation.
Prior drafts of this document have been previously distributed
for review and comment within the NJDEP and the regulated
community. The Alternative Ground Water Sample Techniques
Guide will be updated regularly to reflect changes in the
rapidly growing area of environmental monitoring and measurement
technology.
The Alternative Ground Water Sampling Techniques Guide
may be reproduced without NJDEP authorization. Comments
on the document are encouraged and may be addressed to:
Charles Van Sciver
NJDEP/Division of Publicly Funded Site Remediation
Bureau of Environmental Measurement & Quality Assurance
25 Arctic Parkway, P.O. Box 413
Trenton, NJ 08625
(609) 984-1693
Fax: (609) 292-3244
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Disclaimer
This document was prepared by the New Jersey Department
of Environmental Protection (NJDEP), Site Remediation Program (SRP)
and has been subject to peer review. Mention of trade names or commercial
products does not constitute an endorsement or recommendation for
use.
Acknowledgements
The author would like to express his sincere appreciation
for the review and comments to initial drafts of this document made
by personnel within and outside the Department.
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