ML20065T883
| ML20065T883 | |
| Person / Time | |
|---|---|
| Site: | Skagit |
| Issue date: | 10/15/1982 |
| From: | PUGET SOUND POWER & LIGHT CO. |
| To: | |
| Shared Package | |
| ML20065T873 | List: |
| References | |
| NUDOCS 8211030176 | |
| Download: ML20065T883 (172) | |
Text
S/HNP-PSAR 10/15/82 O
File this instruction sheet in the frcat of Volume 1 as a record of changes.
The f ollowing inf ormation and check list are f urnished as a guide f or the insertion of new sheets f or Amendment 28 into the Preliminary Saf ety Analysis Report f or the Skagit/
Hanford Nuclear Project.
This material is denoted by use of the amendment date in the upper right-hand corner of the page.
New sheets should be inserted as listed below:
Discard Old Sheet Insert New Sheet (Front /Back)
(Front /Back)
CHAPTER 1 1.2-11/1.2-12 1.2-11/1.2-12 CHAPTER 2 2.5-3/2.5-4 2.5-3/2.5-4 2.5-5/2.5-6 2.5-5/2.5-6 2.5-13/2.5-14 2.5-13/2.5-14 2.5-14a/ blank 2.6-13 2.6-13/2.6-14 APPENDIX 2K 2K-1/ blank 2K-1/ blank 2K-iii/2K-iv through 2K-iii/2K-iv through 2K-xi/ blank 2K-xi/ blank 2K-1/2K-2 2K-1/2K-2 2K-3/2K-4 2K-3/2K-4 2K-5/2K-6 2K-5/2K-6 2K-11/2K-12 2K-ll/2K-12 2K-13/2K-14 2K-13/2K-14 2K-27/2K-28 2K-27/2K-28 2K-29/2K-30 2K-29/2K-30 2K-30a/ blank 2K-31/2K-32 through 2K-31/2K-32 through 2K-39/ blank 2K-39/ blank
[
Table 2K-1/ Table 2K-2 Table 2K-1/ blank Table 2K-3/ blank x
8211030176 821015 1
Amendment 28 PDR ADOCK 05000522 B
S/HNP-PSAR 10/15/82 Discard Old Sheet Insert New Sheet (Front /Back)
(Front /Back)
Figure 2K-6A Figure 2K-7A Figure 2K-7B Figure 2K-47A Figure 2K-47B Figure 2K-50A Figure 2K-51A Figure 2K-51B Figure 2K-62 Figure 2K-63 Figure 2K-64 Figure 2K-65 Figure 2K-66 Figure 2K-67 Figure 2K-68 Figure 2K-69 Figure 2K-Al Figure 2K-Al Figure 2K-A2 Figure 2K-A2 Figure 2K-A3 Figure 2K-A3 Figure 2K-A4 Figure 2K-A4 1.PPENDIX 2L Figure 2L-A6 Figure 2L-A6 Figure 2L-A7 Figure 2L-A7 APPENDIX 2R 2R-1/ blank 2R-i/ blank 2R-v/2R-vi 2R-v/2R-vi 2R-ix/2R-x 2R-ix/2R-x 2R-xi/2R-xii 2R-xi/2R-xii 2R-xiii/2R-xiv 2R-xiii/2R-xiv 2R-9/2R-10 2R-9/2R-10 2R-19/2R-20 2R-19/2R-20 2R-25/2R-26 2R-25/2R-26 2R-29/2R-30 2R-29/2R-30 2R-30a/ blank 2R31/2R-32 2R-31/2R-32 2R-33/2P-34 2R-33/2R-34 2R-35/ blank 2R-35/ blank Figure 2R-2 Figure 2R-2 Figure 2R-4 Figure 2R-4 l
2 Amendment 28
S/HNP-PSAR 10/15/82 Discard Old Sheet Insert New Sheet (Front /Back)
(Front /Back)
Figure 2R-7 through Figure 2R-7 through Figure 2R-18 Figure 2R-18 Figure 2R-23 Figure 2R-23 Figure 2R-30 Figure 2R-30 Figure 2R-A-59 (Page 1 of 3)
Figure 2R-A-59 (Page 1 of 3)
Figure 2R-A-ll2 (Page 1 of 8) through Figure 2R-A-ll2 (Page 8 of 8)
Figure 2R-A-113 (Page 1 of 6) through Figure 2R-A-ll3 (Page 6 of 6)
Figure 2R-A-ll4 (Page 1 of 4) through Figure 2R-A-ll4 (Page 4 of 4)
Figure 2R-B-10 Figure 2R-B-10 Figure 2R-B-10A j
Figure 2R-B-24 Figure 2R-B-24 l
Figure 2R-B-24A Figure 2R-B-38 Figure 2R-B-38 Figure 2R-B-38A O
Figure 2R-B-52 Figure 2R-B-52 Figure 2R-B-52A QUESTIONS AND RESPONSES SKAGIT/HANFORD SITE Q231.5-1/ blank Q231.14-1/0231.14-2 Q231.14-3/Q231.14-4 0231.14-5/ Table 231.14-1 (Sheet 1 of 2)
Table 231.14-1 (Sheet 2 1
l of 2)/ blank Figure 231.14-1 Figure 231.14-2 Figure 231.14-3 Figure 231.14-4A (Page 1 of 8) through Figure 231.14-4A (Page 8 of 8)
Figure 231.14-4B (Page 1 of 6) through Figure 231.14-4B (Page 6 O
of 6) 3 Amendment 28
s S/aNP-PSAR 10/15/82 Discard Old Sheet Insert New Sheet (Front /Back)
(Front /Back)
Figure 231.14-4C (Page_1 of 4) through Figure 231.14-4C (Page 4 of 4)
Figure 231.14-5A through Figure 231.14-5D Figure 231.14-6 Figure 231.14-7 Figure 231.14-8 0231.15-1/ blank Figure 231.15-1 through Figure 231.15-7 s
O O
4 Amendment 28
S/HNP-PSAR~
10/15/82 s
af f ected the Site, the two highest intensities are estimated to have been IV-V.(MM) from the December 14, 1872 earthquake and IV (MM) from the Milton-Freewater shock of July 15, 23 1936.
The maximum accelera' tion at-the Site resulting from historical or instrumental earthquakes is estimated to have been 0.015g (see Section 2.5.2.6 WNP-2 FSAR).
A Regulatory Guide l'.60 Spectrum anchored at a peak acceleration of 0.35g is' assigned as the Saf e Shutdown 28 Earthquake (SSE).
The requirements of this SSE exceed those for all potential earthquakes-discussed in Section 2.5.2.4.
1.2.2.1.2.7 Land use.
Natural physic ~al characteristics of
~
L the Plant Site, which indicate that the are'a is ideally situated f or and suited f or operation of the Plant, include:
-favorable geographical, geological, and seismological characteristics; adequate water supply; ideal climatological characteristics; and remoteness from population centers or areas of 'special ecological concern.
The Hanf ord Reserva-tion has served as a nuclear industrial center since 1943 when it was selected by the Federal government as the location-f or construction of one of the world's first o
nuclear production reactors.
Since 1943, nine plutonium s'
production reactors and a number of test reactors have been constructed and operated at the Hanf ord Reservation.
1.2.2.1.2.8 Population.
In 1980 approximately 280,000 people were living within a 50 mile radius of the S/HNP Site.
Since the Site is situated within the Hanford Reservation, there are no significant concentrations of population within a 10-mile radius.
The closest inhabitants occupy farms located east of the Columbia River, and are thinly spread over five compass sectors.
The closest i
resident is about seven miles south of the Plant.
The l
nearest population centers are the Tri-Cities area of Richland (15 miles to the south-coutheast), Pasco (23 miles to the southeast), and Kennewick (23 miles to the SSE-SE);
Benton City (16 miles to the south); Mesa (21 miles to the east-northeast); Prosser (24 miles to the southwest); and othello (26 miles to the north-northeast).
i~
l i
l 1
a 1.2 11 Amendment 28
S/HNP-PSAR 12/21/81 1.2.2.2 General Arrangement of Structures and Equipment The principal structures to be located in the Plant " Nuclear Island" are the following:
a.
Containment -- houses the upper containment pool, the suppression pool, drywell, and major portions of the nuclear steam supply system b.
Auxiliary Building -- houses the Engineered Safety Features, the systems equipment and switchgear, containment switchgear, and portions of the heating and ventilating systems c.
Fuel Buildino -- houses the fuel storage and shipping area, the Standby Gas Treatment System, the control rod drive pumps, the control rod drive service area and portions of the heating and ventilating systems d.
Enclosure Building -- houses that part of the containment that extends above the roofs of the Auxiliary Building and Fuel Building e.
Radwaste Building -- houses the radioactive waste treatment facilities f.
Control Building -- includes the control room, the computer facility and the cable spreading area g.
Diesel Generator Building.
The arrangement of these structures on the Plant Site is shown in Figure 1.2-1.
Figures 1.2-2 through 1.2-8 show the equipment arrangement in the principal buildings.
1.2.2.3 Nuclear System See 251 NSSS GESSAR.
1.2.2.3.1 throug-
.5 See 251 NSSS GESSAR.
- 6 O
1.2-12 Amendment 23
S/HNP-PSAR 12/21/81 O) e A lack of significant or pervasive faults
(
e Low rates of deformation e
Extensive and little-deformed sedimentary units of Pliocene and younger age e
Low rates of seismic activity and e
A lack of large-magnitude earthquakes.
Geologic knowledge of the Columbia Plateau and the Pasco Basin has evolved over nearly a century of investigations and has been reported in over 3000 publications (Ref 1).
Ranging from regional-reconnaissance scale to very detailed site-specific and feature-specific scale, the studies have been conducted for a broad spectrum of purposes:
- academic, resource, facility construction and environmental protection.
The investigations have yielded information that is impressive in amount and variety.
Table 2.5-1 provides a chronology by category of some of the previous investigations that have formed the basis for the site-specific studies conducted #or the S/HNP Site.
It shows, together with the studies cascribed below, that geologic, seismologic, and geotechnical investigations relevant to
).
design and construction of S/HNP have been comprehensive and adequate.
Furthermore, the table shows that the Hanford Reservation is virtually unequaled in the United States with regard to the quantity and quality of data applicable to design of critical facilities.
The approach to studies conducted for the S/HNP Site was 23 based on the concept of verifying previously indicated suitable conditions in the Site Area and selected surrounding areas.
The techniques employed to verify these conditions included:
e Field Mapping e
Trenching Logging Sampling In-Situ Testing e
Rotary and Core Drilling Logging Sampling In-Situ Testing e
Petrologic Analyses Binocular and Petrographic Microscope
_s d
2.5-3 Amendment 23 1
S/HNP-PSAR 10/15/82 o
Downhole Geophysical Logging Neutron-Epithermal Neutron l
Natural Gamma l
Neutron-Gamma Gamma-Gamma o
Ground Gravity and Magnetic Surveys l
o Seismic Surveys Seismic Refraction Downhole in-situ velocity measurements Crosshole in-situ velocity measurements o
Laboratory Testing o
Geochemical Analysis Based on the investigations perf ormed f or the S/HNP Site, the Site has been f ound suitable f or locating the proposed 23 f acilities in that it meets the criteria of Appendix A to 10 CFR 100.
The investigations have also been adequate to satisf y the requirements of Regulatory Guide 1.70 and Standard Review Plans.
Specif ically, the investigations have shown:
o There is no potential for ground rupture and no need to consider surf ace displacement in the Plant design.
o The subsurface soils are competent to provide f oundation support f or Plant structures under both static and dynamic loading conditions, and there are no areas of active or potential subsidence, uplif t or collapse.
o The groundwater table in the Site Area will remain approximately 100 feet below foundation grade, and will not significantly influence, or be influenced by Site-facility water use.
The maximum acceleration at the Site resulting from historical or instrumental earthquakes is estimated to have been 0.015g (see Section 2.5.2.6 WNP-2 FSAR).
A Regulatory Guide 1.60 Spectrum anchored at a peak 28 acceleration of 0.35g is assigned== the saf e Shutdovr Earthquake (SSE).
The requirements of this SSE exceed theca for all potential earthquakes discussed in Section 2.5.2.4.
I O
2.5-4 Amendment 28
S/HNP-PSAR 10/15/82 2.5.1 BASIC GEOLOGIC AND SEISMIC INFORMATION 2.5.1.1 Regional Geology 23 Inf ormation regarding the geology and geologic hazards of the region surrounding the Skagit/Hanford Nuclear Project Site is described in Sections 2.5.1.1 through 2.5.1.2.6 of Amendment 18 (October, 1981) to the WNP-2 FSAR and the Washington Public Power Supply System's responses to WNP-2 Questions 331.16, 361.17, 361.20 through 361.25 and additional information transmitted to NRC by the Supply 28 System on April 26, 1982 (Letter, Bouchey to Schwencer) and is incorporated herein by reference.
This information is supplemented by Appendix 2S to the Skagit/Hanford Nuclear Project PSAR which synthesizes the presently available data bearing on the causative mechanism for deformation of the Yakima Fold Belt.
2.5.1.2 Site Geology The Skagit/Hanford Nuclear Project (S/HNP) Site Area (2-mile radius) was studied in detail to determine the lithologic, stratigraphic, and structural geologic setting.
The regional geologic setting, investigated in cooperation with 4
the Washington Public Power Supply System, is described in Section 2.5.1.1 of the WNP-2 FSAR, Amendment 18.
Investi-gative methods employed in the Site Area included surface geologic mapping, photogeologic analysis, drilling, borehole geophysical logging, sedimentary petrologic studies of drill core and cuttings, and gravity, magnetic, and seismic refraction studies.
These investigations supplemented previous investigations 23 noted in the introduction to Section 2.5 of this PSAR.
Data from the S/HNP investigations show that the basalt topog-l raphy in the Site Area is generally flat, with some minor local warping.
The late Miocene to early Pliocene Ringold I
Formation is deformed over bedrock highs, however, overlying late Pliocene (?) to late Pleistocene flood gravels are generally flat-lying, suggesting tectonic stability since post-Ringold time.
The findings of the Site investigation are consistent with those from other local and regional investigations, generally affirming the regional data with respect to amount, nature, and rate of def ormation.
No evidence for faulting has been observed in the Site Area and I
no capable f aults have been f ound within 5 miles of the l
Plant Site.
Accordingly, there is no need to consider j
surface faulting in the design of the Plant.
The Skagit/Hanford Nuclear Project Site Area is in the east-central part of the Pasco Basin, a depression that is
( )/
partially filled by alluvial and lacustrine sediments of the s,
late Miocene to early Pliocene Ringold Formation.
The m
2.5-5 Amendment 28
S/HNP-PSAR 12/21/81 Ringold Formation is underlain by a thick sequence of basalt flows of the Tertiary Columbia River Basalt Group and associated interbeds.
Sediments overlying the Ringold Formation in the basin include the late Pliocene (?) to late Pleistocene Pre-Missoula and Missoula Flood Gravels (informal names) and Holocene eolian deposits.
This stratigraphic assemblage provides the basis for evaluating the presence or absence and nature of geologic features important to Site safety, i.e.,
potential earthquake sources, zones of potential ground rupture, and foundation support conditions.
The regional context of the Site stratigraphy is described in Section 2.5.1.2.2 of the WNP-2 FSAR, Amendment 18.
The Plant facilities are near the axis of the buried Cold Creek syncline, a structural depression bounded on the north by the Umtanum Ridge-Gable Mountain structural trend and on the south by the Yakima Ridge and Rattlesnake Hills anti-clines.
The regional context of the Site Area structural geology is described in Section 2.5.1. 2.4 of the WNP-2 FSAR, Amendment 18.
Within the Cold Creek syncline, minor deformation of the basalt bedrock surface was initiated at least 14 million years (m.y.) ago (Ref 1) and appears to have continued into Ringold time (10.5 to 3.3 m.y. ago).
Very minor deformation may have occurred in Post-Ringold time; however, the Site Area is characterized by relative structural stability, consistent with regional evidence for 23 low pre-historic and historic seismicity.
The closest fault to the Plant facilities has been recognized in the subsurface on the Southeast anticline (informal name), 5.5 miles northeast of the Plant facilities (Appendices 2K, Section 5.3, and 2R, Section 6.2.1).
The closest faults that are associated with the displacement of Pleistocene deposits are the Central and South faults on Gable Mountain (Appendix 2I, Section 6.1 and 6.2), 8 and 7.5 miles, respectively, northwest of the Plant facilities.
The regional setting and tectonic evolution of faults are described in Section 2.5.1.2.4 of the WNP-2 FSAR, Amendment 18, and in Appendices 2K, 2N, and 20 of this PSAR.
2.5.1.2.1 Site Physiography The Pasco Basin, a physiographic and structural depression within the Columbia Basin subprovince of the Columbia Plateau physiographic province, is a 2,000-square-mile, gently undulatory, semi-arid plain interrupted by low-lying hills and sand dunes dissected by intermittent streams.
The regional setting of the Site Area physiography is described in Section 2.5.1.1.2 of the WNP-2 PSAR, Amendment 18.
The 2.5-6 Amendment 23
S/HNP-PSAR 12/21/81
/
commonly contain interbedded coarse sands.
The gravels are characterized by a dominance of basalt, commonly 95 percent, with a few clasts of granitics and metamorphics.
The sands are dark gray from the high basalt content, but also contain quartz, feldspar, and mica.
Missoula flood gravels are distinguished from Pre-Missoula gravels by the presence of greater than 60 percent basalt in the gravels and sand.
They formed as the result of large-scale catastrophic floods released from glacial Lake Missoula in Montana (Ref 9, 10, 11).
Missoula flood deposits have been assigned an age range of 13,000 years B.P.,
based on the presence of St.
Helens "S" ash near the top of the unit (Ref 12), to 17,500 to 18,000 years B.P.,
based on the age of the last major glacial advance in the northern United States (Ref 13).
They are equivalent to the upper part of the Pasco Gravels of the Hanford Formation as defined by Myers and Price (Ref 1).
Thickness of the Missoula Flood Gravels in the Site Area ranges from approximately 25 to 85 ft.
Missoula flood gravels are the chief materials to be involved in the Site excavation.
Their foundation engineering properties are good and are described in Section 2.5.4 and Appendix 20 2.5.1.2.2.2.4 Surficial Deposits.
Figure 2.5-2 shows the surface geology of the vicinity within a 5-mile radius of
/~'
the Plant facilities.
Surficial deposits include active and
( )h stabilized Holocene dune sands, Holocene alluvium, and Pleistocene glaciofluvial sediments.
In the southwestern part of the map, the Touchet beds of Flint (Ref 14) repre-23 sent fine-grained, slackwater sediments deposited distally from the main Pleistocene flood channels.
In the Site Area (2-mile radius), a thin mantle of active and stabilized Holocene dune sands blankets the Pleistocene Missoula Flood Gravels.
These sands are fine-to medium-grained quartzose or basaltic sands which commonly contain silt (Ref 1).
Sparse vegetation stabilizes most of the dunes.
The eolian deposits range in thickness from 1 to 10 ft in the Site Area.
Most of the surficial deposits will be removed or compacted during Site development and pose no problems for facility design and operation.
2.5.1.2.3 Site Structural Geoloe."
The S/HNP Site Area is in the east-central part of the Pasco Basin, a structural sub-basin of the larger Columbia Basin.
The Pasco Basin is partly surrounded by west-and northwest-trending anticlinal ridges, the Yakima Folds, which are separated by broad synclinal troughs.
The Saddle
~}
Mountains form the northern boundary of the Pasco Basin, and w./
2.5-13 Amendment 23
S/HNP-PSAR 10/15/82 the Rattlesnake Hills and Horse Heaven Hills f orm the southern boundary.
Umtanum Ridge and Yakima Ridge plunge eastward into the basin at the western boundary.
The eastern boundary of the basin is formed by a gentle westward dip on the basalt surface.
The Plant Site is near the axis of the Cold Creek syncline, a buried structural depression between Gable Butte-Gable Mountain-Southeast anticlines on the north and northeast, and the Yakima Ridge anticline on the west and southwest.
23 Investigations for S/HNP drew on previous knowledge of local and regional geologic structure (refer to Section 2.5.1.1 of the WNP-2 FSAR, Amendment 18) to develop specific inf ormation critical to identif ying and characterizing all structures significant f or seismic design.
Detailed photogeologic analyses, field mapping and sub-surf ace stratigraphic studies have not identified any faulting within the Site Area.
The closest fault to the Plant f acilities is 5.5 miles to the northeast on the South-east anticline, the buried easterly segment of the Umtanum Ridge-Gable Mountain structural trend.
This fault was recog-nized on the basis of an anomalous thickness of the Elephant Mountain flow containing several thin zones of shearing in Corehole 125.
Closely spaced coreholes were drilled by Golder Associates for the Washington Public Power Supply System to determine the attitude of this f ault and the conti-nuity of overlying Ringold units (Ref 22).
The fault is a reverse f ault.
It strikes N390W and dips 300SW.
The range of vertical displacement on the fault is 35 to 60 feet.
Based on this small amount of displacement, the Southeast anticline fault appears to be a minor feature and probably does not extend any significant distance away f rom Corehole 125.
28 The sediments overlying the projection of the fault plane have been penetrated by 11 holes spaced 30 to 100 f eet apart along a line 450 feet long.
These overlying sediments include the late Miocene lower Ringold Formation (approxi-mately 10 million years old) and the Pleistocene Hanf ord Formation.
Fine-grained units within the Pre-Missoula Gravels of the Hanford Formation near Corehole 125 have been dated on the basis of paleomagnetic analyses as older than 730,000 years.
Four stratigraphic contacts, ranging in age from approximately 10 million to at least 730,000 years in age, dip gently across the projection of the fault plane and show no abrupt changes in elevation.
Based on these observa-tions, the Southeast anticline fault has not been active for dpproximately 10 million years and is therefore not capable.
The South fault, 7.5 miles north on the south flank of Gable Mountain, is the closest known fault to the Plant f acilities 23 2.5-14 Amendment 28
S/HNP-PSAR 10/15/82 which is associated with displacement of Pleistocene sedi-ments (Appendix 20, Section 6.2.3).
The South fault is inferred to have moved in late Pleistocene time on the basis of deformation observed in clastic dikes present along the 23 fault.
The Central f ault, 8 miles to the northwest on Gable Mountain, has displaced overlying Missoula glaciofluvial deposits (dated at 13,000-17,500 B.P.) in a reverse sense a maximum of 0.2 ft (Appendix 20, Section 6.1.3).
N 2.5-14a Amendment 28
S/HNP-PSAR 12/21/81 C
i 11.
