ML20071L151
| ML20071L151 | |
| Person / Time | |
|---|---|
| Site: | Skagit |
| Issue date: | 07/22/1982 |
| From: | Algermissen S INTERIOR, DEPT. OF, GEOLOGICAL SURVEY |
| To: | Rolonda Jackson Office of Nuclear Reactor Regulation |
| References | |
| NUDOCS 8208020349 | |
| Download: ML20071L151 (1) | |
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United States Department of the Interior GEOLOGICAL SURVEY RESTON, VA. 22092 In Reply Refer To:
Mail Stop 905 July 22,1982 Dr. Robert E. Jackson d 62 Z.
Chief, Geosciences Branch Division of Engineering Nuclear Regulatory Commission Washington, D.C. 20055
Dear Bob:
As a result of our review of the seismic and geologic data for the Skagit/IIanford Nuclear Project and our participation in the meeting held in Bethesda with the applicant, we have reached the conclusion that additional work is necessary to evaluate the May Junction lineation near the site. In particular, we have the following comments:
- 1. As shown on cross-section lines 8 and 3, the applicant is uncertain, as indicated by question marks on contacts, as to the interpretation of the sediments crossing the May Junction lineament. This uncertainty needs to be resolved because of the evidence of possible faulting in the line 8 refraction profile and the proximity of the May Junction lineament to the DB-10 fault and the Central fault. We recommend that the applicant determine, by drilling, if the May Junction lineation is a fault and if it is a fault, is it capable?
2.
A table and/or other comparison showing the relationship between the various lithologic logs and the geophysical logs in the drill holes is higly desirable.
Such a comparison would help to remove uncertainty and ambiguity concerning possible reflection and refraction horizons and their continuity throughout the area.
These recommendations are based on analyses of the data and recommendations by D. D. Dickey, D. M. Perkins, S. T. Ilarding, and myself. I hope you will find these comments useful.
Sincerely, f/YrN Y -
f S. T. Algermissen Co6 l
8208020349 820722 PDR ADOCK 05000522 A
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