hydrogeologic principles presented in the TEGD apply directly to permitted facilities as well

as to those in interim status, and are the basis for much of the guidance presented in this

Manual. Consequently, this Manual and the TEGD have a strong relationship and in certain

cases may be used together to provide support for regulatory and facility owner/operator

personnel. The contents of this Manual also are based on a review of the available open

literature, and on other existing Agency and State enforcement and permitting guidance

documents. In most cases, the procedures and methods presented in this Manual reflect

technical findings presented in other Agency guidance documents. In a few cases, the weight

of evidence in the open literature supports a deviation from the most recent Agency guidance.

As a result, some of the procedures and recommendations included in the TEGD and in

Chapter Eleven of SW 846 have been re evaluated based on current scientific findings, and

revised for inclusion in this Manual.

As stated previously, this Manual applies to permitted land disposal facilities operating

under 40 CFR Part 264. The TEGD, Chapter Eleven of SW 846, and this Manual are,

however, related thematically in terms of site characterization, monitoring well system design

and installation, and sampling and analysis. To the extent that this Manual provides more

current guidance on these ground water monitoring activities, those individuals presiding over

interim status facilities may wish to consult this Manual as a reference. In addition, the

following documents are key references for this Manual and are readily available to the

public:

Aller, L., T.W. Bennett, G. Hackett, R.J. Petty, J.H. Lehr, H. Sedoris, D.M.

Nielsen, and J.E. Denne. April 1989. Handbook of Suggested Practices for the

Design and Installation of Ground Water Monitoring Wells. EPA/EMSL Las

Vegas, USEPA Cooperative Agreement CR 812350 01, EPA/600/4 89/034,

NTIS #PB90 159807.

Barcelona, M.J., H.A. Wehrmann, M.R. Schock, M.E. Sievers, and J.R. Karny.

September 1989. Sampling Frequency for Ground Water Quality Monitoring.

EPA Project Summary, EPA/600/S4 89/032, NTIS #PB 89 233 522/AS.

Barcelona, M.J., J.P. Gibb, J.A. Helfrich, and E.E. Garske. September 1985.

Practical Guide for Ground Water Sampling. USEPA, Cooperative Agreement

#CR 809966 01, EPA/600/2 85/104.

USEPA. November 1991. Seminar Publication    Site Characterization for

Subsurface Remediation. EPA/625/4 91/026, 259 pp.

USEPA. July 1991. Handbook    Ground Water, Volume II: Methodology.

EPA/625/6 90/016b.

November 1992

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