- Baker, V.R.,
Paleohydrology and Sedimentology of Lake Missoula Flooding in Eastern Washington, Geol. Society of America Special Paper 144, (1973), 79 p.
12.
Mullineaux, D.R.,
and others, " Age of the Last Major Scabland Flood of Eastern Washington, as Inferred from Associated Ash Beds of Mount St. Helens Set S/* Geol.
Society of America Abstracts with Programs, 9, 7, (1977), p. 1105.
13.
- Clague, J.J.,
Armstrong, J.E.,
and Mathews, W.H.,
" Advance of the Late Wisconsin Cordilleran Ice Sheet in Southern British Col'umbia Since 22,000 Yrs.
B.P.",
Quaternary Research, v.
13, (1980), p.
322-326.
14.
- Flint, R.F.,
" Origin of the Cheney-Palouse Scabland Tract", Geological Society of America Bulletin, 49, 3,
(1938), p. 461-563.
15.
- Reidel, S.P.,
and others, New Evidence for Greater Than 3.2 km of Columbia River Basalt Beneath the Central Columbia Plateau, American Geophysical Union, Fall Mtg., Ellensburg, WA (1981).
16.
- Raymond, J.R.
and Tillson, D.D.,
" Evaluation of a Thick Basalt Sequence in South-Central Washington - Geophys-gN/
ical and Hydrological Exploration of the Rattlesnake Hills Deep Stratigraphic Test Well", Report BNWL-776, submitted to Atomic Energy Commission, (1968), 126 p.
23 17.
American Society for Testing and Materials, Annual book of ASTM standards, Part 14:
Concrete and mineral aggregates, ASTM, Philadelphia, PA (1976).
18.
American Society for Testing and Materials, 1981, Annual book of ASTM standards, Part 19:
Soil and rock; building stones, ASTM, Philadelphia, PA (1981).
19.
- Silver, M.L.,
Laboratory triaxial testing procedures to determine the cyclic strength of solls, University of Illinois at Chicago Circle for U.S.
Nuclear Regulatory Commission, Chicago, IL (1977).
1 20.
Roctest, The pressuremeter test:
Principles, Testing Equipment and Test Procedure, Roctest, Montreal, Canada (1978).
21.
- Seed, H.B.
and Idriss, I.M.,
Soil Moduli and Damping Factors for Dynamic Response Analyses, University of California, Earthquake Engineering Research Center,
"'S Report No. EERC 70-10, Berkeley, CA (1970).
G 2.6-13 Amendment 23
S/HNP-PSAR 10/15/82 22.
Colder Associates, The Southeast Anticline Fault:
Evaluation of Attitude and Displacement, Report prepared for Washington Public Power Supply System (1982).
O O
i 2.6-14 Amendment 28
S/HNP-PSAR 10/15/82 i
i l
APPENDIX 2K 4
GEOPHYSICAL I!NESTIGATIONS UMTANUM RIDGE TO SOUTHEAST ANTICLINE HANFORD SITE, WASHINGTON prepared for NORTHWEST ENERGY SERVICES COMPANY October, 1981 (Amended October, 1982) i 2K-i Amendment 28 l
l
S/HNP-PSAR 10/15/82
(
TABLE OF CONTENTS Page LIST OF TABLES 2K-v LIST OF FIGURES 2K-vi
1.0 INTRODUCTION
2K-1 1.1 Scope of Investigation 2K-2 1.1.1 Umtanum Ridge-Gable Mountain 2K-2 Area 1.1.2 Central Gable Mountain, DB-10, 2K-2 May Junction Areas 1.1.3 Southeast Anticline 2K-3 2.0
SUMMARY
AND CONCLUSIONS 2K-4 2.1 Summary 2K-4 2.2 Conclusions 2K-4 2.2.1 Gable Butte-Gable Mountain 2K-4 Segment
]
2.2.1.1 DB-10 Area 2K-5 2.2.1.2 May Junction Monocline 2K-5 2.2.2 Southeast Anticline 2K-5 3.0 GEOLOGIC SETTING 2K-7 4.0 GEOPHYSICAL DATA BASE 2K-9 4.1 Data Acquired for Skagit/Hanford 2K-9 Project 4.1.1 Seismic Data 2K-9 l
j 4.1.1.1 Seicmic Refraction 2K-9 4.1.1.1.1 Data Acquisition and 2K-9 Processing 4.1.1.2 Downhole-In-Situ 2K-10 Velocity Measurements 4.1.1.2.1 Data Acquisition and 2K-10 Processing l
l 2K-iii Amendment 28
S/HNP-PSAR 10/15/82 TABLE OF CONTENTS (Cont'd.)
Page 4.1.2 Gravity Data 2K-ll 4.1.2.1 Data Acquisition and 2K-ll Processing 4.1.3 Land Magnetic Data 2K-12 4.1.3.1 Data Acquisition and 2K-12 Processing 4.2 Supplemental Geophysical Data 2K-12 4.2.1 Data Supplied by Washington 2K-12 Public Power Supply System 4.2.2 Data Supplied by Rockwell 2K-13 Hanford Operations 5.0 RESULTS OF INVESTIGATIONS 2K-14 5.1 Regional Geophysical Setting 2K-14 5.2 Gable Butte-Gable Mountain Segment 2K-15 5.2.1 Umtanum Ridge to Gable 2K-16 Mountain 5.2.1.1 Introduction 2K-16 5.2.1.2 Discussion of Results 2K-16 5.2.1.2.1 Gravity Data 2K-16 5.2.1.2.2 Land Magnetic Data 2K-17 5.2.1.2.3 Aeromagnetic Data 2K-17 5.2.1.2.4 Seismic Reflection Data 2K-17 5.2.1.3 Interpretation 2K-18 5.2.2 Central Gable Mountain 2K-19 5.2.2.1 Introduction 2K-19 5.2.2.2 Discussion of Results 2K-19 5.2.2.2.1 Land Magnetic Studies 2K-19 5.2.2.2.2 Seismic Refraction Surveys 2K-20 5.2.3 DB-10 Area 2K-22 l
5.2.3.1 Introduction 2K-22 2K-iv Amendment 28
S/HNP-PSAR 10/15/82 TABLE OF CONTENTS (Cont'd.)
Page 5.2.3.2 Discussion of Results 2K-23 5.2.3.2.1 Seismic Data 2K-23 5.2.3.2.2 Gravity Data 2K-24 5.2.3.3 Interpretations 2K-24 5.2.3.4 Summary 2K-26 5.2.4 May Junction Area 2K-26 5.2.4.1 Introduction 2K-26 5.2.4.2 Discussion of Results 2K-27 5.2.4.2.1 Aeromagnetic Data 2K-27 5.2.4.2.2 Gravity Data 2K-27 5.2.4.2.3 Seismic Data 2K-28 5.2.4.3 Interpretation 2K-28 5.3 Southeast Anticline 2K-29 5.3.1 Introduction 2K-29 g
5.3.2 Discussion of Results 2K-30 5.3.2.1 Magnetic Data 2K-30 5.3.2.2 Gravity Data 2K-30 5.3.2.3 Seismic Refraction Data 2K-30a 5.3.3 Interpretation 2K-35 l
REFERENCES 2K-37 TABLES l
FIGURES ATTACHMENT 2K-A ATTACHMENT 2K-B ATTACHMENT 2K-C O
2K-v Amendment 28
S/HNP-PSAR 10/15/82 LIST OF TABLES Table No.
2K-1 Stratigraphic Sections in Test Pits 1 to 7 DB-10 Area.
2K-2 Table deleted.
2K-3 Table deleted.
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LIST OF FIGURES Figure No.
2K-1 Location Map for Study Area and Adjacent Physiographic Provinces.
2K-2 Location Map of Structural Elements Within Study Area.
2K-3 Location Map of Seismic Refraction Lines.
2K-4 Seismic Refraction Technique.
2K-5 Downhole Technique.
2K-6 Location Map of Gravity and Land Magnetic Lines.
2K-6A Location Map for May Junction Monocline Gravity Studies.
2K-7 Location Map for Washington Public Power Supply System Aeromagnetic Coverage.
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2K-7A Location Map f or Supply System Gravity Cover-age - Vicinity of Borehole 125.
2K-7B Location Map for Gravity Coverage - Savage i
Island and Vicinity.
2K-8 Location Map for Rockwell Seismic Reflection and Gravity Data.
2K-9 Pasco-Walla Walla Area Station Location Map.
2K-10 Pasco-Walla Walla Area Total Bouguer Gravity Anomaly Map.
2K-11 Hanford 10 Area Station Location Map.
2K-12 Hanf ord 10 Area Total Bouguer Gravity Anomaly Map.
?K-13 Total Bouguer Gravity Anomaly Map of the Hanford Site.
2K-vii Amendment 28
S/HNP-PSAR 10/15/82 LIST OF FIGURES (Cont'd.)
Figure No.
2K-14 Aeromagnetic Map f or the Hanf ord Site.
2K-15 Residual Bouguer Gravity Anomaly Map, Gable Butte-Gable Mountain Segment.
2K-16 Plan Map for Detailed Magnetic Coverage Flanking the Northern Portion of Line 25.
2K-17 Total Bouguer Gravity Anomaly Map, Umtanum Ridge-Gable Mountain Area.
2K-18 Residual Bouguer Gravity Anomaly Map, Umtanum Ridge-Gable Mountain Area.
2K-19 Simple Bouguer Gravity Anomaly and Ground Surf ace Profiles, Lines 25 and 23.
2K-20 Land Magnetic Profiles f or the Umtanum Ridge to Gable Mountain Geophysical Program.
2K-21 Land Magnetic Profiles f or Detailed Coverage Flanking Northern Portion of Line 25.
2K-22 Aeromagnetic Map of the Umtanum Ridge to Gable Butte Area.
2K-23 Portion of Processed Reflection Profile f or Rockwell Line 4.
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l 2K-24 Location Map for Central Gable Mountain Land Magnetic Lines.
l 2K-25 Total Field Contour Map, Land Magnetic Survey, Central Gable Mountain.
2K-26 Location Map f or Seismic Ref raction Lines, Central Gable Mountain.
2K-27 Isopach Map of Overburden Material, Velocity 3,000 f t/sec.
l 2K-28 Typical Seismic Cross Section, Central Gable Mountain.
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S/HNP-PSAR 10/15/82 o
LIST OF FIGURES (Cont'd.)
Figure No.
2K-29 Seismic Prof ile Line 9A.
2K-30 Seismic Profile Line 9.
2K-31 Seismic Prof ile Line 9B.
2K-32 Location Map of DB-10 Area.
2K-33 Detail Location Map of DB-10 Area.
2K-34 Seismic and Gravity Profiles Line DB-10-4.
2K-35 Seismic and Gravity Profiles Line DB-10-8.
2K-36 Seismic and Gravity Profiles Line DB-10-3.
2K-37 Seismic Profile Line 7 and Gravity Profile Line D.
2K-38 Seismic and Gravity Profiles Line 8.
2K-39 Bedrock Contour Map Based on Seismic Interpretation, DB-10 Area.
2K-40 Velocity Contour Map f or Basalt, DB-10 Area.
2K-41 Total Bouguer Gravity Anomaly Map, DB-10 Area.
2K-42 Residual Bouguer Gravity Anomaly Map, DB-10 Area.
2K-43 Structural Interpretation of Survey Line 8 Based on Drill Hole Data.
2K-44 Cross Section Showing Projection of Upper Fault in DB-10, Striking N30E and Dipping 320W, Based Upon Case 2 Interpretation of Golder Associates (1981).
j 2K-45 Interpretation of Rockwell Seismic Reflection i
Line 3-1 by Seismograph Services Corporation.
2K-46 Aercmagnetic Map, May Junction Area.
2K-47 Total Bouguer Gravity Anomaly Map, May Junction Area.
2K-ix Amendment 28
S/HNP-PSAR 10/15/82 LIST OF FIGURES (Cont'd.)
Figure No.
2K-47A Detailed Total Bouguer Gravity Anomaly Map, May Junction Area.
2K-47B Geologic Model of Gravity - Line 8C.
2K-48 Bedrock Contour Map Based on Seismic Refraction Data, May Junction Area.
2K-49 Aeromagnetic Map, Southeast Anticline Area.
2K-50 Fence Plots of Land Magnetic Data, Southeast Anticline Area.
2K-50A Land Magnetic Contours - Vicinity of Borehole 125.
2K-51 Total Bouguer Gravity Anomaly Map, Southeast Anticline Area.
2K-51A Residual Bouguer Gravity Anomaly Map - Vicinity of Borehole 125.
2K-51B Residual Bouguer Gravity Anomaly Map - Savage Island Area.
2K-52 Seismic, Gravity and Land Magnetic Prof iles, Line 3.
2K-53 Seismic, Gravity and Land Magnetic Profiles, Line 2.
2K-54 Seismic, Gravity and Land Magnetic Prof iles, Line 1.
2K-55 Seismic, Gravity and Land Magnetic Profiles, Line 4A.
2K-56 Seismic, Gravity and Land Magnetic Prof iles, Line 4B.
2K-57 Seismic, Gravity and Land Magnetic Prof iles, Line 4C.
i 2K-58 Seismic, Gravity and Land Magnetic Prof iles, Line 6.
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S/RNP-PSAR 10/15/82 LIST OF FIGURES (Cont ' d. )
i Figure No.
l 2K-59 Seismic, Gravity and Land Magnetic Profiles, Line 6A.
2K-60 Seismic and Gravity Profiles, Line 6B.
2K-61 Bedrock Contour Map Based on Seismic Refraction, Southeast Anticline.
2K-62 Figure deleted 2K-63 Figure deleted 2K-64 Figure deleted 2K-65 Figure deleted 2K-66 Figure deleted 2K-67 Figure deleted 2K-68 Figure deleted 1
2K-69 Figure deleted 2K-xi Amendment 28
S/HNP-PSAR 10/15/82
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l.0 INTRODUCTION As part of the investigations of the Umtanum Ridge-Gable 23 Mountain structural trend, geophysical field studies were conducted for Northwest Energy Services Company (NESCO) from February 1980 to June 1981.
The geophysical investigations were part of the overall siting study f or the Skagit/Hanf ord Project.
Amendment 28 updates Appendix 2K to reflect additional investigations conducted on the 28 Southeast anticline by the Washington Public Power Supply System and the May Junction monocline by NESCO during 1982.
The geophysical investigation focused primarily on the t
bedrock conf iguration of the Hanf ord Site (Figure 2K-1).
This report describes the geophysical investigations of the Umtanum Ridge-Gable Mountain structural trend, its associated structures, Gable Butte and Gable Mountain, and 2
a buried ridge, informally named the Southeast Anticline, trending southeasterly f rom Gable Mountain.
The present area of study covers nearly 200 square miles of l
the Hanf ord Site, which is located in the central portion of the Yakima Fold Belt of the central Columbia Plateau of south-central Washington (Figure 2K-1).
The bedrock units, l
the Miocene Columbia River Basalt Group, are overlain by as much as 700 feet of Late Tertiary and Quarternary sediments and sedimentary rocks.
The drilling performed by Golder Associates encountered the Elephant Mountain Member of the Saddle Mountains Basalt as the youngest bedrock unit in all boreholes.
Consequently, the top of bedrock can be considered a structural surf ace l
on the top of the Elephant Mountain Member, except south of Vernita Bridge, where the Elephant Mountain Member is not present (Figure 2K-2); the older Pomona Member is the 23 uppermost basalt unit in this area.
These geologic conditions are f avorable f or the geophysical investigation of subsurf ace structure.
The density contrast between the sediments and the basalt is 0.3-0.7 g/cm3 The Bouguer gravity anomaly map f or the Hanf ord Site is an approximate structural contour map with an arbitrary datum and a conversion f actor of 150 f eet of basalt elevation per 1 milligal of gravity relief.
The conversion factor was determined f rom comparison of the profile of top of basalt (based on logging of drillholes and analysis of cuttings and core) with the gravity anomaly along the same profile.
If no erosion of the Elephant Mountain basalt has occurred, then the top of basalt is a structural surface.
- However, some erosion has occurred.
On the basis of the measured thickness of the Elephant Mountain basalt in all holes that extended through the unit, the erosion has removed s/
dif f erentially at most 80 f eet of basalt.
Therefore, the top of basalt is a structural surface within +40 feet 2K-1 Amendment 28
.~.-
S/HNP-PSAR 12/21/81 (except in the area of Vernita Bridge where the unit is not present).
The conversion factor of 150 feet = 1 milligal is the average value determined for several profiles.
It varies by approximately 20% over the study area as a result of the variation of the density of the Ringold Formation, which in i
turn is controlled by the relative thickness of coarse and fine units.
1.1 SCOPE OF INVESTIGATION The geophysical investigations of the Umtanum Ridge-Gable Mountain structural trend were cesigned to delineate bedrock topography and examine specific structures within each area described below and shown on Figure 2K-2.
1.1.1 Umtanum Ridge-Gable Mountain Area The Umtanum Ridge-Gable Mountain geophysical studies were designed to determine the structural continuity or discontinuity between Umtanum Ridge and Gable Mountain.
Aeromagnetic and gravity data acquired for the Washington Public Power Supply System by Aeroservice, Inc. and Weston Geophysical Corporation, respectively, were interpreted by Weston Geophysical Corporation (1978a, 1978b, 1978c, Washington Public Power, 1977) as indicating possible structural continuity from Umtanum Ridge to Gable Mountain.
Myers and Price (1979) concluded that the Gable Butte structure was a second-order fold on a continuous, primary fold linking Gable Mountain with Umtanum Ridge.
Accordingly, gravity and land magnetic data were acquired and interpreted in order to analyze and characterize the structural continuity or discontinuity of the Umtanum Ridge to Gable Mountain trend.
1.1.2 Central Gable Mountain, DB-10, May Junction Areas The Central Gable Mountain-DB-10 area was investigated to determine the structural relationships between this area and the Umtanum ridge structure as well as to augment geologic investigations of faulting.
Corehole DB-10 encountered two zones of reverse faulting with a combined offset estimated to be 160 feet (Myers and Price, 1979).
Weston Geophysical conducted a program of seismic 2K-2 Amendment 23
S/HNP-PSAR 12/21/81
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refraction, gravity and land magnetics to complement the geological studies of the faults.
Geophysical data were acquired on Gable Mountain to assist in the investigation of faults in the central Gable Mountain area.
The geophysical program of seismic refraction, gravity and land magnetics was designed to assist in tracing the faults, as well as to investigate features believed related to the observed offset.
Seismic refraction data were also utilized in feasibility studies for various trench localities on Gable Mountain.
The May Junction linear, initially defined on the basis of aeromagnetic data (Myers and Price, 1979), was investigated by seismic refraction and gravity data acquired by Weston Ger physical and drilling data collected by Golder Associates to characterize the structural relationships between this feature and the Umtanum Ridge-Gable Mountain structural trend.
1.1.3 Southeast Anticline p
The third major area of investigation was the subsurface
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ridge informally named the Southeast Anticline.
The l
aeromagnetic data acquired by Washington Public Power N-Supply System shows a magnetic high trending southeasterly l
from the eastern end of Gable Mountain.
Extensive seismic l
refraction, gravity and land magnetic data were acquired and interpreted in order to characterize the Southeast i
Anticline and the structural relationships between the Southeast Anticline and the first, second, and third-order folds of the Umtanum Ridge-Gable Mountain structural trend.
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2K-3 Amendment 23
S/HNP-PSAR 10/15/82 2.0
SUMMARY
AND CONCLUSIONS 2.1
SUMMARY
The results of the geophysical investigation implemented by 23 Weston Geophysical f or the Skagit/Hanf ord Project characterize the subsurface basalt topography of the Hanford Site.
The basalt surf ace, based on geologic inf ormation, can be considered a structural surf ace, except in the area south of Vernita Bridge.
New geophysical data obtained for the Skagit/Hanford Project consist of approximately 10,700 closely spaced, l 28 surveyed, and high precision gravity stations; 500 line miles of land magnetic profiles; and 72 line miles of seismic refraction profiles.
Previously acquired data utilized in this study include aeromagnetic data, gravity data, and seismic ref raction data collected f or Washington Public Power Supply System, as well as aeromagnetic data, gravity data, and seismic reflection data acquired by Rockwell Hanf ord Operations.
Two principal structural features have been delineated by the geophysical investigations, the Gable Butte-Gable Mountain segment of the Umtanum Ridge-Gable Mountain structural trend and the Southeast Anticline.
The Gable Butte-Gable Mountain segment of the Umtanum Ridge-Gable Mountain structural trend, is a broad, low amplitude anticline within the Hanford Site and is bounded on the east by the May Junction monocline.
The various faults reported on Gable Mountain and in DB-10 are f eatures within the Gable Butte-Gable Mountain segment.
23 A subsurface, bedrock ridge, the Southeast Anticline, has been def ined as an 8-mile long, low amplitude anticlinal fold.
The Southeast Anticline is separate from and extends 1 mile to the northwest of the eastern end of the Gable Mountain portion of the Gable Butte-Gable Mountain segment.
2.2 CONCLUSION
S 2.2.1 GABLE BUTTE-GABLE MOUNTAIN SEGMENT The gravity anomaly associated with the Gable Butte-Gable Mountain segment of the Umtanum Ridge-Gable Mountain structural trend is a 5 milligal gravity high extending from the eastern end of Umtanum Ridge to the May Junction 2K-4 Amendment 28
S/HNP-PSAR 10/15/82 monocline.
The Gable Butte-Gable Mountain segment, defined primarily by gravity data, is a segment of the Umtanum Ridge-Gable Mountain structural trend, although indicative of a change in structural style f rom the single anticlinal ridge of Umtanum Ridge to the broad, first-order f old with superimposed, second-order anticlines of the Gable Butte-Gable Mountain segment.
This change in structural style occurs at the eastern end of Umtanum Ridge south of Vernita Bridge.
The broad, first-order antif orm is bounded on the east by the monoclinal flexure resulting in the May Junction linear.
2.2.1.1 DB-10 Area The gravity and seismic refraction data are consistent with 23 the geologic interpretation (Golder Associates, 1981, Figure 20-69) that the upper DB-10 f ault strikes north-south and dips 300 to the west.
Based on seismic refraction velocity data, the length of the upper DB-10 f ault appears to be 2,400 f eet, limiting the fault to the small, northwest-trending, anticlinal fold south of Gable Mountain.
v 2.2.1.2 May Junction Monocline The May Junction monocline trends north-south for a distance of 2 1/2 miles from the eastern end of Gable Mountain, has a maximum relief of 300 feet, and a maximum l
dip on the eastward sloping rock surf ace of 100 An l 28 elongate gravity high indicative of an anticlinal fold I
extends across the southern portion of the May Junction l
monocline.
The seismic refraction data for the May Junction and DB-10 areas indicate an anisotropic condition in the basalt.
The bedrock velocities are higher in a north-south direction than in an east-west direction.
The anisotropy suggests that fracturing is oriented north-south, parallel to the May Junction monocline.
23 2.2.2 SOUTHEAST ANTICLINE The Southeast Anticine is a separate structure from the first-order f old of the Gable Butte-Gable Mountain segment.
The Southeast Anticline is also separate from the second-2K-5 Amendment 28
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S/HNP-PSAR 10/15/82 order fold, Gable Mountain, and extends 1 mile to the northwest beyond the eastern end of Gable Mountain.
23 The trend of the Southeast Anticline changes from northwest to east-northeast at its southeastern end and does not 28 extend east of the Columbia River.
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2K-6 Amendment 28
S/HNP-PSAR 10/15/82 1
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foot intervals in the monitoring hole (Figure 2K-5).
Typically, multiple shots were used and the cable adjusted (overlapped) to obtain data at 5-foot intervals to various depths (usually the top of basalt).
The downhole data for each borehole were computer processed and an average velocity value determined for the overburden column.
Time-distance plots of the data were also constructed in order to define the velocity interfaces.
The downhole velocity data in profile f orm is presented in Attachment A.
The average velocities determined from downhole along a 23 given seismic line were then used to convert the time profile of the 16,000 ft/sec. refractor to a depth profile l (Section 4.1.1.1.1).
4.1.2 GRAVITY DATA 4.1.2.1 Data Acquisition and Processing Approximately 10,700 gravity stations were established 28 along traverse lines within the Hanf ord Site at the locations shown on Figure 2K-6.
All data points were s_
acquired utilizing Lacoste-Romberg Model G gravimeters, capable of 0.01 milligal reading precision.
All gravity measurements were made in ref erence to local base stations established from the Washington gravity base station network (Pasco B Station, Nilson, 1976).
23 The gravity data were generally acquired at a 400-foot station interval along the traverse lines (Figure 2K-6).
In areas where greater detail was required to more closely determine the location of a causative feature for an anomaly, stations were established at a 100-foot interval.
Additional gravity stations were also established in Sections 32 and 33 of T13N, R27E, approximately one mile south of Gable Mountain (Figure 2K-6A) to investigate the 28 May Junction monocline.
The stations were located along eleven traverse lines (8A-8N, 8J and portions of Lines 8 and D) at 100-foot intervals.
Gravimeter dial readings were converted to milligal values utilizing conversion f actors appropriate to the instrument (supplied by the manuf acturer).
The data were corrected f or instrumental and tidal drif t by means of base station 23 reoccupations at intervals of three hours or less.
The drif t was considered linear over this time period.
v 2K-ll Amendment 28
S/HNP-PSAR 10/15/82 Subsequent to correcting the gravity observations f or instrumental and tidal drift, the. data were corrected for latitude as well as station elevation and assumed rock density (combined f ree air and Bouguet corrections).
The gravity data were all reduced to a datum elevation of sea level utilizing a density of 2.67 g/cm3 The resulting simple Bouguer gravity values, in the vicinity of Gable Mountain and Umtanum Ridge, were individually corrected for the surrounding variations in terrain according to Hammer (1939) and Douglas and Prahl (1971).
The effects of variations in the terrain within a 13.6 mile radius were applied to each station in these two localities..
The resultant gravity data points were then processed and contoured to produce total, regional and residual Bouguer anomaly maps.
4.1.3 LAND MAGNETIC DATA 4.1.3.1 Data Acquisition and Processing Land magnetic data were acquired along'five hundred miles of traverse lines during this investigation.
All data were 23 acquired utilizing protta precession magnetometers and were recorded to the 1.0 gamma reading accuracy of the instruments.
Local base stations were used for standard closure procedures to monitor the diurnal variations of the earth's magnetic field.
The magnetic data were acquired at 100-foot intervals for one-quarter to one-third of the data collected along the lines illustrated in Figure 2K-6.
The remaining data were acquired at 50-foot intervals.
Subsequent to correcting the diurnal drif t, the data for each line were plotted in profile f orm and evaluated collectively with the seismic refraction and the gravity data for the same line.
4.2 SUPPLEMENTAL GEOPHYSICAL DATA 4.2.1 DATA SUPPLIED BY WASHINGTON PUBLIC POWER SUPPLY SYSTEM The Washington Public Power Supply System provided gravity, land magnetic, aeromagnetic and seismic refraction data to 2K-12 Amendment 28
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augment the data acquired for Northwest Energy Services Company.
The Supply System data were used to assist in planning of the NESCO programs as well as combined with NESCO data to increase the data base available for interpretation.
The interpretations by Weston Geophysical (Weston Geophysical, 1978c; tiashington Public Power Supply System, 1977, Appendix 2R-1) of both the gravity and land magnetic data provided guidelines f or new programs.
The aeromagnetic data acquired by the Supply System (Figure 23 2K-7) were also utilized in the geophysical investigation of the Hanf ord Site.
Details of the aeromagnetic survey, as well as previous interpretations, can be found in Washington Public Power Supply System (1977, Appendix 2R-I) and Weston Geophysical (1978a).
Seismic refraction data collected by Weston Geophysical in the vicinity of the Supply System sites (Washington Public Power Supply System, 1974) provided guidelines for data acquisition and processing techniques, as well as additional input concerning the seismic characteristics of the overburden of the Hanf ord Site.
Additional gravity and magnetic data in the vicinity of O
Line 4A (Figure 2K-7A) and gravity data on Savage Island and +ast of the Columbia River (Figure 2K-7B) acquired for 28 the Supply System (Weston Geophysical, 1982) supplemented the NESCO data base f or f urther evaluation of the Southeast anticline.
4.2.2 DATA SUPPLIED BY ROCKWELL HANFORD OPERATIONS Rockwell Hanf ord Operations provided land magnetic and gravity data, aeromagnetic contour maps of a multi-level survey, and prints of processed reflection data.
These data, acquired during Rockwell's siting program f or a 23 nuclear waste repository, were utilized in program planning and were evaluated relative to the data obtained for the Skagit/Hanford Project.
The locations of the Rockwell reflection profiles and those Rockwell gravity data utilized in this study are shown on Figure 2K-8.
2K-13 Amendment 28 I
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S/HNP-PSAR 12/21/81 5.0 RESULTS OF INVESTIGATIONS 5.1 REGIONAL GEOPHYSICAL SETTING The Central Columbia Plateau of south-central Washington has been studied extensively during the past five to ten years.
A large volume of geophysical data has been acquired by the United States Geological Survey (Swanson, et al., 1979 and Zietz, et al., 1971), by Rockwell Hanford Operations in their siting program for a waste repository (Myers and Price, 1979, and others), by various consultants to Washington Public Power Supply System (Weston Geophysical, 1978a; 1978b; 1978c; Washington Public Power Supply System, 1981, 1977) and through the present investigations for NESCO.
The gravity map for the Central Columbia Plateau (Figures 2K-4 and 2K-10) defines a north-northeast trending, semi-rectangular gravity high with two " lobes" extending from its southeastern and southwestern extremities.
The rectangular high has been interpreted as defining a thick section of relatively high density material.
The lower, high density body underlies 1-2 kilometers of Columbia River Basalts and has been modeled at 3-5 kilometers thick.
The sides of the lower body dip inward at slopes ranging from 50-450 (Washington Public Power Supply System, 1981, Appendix 2. 5L).
The present study area is located over the central portion of the rectangular high and is underlain by 5-7 kilometers of basalt and probable basaltic material.
The generalized configuration of the subsurface basalt topography of the Hanford Site is depicted on the Hanford 10 gravity map (Figure 2K-12).
The Gable Butte-Gable Mountain segment of the Umtanum Ridge-Gable Mountain structural trend is indicated by an elongate, 5 milligal gravity high trending N750W, north of the Skagit/Hanf7rd site.
Interpretations of aeromagnetic data for the Columbia Plateau also indicate an excess thickness of dense, i
magnetic rocks beneath the plateau.
Zietz et al. (1971) interpreted a high-level (15,000 feet above sea level) survey and postulated the thickest section of basalt as underlying the region along the eastern margin of the Hanford Site.
The interpretations of low-level surveys (Washington Public Power Supply System, 1977, Appendix 2R-I; Swanson et al.,
1979; Weston Geophysical, 1978a) have characterized the prominent anticlinal ridges of the Yakima Fold Belt and defined the subsurface extensions of these ridges within the Hanford Site.
Swanson et al. (1979) 2K-14 Amendment 23
S/HNP-PSAR 10/15/82 5.2.4.2 Discussion of Results 5.2.4.2.1 Aeromagnetic Data The existing aeromagnetic data, those of Washington Public Power Supply System and Rockwell Hanford, exhibit similar features to those identified from the gravity data collected for Northwest Energy Services Company.
The prominent north-south magnetic feature is the May Junction linear of Rockwell (Myers and Price, 1979).
This north-south gradient (Figure 2K-46) intersects the northwest-trending magnetic anomalies to the west and bounds a large, 23 regional magnetic low to the east.
The May Junction linear indicates the location of a known bedrock gradient with up to 350 f eet of relief based on drill hole and other geophysical data.
5.2.4.2.2 Gravity Data The Bouguer gravity map of the May Junction area shown in Figure 2K-47 was processed with a density of 2.67 g/cm3, Because of the contrast in density between basalt and sediments (0.3 to 0.7 g/cm3), the map is controlled mainly by the topography of the basalt.
The gravity data acquired along eleven east-west traverse lines intersecting the trend of the May Junction monocline (Figure 2K-6A) provides greater detail on the configuration of the top-of-basalt.
The gravity anomaly contours, as illustrated on the detailed Bouguer gravity map of the area (Figure 2K-47A),
are consistent with a north-south trending bedrock surface sloping gently toward the east.
The north-south trending May Junction gradient is produced by the change in depth to the top of basalt of approximately 350 feet.
A model of the subsurf ace geology that satisfies both the results of drilling and the gravity along Lina 80 is shown on Figure 2K-47B.
The densities used for the units are 2.60 g/cm3 for the basalt, 2.45 g/cm3 for the Ringold Basal Unit I gravel, and 2.0 g/cm3 for the Rattlesnake Ridge interbed and the remainder of the sedimentary section.
The elevation of the basalt surf ace varies smoothly.
The maxi-mum slope of the basalt surface along the May Junction structure at Line 8C is 100 as determined by drilling data and gravity modeling.
O 2K-27 Amendment 28
S/HNP-PSAR 10/15/82 5.2.4.2.3 Seismic Data The north-south trending May Junction linear observed in the gravity and magnetic data is clearly present on seismic l
lines 7 and 8.
Both lines show a steep rise of the bedrock surf ace f rom east to west with a maximum relief of 350 feet.
As shown in the bedrock contour map (Figure 2K-48),
the northwest-trending DB-10 ridge is not distinct at its projected intersection with Lines 7 and 8.
The dominant north-south May Junction monocline interferes with the northwest trend of the DB-10 anticline.
The bedrock I
surface on Line 8 is irregular at the intersection of the two trends.
The bedrock velocities in the DB-10 and May Junction areas 23 are indicative of anisotropic conditions.
They are consistently higher along north-south trending seismic profiles than on east-west profiles.
5.2.4.3 Interpretation The May Junction monocline produces prominent anomalies in both the magnetic and gravity fields.
The data indicate the presence of an eastward-dipping monocline about 2,000 f eet wide that strikes north-south f or a distance of approxim6tely 2 miles.
This interpretation is consistent with tha drill hole profile shown in Figure 2K-43 (provided that the interference of structures in the DH-97, DH-93 area is recognized) and the drilling data noted on Figure 2K-47B.
There is no evidence in the seismic refraction or the gravity data to support the f ault near Station 435 as proposed on the basis of the seismic reflection data by Seismograph Services Corporation (in Myers and Price, 1979 and shown on Figure 2K-45).
The change of Bouguer gravity 28 anomaly across the May Junction monocline is due to the change of elevation of the top of basalt, change of density in the Ringold section and variation of the regional Bouguer gravity anomaly, the change in elevation of the top of basalt accounts for at least 90% of the change.
No evi-dence f or of f set is present.
In the DB-10 and May Junction areas, the bedrock velocities are higher in a north-south direction than in an east-west direction.
The higher velocities (14,000 to 15,000 f t/sec.) approximate the bedrock velocities measured in 23 other areas (16,000 ft/sec.).
The minimum values, however, are significantly lower (approximately 12,000 f t/sec.) and could be caused by (1) primary features in the basalt, (2) anisotropic (horizontal) stress, and (3) open fractures 2K-28 Amendment 28
S/HNP-PSAR 10/15/82 developed in the basalt and oriented north-south.
Cause No. 1 is rejected because the same basalt unit is present I
elsewhere on the reservattion and does not exhibit anisotropy outside the DB-10 area.
Cause No. 2 is rejected l
as the chief cause of anisotropy because of the magnitude of the stress difference that is required.
Nur and Simmons (1969) showed that a stress difference of 400 bars produced 15% anisotropy in dry Barre granite.
A much larger stress f
dif f erence would be required f or saturated or partially saturated rock.
We attribute the cause of the anisotropy to cause number 3, fractures in basalt.
The broad, first-order antif orm of the Gable Butte-Gable Mountain segment is bounded by the May Junction monocline.
An elongate gravity high indicative of a small anticlinal f old extends across the southern portion of the May Junction monocline.
The geometry does not imply an age relationship between the two f eatures.
This small northwest-trending anticline is separate and distinct f rom the Southeast Anticline.
23 5.3 SOUTHEAST ANTICLINE 5.
3.1 INTRODUCTION
The aeromagnetic data acquired by Washington Public Power Supply System (Figure 2K-49) show a magnetic high trending southeasterly from the eastern end of Gable Mountain.
Two aeromagnetic survey blocks are joined along the axis of this magnetic high.
Those individual flight lines which overlap f rom one survey block to another have been evaluated and confirm that the magnetic high is real and not an artif act of merging the two aeromagnetic survey blocks.
Rockwell's 1980 aeromagnetic survey of the Hanf ord Reservation area further confirms the existence of this aeromagnetic high.
Extensive seismic refraction, gravity and land magnetic data were acquired to characterize this anticlinal ridge and to define the structural relationships between the Southeast Anticline and the first, second,
and third-order folds of the Umtanum Ridge-Gable Mountain structural trend.
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1 l
S/HNP-PSAR 10/15/82 1
5.3.2 DISCUSSION OF RESULTS 5.3.2.1 Magnetic Data An aeromagnetic high, generally symmetrical in shape, trends in a southeasterly direction f rom the eastern end of 23 Gable Mountain to the vicinity of Line 4C.
At this location the anomaly decreases in amplitude and appears to be offset to the southwest.
This lower amplitude magnetic high continues trending southeasterly and then easterly in the vicinity of Lines 4E and 4F.
The individual land magnetic profiles (Figure 2K-50) indicate a feature which may be more complex than the aeromagnetic data would indicate.
A sharp anomaly (A) trends in a S60 E direction from Line 3 to Line 1-A but is 24 not traceable south of Line 1-A.
The single peaked, magnetic anomaly on Line 1 broadens and divides into two more subdued peaks (B and b) in the vicinity of Line 4B.
The northeasterly of the two southeast trends decreases in amplitude to a magnetic low (C) on Line 4D.
The 23 southwesterly of the two southeast-trending highs appears to continue southeast of Line 4D but is then offset in an en echelon manner, similar to the aeromagnetic data, to a southeasterly-trending lower amplitude magnetic high on Lines 4E and 4F (D).
Land magnetic data acquired for the Supply System in the immediate vicinity of Borehole 125 on Line 4A (Weston 28 Geophysical, 1982) have been contoured and are shown on Figure 2K-50A.
A small residual magnetic high of approxi-mately 25 gammas, located just southwest of Borehole 125, is consistent with a small undulation in the top of basalt.
5.3.2.2 Gravity Data The gravity data processed at a density of 2.67 g/cm3 (Figure 2K-51) define a gravity high trending southeasterly from the Gable Mountain area.
Detailed gravity coverage (Figure 2K-6) shows that the northwest portion of this 23 gravity feature is quite linear and appears to extend one mile northwest of the eastern end of Gable Mountain.
The southeast-trending gravity high is generally symmetrical in shape and decreases in amplitude toward the southeast.
Assuming that 1 milligal gravity is equal to about 150 feet of basalt relief, the basalt surface slopes at angles ranging from 5 to 13 degrees.
The gravity data 2K-30 Amendment 28
S/HNP-PSAR 10/15/82
(
clearly indicate that the southeast-trending f eature 23 changes trend to east-northeast in the vicinity of Lines 4C and 4D.
Gravity data acquired for the Supply System (Weston Geophysical, 1982) provides additional inf ormation on two aspects of the Souteast anticline.
First, a detailed survey in the immediate vicinity of Borehole 125 on Line 4A (Figure 2K-7A) has delineated a small localized rise in the surf ace of basalt consistent with the results of the detailed drilling program in that area (Golder Associates, 1982).
This localized rise is indicated as anomaly A on 28 the residual Bouguer anomaly map for the area (Figure 2K-51A).
Second, additional data acquired on Savage Island and east of the river (See Fig 2K-7B) constrain the extent of the Southeast anticline.
The residual Bouguer gravity anomaly attributed to the Southeast anticline terminates in the vicinity of Savage Island (Figure 2K-51B).
Therefore, the Southeast anticline does not extend east of the Columbia River.
5.3.2.3 Seismic Refraction Data
("'g Seismic refraction data across the Southeast Anticline have
( )
been acquired and profiled along Lines 3 (Figure 2K-52), 1 (Figure 2K-54), 4A (Figure 2K-55), and 4B (Figure 2K-56) and on the southwesterly side of the f eature on Line 2 (Figure 2K-53).
Seismic data were also obtained for l
portions of Lines 4C (Figure 2K-57), 6 (Figure 2K-58), and 6A (Figure 2K-59) to provide more inf ormation on the configuration of the bedrock surf ace in the area where the gravity and magnetic data indicated a change in the orientation of the f eature.
Seismic data were acquired on Line 6B (2K-60) to explore the e.artheast flank of the Southeast Anticline.
23 Overburden seismic velocities in the area of the Southeast Anticline are, in general, typical of those encountered l
elsewhere in the Hanf ord Reservation.
The low velocity (2,500-3,000 ft/sec.) overburden has a uniform thickness of approximately 100 feet except at the northeast limit of t h t:
area near the Columbia River where it thins to 50 feet.
Higher velocity overburden materials (9,500-10,000 f t/sec.)
underlie the lower velocity material southwest of the bedrock high.
The seismic velocity of this material changes to 6,500-7,500 ft/sec. northeast of the bedrock ridge.
l The seismic velocity of competent basalt in the vicinity of
/N the bedrock ridge is 15,000-16,000 f t/sec.
Highly 2K-30a Amendment 28
S/HNP-PSAR 10/15/82 f ractured basalt above a depth of 250 f eet in Boring 125 (Line 4A, Figure 2K-55) correlates with a seismic velocity of 7,500 f t/sec.
The higher velocity overburden materials also have a velocity of 7,200-7,500 ft/sec. over the anticline, precluding a determination of the lateral extent of the f ractured basalt along Line 4A.
To the southeast of Boring 125, the velocity of 9,000-9,500 f t/sec. is indicative of cemented overburden materials as identified in Boring 122A.
In Boring 109, northeast of Boring 125, the 7,200-7,500 ft/sec. material has been identified as overburden.
The fractured basalt encountered on Line 4A in the vicinity I
of Boring 125 probably extends along strike of the ridge.
Differences between the seismic top of rock elevations and borehole bedrock elevations also occur on Lines 1, 3 and 4B along the southwest side of the bedrock ridge.
Basalt elevations in Boreholes 105 (Line 1) and 37 (Line 3) are 50 to 100 feet above the seismic top of high velocity bedrock (16,000 f t/sec.).
The materials above the 16,000 ft/sec.
horizon have a seismic velocity of 6,800-7,500 f t/sec. and are described in the boring logs as " weathered basalt."
To the southeast, on Line 4B, " extremely weathered, fractured 23 basalt" was logged in Boring 101 at elevation 234, 75 feet above the top of seismic high velocity basalt.
The profiles f or Lines 1 (Figure 2K-54), 3 (Figure 2K-52),
and 4A (Figure 2K-57) show slopes on the high velocity 0 to 90 on each side of the bedrock bedrock ranging from 5 high.
The prof ile of the southwestern side of the bedrock ridge on Line 2 (Figure 2K-53) also exhibits a bedrock slope of approximately 100 All of the bedrock slopes described above are smooth.
The top of high velocity basalt contour map (Figure 2K-61) compiled f rom the seismic ref raction data f or the Southeast Anticline def ines a southeast-trending, broadly asymmetrical anticline f eature.
The anticline extends f rom the vicinity of Line A to Line 4B where it changes trend from a southeasterly to an east-northeasterly direction.
The southwest flank of the anticline has a slightly steeper gradient than the northeast flank.
The f eature becomes symmetrical as it changes trend to the east-northeast; the maximum slopes on either flank of the ridge decrease to 80 j
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S/HNP-PSAR 10/15/82 5.3.3 INTERPRETATION Gravity, seismic refraction, land magnetic and aeromagnetic data have defined a southeast trending anticlinal shaped feature extending from the vicinity of Line A to Line 4C where it changes trend to east-northeasterly but doas not extend east of the Columbia River.
Geochemical analysis of 28 drill cuttings in this location identified the basalt surface as the same basalt unit.
The anticlinal interpretation is based on the symmetry and broad shape of the aeromagnetic and land magnetic profiles across the feature, as well as the slope of the basalt surface as 23 defined by the gravity and seismic data.
Slopes on the basalt surf ace as determined f rom the seismic and gravity data range from 5 to 16 degrees.
2K-35 Amendment 28
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e m.,,. me.ne _ m,
1.,,
,1 _
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l l
2K-36 Amendment 28
S/HNP-PSAR 10/15/82 O
Ref erences f or PSAR Appendix 2K 1.
Douglas, J. K. and Prahl, S.
R.,
1972, Extended Terrain Correction Tables f or Gravity Reductions:
Geophysics, V.
37, No. 2, p. 337-379.
2.
Gardner, L. W.,
1967, Refraction Seismograph Profile Interpretation:
Seismic Refraction Prospecting, A. W.
Musgrave, editor:
Society of Exploration Gecphysicists.
3.
Golder Associates, Inc., 1981, Appendix 20:
Gable Mountain Structural Investigations and Analyses, prepared for Northwest Energy Services Company, Kirkland, Washington.
4.
Hammer, Sigmund, 1939, Terrain Corrections f or Gravimeter Stations:
Geophysics, V.
4, p. 184-294.
5.
Mullineaux, D.
R., Wilcox, R.
E., Ebaugh, W.
F.,
- Fryxell, R.,
and Rubin, M.,
1977, Age of the Last Major Scabland Flood of Eastern Washington, as Inferred from Associated Ash Beds of Mount St. Helens Set S:
Geclogical Society of America Abstracts with Programs, V.
9, No. 7, p. 1105.
6.
Myers, C. W.
and Price, S.
M.,
1979, Geologic Studies of the Columbia Plateau:
RHO-BWI-ST-4, Rockwell Hanf ord Operations, Richland, Washington.
i 7.
Nilson, T.
H.,
1976, Washington Gravity Base Station Network:
State cf Washington Department of Natural Resources Division of Geology and Earth Resources, Information Circular 53.
8.
Nur, A.
and Simmons, G.,
1969, The Effect of Saturation on Velocity in Low Porosity Rocks:
Earth Planetary Science Letters, V.
7, p. 183-193.
9.
- Swanson, D.
A., Wright, T. L.
and Zietz, I.,
- 1979, Aeromagnetic Map and Geologic Interpretation of the West-Central Columbia Plateau, Washington and Adjacent Oregon:
U.S. Geological Survey Investigation GP-917, Scale 1:250,000.
10.
Tallman, A.
M.,
Lillie, J.
T.,
and Caggiano, J.
A.,
1978, Basalt Waste Isolation Program Annual Report:
RHO-BWI-78-100, Rockwell Hanf ord Operations, Richland, Washington.
2K-37 Amendment 28
S/HNP-PSAR 10/15/82 11.
(Reference deleted.)
12.
Talwani, M. and Landisman, M.,
1959, Rapid Gravity Computations f or Two-Dimensional Bodies with Application to the Mendocino Submarine Fracture Zone:
Journal of Geophysical Research, v. 64, no. 1,
- p. 49-59.
13.
Washington Public Power Supply System, 1974, WNP-1/4 Preliminary Safety Analysis Report, Chapter 2.5, Washington Public Power Supply System, Richland, Washington.
14.
Washington Public Power Supply System, 1977, Preliminary Saf ety Analysis Report, Amendment 23, V.
2:
Washington Public Power Supply System, Richland, Washington.
15.
1981, WNP-2 Final Saf ety Analysis Report, Amendment 18, Appendices 2.5L and 2.5M:
Washington Public Power Supply System, Richland, Washington.
16.
Webster, G. D.
and Crosby, J. W.
III, 1981, Stratigraphic Investigation of the Skagit/Hanford Nuclear Project:
prepared for Golder Associates, Inc., Kirkland, Washington.
17.
Weston Geophysical Research, Inc., 1978a, Qualitative Aeromagnetic Evaluation of Structures in the Columbia Plateau and Adjacent Cascade Mountain Area:
prepared for Washington Public Power Supply System, Richland, Washington.
1 18.
1978b, Magnetic Properties of Basalts f or the Columbia Plateau, Parts I and II:
prepared f or Washington Public Power Supply System, Richland, Washington.
19.
1978c, Ground Geophysical Studies, Columbia Plateau and Adjacent Cascade Mountains:
prepared for Washington Public Power Supply System, Richland, Washington.
l l
l 2K-38 Amendment 28
S/HNP-PSAR 10/15/82 20.
- Zietz, I.,
Hearn, B.
C., Higgins, M. W.,
- Robinson, G.
D.,
and Swanson, D.
A.,
1971, Interpretation of an Aeromagnetic Strip Across the Northwestern United States:
Geological Society of America Bulletin, V.
82, No. 12, p. 3347-3372.
21.
Golder Associates, 1982, The Southeast Anticline Fault:
Svaluation of Attitude and Displacement:
prepared for Washington Public Power Supply System, Richland, Washington.
22.
Weston Geophysical, 1982, Geophysical Studies of the Southeast Anticline and Vicinity, Hanford Site, Washington:
prepared for Washington Public Power Supply System, Richland, Washington.
2K-39 Amendment 28
S/HNP-PSAR 12/21/81 TABLE ?M-1
- '~\\
STRATICRAPHIC SECTIONS IN TEST PITS 1 TO 7*
SOUTHWEST TEST PITS NORTHEAST YLST PITS p-wave = 5.000 to 9.000 ft/ sect p-wave a 3,000 to 4,000 ft/sec1 i
w Depth in Depth in Ecet Peet PIT 2 PIT 6 0 to 3 Tan, silty sand.
O to 3.5 Tan, salty sand.
3 to 5 Black sand and pebbles.
3.5 to 7 Cross bedded black sand with some pebbles.
S to 6 Pebble to boulder clasts and tan, 7 to 9 Black sand and pebble tri 4-frut booldes clasth.
silty, clayey sand weakly cemented by caliche in west end of pit and 12-foot square, one-f oot high banalt outcrop in east end of pit.
PIT 5 PIT 4 0 to 3 Tan to brown silty sand.
O to 2.5 Tan, silty, fine sand.
3 to 5.5 Black sand with some gravel.
2.5 to 4.5 Black (basaltici fine to coasse sand.
l 5.5 to 8 Pebble to 3-foot boulder 3.5 to 6.5 Black, fine to coarse, tend wa t h clasts with tan, silty, clayey increasing pes centage of pett l e-to boulder clast s do=ti.o r d.
sand.
PIT 1 i
0 to 3.5 Tan, silty sand.
7 3.5 to 6 Black, medium sand and some gravel.
6 to 8 Black, meds um sand wi t h pehtile to 2-foot bow l.ie r clasts, tightly
\\
packed and remented by celache to a weak conglumesate.
O to 9 Same as 6-to 8-f oot depth interval but matraa changes to a tan, *'Ity Clay.
Pl? 1 0 to 3 Tan to br own, silty sand.
3 to 7.5 Pebble to 1-f oot boulder clasts with tan to black sand.
E17,_7, l
O to 4 fan, silty sand. Loose to weakly consolidated.
4 to 13 Grain supported sub-to well-rounded pebble-cobble clasts with 7
medtum black silty sand matria, some callche or, cobbles, loose to I
weekly consulidated.
Test Pat information provided by Golder Associates.
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S/HNP-PSAR 10/15/82 Appendix 2R Stratigraphic Investigation of the Skagit/Hanf ord Nuclear Project I
by l
Gary D. Webster and James W. Crosby III with Golder Associates Prepared f or Golder Associates Bellevue, Washington i
l l
Geological Engineering Section Washington State University Pullman, Washington 99164 November, 1981 (Amended October, 1982) 2R-i Amendment 28
S/HNP-PSAR 12/21/S1 g
j FIGURES NUMBER TITLE 2R-1 Location Map of the Pasco Basin Showing Study Area 2R-2 Major Structural Features in Study Area 2R-3 Lithologic and Geophysical Correlations of Coreholes 1 and 3 2R-4 Dri11 hole Location Map Showing Areas Discussed in Text 2R-5 Comparison of Gamma Ray Logs of Coreholes 1 and 3 Showing Correlating Units 2R-6 Comparison of Neutron-Epithermal Neutron Logs of Coreholes 1 and 3 Showing Correlating Units 2R-7 Structural Contour Map of the Top of Basalt 2R-8 Structural Contour Map of the Top of Basal Unit I 2R-9 Structural Contour Map of the Top of Upper Unit I s_,/
2R-10 Structural Contour Map of the Top of Unit II 2R-11 Structural Contour Map of the Top of Unit III 2R-12 Structural Contour Map of the Top of Unit IV 2R-13 Isopach Map of Basal Unit I 2R-14 Isopach Map of Upper Unit I 2R-15 Isopach Map of Unit II 2R-16 Isopach Map of Unit III j
2R-17 Isopach Map of Unit IV l
l 2R-18 Isopach Map of Ringold Formation 2R-19 Stratigraphic Cross-Sections, Southeast Anticline Area, Lines 1 and 4A 2R-20 Stratigraphic Cross-Sections, Southeast Anticline Area, Lines 2 and 3 2R-21 Stratigraphic Cross-Sections, Southeast Anticline
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S/HNP-PSAR 10/15/82 NUMBER TITLE 2R-22 Stratigraphic Cross-Sections, May Junction Area, Lines 1 and 2 2R-23 Stratigraphic Cross-Sections, May Junction Area, Lines 3, 8 and 8C 2R-24 Stratigraphic Cross-Sections, May Junction Area, Line 5 2R-25 Stratigraphic Cross-Sections, Site Area, Lines 1 and 4A 2R-26 Stratigraphic Cross-Sections, Site Area, Lines 4B and 4D 2R-27 Stratigraphic Cross-Sections, Site Area, Lines M and M/W 2R-28 Stratigraphic Cross-Sections, Site Area, Lines W and X-1 2R-29 Suggested Correlation of the Stratigraphic Section of the Skagit/Hanf ord Site with that of Myers and Price (1979) for the Pasco Basin 2R-30 Distribution of Unit II Green Waxy Clays 2R-A-1 Interpretive Petrographic Log, Drillhole 1 2R-A-2 Interpretive Petrographic Log, Drillhole 3 2R-A-3 Interpretive Petrographic Log, Drillhole 4 2R-A-4 Interpretive Petrographic Log, Drillhole 5 2R-A-5 Interpretive Petrographic Log, Drillhole 6 2R-A-6 Interpretive Petrographic Log, Drillhole 7 l
2R-A-7 Interpretive Petrographic Log, Drillhole 8 2R-A-8 Interpretive Petrographic Log, Drillhole 9
'2R-A-9 Interpretive Petrographic Log, Drillhole 10 2R-A-10 Interpretive Petrographic Log, Dri11 hole 11 2R-A-ll Interpretive Petrographic Log, Drillhole 15 2R-A-12 Interpretive Petrographic Log, Drillhole 17 l
2R-vi Amendment 28
S/HNP-PSAR 12/21/81 O-
_ NUMBER TITLE 2R-A-63 Interpretive Petrographic Log, Drillhole 101 2R-A-64 Interpretive Petrographic Log, Drillhole 10 2 2R-A-65 Interpretive Petrographic Log, Drillhole 103 2R-A-66 Interpretive Petrographic Log, Drillhole 104 2R-A-67 Interpretive Petrographic Log, Drillhole 105 2R-A-68 Interpretive Petrographic Log, Drillhole 106 2R-A-69 Interpretive Petrographic Log, Dri11 hole 108 2R-A-70 Interpretive Petrographic Log, Drillhole 109 2R-A-71 Interpretive Petrographic Log, Drillhole 110 2R-A-72 Interpretive Petrographic Log, Drillhole 111 2R-A-73 Interpretive Petrographic Log, Drillhole 112 2R-A-74 Interpretive Petrographic Log, Dri11 hole 113 k/
2R-A-75 Interpretive Petrographic Log, Drillhole 114 s
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2R-A-86 Interpretive Petrographic Log, Drillhole E-1 2R-A-87 Interpretive Petrographic Log, Drillhole E-19
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2R-ix Amendment 23
S/HNP-PSAR 10/15/82 NUMBER TITLE 2R-A-88 Interpretive Petrographic Log, Drillhole S-1 2R-A-89 Interpretive Petrographic Log, Drillhole S-2 2R-A-90 Interpretive Petrographic Log, Drillhole S-3 2R-A-91 Interpretive Petrographic Log, Drillhole S-4 2R-A-92 Interpretive Petrographic Log, Drillhole S-5 2R-A-93 Interpretive Petrographic Log, Drillhole S-6 2R-A-94 Interpretive Petrographic Log, Drillhole S-7 2R-A-95 Interpretive Petrographic Log, Drillhole S-8 2R-A-96 Interpretive Petrographic Log, Drillhole S-9 2R-A-97 Interpretive Petrographic Log, Dri11 hole S-10 2R-A-98 Interpretive Petrographic Log, Drillhole S-ll 2R-A-99 Interpretive Petrographic Log, Drillhole S-12 2R-A-100 Interpretive Petrographic Log, Drillhole S-13 2R-A-101 Interpretive Petrographic Log, Drillhole S-14 2R-A-102 Interpretive Petrographic Log, Drillhole S-15 2R-A-103 Interpretive Petrographic Log, Drillhole S-16 2R-A-104 Interpretive Petrographic Log, Drillhole S-17 2R-A-105 Interpretive Petrographic Log, Drillhole S-18 2R-A-106 Interpretive Petrographic Log, Drillhole S-19 2R-A-107 Interpretive Petrographic Log, Drillhole S-20 2R-A-108 Interpretive Petrographic Log, Drillhole S-21 2R-A-109 Interpretive Petrographic Log, Drillhole S-22 2R-A-110 Interpretive Petrographic Log, Drillhole S-23 2R-A-lll Interpretive Petrographic Log, Drillhole S-24 0
2R-x Amendment 28
S/HNP-PSAR 10/15/82 NUMBER TITLE 2R-A-ll2 I_nterpretive Petrographic Log, Drillhole MJ-1 2R-A-113 Interpretive Petrographic Log, Drillhole MJ-2 2R-A-ll4 Interpretive Petrographic Log, Drillhole MJ-3 2R-B-1 Natural Gamma Cross-Section, Line 1 2R-B-2 Natural Gamma Cross-Section, Line 2 2R-B-3 Natural Gamma Cross-Section, Line 3 2R-B-4 Natural Gamma Cross-Section, Line 4A 2R-B-5 Natural Gamma Cross-Section, Line 4B 2R-B-6 Natural Gamma Cross-Section, Line 4C 2R-B-7 Natural Gamma Cross-Section, Line 4D 2R-B-8 Natural Gamma Cross-Section, Line 5 2R-B-9 Natural Gamma Cross-Section, Line 6A 2R-B-10 Natural Gamma Cross-Section, Line 8 2R-B-10A Natural Gamma Cross-Section, Line 8C 2R-B-ll Natural Gamma Cross-Section, Line M 2R-B-12 Natural Gamma Cross-Section, Line M/W 2R-B-13 Natural Gamma Cross-Section, Line W 2R-B-14 Natural Gamma Cross-Section, Line X-1 2R-B-15 Neutron-Epithermal Neutron Cross-Section, Line 1 2R-B-16 Neutron-Epithermal Neutron Cross-Section, Line 2 2R-B-17 Neutron-Epithermal Neutron Cross-Section, Line 3 2R-B-18 Neutron-Epithermal Neutron Cross-Section, Line 4A 2R-B-19 Neutron-Epithermal Neutron Cross-Section, Line 4B 2R-B-20 Neutron-Epithermal Neutron Cross-Section, Line 4C 2R-xi Amendment 28
S/HNP-PSAR 10/15/82 NUMBER TITLE 2R-B-21 Neutron-Epithermal Neutron Cross-Section, Line 4D 2R-B-22 Neutron-Epithermal Neutron Cross-Section, Line 5 2R-B-23 Neutron-Epithermal Neutron Cross-Section, Line 6A 2R-B-24 Neutron-Epithermal Neutron Cross-Section, Line 8 2R-B-24A Neutron-Epithermal Neutron Cross-Section, Line 8C 2R-B-25 Neutron-Epithermal Neutron Cross-Section, Line M 2R-B-26 Neutron-Epithermal Neutron Cross-Section, Line M/W 2R-B-27 Neutron-Epithermal Neutron Cross-Section, Line W 2R-B-28 Neutron-Epithermal Neutron Cross-Section, Line X-1 2R-B-29 Neutron-Gamma Cross-Section, Line 1 2R-B-30 Neutron-Gamma Cross-Section, Line 2 2R-B-31 Neutron-Gamma Cross-Section, Line 3 2R-B-32 Neutron-Gamma Cross-Section, Line 4A 2R-B-33 Neutron-Gamma Cross-Section, Line 4B 2R-B-34 Neutron-Gamma Cross-Section, Line 4C 2R-B-35 Neutron-Gamma Cross-Section, Line 4D 2R-a-36 Neutron-Gamma Cross-Section, Line 5 2R-B-37 Neutron-Gamma Cross-Section, Line 6A l
2R-B-38 Neutron-Gamma Cross-Section, Line 8 i
2R-B-38A Neutron-Gamma Cross-Section, Line 8C 2R-B-39 Neutron-Gamma Cross-Section, Line M 2R-B-40 Neutron-Gamma Cross-Section, Line M/W O
2R-xii Amendment 28
S/HNP-PSAR 10/15/82 NUMBER TITLE 2R-B-41 Neutron-Gamma Cross-Section, Line W 2R-B-42 Neutron-Gamma Cross-Section, Line X-1 2R-B-43 Gamma-Gamma Cross-Section, Line 1 2R-B-44 Gamma-Gamma Cross-Section, Line 2 2R-B-45 Gamma-Gamma Cross-Section, Line 3 2R-B-46 Gamma-Gamma Cross-Section, Line 4A 2R-B-47 Gamma-Gamma Cross-Section, Line 4B 2R-B-48 Gamma-Gamma Cross-Section, Line 4C 2R-D-49 Gamma-Gamma Cross-Section, Line 4D 2R-B-50 Gamma-Gamma Cross-Section, Line 5 2R-B-51 Gamma-Gamma Cross-Section, Line 6A 2R-B-52 Gamma-Gamma Cross-Section, Line 8 2R-B-52A Gamma-Gamma Cross-Section, Line 8C 2R-B-53 Gamma-Gamma Cross-Section, Line M l
2R-B-54 Gamma-Gamma Cross-Section, Line M/W 2R-B-55 Gamma-Gamma Cross-Section, Line W 2R-B-56 Gamma-Gamma Cross-Section, Line X-1 2R-xiii Amendment 28
1 S/HNP-PSAR 12/21/81 OI 1
TABLES 1
NUMBER TITLE l
2R-1 XRF Analyses for Drillhole Samples
)
2R-2 Lithologic Characteristics and Criteria Used to Define Stratigraphic Units l
TyP cal Geophysical Characteristics of Units i
2R-3 O
l 1
l l
l l
l l
1 0
2R-xiv Amendment 23 l
S/HNP-PSAR 12/21/81 I( j 4.3 INTERPRETIVE PROCEDURES The Elephant Mountain Member of the Saddle Mountains Basalt Formation is the youngest basalt present throughout the study area (see Section 5.1 for details).
This flow is assumed to have been extruded over a geologically short period of time (Shaw and Swanson, 1970; Swanson and others, 1973).
The top of the flow probably had a nearly horizontal attitude in the Pasco Basin at the time that it crystal-lized.
A sequence of vesicular basalt grading downward into non-vesicular porphyritic basalt is recognized in both cores and cuttings throughout the study area.
Weathering of the top of the Elephant Mountain flow prior to the deposition of the overlying Ringold Formation is recognized in many cores and drill cuttings by the presence of a residual clay paleosol (B-and C-horizons) grading downward into unweath-ered vesicular basalt.
The time duration for the formation of this clay paleosol is unknown but could have been a few hundred to several tens of thousands of years, depending upon climatic conditions.
No major erosional relief is recognized on this surface throughout the Site, cecause the vesicular flow top is found in most drillholes penetrating the basalt.
Thus, the top of the Elephant Mountain flow is Judged to be a reliable horizon for stratigraphic and
/
structural interpretations.
k '}/
s~
Unit boundaries determined on the basis of the petrologic and geophysical analyses have been used as markers of strat-igraphic contacts.
These contacts are interpreted as having formed generally planar subhorizontal surf aces at the time of deposition and as being approximately time-correlative.
The subhorizontal surface interpretation is supported by the I
general presence of fine-grained sediments in the upper part of each unit.
These sediments would have been removed by erosion if much topographic relief had developed throughout the area prior to burial by the overlying unit.
The time-correlative interpretation is supported by the presence of volcanic ash in a paleosol near the top of Unit I in drillholes 1 and E-19.
Although not shown to be the same lithologic unit, an ash has also been identified in the Unit I paleosol in drill cuttings from each of the three sub-areas of this study.
The geochemical nature of the A-horizon gamma ray spike is not presently Known ; however, it is consistently associated with the upper part of the paleosol of Unit I, and the two are believed to be genetically related.
The paleosol con-sists of a light to dark olive gray mixture of clay, silt, and sand.
It contains weathered organic debris as seen in some cores and has been bioturbated.
It is interpreted to
/N be an aggrading soil A-horizon, developed in an alluvial
\\
h V
2R-9 Amendment 23
S/HNP-PSAR 10/15/82 environment.
Independent identification of the top of the paleosol from the drill cuttings and the geophysical A-horizon gamma ray spike from the geophysical logs for 93 drillholes throughout the study area resulted in the markers being within plus or minus 10 f eet of each other in 88 percent of the drillholes and within plus or minus 5 feet of 23 each other in 60 percent of the drillholes.
Statistically, therefore, and making allowance f or indexing errors, the A-horizon and paleosol appear coincident within expected experimental error, and this lends considerable credence to the value of the A-horizon as a stratigraphic marker.
For consistency in map construction, the geophysical A-horizon was selected as the top of Unit I.
In five drillholes (47, 28 96, 97, and 99 and MJ-2), the top of Unit I was determined from cuttings at the top of the paleosol; the geophysical A-horizon was not recognized or geophysical logs were not available f or these holes.
Other contacts used in the interpretation are those between Units II and III, III and IV, and between Unit IV and the Pre-Missoula Flood Gravels.
Each unit is bounded on top and bottom by unconf ormities.
The unconf ormities are recognized by the sharpness of the contact in cores and on the geo-physical logs and by the abrupt change in lithology from silts and sands below into gravels above.
Unconf ormities between the Ringold units were found to coincide with the contacts between coarse and fine depositional sequences that are well displayed on borehole geophysical logs.
Variations were noted in the type of fine-grained sediment below the same gravel unit as these contacts were traced laterally.
Although the boundaries might be expected to mark an irregu-lar surface, they have been f ound to be laterally continuous and to lie on apparently subhorizontal and subplanar sur-f aces throughout most of the study area.
The unconf ormities below Units I and II are developed upon paleosols.
Paleo-23 sols are not f ound at the tops of Units II through IV.
However, the upper, f ine parts of each of these units are commonly present and suggest 1) that little erosion occurred on the tops of these units af ter deposition, and 2) that the time between deposition and burial of the units was insuffi-cient for paleosols to develop.
These factors indicate that these contacts provide markers usef ul f or stratigraphic and structural interpretation where sufficient section is present to insure correlation of Ringold units.
The post-Columbia River Basalt history of the study area is l
based on an interpretation of structural contour maps (Figures 2R-7 to 2R-12), isopach maps (Figures 2R-13 to 2R-18), one-to-one scale cross-sections (Figures 2R-19 to 2R-28), and computer-drawn geophysical cross-sections (Figures 2R-B-1 to 2R-B-56, Appendix 2R-B-III).
These figures have been generated from the drillhole lithologic l
l 2R-10 Amendment 28
S/HNP-PSAR 12/21/81
)
contain mica and up to 20 percent mafics.
Erosional g j unconformities occur at the base and top of_ Unit III.
Based on lithologic similarity, Unit III gravels and fines are believed to correlate with the lower gravels,of the middle Ringold unit as defined by Tallman and others (1979).
Middle Ringold gravels are exposed at the base of the bluffs along the eastern side of the Columbia River south of Ringold Flat, approximately 8 to 12 miles east of the. study area.
5.2.2.4 Unit IV Gravelly cands to sandy gravels in the basal part of. Unit IV are lithologically like those in the base of Unit III and also grade upward into finer clastic sediments.
Fine sediments in the upper part of Unit IV are interbedded yellowish-gray to dusky-yellow silts, sands, silty sands, and sandy silts.
Grains are angular to subangular, moder-ately to well-sorted, contain up to 25 percent mafics, and commonly are uncemented.
They are megascopically very similar to the fine-grained sediments in the upper part of Unit III.
Based on lithologic similarity, the gravels of Unit IV are believed to correlate with the upper gravels of the middle Ringold unit as defined by Tallman and others (1979).
Fine sediments of Unit IV are considered to correlate with the basal part of the upper Ringold unit of Tallman and others (1979).
Both middle and upper Ringold sediments are exposed along the bluffs on the eastern side of the Columbia between Taylor and Ringold Flats in the eastern part of the Pasco Basin.
I 5.2.3 BOREHOLE GEOPHYSICAL CHARACTERISTICS OF THE RINGOLD UNITS Throughout most of the central and southern part of the I
l study area, the Ringold sequence displays a uniform but somewhat atypical group of geophysical characteristics.
They are atypical in tuat the natural gamma activity of many of the coarse clastic zones is greater than that of tne l
associated fine clastics.
This is contrary to the normal i
expectation for an alluvial environment, whereas the poros-ity and density responses, as indicated on the neutron logs, are generally typical of such settings. ' Individual fine and coarse clastic sequences commonly can be traced on the geo-l physical logs for considerable distances (to the limits of f
2R-19 Amendment 23 l
l
S/HNP-PSAR 10/15/82 the study area in the case of some fine-grained units).
More detailed inf ormation on the geophysical characteristics of each stratigraphic unit and the resolution of the bore-hole geophysical responses is presented in Appendix 2R-B-II.
Table 2R-3 summarizes the geophysical characteristics of each unit.
Source-detector spacing of the neutron-epithermal neutron tool used in these investigations moved the neutron response beyond the " cross-over" zone, so that increases in hydrogen, or water content, lowered the number of detectable epither-mal neutrons.
Accordingly, a high water content in the sediments causes a reduction in neutron flux or an excursion to the lef t on the logs.
As fine-grained sediments charac-teristically have higher percentages of interstitial voids than do coarse sediments, they have higher porosities, contain more water, and display reduced neutron activity.
Therefore, the sedimentary units can be seen on the neutron logs to represent generally fining-upwards cycles of deposi-tion and to display typical neutron responses.
Comparison of logs f rom certain adjacent drillholes suggests the presence of minor local cut-and-fill structures within cycles.
It is evident, too, that f acies changes are common in some of the units, as would be anticipated in an alluvial depositional environment.
Where facies change rapidly, some subtle geophysical markers probably cannot be f ollowed with confidence in drillholes more than a few hundred feet apart.
In the southern part of the Southeast anticline area, in the eastern part of the May Junction area, and in'the Site area (Figure 2R-13), drillholes commonly intercept the basal con-glomeratic and gravel unit below the fine-grained sequence of sedimentary Unit I.
This conglomeratic-gravel unit has been treated as though it were the basal unit of Unit I.
However, the physical and chemical characteristics of these deposits as indicated by the geophysical logs are grossly dif f erent f rom the overlying Ringold section.
The basal conglomerate of Unit I has a higher density and lower poros-ity than younger gravels in cores of drillholes 73 and 78 and could cause gravimetric determinations of depth to basalt to be in error.
Over the Southeast anticline and the May Junction monocline, the Unit I section thins, largely through tne elimination of 28 the gravel facies but also by thinning of the fine-grained clastic f acies.
In these areas, the characteristic geophysical signatures of the units on the logs are more 23 subtle than in the remainder of the study area.
O 2R-20 Amendment 28
_ - _ =..
1 I
S/HNP-PSAR 10/15/82
- b. More sediment was transported into the Pasco Basin during Ringold, Pre-Missoula, and Missoula l
times than could be removed, or general subsidence of the Pasco Basin occurred during this time interval, l
- c. Coarse-grained sediments of the Missoula Flood Gravels were derived from different areas and were deposited by different processes than the 23 coarse-grained Ringold sediments, and
- d. Coarse-grained sediments of the Pre-Missoula Flood Gravels were derived from the same areas but were deposited by a different process than j
those of the Ringold sediments.
l 4.
Gravels of Basal Unit. I contain many non-basaltic clasts, thin to the northeast and northwest, and l 28 j
are confined to the central and southern parts of the study area. This suggests that:
23 i
- a. The Southeast anticline and May Junction mono-l cline were low-lying positive areas while the 28 i
gravels of Basal Unit I were being deposited, and s
- b. Offlap, pinchout, or infilling of structural lows in the study area to the south and west of the Southeast anticline and south and east of 28 the May Junction monocline occurred during Basal Unit I time.
5.
Gravels of Basal Unit I thicken in the southern part of the May Junction area and thin to the east.
Fine-grained sediments of Unit I are thin in the southwestern part of the May Junction area and thicken to the east.
Basal gravels of Unit I are thinner (approximately 25 feet) in drillhole S-3 than in all surrounding drillholes.
Fines of Unit I are considerably thicker (approximately 45 f eet) in drillhole S-3 than in all surrounding drill-holes.
This is interpreted in the following manner:
23
- a. A change of facies is believed to occur in Unit I with the basal gravels interfingering into fine sediments in the southwestern to eastern part of the May Junction area and in the vicinity of drillhole S-3 in the Site area, and
- b. The fine-grained sediments in the upper part of Unit I are a part of the same depositional j
cycle as the basal gravels but represent a i
decrease in the energy level.
1 l
2R-25 Amendment 28
S/HNP-PSAR 10/15/82 6.
Sediments in Upper Unit I are composed of olive-gray to brownish-gray silts and clays with some very fine to fine sand.
They are uncemented, contain organic fragments, are bioturbated in some 23 areas, and may show thin laminations.
They are present throughout the study area except along the northwestern part of the crest of the Southeast anticline and the crest of the subsurface ridge of basalt on the western side of the May Junction mono-28 cline in the May Junction area.
These sediments are interpreted as:
- a. An aggrading paleosol, probably developing on a flood plain, and
- b. An indication of landscape stability for the late part of Unit I time.
23 7.
Upper Unit I sediments are present throughout the study area except along the northwestern part of the crest of the Southeast anticline (drillholes 105, 34, 38, and 37) and the crest of the subsur-face basalt ridge on the western side of the May Junction monocline (drillholes 92 and MJ-3).
They l 28 thin around these structures and thicken to the southeast.
This is interpreted in the following manner:
- a. Paleoslopes existed to the southeast during Upper Unit I time, and
- b. The Southeast anticline and subsurf ace basalt ridge west of the May Junction linear were low-lying positive areas during deposition of the Upper Unit I sediments or were uplif ted and stripped cf Upper Unit I sediments prior to deposition of Unit II sediments.
8.
Fine sediments of Unit II are characterized by varicolored to gray-green waxy clays throughout the study area to the south and west of the Southeast anticline.
This suggests that:
- a. The area to the south and west of the Sout mest anticline was the site of deposition of very fine-grained sediments during part of Unit II time, and
- b. These sediments reflect low energy environments or that source areas were providing only fine-grained sediments during this time.
O 2R-26 Amendment 28
S/HNP-PSAR 12/21/81 r~x f
Basal Unit I gravels are present to the southwest of the
\\'
Southeast anticline area.
They thin, pinch out, or have been removed by erosion across the anticline, suggesting that the structure was a positive area during Basal Unit I time.
The Basal Unit I gravels are not present on the northeastern side of the structure.
Structural and topo-graphic relief on the Southeast anticline must have been low during Basal Unit I time or the clay paleosol on top of the basalt would have been removed by erosion.
Uper Unit I fine-grained sediments thin across the south-eastern part of the Southeast anticline.
The northwestern part of the crest of the structure lacks Upper Unit I sediments, suggesting that this part of the structure was either a positive area during Upper Unit I time or that post-depositional erosion removed the sediments.
The presence of the paleosol at the top of Upper Unit I Sediments across the southeastern part of the Southeast anticline indicates landscape stability in late Unit I time for the Southeast anticline area.
Minor erosion of Upper Unit I sediments is interpreted in the vicinity of drillhole 99 on the southeastern end of the structure.
Within the Southeast anticline area, Unit II sediments are unconformable above Unit I, thin at least 132 feet toward
(]N the Southeast anticline, and are interpreted to cross the g
southeastern part of the structure.
The gravel horizon occurring to the southwest in the lower part of Unit II pinches out toward the anticline.
The varicolored and gray-green waxy clays common in the upper parts of Unit II in the southern and central parts of the study area are not present over the Southeast anticline.
Loss of tne basal gravels and waxy clays and thinning of Unit II sediments over the Southeast anticline suggests that the structure was a positive feature during Unit II time; some uplif t and erosion could have occurred following deposition of these i
sediments.
Channeling of Upper Unit II fines in the vicin-ity of drillhole 99 is believed to have occurred.
Probable dune sand and find-grained fluvial sediments at the top of Unit II show no evidence of the development of a paleosol.
Units III and IV both thin toward the flanks but do not cross the crest of the Southeast anticline.
Such behavior may be a result of erosion or non-deposition, and it is here interpreted that the Southeast anticline was a positive area during Units III and IV time.
Glaciofluvial sediments of the Pre-Missoula Flood Gravels unconformably overlie the Ringold across the Southeast anticline.
Their presence, however, is uncertain over the northwestern part of the structure along Line 3 in drill-
}
holes 37 and 38 (Figure 2R-20).
In the vicinity of (V
2R-29 Amendment 23
S/HNP-PSAR 10/15/82 drillholes 54, 55, 68, 99, 101, and 103, Pre-Missoula Flood Gravels are noted to fill a channel cut into the Ringold sediments.
Missoula Flood Gravels unconformably overlie the Pre-Missoula Flood Gravels throughout the Southeast anti-23 cline area, and surficial dune sands and fluvial deposits of Recent age are present over most of the area today.
No def ormation of any of the post-Ringold sediments is recog-nized in the southeast anticline area.
A f ault was recognized on the southwestern flank of the Southeast anticline (Figure 2R-7) on the basis of f ault bree-cia and an anomously thick section of the Elephant Mountain member in corehole 125.
A study carried out by Golder Asso-ciates (1982) for Washington Public Power Supply System determined the attitude, displacement and capability of this fault.
Eleven drillholes, spaced 30 to 100 f eet apart, indi-cate that the fault has a reverse sense of movement, strikes N390W and dips 30 SW.
The range of vertical displacement on 0
the fault is 35 to 60 feet, and the range of dip-slip displacement is 70 to 110 f eet.
Based on this small amount of displacement, the Souteast anticline fault is interpreted 28 to be a minor feature which probably does not extend any significant distance away f rom corehole 125.
Four strati-graphic contacts across the projection of the fault plane (Elephant Mountein basalt /Ringold Upper Unit I contact, the contact of a lower fine-grained and upper coarse-grained subunit of Ringold Upper Unit I, Ringold Upper Unit I/Rin-gold Unit II contact and Ringold Unit II/ Pre-Missoula contact) showed no abrupt changes in elevation.
Based on these observations, the Southeast anticline fault has not been active f or approximately 10 million years.
It has clearly not been active since Pre-Missoula time (730,000 years bef ore present) and is, theref ore, not capable.
Based upon the similarity of structural patterns in the cross-sections, structural contour, and isopach maps, and the amount of thinning of stratigraphic units displayed in these illustrations, the Southeast anticline is interpreted to have developed intermittently throughout Ringold time.
23 Def ormation may have been most intense during Unit II and Unit III time and diminished during Unit IV time.
6.2.2 MAY JUNCTION AREA The May Junction area includes the May Junction monocline and the area between the monocline, the Southeast anticline, and the Site area.
The north-south-trending May Junction 28 monocline is defined by the eastern boundary of a gravity high associated with the Gable Butte / Gable Mountain segment of the Umtanum Ridge / Gable Mountain structural trend (Weston 2R-30 Amendment 28
S/HNP-PSAR 10/15/82 O
Geophysical Corp., 1981b).
Relief on this feature is approx-imately 300 feet, with a slope of 10 degrees or less on the 28 basalt surface.
To the east, a gentle southward-slipping (less than 1 degree) surf ace forms the northern flank of a 23 southeasterly-plunging syncline.
The Ringold Formation thins over the basalt high to the west of the May Junction monocline as shown on the isopach map (Figure 2R-18) and the l 28 cross-sections (Figures 2R-22 to 2R-24).
Because a complete stratigraphic sequence of Ringold sediments is not present, correlations over this structure are questioned.
Gravels of Basal Unit I are present throughout the area except where they pinch out or have been removed by erosion on the flank of the Southeast anticline and over the northern part of the May Junction monocline on Line 8.
The 28 interpretation that the Basal Unit I gravels overlie the structure on the southwestern end of Line 3 suggests that def ormation of this structure occurred af ter the deposition of the gravels.
Upper Unit I fine-grained sediments in the May Junction area are interpreted to thin or interfinger with a thickened 23 gravel interval in the southwestern part of the area.
o.
('~'
A normal sequence of Unit II sediments is present in the eastern part of the May Junction area.
To the southwest (Line 3) the gray-green waxy clays become varicolored.
These sediments generally thin toward the May Junction mono-cline and are interpreted to pinch out or have been removed by erosion over the northern part of the structure in the vicinity of Lines 8 and 8C.
Unit III and Unit IV sediments are interpreted to be present only on the flanks of the mono-l cline.
The absence of Units I through IV could be a result of erosion or non-deposition.
Pre-Missoula and Missoula t
Flood Gravels overlie the Ringold sediments.
The shallow and uniform dip of the sediments and basalt units across the May Junction monocline, and the generally unif orm and typical thickness of the Elephant Mountain 28 member and Rattlesnake Ridge interbed encountered along Line 8 and 8C, indicate that the May Junction monocline is not fault controlled.
The shallow dip of stratigraphic units (7 to 10 degrees) indicates that, although the monocline is a prominent geophysical f eature, only minor def ormation has taken place in the basalt or overlying sediments along the trend of the monocline.
This minor def ormation has clearly been accommodated by the warping which produced the mono-cline.
It is postulated that def ormation of the May Junction O
monocline commenced in post-Elephant Mountain Member time (less than 10.5 million years B.P.) and probably 2R-30a Amendment 28
S/HNP-PSAR 10/15/82 diminished in Unit IV time (early Pliocene).
No deformation is recognized in the post-Ringold sediments in the May Junction area.
6.2.3 SITE AREA The structural contour map on top of basalt in the Site area 23 (Figure 2R-7) indicates that the basalt surface underlying the Site area is of generally low relief, with typical slopes on the order of 1 degree or less.
The relief on the basalt surf ace is interpreted to be the result of gentle f olding which has produced three dominant f eatures.
These are the Cold Creek syncline in the southern part of the Site area, an unnamed gentle east-west trending anticline in the
)
O i
2R-31 Amendment 28
S/ HHP-PSAR 12/21/81 central part of the Site area, and a syncline along the northern edge of the Site area.
The Cold Creek syncline trends northwest and plunges gently to the southeast through the Site area (Myers and Price, 1979).
A local depression occurs along the axis of the syncline in the vicinity of drillhole S-16.
The bedrock surface in the lowest portion of this depression is approxi-mately 150 feet below the surrounding bedrock surf ace.
The syncline is asymmetrical, with the steeper southwestern limb formed by a northwest trending flexure in the Site area (Weston Geophysical Corp., 1981a).
The maximum slope on the southwestern flank of the syncline is approximately 5 degrees.
Along Line X-1 (Figure 2R-20), which generally parallels the axis of the syncline, Ringold Units I through III maintain a constant thickness and parallel the basalt surface ; however, the upper fine-grained part of Unit IV is thinner in drill-hole S-17 than elsewhere on Line X-1.
This reduced thick-ness is due either to erosion or non-deposition and suggests uplift of the basalt underlying the Ringold section in this area during or after the deposition of Unit IV sediments.
Ringold Units III and IV are interpreted to be absent in drillhole S-24 on Line 4D (Figure 2R-26) on the southwestern flank of the Cold Creek syncline.
The absence of these units suggests similar uplift and erosion after Unit II time and possibly during or after Unit IV time.
A small, generally east-west trending anticlinal feature occurs on the bedrock surface on the northern limb of the Cold Creek syncline.
The relief across this flexure is 250 feet on the southern flank and 100 feet on the northern flank, with the northern flank sloping more steeply (maximum of 3. 5 degrees).
The Ringold formation is warped over the anticline, and the upper, fine-grained part of Ringold Unit IV is thinner over the structure along Line 1 (Figure 2R-25), Line M (Figure 2R-27), and Line W (Figure 2R-28).
The reduced thickness of Unit IV may be interpreted to suggest that upwarping of the anticline and consequent thinning of Unit IV by erosion or non-deposition occurred during or shortly af ter Unit IV time.
With the exception of drillhole S-24 on Line 4D, the entire Ringold section is present in the Site area.
Thinning or elimination of Unit IV occurs only over bedrock highs, suggesting that deformation in the Site area occurred during or after Unit IV time (early Pliocene).
Uplift and erosion along Line 4D clearly occurred af ter Unit II time, probably during or after Unit IV time, to be consistent with the time of deformation of the surrounding structures.
No deforma-tion is recognized in the post-Ringold sediments which are present throughout the Site area.
2R-32 Amendment 23
S/HNP-PSAR 10/15/82 REFERENCES Brown, R.
E.,
and Brown, D. J.,
1961, The Ringold Formation and its relationship to other formations:
HW-SA-2319, General Electric Co., Richland, WA.
Clague, J.
J., Armstrong, J.
E.,
and Mathews, W.
H.,
- 1980, Advance of the Late Wisconsin Cordilleran ice sheet in southern British Columbia since 22,000 Yr B.P.:
Quat. Res.,
vol. 13, p. 322-326.
Collinson, J.
D., 1978, Alluvial sediments,,ijj Sedimentary environments and f acies (H. G. Reading, ed.):
- Elsevier, N.Y.,
p.
15-60.
Fulton, R.
G.,
cnd Smith, G. W.,
1978, Late Pleistocene stratigraphy of south-central British Columbia:
Canadian Jour. of Earth Science, vol. 15, p. 971-980.
Golder Associates, 1982, The Southeast Anticline Fault:
Evaluation of Attitude and Displacement.
Report prepared for Washington Public Power Supply System.
Gustafson, E.
P.,
1978, The vertebrate f aunas of the i (
Pliocene Ringold Formation, south-central Washington:
Bull.
(
of the Museum of Natural History, Univ. of Oregon, no. 23.
I i
Holden, G.
S.,
and Hooper, P.
R.,
1976, Petrology and chemistry of a Columbia River basalt section, Rocky Canyon, west-central Idaho:
Geol. Soc. Amer. Bull., vol. 87, p. 215-t 225.
Hooper, P.
R.,
Reidel, S.
P., Brown, J.
C.,
Holden, G.
S.,
Kleck, W.
D.,
Sundstrom, C.
E.,
and Taylor, T.
L.,
- 1981, Major element analyses of Columbia River Basalt Part I:
Wash. State Univ., Dept. of Geology Open file rept.
Leopold, E.
B.,
and Nickmann, R.,
1981, A late Miocene pollen and spore flora f rom the Hanf ord Reservation, eastern Washington:
Rept. to Golder Associates.
McDougall, I., 1976, Geochemistry and origin of basalt of the Columbia River group, Oregon and Washington:
Geol. Soc.
Amer. Bull., vol. 87, p. 777-792.
McKee, E.
H.,
Swanson, D.
A.,
and Wright, T.
L.,
- 1977, Duration and volume of Columbia River basalt volcanism, Washington, Oregon, and Idaho:
Geol. Soc. Amer. Abstracts with Programs, vol. 9, no. 4, p. 463.
2R-33 Amendment 28
S/HNP-PSAR 10/15/82 Mullineaux, D.
R., Wilcox, R.
E.,
Ebaugh, W.
F.,
- Fryxell, R.,
and Rubin, M.,
1977, Age of the last major scabland flood of eastern Washington, as inf erred f rom Associated ash beds of Mount St. Helens Set S:
Geol. Soc. Amer. Abstracts with Programs, vol. 9, no. 7, p. 1105.
Myers, C. W.,
and Price, S.
M.,
1979, Geologic studies of the Columbia Plateau:
RHO-BWI-ST-4, Rockwell Hanf ord Operations, Richland, WA.
NTIS, 1975, Well logging manual:
prepared f or U. S. Geol.
Survey, by Scientific Software Corp., PB-247 641.
Packer, D.
R.,
and Johnston, J.
M.,
1979, A preliminary investigation of the magnetostratigraphy of the Ringold Formation:
RHO-BWI-C-42, Rockwell Hanford Operations, Richland, WA.
Pirson, S.
J.,
1963, Handbook of well log analysis:
Prentice-Hall Inc., Englewood Cliffs, N.J.
Shaw, H.
R.,
and Swanson, D.
A.,
1970, Eruption and flow rates of flood basalts, in Proceedings of the Second Columbia River Basalt Symposium:
Eastern Wash. State College, p. 271-299.
Swanson, D.
A., Wright, T.
L.,
and Helz, R.
T.,
1973, Linear vent systems and estimated rates of magma production and eruption f or the Yakima Basalt on the Columbia Plateau:
Amer. Jour. Sci., vol. 275, p. 877-905.
Swanson, D.
A., Wright, T.
L.,
- Hooper, P.
R.,
and Bentley, R.
D.,
1979, Revisions in stratigraphic nomenclature of the Columbia River Basalt Group:
U. S. Geol. Survey, Bull. 1457-G.
Tallman, A.
M.,
Fecht, K.
R.,
Marratt, M.
C.,
and Last, G.
V.,
1979, Geology of the separation areas, Hanford site, south-central Washington:
RHO-ST-23, Rockwell Hanf ord Operations, Richland, WA.
- Waitt, R.
B.,
Jr.,
1980, About f orty last-glacial Lake Missoula jokulhlaups through southern Washington:
Jour. of Geology, vol. 88, p. 653-679.
Weston Geophysical Corp., 1981a, Geophysical investigations, Skagit/Hanf ord Nuclear Project Site, Hanf ord Site, Washington, Appendix 2L:
Northwest Energy Services Company, Kirkland, WA.
O 2R-34 Amendment 28
S/HNP-PSAR 10/15/82 Weston Geophysical Corp., 1981b, Geophysical investigations of the Gable Mountain-Gable Butte area, Appendix 2K:
Northwest Energy Services Company, Kirkland, WA.
Wright, T.
L., Grolier, M.
J.,
and Swanson, D.
A.,
- 1973, Chemical variation related to the stratigraphy of the Columbia River basalt:
Geol. Soc. Amer. Bull., vol. 84, p.
371-386.
Wright, T.
L.,
and Hamilton, M.
S.,
1978, A computer-assisted graphical method f or identification and correlation of igneous rock chemistries:
Geology, vol. 6, p. 16-20.
Wright, T.
L.,
Black, K.
N.,
Swanson, D.
A.,
and O'Hearn, T.,
1980, Columbia River basalt; 1978-1979 sample data and chemical analyses:
U.S. Geol. Survey Open-file rept.80-921.
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S/HNP-PSAR 10/15/82 DRILL HOLE 97 SAMPLE TYPE Page 1_ of _L Project No : 803-1701H @ Cuttings Elevation : 513. 2 f t. 95 E Core, Number indicates % Core Recovery Total Depth. 339 ft. Coordinates : N 453,790.15; E263,334.41 C 2015 @ XRF, With Sample Number Date Completed : 9/18/80 Chemical Results Listed in Table 2R-1 LNt Column Refers to General Stratigraphic Divisions identified Within the Site Area: M - Missoula IV - Ringold. Unit IV Columbia River Basalt Group PM - Pre-Missoula Ill - Ringold. Unit lli Tem - Elephant Mountain Member 11 - Ringold. Unit il Ter - Rattlesnake Ridge Interbed 1-u - Ringold. Unit 1-upper Tp - Pomona Member 1-b - Ringold. Unit I-basal 8 - Basalt. Undifferentiated Elevation Depth cM* s\\ LO Lithologic Description Unit (MSL) (ft.) e os* hi ' *,(d Gravelly silty SAND. Lig ht-olive-brow n. Very-fine-to fine-and coarse-510 ? to very-coarse-grained. Gravel 85% basalt clasts. -[{ij.- Silty sandy GRAVEL. 70% basalt clasts. Sand coarse-to very-coarse-t' y ' '. ' ' grained; angular to subrounded. ^ -10 Sandy GRAVEL. 70% basalt clasts. Sand very-fine-to coarse grained; 500 -,, a M: angular to subangular; 35% mafics. 4,'. *. * -20 ^ U C;.' 490 -- , 4 *.'.,'. M 1 * *. =, 40 Silty CRAVEL. 80-90% basalt clasts. 480 -- 3 4,.7 * :*. j '...r. m '.* t J -40 470 - E*. '.[*.*6 Silty sandy CRAVEL. 80% basalt clasts. Sand coarse-to very-coarse-ut,..... it.'/:d? q_rsined, some medium-Crave'IIy~siTty3A'NU. gained; angular to subrounded. - 50 Fant-to very-coarse-grained, mostTy medium-k,.: 460 - ' WN grained. 20% mafics. Silt adheres to grains. .'( *, ;. Silty CRAVEL. 40% basalt clasts. Silt adheres to clasts. No cement. -60 ^ .'4 v.: 7 -f.7 N; Silty sandy GRAVEL. 35% basalt clasts. Sand medium-to very-coarse-PM 450 -. i _ 9 k ?..- grained. fining downward; angular to subrounded; 20-30% mafics, ? - 70 . [. decreasing with depth. Silt adheres to grains. No cement. 440 - I l -80 l'l, I,l SILT. Yellowish-gray. Subrounded fragments. l,,l l ~ 430 - 37 Sandy SILT. Yellowish-gray. Subrounded fragments. Sand very-i l 2 fine-grained. -90 i l 420 - 1: _.: u =. - 2- _e Il ? -100 y 28 410 - Ek'd Silty CLAY. Light-brown. Subrounded fragments. Ts -- -110 I_ d_ _ l 400 - N_-._ f:S ~ - - 7~._ M 120
- --^-#
l 390 - SM5 CLAY. Light-brow n. Subrounded fragments. -y Sandy CLAY to clayey SAND. Moderate-brown. Sand very-fine-grained. g 3 -130 T- - PUGET SOUND POWER & LIGHT COMPANY LOG OF DRILL HOLE 97 FIGURE SKAGIT / HANFORD NUCLEAR PROJECT 2R-A-59 Amendment 28
S/HNP-PSAR 10/15/82 DRILL HOLE C-1 SAMPLE TYPE Pa9e 1 of 8 Project No : 823-1036 gg Elevation : 476.3 ft. ^ 95 Core, Number indicates % Core Recovery Total Depth : U1 0 ft-C2015 @ XRF, With Sample Number \\ Coordinates : M 1 449 11-F?64Att ?1 Date Completed : 9/15/82 Chemical Results Listed in Table 2R-1 Unit Column Refers to General Stratigraphic Divisions identified Within the Site Area : M - Missoula Ill - Ringold. Cycle ill B - Basalt,Undif ferentiated EM - Elephant Mountain Member PM - Pre-Missoula II - Ringold, Cycle il RR - Rattlesnake Ridge Interbed IV - Ringold. Cycle IV I - Ringold. Cycle i P - Pomona Member g d k0 Lithologic Description Unit Elevation Depth h@* (f t.MSL) (feet) C>t
- f}h{I8 Cravelly silty SAND. Light-olive-brown. Medium-to very-coarse-grained.
,l ..h S 470 - 2 Cravelly silty SAND. Olive-gray. Very-fine-to very-coarse grained. ' ' 14 fining with depth. 60 to 75% basalt grains. Angular to subrounded. - 10 1
- JS
. ci e'; 7 ,.J J u
- Je 460-m.,o ys sh c
Gravelly silty SAND. Medium-dark-gray grading to medium-gray at 30 to - 20
- -- g 1 :. '
',' I.i 35 ft. 55 to 80% basalt grains, decreasing with depth. Very-fine-to s 3 very-coarse-grained. Angular to subrounded. Gravel 75% basalt clasts. \\ , T _4. h' 450 - 1 e - 30 2 0 ' i .j Y 440 - 18 # Silty CRAVEL to gravelly SILT. Light-olive-gray. ferruginous stain. - [ Cravel basaltic; possibly caved. 1 -40 M ~ r Gravelly SILT to silty GRAVEL light-olive-gray, 1 Jl ' i k t J {Q /l Cravelly sandy SILT to silty sandy CRAVEL. Light-olive-gray. Spotty 430 - 3 ferruginous stain. Sand very-fine-and medium-to coarse-grained. M,. ltig 1 6 PM - 50 t.i.$;,- Nt g k.(/{, Silty sandy CRAVEL. 30 to 50% bar.C t clasts, decreasing with depth. 2-Sand very-fine-to very-coarse-grained; mostly coarse-to very-coarse grained; 20% basalt grains. a.{D C
- .t.
- 60 qg h}t' Cravelly SAND. Yellowish-gray. Fine-to medium-grained. 10% mafics. 7
- o~
Angular to subangular. Trace silt. ?. [ 9 PUGET SOUND POWER & LIGHT COMPANY Fi uRE LOG OF DRILL HOLE MJ-1 SKAGIT l HANFORD NUCLEAR PROJECT 2R-A-112 Amendment 28
s/HNP-PSAR 10/15/82 DRILL HOLE u-1 Page 2__ of.fL._ 8 k ( Dep h c@
- gc Uthologic Description Unit 10-
-.g. Sandy CRAVEL. 20% basalt clasts. Sand fine-to coarse-grained; 10 to 15% 7 'c ',4..* mafics; angular. Trace silt. '..p. - 70 . *.fo Cravelly silty SAND. Yellowish-gray to light-olive-gray. 20 to 25% 6 - il' mafics. Very-fine-to coarse-grained. Angular to subangular. A~k gh,*A.g ( Cravelly SAND to sandy CRAVEL. Yellowish-gray to light-olive-gray. Fine-400-y 6 to very-coarse-grained; mostly very-coarse-grained. 30% basalt grains. - 80 Q .t; *m! M,,c[e Cravelly silty SAND. Yellowish-gray to light-olive-gray. Very-fine-to + s very-coarse-grained. Crain nize decreases and sorting is poorer with dept). . e ;! g 25 to 30% basalt grains. Silt increases with depth. 390-N ^ k .I i .1 - 90 .4,. g. [ <.{. *g.* [,Silty sandy CRAVEL to gravelly silty SAND. 45% basalt clasts. Sand as PM + q above.
- Ib*
Crave 11y silty SAN ~D. Yellowish-gray to light-olive-gray. Very-fine-to 380-a'!eM. medium-grained; mostly medium-grained. 15 to 20% mafics. Local ferru-i . *, 19 c ginous stain. -100 . T:.
- O
~ .' 'l. i.'[*.
- Silty sandy GRAVEL. Matrix as above. Local ferruginous stain. No sandy 7
cement rinds. ' ~ .*I.,1* :t. e,'e
- Gravelly silty SAND to silty sandy CRAVEL. Yellowish-gray. Very-fine-0 N,,.[,/,
370-v to coarse-grained. 10 to 15% mafics. No sandy cement rinds. - 110
- x. :.:.
Cravelly SAND to sandy CRAVEL. Yellowish-gray. Fine-to medium-grained. 7l*J ',, 7 to 10% mafics. Angular to subangular. Clean. Gravel 15% basalt
- " **I " " Y ****" #
( 360-m[;,::.- r- ,**e' (4 3,, -120 4ik Sandy GRAVEL to gravelly SAND. Sand as above. Some pebbles with yellow [;.j[O L g sandy cement rinds (reworked Ringold?). 1 n:. C .t 350- ,.MW 6 y.3,9 I 6: ' ;.,_ g - o. C.,q... l -130 E *
- Gravelly SAND. Yellowish-gray to dusky yellow.
Fine-to medium-grained; I , ;., 0s mostly medium-greined. 7-10% mafics..mgular to subangular. Abundant I ' j-gravel clasts with yellow sandy cement rinds. IV 340-
- <f-
".;pg q l -140 ofka 7 ;*30 ? + o; ;1 .g { l FIGURE PUGET SOUND POWER & LIGHT COMPANY LOG OF DRILL HOLE MJ-1 SKAGIT l H ANFORD NUCLEAR PROJECT 2R-A-112 Amendment 28
S/HNP-PSAR 10/15/82 DRILL HOLE m-1 page_2_. t_jt_ 'y,* f.'" Depth s\\ Lithologic DescrIDtion c Unit \\j MSLI (feet) et gl. w :..g. 330-1W., *. ggf.* J. Silty sandy GRAVEL. Matrix yellowish-gray to dusky yellow. Sand fine-to -150 g* *
- P medium-grained; mostly medium-grained; 5 to 7% mafics; angular to sub-
. b, '.*/ angular. Yellow sandy cement rinds on gravel clasts. _ **1: [ Id. f..* u 320- _ s. Cravelly SAND. Yellowish-gray grading downward to dusky yellow. Very- -160 fine-to medium-grained; mostly medium-grained. 5 to 7% mafics. Angular - e' to subangular. Abundant yellow sandy cement rinds. a e c e* 310 - 'l l[ Silty SAND. Yellowish-gray to dusky yellow. Very-fine to medium-grained; i e mostly fine-to medium-grained. 5 to 7% mafics. Trace gravel. 3y -170 h I I, Silty SAND to sandy SILT. Dusky yellow. Very-fine-grained. h, ' lf Ibi. I d 300 - L - 180 4 { 7 to 10% mafics. Angular to subangular. Trace silt from 180 to 190 ft. SAND. Yellowish-gray. Fine-to medium-grained; mostly medium-grained. 290-Micaceous at 185 to 190 ft. and 195 to 200 ft. Trace gravel with yellow sandy cement rind at 195 to 200 ft. - 190 ~ 7 m 2 280 - A a. l -200 y I l l].T* f}.((. yellow sandy cement rinds. Sandy CRAVEL to gravelly SAND. Yellowish-gray to dusky yellow. Abundant I h l < 'l Yi 1 ,,,.*j Gravelly SAND. Dusky yellow. Local ferruginous stain and cement. ? i
- g l
- 210 Gravelly SAND. Light-olive-gray. Fine-to medium-grained; mostly .. e medium-grained. 15 to 20% mafics. Wood fragments. Micaceous. Sandy cement rinds. 260 - SAND. Light-olive-gray. Very-fine-to medium-grained; mostly medium-77) grained. 20% mafics. Micaceous. I -220 ,,,i ?,... ' ' CRAVEL. Trace sand. 15 to 20% basalt clasts. Trace sandy cement rinds. l PUGET SOUND POWER & LIGHT COMPANY LOG OF DRILL HOLE MJ-1 FIGURE SKAGIT / HANFORD NUCLEAR PROJECT 2R-A-112 Amendment 28
S/IINP-PSAR 10/15/82 DRILL HOLE MJ-2 Page I _of 8_ E[* Depth gc Lithologic Descriptiori Unit 250 - M.m* *...
- , *., - CRAVEL, as above. Pyrite on some clasts.
I."..*.' - 230 M* . l.,., Sandy CRAVEL. 35% basalt clasts. Local pyrite. Minor yellow sandy g3 i l. *, * * ?, cement rinds. Sand matrix fine-to medium-grained. '.*..I< 240 - Cravelly sandy SILT, with CLAY and ash-like f rag nents. Very-light-gray, ] gyp olive-gray, and light-olive-gray. Gravel and sand probably caved. 4 pg Pyrite fragments. Some silt and clay fragments laminated. - 240 QQi.1 y;
- g., r..
230 - Cravelly silty SAND, with CLAY tragments. Light-olive-gray. Very-fine-to medium-grained. -250 'm._} o t. l ' S) - } .s 04 4 ~ SAND, with clay and white ash-like fragments. Yellowish-giay. Very-fine 220 - ~ [ to fine-grained. Mostly fine-grained. 5 to 7% mafics. Trace gravel. ~ - 260 -.. a;o - fel i l t- -I Gravelly silty SAND with SILT fragments. Yellowish-gray. Very-fine-to ' [4 medium-grained. 10% mafics. Angular to subangular. 210 - + s.,a, - 270 ~ ,hNi Cravelly sandy SILT to CLAY. Yellowish-gray. Slight waxy luster to clay. my u E l J:*.2
- 11 200 -
1 i Cravelly saady SILT to gravelly silty SAND. Yellowish-gray. Sand very-fine-grained. l -280 .! *(g f*I l Cravelly silty SAND. Yellowish-gray. Very-fine-to fine-grained; i l ] mostly very-fine-grained. 3% mafics. Angular to subangular. l i * \\* ll i } 100 - Silty SAND, with CLAY fra,Junts. Dark yellowish-brswn. Sand as above. a %.i. I - 290 l i
- f..f l
Silty SAND, with silty SA**D to sandy SILT fragments. Yellowish-gray. very-fine-to medium-grained. 2 to 3% mafics. 180- [-I
- - :l l
- 300 I m* ] ~ 7 s Cravelly silty SAND, with CLAY fragments. Sand yellowish-gray. I Clay dark-yellowish-brown. Very-fine-to medium-grained. \\ \\ l PUGET SOUND POWER & LIGHT COMPANY LOG OF DRILL HOLE MJ-1 M RE I SKAGIT I HANFORD NUCLEAR PROJECT 2R-A-112 i t l Amendment 28 l l
S/HNP-PSAR 10/15/82 DRILL HOLE MJ-1 Page.l _ of !L g, [ Depth b c Lhhologic Description Unn .. f *.'. Crave 11y SAND. with dark yellowish-brown CLAY fragments. Yellowish-gray, 170 - ,i Fine-to coarse-grained;mostly medium-grained. 3% mafics. e e - 310 { 61 } k m 9 Gravelly silty SAND, with silty clayey sand fragments. Light-olive-gray. y' Very-fine-to medium-grained; mostly fine-grained. 2 to 3% mafics. d Angular to subangular. r .c f7 160 - A.., k 'i -320 J@W il1 I Sandy clayey SILT. Olive-gray. lIh; m ~ --e-1-u .b Crave 11y clayey SAND. Olive-gray. Medium-to coarse-grained. T s s- - 330 A e 7 48 Crave 11y silty SAND. with SILT and CLAY fragments. Light-olive-gray. --L'@ Very-fine-to coarse-grained. 3% mafics. Local ferruginous stain. I. '7 *1.J L 140 - 1.' l
- t Crave 11y SAND with SILT fragments. Light-olive-gray. Fine-to medium-i *I j f grained; mostly medium-grained. 5% mafics. Local ferruginous stain.
.ie - 340 SAND. Light-alive-gray. Medium-grained. 5 to 7% mtaics. Micaceous. { } ' fi - Trace gravel. 130 -
- /[. '.i y
^ y *.. *3 Sandy CRAVLL. 20% basalt clasts increasing downward to 40 to 45% basalt clasts. Some sandy cement rinds. Blue cast to some basalt clasts. Local - 350 ..q;* * ;. ferruginous stain and cement. ""..*w*k.'. e. '** 41*e 120 - -
- 1 *.*
~ '...a. .so. -360 ....m .*.s* ^ CRAVEL. Trace sand. 30 to 40% basalt clasts. Sandy Blue cast to some basalt clasts. ' cement rinds. 1-b . 2 0..E 110 - - 370 3..... - ,.--.'-a ,h; 100 - Silty sandy CRAVEL. 30 to 40% basalt clasts. Sand very-fine-to medium-j
- i. ':.,1;. -
grained; yellowish-gray. j l 4% i -380 . a-e- - 1 v.. % *.* l .a.. a .>t' l l { } ll*;// Basalt. Dark-gray. Caved gravel clasts. Tem l l FIGURE PUGET SOUND POWER & LIGHT COMPANY LOG OF DRILL HOLE MJ-1 SKAGIT I HANFORD NUCLEAR PROJECT 2R-A-112 Amendment 28
S/HNP-PSAR 10/15/82 DRILL HOLE M-1 Page ft of _1_. l 1 A \\ ( SS sc L thologic Description Unit ['^.*I,~..,BASALT. as above. Some vesicles. 90- - 390
- '.a.'*
T'., I *'* [
- a...
'........, BASALT. Dark-gray. Weathered. Vesicular. Some vesicles filled with 80- - 2a *. , green and white clay. 2.,' *,", -400 .,4 ~ 70-y.... ". 2.<..*. ,,,e - 410 BASALT. Dark-gray. Vesicular. Moderately fresh. Some caved gravel. .a m, * '..., 1 60- '.',. / ". l n
- 6.. *.,.,
-420 BASALT sand. Crayish black. Fresh. Ground to sand size by drill bit. Tem ~ O
- i.,. *, *.
- l.
50- -a i f,* ,',.a,*' - 430 '. ", " '.
- BASALT. Brownish-gray to grayish black. Fresh. Trace vesicles. Local
, *.,,,,. pyrite mineralization at 430 to 435 ft. 2....*. .~ Q:. 40-m BASALT. Dark-gray to grayish black. Fresh. Nonvesicular. - 440 ,*,l' C. ', ' '.. '. <*a'.'. BASALT. Olive-gray to olive-black. Vesicular. Some vesicles filled with ~ '.* [* l green clay. Some brecciated clay fragments. . ~. :. < 30-7-..,*,. l f [ *,,*. *,, BASALT. Dark-gray. Fresh. Nonvesicular. Trace silt from 450 to 460 ft. - 450 ..*a y < l l '. /,.,.* ; a' .',f.',' .,e u,.'.,?,* * * ; 2 0.- 7 .,4, .',a -460 '. =. [,.:. ". *. '. *. .- s' BASALT. Olive-gray. Fresh. Trace silt. Nonvesicular. PUGET SOUND POWER & LIGHT COMPANY LOG OF DRILL HOLE MJ-1 MURE SKAGIT I H ANFORD NUCLEAR PROJECT 2R-A-112 Amendment 28 l
S/HNP-PSAR 10/15/82 l DRILL HOLE MJ-1 Page_Z__ of L_ o 0*"'" d* *\\ Lithologic Description O 'g*h (Depth h Unit feet) og* 10 - n ~.*/, [, BASALT, as above. Local calcite mineralization at 465 to 470 ft. - 470 y..,... .,.... 4 .~.,, 0-
- * ^.
- 7. *. *, ' *,
-480 Tem m - 490 a.***..
- ,$.g m
i... .,9,"C1 f ,,,,.' kBASALT. Olive-gray. Moderately weathered. Vesicular. Vesicles filled / ***** 7 .. *...- lwith yellcwish-green clrf. / - 500 k Sandy clayey SILT to sandy silty CLAY. Light-olive-gray. i ,m w h TI Clayey silty SAT. Light-olive-gray. Local pyrite cement. Very-fine-to 'M ' medium-grained. Angular to subangular. e . t- ~ - 510 7 m SAND. Light-live-gray t yell wish-gray. Fine-to coarse-grained; Ter [ mostly coarse-grained. 3 to 52 mafics. Angular to subangular. -520 7 m - 5 0- ~;: SAND as above. with pinkish-gray to light-greenish-gray CLAY fragments. y a - 530 liy SILT. with CLAY f ragments and SAND. Light-olive-gray; pinkish-gray + A and light-greenish gray. Silt tuffaceous. Clay with waxy luster. s,..,..a ,.,.l, BASALT. Brownish-black. Highly vesicular. Many vesicles filled with ~* clay. Caved sand, silt, and clay f ragments. Tp - 540 T..... o l l PUGET SOUND POWER & LIGHT COMPANY LOG OF DRILL HOLE MJ-1 FIGURE SKAGIT / HANFORD NUCLEAR PROJECT 2R-A-112 Amendment 28
S/HNP-PSAR 10/15/82 DRILL HOLE m-1 Page_fL of _fL. V) ';ts o.pth *p*e#* o\\y.#'k EineHon De Lithologic Description Unit .t> '^ +., *, '., - BASALT. as above. -550 7.. '. * ".'. ' 2,. ', - 560 Tp
- r..;'. -
x L., * * * ' BASALT. Dark-gray. Fresh. Nonvesicular from 560 to 570 ft. Minor e.a.. vesicles at 570 to 573 ft..'**, l '.i.'.'., - 570 7....: -9 6.7- ~~*' - E0H 573' O s J PUGET SOUND POWER & LIGHT COMPANY LOG OF DRILL HOLE MJ-1 FIGURE SKAGli / HANFORD NUCLEAR PROJECT 2R-A-112 Amendment 28 1 i
S/HNP-PSAR 10/15/82 DRILL HOLE m> SAMPLE TYPE Pegel_of__f_ Project No : An-1036 @ Cuttings Elevation : 470.2 ft. 95 Core, Number indicates % Core Recovery [ C2015 0 XPF. With Sample Number g py,ymy i Chemical Results Listed in Table 2R-1 Date Completed : 0 li /" Unit Column Refers to General Stratigraphic Divisions identified Within the Site Area : M - Missouls til - Ringold. Cycie Ill B - Basalt. Undifferentiated EM - Elephant M>untain Member PM - Pre-Missoula II - Ringold. Cycle 11 RR - Rattlesnake Ridge Interbed IV - Ringold. Cycle IV 1 - Ringold. Cycle 1 P - Pomona Member cd* LO NO*' s\\ Elevation Depth Lithologic Description Unit (st.usL) (f eet) gS 470-4 h M.,j Gravelly silty SAND. Medium-light-gray. 75% basalt grains. Coarse-7 :p. to very-coarse-grained. ~_
- dio, j)(tk.f Crave 11y silty SAND to silty sandy GRAVEL. Medium-light-gray. 75%
,27g basalt grains. Coarse-to very-coarse-grained. N ,$ 460-- 10 3 7 1 a Gravelly silty SAND. Medium-light-gray. 75% basalt grains. Medium-to M ~ [e very-coarse grained; mostly medium-grained. ,1
- pp ef 1;
i.a Crave 11y sandy SILT. Medium-gray. Gravel 60% basalt clasts. 7 f eh f q, g 450-- 20 h, 7 }; SAND. Medium-dark-gray. Medium-to very-coarse-grained; mostly coarse- ~ pf
- grained. 70% basalt grains. Trace silt.
~ , - e. _' t 5 fo .p' 440-.- 30 g.j;e Gravelly silty SAND. Moderate yellowish-brown grading downward to yellowish-gray. Moderately well to poorly sorted. 5 to 10% mafics. ], y O } increasing with depth. Micaceous. Angular to subangular. .. q}, o :_ ,p^.4 2 g'Mh 430-- 40 ,,.*e A. .g# ';.,-Q Crave 11y SAND. Yellowish-gray. Very-fine-to fine-grained. 5-7% mafics. Angular to subangular. Gravel 20% basalt clasts. Trace 7 p. silt at 45 to 50 ft. g .g a f i o.. 420--- 50 g,p ] p[. *,',.j e, mafics. Fine-to coarse-grained. Gravel 25 to 30 % basalt clasts. Gravelly silty SAND to silty sandy CRAVEL. Light-olive-gray. 10 to 15% ,e N'd *.! 'i ~j;;,,*t*t Silty sandy CRAVEL. Moderate olive-brown. No cement rinds. Silt ,J' T i." adheres to clasts. Sand fine-to medium-grained. 410- - 60 i f[*[n Crave 11y silty SAND. Dark yellowish-brown. Fine-to medium-grained. 7 ~ }* '.' 15% mafics. Silt adheres to grains. Subangular to subrounded. N @i. PUGET SOUND POWER & LIGHT COMPANY LOG OF DRILL HOLE MJ-2 FIGURE SKAGIT l HANFORD NUCLEAR PROJECT 2R-A-113 Amendment 28
S/HNP-PSAR 10/15/82 DRILL HOLE M-2 Page_2.__ of L E [" Depth c@.1.- Lithologic Description Unit pk Ge' uso (feet) b'j r2 Gravelly silty SAND, as above. Micaceous. Ferruginous stain. Fine- -- 70 's
- to medium-grained; mostly medium-grained. Nc cement rinds on gravel c l a s t ',.
5 . j.I p,y l)[I Silty SAND. Dusky yellow. Very-fine-to medium-grained, mostly medium-grained. S to 7 % mafics. Large muscovite flakes. 1 l j.1 390-- 80 g e I,j i Cravelly silty SAND. Dusky yellow. Very-fine-to medium-grained; mostly ,i e.y very-fine-grained. 2 to 3% mafics. No cement rinds on gravel clasts. Gravelly clayey SILT to gravelly silty CLAY. Yellowish-gray to dusky Arm: :. yellow. Gravel probably caved. ME E 380-- 90 [. Gravelly SILT, with CLAY fragments. Yellowish-gray. Sand very-fine-I ,1 ff P grained.
- id i !l
~~ Jg M SILT, with CLAY fragments. Yellowish-gray to 130 ft.; yellowish-gray 1h[l to dusky yellow from 130 to 140 ft. Trace gravel at 100 to 105 ft. 370--100
- i Clay f ragments decrtase with depth.
4 U -110 360-l 11? ~ lj i 4 350--120 l I m -!Ky i'a U il' l'i i 340--130 h l , I h! f, -~ .h ' UIl[$ 2 lf 330-~140 I, l Il,ll l SILT. Yellowish-gray to dusky ye'Iow. g ,hl { } l PUGET SOUND POWER & LIGHT COMPANY LOG OF DRILL HOLE MJ-2 SKAGIT I HANFOPD NUCLEAR PROJECT 2R-A-113 i Amendment 28 l
S/IINP-PSAR 10/15/82 DRILL HOLE Mi-2 Page_2.off._ m / '\\ tim
- Depth 4< *\\
k Lithologic Description Unit v uso (feet) spt os,,# t u..i-e h}!jl F [ I Trace clav fracmente. Sandy %ILT. Yellowish-gray to dusky yellow. Sand very-fine-erained. 320-~150 l' 1 Siltv SAND to sandy SILT. Duskv vellow. Very-fine-to fine-grained 3 a l 7 [ 2-3% mafics. Angular to subangular. 1 &nb \\ ~ J. '.] .l. 310 --160 Silty SAND. Dusky yellow grading downward to light-olive-brown. Very-fine-to medium-grained; mostly very-fine-to fine-grained. 117 I 3 to 5% mafics. Angular to subangular. li t I 4 e jq. , - 1 300-- 170 . ; 6 ,7 p Sandy SILT to silty SAN *D. Dusky-yellow. Sand very-fine-grained. Clayey in part. $ 9.Y( ..., [p Sandy SILT. Yellowish-gray. Sand very-fine-grained. t flh i 7w i' g'.f ,,o_-180 T i 3,..' Gravelly SAND. Light-olive-gray. Fine-to coarse-grained; mostly fine-to medium-grained. 15 to 20% mafics. Sandy cement rinds on 1-u? e some gravel clasts. Trace silt at 185 to 190 ft. ti s '.f.,',I ' -190 280-Sandy CRAVEL to gravelly SA';D. 45 to 50% basalt clasts. Sandy cement ~J'frM, rinds on some clasts. Sand yellowish-gray; mostly medium-grained; . *l{* *
- 7 to 10% mafics.
Gravelly SAND. Light-olive-gray. Medium-grained. Micaceous. Sandy 1-b? o. cement rinds on some gravel clasts. 270-~ 200
- l 2.***'.
Sand) clayey CRAVEL. Clay light-olive-gray; possibly weathered g '.'.. l.%.. ?. basalt clay. u. .;, y,' ,. ;,a$,*. BASALT. Olive-gray. Weathered and vesicular at 205 to 210 ft. 260 -- 210 f,.'. ~',,. ',, BASALT. Dark gray. Moderately fresh. Vesicular. Some yellowish- ~ green clay in vesicles. J..', :;. Tcm a.p.*. 1 ..;s'e 250 -- 220 !'j ;, ,w,:.**, m A PUGET SOUN'.s POWER & LIGHT COMPANY LOG OF DRILL HOLE MJ-2 FIGURE SKAGIT I HANFORD NUCLEAR PROJECT 2R-A-113 Amendment 28
S/HNP-PSAR 10/15/82 DRILL HOLE MJ-2 p.g.3_ , _c_ I 3.+cyke.#'$ ' 1,;;;P
- o. pin uthowe o..crwon unn
,a v..i> ' l '. s ', ' ~ .. e 240-- 230 BASALT. Medium-dark-gray to 255 ft. Weathered. Vesicular. Some vesicles filled with yellowish-green to white clay. +.. 6 l ::;,*. .s 230--240 2,..aa '* ,.e* w 220-~ 2 60 'l,' ll ~ .a,... ' 6 A ' a,, ,, D. ^,', 'l,' ' BASALT. Dark-gray. Fresh. Minor vesicles to 265 ft. Minor clay f7 (caved?). ~260 210- .': ', l ,*,'..,4 7 w 9 g g g A -,.,g
- ~...
-270 200-BASALT. Dark-gray. Fresh. Nonvesicular. Local pyrite or calcite mineralization on some surfaces. Minor vesicles fron 270 to 280 ft. and from 290 to 300 ft. l 190- ,, j.,. ' -280 ,1'. ', * *,
- I s
s. . f...., 180-- 200 '[',.*.' w A 9.
- 2... '..
....T 170-- 300 t m...,. j - ~.. :..' l l l 1 l PUGET SOUND POWER & LIGHT COMPANY LOG OF DRILL HOLE MJ-2 FI URE SKAGlii HANFORD NUCLEAR PROJECT 2R-A-113 Amendment 28 l
S/liNP-PSAR 10/15/82 DRILL HOLE m-2 p,,t,g n E'l,*"'" Depth s\\ k y, Lithologic Description Unit N, __/ u st) (feet) W g*9
- < -: c 2 *, *, *. " BASALT. Dark-gray. Fresh. Nonvesicular. Local calcite or pyrite on
' * * *, ' some surfaces from 320 to 330 ft. ,,,, y. 160-- 310 ,a,.,
- l.'.'.
X *, '. '. *. *
- ^
, '. ? l ,',a ,.y Tet T.','; ',y 150-- 320 e..v.: ~,,.. * !l ;',' x..... '.* I.* i ' BASALT. Dr.?k - g ra y. Vesicular. Vecicularity increases with depth. 140 --330
- *
- l.*. Vesicles at 335 to 340 filles with green clay.
L ',, e,, ...l l., '. '. *. 7a
- *1
-340 ggw 130 - .E_4, [s N7 Clayey SILT to silty CLAY. Light-alive-gray. \\ Q^ ~ 742& $M 120--350 - flhi,NI I' i SILT to clayey SILT. Crayish-yellow-green. Tuffaceous. ~_ fg'l il o y 'i. Il d Ter -360 6 ;;, 110 - Eht Clayey SILT. with CLAY and tuf f aceous f ragments. Pale olive. l e
- y..h.
ujjii
- isl1 "I
y.l.,, g'il i - 370 100 - ll lli,l;' nl; l ': l hl .g'i! f, l -380 ,o_ ll q j %.l,,#, PUGET SOUND POWER & LIGHT COMPANY LOG OF DRILL HOLE MJ-2 RGURE SKAGIT l HANFORD NUCLEAR PROJECT 2R-A-113 Amendment 28
S/HNP-PSAR 10/15/82 DRILL HOLE "J - 2 PageJL_ of 1_ f" g,epth p, *, gc D k Lithologic Description Unit .,) u-h Clayey SILT as above. Pale-olive to grayish-olive. Vesicular 7~ ! basalt clasts in sample at 395 to 400 ft. 80--390 Ter i i 1, 2 ,l s. Q - 400 70-L . f, *, ** BASALT. Dark-gray. Moderately fresh. Vesicular. Some vesicles i..'., filled with green clay. Caved material from Rattlesncke Ridge interbed from 405 to 420 ft. Basalt extremely vesicular from 415 - 410 to 420 ft. 60-Tp j J. *.'. : 50--420 i { j i i 45.2-- E0H 425' i l I I 1 l FIGURE 1 PUGET SOUN3 POWER & LIGHT COMPANY LOC. OF DRILL HOLE MJ-2 SKAGIT I H ANFORD NUCLEAR PROJECT 2R-A-113 Amendment 28
S/HNP-PSAR 10/15/82 DRILL HOLE "J-3 SAMPLE TYPE Page l_ of L 823-1036 Project No : . Cuttings Elevation : 468.5 ft. g5 E Core, Number Indicates % Core Recovery 8' h8.18;E262.629.38 C2015 O XRF, With Sample Number 41 ) Coordinates : Chemical Results Listed in Table 2R-1 v Date Completed : 8/26/82 Unit Column Refers to General Stratigraphic Divisions identified Within the Site Area : B - Basalt,Undif ferentiated M - Missoula 111 - Ringold. Cycle 111 EM - Elephant Mountain Member PM - Pre-Missoula 11 - Ringold. Cycle il RR - Rattlesnake Ridge Interbed IV - Ringold. Cycle IV I - Ringold. Cycle i P - Pomona Member h*h gM* k0 Lithologic Description Unit Elevation Depth (s t.u s L) (feet) ge
- j'$.h' Silty sandy GRAVEL to gravelly silty SAND. 50 to 55% basalt clasts. Snd 571 yellowish-gray; very-fine-grained; angular to subangular.
' ' o s[8 Gravelly SAND. 75% basalt grains. Very-coarse-grained. Angular to subangular. x s-e e -10 y 6 m ;h .n
- i".
Silty sandy CRAVEL to gravelly silty SAW. 50 to 75% basalt clasts. },.4*i.7 ...r. Sand poorly sorted; very-fine-to very-coarse-grained; 45 to 60% basalt ~J.-M I H grains; angular to subangular. Nk 450 - d@,y - 20 5 1 v) - {.1:k.r t ...e . a. o' w of..c crave 11y silty SAND. Yellowish-gray to dusky yellow. Very-fine-440 - grained. <1% mafics. Angular to subangular. Gravel (45% basalt - 30 o.0;.[ clasts. ]- }f p..} M i :k.'... !)... O ' pl.f t Silty sandy CRAVEL to gravelly silty SAND. 20-25% basalt clasts. 430-1 N cement rinds. Sand moderately to poorly sorted; 5-7% mafics; PM 4 - 40
- f #)h subangular to subrounded ; yellowish-gray to dusky yellow.
T It 'd, t 4 y, I .b
- '1 Crave 11y silty SAW. Yellowish-gray to dusky yellow.
7-10% mafics. q plQj { Very-fine to medium-grained. Angular to subrounded. Gravel 25% basalt clasts; no cement rinds. 420 - - 50 - -r-- . i.- ~ 2'i.1- " J,l J,* Silty sandy GRAVEL. <50% basalt clasts. No cement rinds. Matrix
- q..,,'*.[
light-olive-grsy to moderate-olive-brown. Clay at 55 to 60 ft; g l _,. g..,, g possibly weathered basalt clay. y 4 to- ~ ;*J.T., - 60 5, * * 'l BASALT. Oive-gray. Weathered. Nonvesicular. Tem s PUGET SOUND POWER & LIGHT COMPANY FIGURE LOG OF DRILL HOLE MJ-3 SKAGIT / HANFORD NUCLEAR PROJECT 2R-A-114 Amendment 28 .'O.
S/ HBP-PSAR 10/15/82 DRILL HOLE C-3 Page_.l 0f 4._ I 09 El ;lllp Depth gd *g6g 9 LithologlC Description Unit Mst) (feet) pM ot 400-BASALT. Olive-gray. Weathered. Silt and clay at 70 to 75 ft. - 70 - 4,'.,,,
- a E.,
. 4 W ],. P. ', *, ' BASALT. Medium-dark-gray at 75 to 80 ft. Dark-gre> from 80 to 135 ft. 390-Fresh, vesicular to 135 ft. Some vesicles fi' led with yellowish-green or - 80 white clay. y , D,,
- P O *
.D g .,.,.9, I = g i '8 [ 38O- - 90 r,,.',' ~.- >.E 9.. A D. 6 9 370-a -100 Tem 7 T g l l ,3 ~ 9 g - T.O e g 4 g u, f f g 360- .a - 110 4... # d N P 9* O w'. 9 O, g W ,a 3 a.F g P,O 9f..
- . ~, '.
350- -120 l 1
- , *.< l,
1 340- ^ - 130 ,..c .c 3 D *4 . P. ... a. ,e..a,. v.:.... 330-BASALT. Dark-gray. Fresh. Konvesicular. Calcite on f racture surf ace at
- e. '..
-140 140 to 145 ft. ri...., ~ l l FIGURE PUGET SOUND POWER & LIGHT COMPANY LOG OF DRILL HOLE MJ-3 SKAGIT 1 HANFORD NUCLEAR PROJECT 2R-A-114 Amendment 28
S/HNP-PSAR 10/15/82 DRILL HOLE M-3 Page 3_ of _L \\ )
- f" Depth e
sc Lithologic Description Unit \\ 5, 320- ~~, *,., * ' BASALT. Dark-gray. Fresh. Nonvesicular. Calcite on fracture surface 7
- ., '. *. '.at 170 to 175 f t.
-150 '. * * *, ' l -.{:;' 310- ,.'.,.,f, - 160 . y *,. Tem y c.. ;(, -2.~..,; 300- -170
- /,"'.'.'*
200-- ~?.~.'.*~. BASALT. Mediurn-dark-gray f rom 175 to 185 f t. Fresh. Minor vesicules ~ at 180 to 185 ft. -180 [.,** ' l
- g
( v' w.ts ;.. WnM Q7d Clayey SILT to silty CLAY. Light-olive-gray. Caved vesicular basalt 280-4.*- clasts. - 190 , 2 *. :r~**. : " F T. ~ C+y
- ,1; T !
yl$h Clayey SILT. Light-olive-gray. Tuffaceous. [ 270- -200 e [p M. Clayey SILT to silty CLAY. Light-olive-gray. Tuffaccous. Ter .w. ~ .a IT$$ ~h.+ Silty CLAY to clayey SILT. Grayish-yellcw-green. Tuffaceous. 260-NI
- h*:t. :
-210 g AD Sandy clayey SILT to sandy silty CLAY. Grayish-yellow-green. iE,Q] Tuffaceous. Wh 2n:f+E Sandy silty CLAY to sandy clayey SILT. Crayish-yellow-green. -2h7::22 Tuffaceous. 250-og' -220 ~,, iu4 a e, { Sandy clayey SILT. Crayish-yellow-green. Tuffaceous. Sand very-fine-grained. !.DpD" ' G .a a FIGURE PUGET SOUND POWER & LIGHT COMPANY LOG OF DRILL HOLE MJ-3 SKAGli / HANFORD NUCLEAR PROJECY 2R-A-114 Amendment 28
S/HNP-PSAR 10/15/82 DRILL HOLE RI-3 Pagel.of _!t_. n [ 'l O*"*" Depth 0 k Lithologic Description Unit s f (f ee t-ca V Weg (feet) ot,9 '[ I Sandy clayey SILT, as above. Ter i 240 - q g'!, i '..l - 230 ,.i,', 2 s- ,,, ', "*l BASALT. Medium-gray grading downward to medium-dark-gray. Moderately
- *l.*,' fresh. Vesicular. Some veelcles filled with green or white clay.
230- - 240 w, ,r. ~ a - 220-y -250 1 ',* *
- BASALT. Dark-gray from 245 to 260 ft. fresh. Vesicles decreasing.
7,, *. e. Calcite crystals at 250 to 255 ft. d '. ', * *. '. ' Tp 8 a 6 .,*.a s,, ', *. 210-
- 'e, *, '
- 260 ~,.... i,,..,,2 (O. g BASALT. Crayish-black from 260 to 270 ft. Fresh. Large vesicles at U
- ,.,e 265 to 270 ft. Increase in size of plagioclase phenocrysts at 260 to T. ' ' *, *,
265 ft. 200 - - 270 195.5-E0H 273' l l l l ~ PUGET SOUND POWER & LIGHT COMPANY LOG OF DRILL HOLE MJ-3 FIGURE SKAG!T I HANFORD NUCLEAR PROJECT 2R-A-114 l Amendment 28 l
e e ...-wwp- ~ O I DOCUMENT PAGE .~ PU _ LED e ANO.smar NO. OF PAGES REASON O PAGE lufGS2 D +wnD core mD A1. ran er ov e 3 3 D DEllER cop (REQUESTED ON -_ g' eAstioomotionou h ) COP (MDAlPOR OTHER ALMtD ON APERTORE CARD NOhhu% h m es w - g x
S/HNP-PSAR 10/15/82 \\ \\s / QUESTION 231.5 (Regulatory Staff Position): Additional investigations may be required of the Appli-cant to confirm the presence or absence of potentially hazardous geologic structure which may have been identi-fled through existing data utilized in the response to RAI 231.4 but which lacks sufficient resolution for determination of capability or noncapability.
RESPONSE
Subsequent to the Applicant's response to Question 231.4 and a meeting with the NRC staff on July 8 and 9, 1982, the staff determined that some additional investigations were required in one area for which there was not, in their judgment, sufficient information to confirm the presence or absence of hazardous geologic structure. Their request for additional information was forwarded to the Applicant in the form of Question 231.14. The Appli-cant's response to this request for additional informa-tion is provided in Amendment 28 to the PSAR. O O O231.5-1 Amendment 28
S/HNP-PSAR 10/15/82 f QUESTION 231.14 The Applicant will conduct a core boring program of sufficient scope to determine if the May Junction mono-i cline is fault controlled. If fault controlled, this program should provide sufficient new subsurface evidence demonstrating that the fault is not capable. This may include other subsurface techniques and information to supplement the core borings. This program should be of sufficient scope to define the attitude, sense of move-ment and age of last movement of the fault and be designed to carefully recover and define the overlying formations in this area. 1
RESPONSE
In response to this question, the Applicant undertook a program of exploration using gravity measurements and rotary-wash borings. This program developed sufficient evidence to demonstrate that the May Junction monocline i I is not fault controlled. Thus, core borings were not required. Definition of May Junction Monocline The May Junction monocline is defined by the 2000-foot wide, north-south gravity gradient extending 2.5 miles through Sections 28, 29, 32 and 33 of T13N, R27E, and 3 Sections 4 and 5 of T12N, R27E (S/HNP PSAR, Appendix 2K, Figure 2K-15). It was first recognized on the basis of aeromagnetic data (Myers and Price,1979) and termed the May Junction linear (Magnetic Features Map, RHO-BWI-ST-4, Plate lll-6d). Investigations for the S/HNP PSAR, including gravity surveys and drilling, showed that the aeromagnetic linear was produced by a gentle easterly slope on the buried bedrock surface. On the basis of this bedrock structure, indicated both by gravity surveys and drilling, the feature was interpreted to be a gentle monoclinal fold and termed the May Junction monocline. Exploratory Program i In a meeting with the NRC staff and representatives of 1 i the USGS on July 21, 1982, a program of investigations to i address Question 231.14 was proposed by the Applicant. The program contemplated three steps. First, a gravity survey would be performed to characterize the May Junc-tion monocline in greater detail so that locations for rotary-wash borings could be selected. Next, rotary-wash Q231.14-1 Amendment 28 L..-...--------.---------.-
S/HNP-PSAR 10/15/82 QUESTION 231.14 (Cont'd) borings would be drilled to evaluate the bed rock struc-ture. And, finally, core borings would be drilled to determine the characteristics of any faults that might be discovered. The NRC staff agreed that the program was responsive to their request for additional information (NRC Letter, Novak to Myers dated August 4,1982) and the program was implemented. New gravity stations were established in Sections 32 and 33 of T13N, R27E, approximately 1 mile south of Gable Mountain (Figure 231.14-1), along nine new traverse lines (8A-8H, 8J) and portions of Lines 8 and D at 100-foot station intervals. All gravity stations were surveyed and both vertical and horizontal control provided to the nearest 0.1 foot. The newly acquired data were evaluated in profile. They were also combined with the NESCO data set (S/HNP PSAR, Appendix 2K) to produce a total Bouguer gravity anomaly map (Figure 231.14-2). The gravity anomaly contours on the May Junction monocline are consis-tent with a north-south trending bedrock surface sloping gently and uniformly downward toward the east. Line 8C was chosen as a drilling location because of the typical character of the gravity profile (Figure 231.14-3) and the anticipation of a thick section of Ringold. Three rotary-wash boring locations, spaced equi-distantly across the steepest part of the gravity anomaly, were selected and discussed with the NRC and USGS staffs. The rotary method of drilling was used because the most important contacts in the section for determining the bedrock structure are the basalt / sediment contacts, which are easily recognized from data generated by this drill-ing technique. The elevations of these contacts were determined from detailed examination of the lithologic characteristics of the drill cuttings (Figures 231.14-4A, B and C) combined with interpretation of four down-hole geophysical logs for each hole (Figures 231.14-5A, B, C and D). The elevations of these contacts, particularly the Ringold Formation / Elephant Mountain member contact, the Elephant Mountain member / Rattlesnake Ridge interbed contact and the Rattlesnake Ridge interbed/Pomona member contact, were used to determine the thickness and dip of the various units along the line of section. Table 231.14-1 shows the thickness of the several units encoun-tered in the three holes. Figure 231.14-6 shows the correlation between stratigraphic units recognized in borehole MJ-l on Line 8C and holes drilled on Line 8 to Q231.14-2 Amendment 28
S/HMP-PSAR 10/15/82 i \\ QUESTION 231.14 (Cont'd) the north and Line 3 to the south, thus demonstrating the continuity of stratigraphic units along the strike of the monocline. Figure 231.14-7 shows the geologic cross section across the monocline at Line 8C. Results: The above investigation has shown the following: 1. Gravity anomaly and top-of-basalt contourn are consistent with those drawn from earlier data and portray a gentle (70 to 100) continuous slope without abrupt irregularity. 2. Borehole intercepts of the top-of-basalt lie along a nearly straight line. 3. The Elephant Mountain basalt / Rattlesnake inter-bed /Pomona basalt contacts are nearly parallel and define unit thicknesses that vary slightly but which are well within the range of normal thick-ness for these units throughout the Hanford g Reservation. \\_ 4. The entire Ringold section is present in the most l downslope boring (MJ-1) and correlates well with other borings along strike. Interpretation of Results There are four lines of evidence which indicate that the May Junction monocline is not fault controlled. These are: o the smooth surface of the basalt as defined by drilling and gravity (Figures 231.14-7 and 231.14-8), 0 o the shallow (70 to 10 ) dip of the stratigraphic units which form the monocline, o the uniform dip ( 30) of the stratigraphic units between the drill holes and o the generally uniform and typical thicknesses of the Elephant Mountain member encountered along the line of section. O Q231.14-3 Amendment 28
S/HNP-PSAR 10/15/82 QUESTION 231.14 (Cont'd) The shallow dip of the units across the strike of the monocline had been recognized from previous geologic and geophysical studies (S/HNP PSAR, Appendices 2R and 2K). Results of the present investigation have confirmed this observation and have specifically shown that the units do, in fact, have a shallow dip (70 to 100) along Line 8C (Figure 231.14-2). The units for which this shallow dip has been confirmed along Line 8C include Ringold Unit I, Elephant Mountain member, Rattlesnake Ridge interbed and the Pomona member. The shallow dip of these units indi-cates that, although the monocline is a prominent geophys-ical feature, only minor deformation has taken place in the basalt or overlying sediments along the trend of the monocline. This minor deformation has clearly been accommodated by the warping which produced the monocline. In addition to the very gentle dip of the sediments and basalt units across the monocline, the fact that the dip of the units remains nearly constant between the drill holes indicates an absence of fault control. If the feature were fault controlled, and some offset of the basalt and overlying sedimentary units had occurred, such an offset would be reflected by variations in dip across the feature. Since there are no significant (>50) variations in dip and contacts across the feature lie along nearly straight line projections, there can be no significant fault offset between the drill holes. There is certainly no offset of the type that might be asso-ciated with a fault presumed to have caused nearly 300 feet of relief on the bedrock surface over a distance of only 2.5 miles. Table 231.14-1 shows the elevations of contacts and thicknesses of units encountered in the three rotary holes. The Elephant Mountain member, in particular, is shown to have a very uniform thickness along the line of l section. Some thickening is observed in MJ-2 in the Rattlesnake Ridge interbed; however, it is well within the normal range of variability in thickness of this unit observed elsewhere in the Pasco Basin where faults are known to be absent. None of the units show changes in thicknees which could be interpreted to result from thinning or thickening due to displacement on a fault. l Upon completion of the rotary drilling program, a model of the subsurface geology that satisfies both the results of drilling and the gravity along Line 8C was constructed (Figure 231.14-8). The densities used for the units are 2.60, g/cm3 for the basalt, 2.45 g/cm3 for the Ringold 0231.14-4 Amendment 28
S/HNP-PSAR 10/15/82 [G \\ QUESTION 231.14 (Cont'd) Basal Unit I gravel, and 2.0 g/cm3 for the Rattlesnake Ridge interbed and the remainder of the sedimentary section. The modelled basalt surface varies smoothly. The change of Bouguer gravity anomaly across the May Junction monocline is due to the change of elevation of the top of basalt, change of density in the Ringold section and variation of the regional Bouguer gravity anomaly. The change in elevation of top of basalt accounts for at least 90% of the change. No evidence for offset is present. Conclusions Based upon all the available data, the following conclu-sions are drawn: 1. The May Junction monocline is a broad, gently-sloping fold in the basalt /interbed sequence; 2. No evidence of irregularities in the basalt surface or in subjacent or suprajacent units has been found to suggest fault offset; l l 3. Cumulative evidence indicates an absence of l evidence for faulting or " fault control." Based on these investigations and the other data avail-able, investigations on the May Junction monocline have been adequate to provide reasonable assurance that the feature is not fault controlled. No further investiga-tive work is needed to confirm this conclusion. OG O231.14-5 Amendment 28 1
S/HNP-PSAR 10/15/82 TABLE 231.14-1 Sheet 1 of 2 ELEVATIONS OF CONTACTS AND THICKNESSES OF UNITS ENCOUNTERED IN DRILLHOLES ALONG LINE 8C MJ-3 MJ-2 MJ-l Top IV Depth NP NP 124 Elevation NP NP 352 Thickness IV 0 0 82 Top III Depth NP NP 206 Elevation NP NP 270 Thickness III O 0 36 Top II Depth NP 85 242 Elevation NP 385 234 Thickness II 0 95 66 Top I-u Depth NP 180 308 Elevation NP 290 168 Thickness I-u 0 10 33.5 Top I-b Depth NP 190 341.5 Elevation NP 280 135 Thickness I-b 0 14.5 39.5 Top Tem Depth 55 204.5 381 Elevation 413.5 266 95 Thickness Tem 127.5 127 113.5 Top Ter Depth 182.5 331.5 494.5 Elevation 286 139 -18 Thickness Ter 46 65.5 35 Amendment 28
S/HNP-PSAR 10/15/82 TABLE 231.14-1 Sheet 2 of 2 MJ-3 MJ-2 MJ-l Top Tp Depth 228.5 397 529.5 Elevation 240 73 -53 Thickness Tp NP = Not Present I-b = Ringold Basal Unit I IV = Ringold Unit IV Tem = Elephant Mountain Member III = Ringold Unit III Ter = Rattlesnake Ridge Interbed II = Ringold Unit II Tp = Pomona Member I-u = Ringold Upper Unit I l Amendment 28
S/HNP-PSAR 10/15/82 R.2 7 E. bi 29 l' b 28 27 I I l Ni N' ,'e e s I 3 j vs 7 n / x x \\g4 / sA\\ \\ \\ /4A i 5 ! \\ Xu e \\u\\ e i Nes A / s4A is V SN \\' \\' Y A z'&l l 9 gg e n x g / \\/ 31i y ,r v e w fx A 34 l M M / X/ Y L 80 / h /\\/ \\ h 22 i\\ SC /5!-3/#J-y A /\\ l5 yl \\ 4 \\/88 '/ /Gh1/ V / ~ I 8_/ \\ / / ', s ' / ^ \\ 'T.13N} [ 8A K / l ~ T.12 N. 5 3 l 0 2000r7 73 l g SKAGI HANFORD NUCLEAR PROJ C PRELIMINARY SAFETY ANALYSIS REPORT LOC ATION MAP FIGURE 231.14-1 Amendment 28
S/HNP-PSAR 10/15/82 E I a' s i, # @IMMoM [S ea ( ~3'- \\ \\( % ex M / %$ N 8 M N M c. \\\\\\#sw 'T '"/ r/RffL NR\\\\\\\\ 1 / ' ////////////di i 1 \\ \\ \\ *- 6 1 80 /o er (n ~ flilit"lill' ' i I e' h\\ \\ ) bt er \\\\ a\\\\\\\\ 'I?D / J C Y tts I/ k\\\\\\ \\\\\\\\ \\ \\ \\ B <eA ( xm mxxxxxxxT r 70,% !Wa%blu \\ Contour interval: 0.1mgal l Data reduced at 2.00g/cm3 @ Drill hole location Gli HAN O D NUC AR PROJECT PRELIMINARY SAFETY ANALYSIS REPORT TOTAL BOUGER GRAVITY I ANOMALY MAP j { } MAY JUNCTION AREA FIGURE 231.14-2 Amendment 28
i \\ I O O M I O O MJ-3 -e ~'%
- +,+
8 MJ-2 an. I cn M J-1 _J I <O 00 E$n. I O O M. l l l O O O+ l'.00 20.00 30 00 40.0 '0.00 O HORIZ DISTANCE IN i i l I l i
S/HNP-PSAR 10/15/82 t i 5'0.00*1 0* 6'0.00 7'.00 8'0.00 0 FEET l l PUGET SOUND POWER & LIGHT COMPANY SKAGIT / HANFORD NUCLEAR PROJECT PRELIMINARY SAFETY ANALYSIS REPORT GRAVITY PROFILE l OF LINE 8C l FIGUHE 231.14-3 Amendment 28
S/HNP-PSAR 10/15/82 DRILL HOLE M3-1 AMPLE TYPE Page 1_ of _.8__ Project No : 823-1036 Elevation : 476.3 ft. 95 Core, Number indicates % Core Recovery 5717ft. Total Depth : C 2015 @ XRF, With Sample Number Coordinates : N4 51 444. n. r?64. 611. 33 Date Completed : 9/15/82 Chemical Results Listed in Table 2R-1 Unit Column Refers to General Stratigraphic Divisions identified Within the Site Area : M - M;ssoula Ill - Ringold. Cycle l11 B - Basalt, Undifferentiated EM - Elephant Mountain Member PM - Pre-Missoula II - Ringold. Cycle II RR - Rattlesnake Ridge interbed IV - Ringold. Cycle IV I - Ringold. Cycle i P - Pomona Member M* b Lithologic Description Unit h*4 Elevation Depth (f t.MSL) (f eet) e [f 8 9 Gravelly silty FAND. Light-olive-brown. Medium-to very-coarse-grained. 4 N 4m-;.. 470 - ,. {*' y ^ *]y Crave 11y silty SAND. Olive-gray. Very-fine-to very-coarse grained. i fining with depth. 60 to 75% basalt grains. Angular to subrounded. - 10 F cp ] e..., g ' y ; l' .t 460--
- e; g
e ::af' - 20 E. F Cr$<*117 Silty SAND. Medium-dark-gray grading to medium-gray at 30 to ] .of 35 f t. 55 to 80% basalt grains, decreasing with depth. Very-fine-to a very-coarse-grained. Angular to subrounded. Gravel 75% basalt clasts. 450 - , {, s ,( --30 [ y 8j 440 - 'l Silty CRAVEL to gravelly SILT. Light-olive-gray. Ferruginous stain. q Gravel basaltic; possibly caved. y&, e no ~ y Crave 11y Sli.T to silty CRAVEL light-olive-gray. U& ~ b,{ f 4 Crave 11y sandy SILT to silty sandy CRAVEL. Light-olive-gray. Spotty 430 - ferruginous stain, band very-fine-and medium-to coarse-grained. Md - 50 PM .k[. /) Silty sandy CRAVEL. 30 to 50% basalt clasts, decreasing with depth. ,( p Sand very-fine-to very-coarse-grained; inostly coarse-to very-coarse )f'$ & grained; 20% basalt grains. 420 - 'k).' *. .v. - 60 ~ ,'1 Gravelly SAND. Yellowish-gray. Fine-to medium-grained. 10% mafics. r, d [
- o Angular to subangular. Trace silt.
v PUGET SOUND POWER & LIGHT COMPANY FIGURE LOG OF DRILL HOLE MJ-1 SKAGIT I HANFORD NUCLEAR PROJECT 2 31.14 -4 A Amendment 28
S/HNP-PSAR 10/15/82 DRILL HOLE m-1 Page.2._ of.fL_ . ' " Depth so Lithologic Description Unit ',}N '. Sandy CRAVEL. 20% basalt clasts. Sa nc' fine-to coarse-grained; 10 to 15% 410-7 mafics; angular. Trace silt. .s. - 70 f f.[o Gravelly silty SAND. fellowish-gray to light-olive-gray. 20 to 25% i mafics. Very-fine-to cearse-grained. Angular to subangular. W t' 400- .k Cravelly SAND to sandy CRAVEL. Yellowish-gray to light-olive-gray. Fine-Z 6 to very-coarse-grained; mostly very-coarse-grained. 30% basalt grains. - 80 . ;it
- 7, [ t Gravelly silty SAND. Yellowish-gray to light-olive-gray. Very-fine-to i
= very-coarse-grained. Crain size decreases and sorting is poorer with deptl. jo'[j 25 to 30% basalt grains. Silt increases with depth. 300- .f t r ~ e: et i 1 .1 - 90 ~ [ Silty sandy CRAVEL to gravelly silty SAND. 45% basalt clasts. Sand as PM above. 380-
- Ib*
Crave 11y silty SAND. Yellowish-gray to light-olive-gray. Very-fine-to - d e medium-grained; mostly medium-grained. 15 to 20% mafics. Lccal ferru- . h l'f c ginous stain. -100 ~ Silty sandy GRAVEL. Matrix as above. Local ferruginous stain. No sandy 7 l l cement rinds. W*./, 370- ,e,, Gravelly silty SAND to silty sandy CRAVEL. Yellowish-gray. Very-fine-N e. W to coarse-grained. 10 to 15% mafics. No sandy cement rinds. a -110 m' * *.:*.;.
- -s*,'
Gravelly SAND to sandy CRAVEL. Yellowish-gray. Fine-to medium-grained. 7[J*h) 7 to 10% mafics. Angular to subangular. Clean. Gravel 15% basalt ' e '*
- clasts; no sandy cement rinds.
,3. /.' ' 360-r-A L. '..*. s" c,, ;- v +. - - 120 syC.. Sandy CRAVEL to gravelly SAND. Sand as above. Some pebbles with yellow .f;gjyy' sandy cement rinds (reworked Ringold?). i 7Q,'t.. Z
- e. ?y:.Q 350-j:6Mk o,p y.-
'.;.g",. ' -130 [ *
- Cravelly SAND. Yellowish-gray to dusky yellow. Fine-to medium-grained;
,c,:s mostly medium-grained. 7-10% mafics. Angular to subangular. Abundant ( gravel clasts with yellow sandy cement rinds. IV 340- ,-
- g-E, p'.;
-140
- ? *18
. * ),,. r *W. l l
- oi, FIGURE PUGET SOUND POWER & LIGHT COMPANY LOG OF DRILL HOLE MJ-1 SKAGIT I HANFORD NUCLEAR PROJECT rsi.14-44 Amendment 28
S/HNP-PSAR 10/15/82 DRILL HOLE "3-1 Page_1_. of _fi_. E {'f,'" (Depth 54
- \\
Lithologic Description Unit 05'9,sc 9 feet) M ust) 330-fl M.vh. ,, gf.*
- Silty sandy CRAVEL. Matrix yellowish-gray to dusky yellow. Sand fine-to
-150 y* *;aJJ medium-grained; mostly medium-grained; 5 to 7% mafics; angular to sub-f.l angular. Yellow sandy cement rinds on gravel clasts. ,..* ', k f) a Ml;.:._. - 320-i e ', Crave 11y SAND. Yellowish-gray grading downward to dusky yellow. Very- -160
- L
~ fine-to medium-grained; mostly medium-grained. 5 to 7% mafics. Angular to subangular. Abundant yellow sandy cement rinds. e i.'s
- q s 310 -
I. (. Silty SAND. Yellowish-gray to dusky yellow. Very-fine to medium-grained; a ' mostly fine-to medium-grained. 5 to 7% mafics. Trace gravel. 7g. i -170 Silty SAND to sandy SILT. Dusky yellow. Very-fine-grained. 300-e ~180 " 4 SAND. Yellowish-gray. Fine-to medium-grained; mostly medium-grained. 7 to 10% mafics. Angular to subangular. Trace silt from 180 to 190 ft. 200-Micaceous at 185 to 190 f t. and 195 to 200 ft. Trace gravel with yellow - L '[ sandy cement rind at 195 to 200 ft. -190 'd h 280-x a - 200 l -,('hb. Sandy GRAVEL to gravelly SAND. Yellowish-gray to dusky yea, Abundant Nyf.[yl yellow sandy cement rinds. .*s. 270-l {,. 'l Gravnlly SAND. Dusky yellow. Local ferruginous stain and cement. 0(,. l - 210 I.e Gravelly SAND. Light-olive-gray. Fine-to medium-grained; mostly e medium-grained. 15 to 20% mafics. Wood fragments. Micaceous. Sandy A g.* cement rinds. l 260-SAND. Light-olive-gray. Very-fine-to medium-grained; mostly medium-gg grained. 20% mafics. Micaceous. -220 ---r- ~ 7'.. ',.
- CRAVEL. Trace sand.
15 to 20% basalt slasts. Trace sandy cement rinds. I l l .C.. * : PUGET SOUND POWER & LIGHT COMPANY LOG OF DRILL HOLE MJ-1 SKAGIT / HANFORD NUCLEAR PROJECT 2 31.14 - 4 A 1 l Amendment 28
S/HNP-PSAR 10/15/82 DRILL HOLE M3-1 Page_I._of_8_ 0 * '" Depth ge Lithologic Description Unit .=. ,'.*,*.*,'.,'a 250 - CRAVEL, as above. Pyrite on some clasts. 4, - 230 M .
- f.*.
- Sandy CRAVEL. 35% basalt clasts. Local pyrite. Minor yellow sandy 1 ;'. *,= '.3,
cement rinds. Sand matrix fine-to medium-grained. m .. M Z 240 - Gravelly sandy SILT, with CLAY and ash-like fragments. Very-light-gray. ] p [TJ olive-gray, and light-olive-gray. Gravel and sand probably caved. Pyrite fragments. Some silt and clay fragments laminated. i - 240 j. g.g; _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ '{?hk [...[ Crave 11y silty SAND, with CLAY fragments. Light-olive-gray. Very-fine-230-p; to medium-grained. w h' 4 'g ' -250 eq y 13 '- ye CLr 220 - T.2.T.'. SAND with clay and white ash-like fragu nts. Yellowish-gray. Very-fine 7~ '1 -+ to fine-grained. Mostly fine-grained. S to 7% mafics. Trace gravel. ,, j. " - 260 o; -sj4' l 1 ~.sf ' p 2 Gravelly silty SAND with Si T fragments. Yellowish-gray. Very-fine-to cedium-grained. 10% mafics. Angular to subangular. 210-6, .0I
- y'.
- s :?
+ .',].... - 270 [hd Gravelly sandy SILT to CLAY. Yellowish-gray. Slight waxy luster to clay. =se ~ y8,;;*JJ 4 11 200-- Gravelly sandy SILT to gravelly silty SAND. Yellowish-gray. Sand { qh very-fine-grained.
- S U
-280 }*h.l8N Crave 11y silty SAND. Yellowish-gray. Very-fine-to fine-grained; is mostly very-fine-grained. 3% mafics. Angular to subangular. ]
- i. (;.0 l
190 - Silty SAND. with CLAY fragments. Dark yellowish-brown. Sand as above. M'.[: N - 200
- -[. '
- l.i Silty SAND, with silty SAND to sandy SILT fragments. Yellowish-gray. s Very-fine-to medium grained. 2 to 3% mafics. 180-4
- . l '.
- 300 .i.4 w] Crave 11y silty SAND with CLAY fragments. Sand yellowish-gray. i Clay dark-yellowish-brown. Very-fine-to medium-grained. FIGURE PUGET SOUND POWER & LIGHT COMPANY LOG OF DRILL HOLE MJ-1 SKAGIT I H ANFORD NUCLEAR PROJECT 2 31.14-4 A Amendment 28
S/HNP-PSAR 10/15/82 DRILL HOLE MJ-l Page_5__ of _E_ h*" (Depth c#
- \\
Lithologic Description Unit feet) M t ot Met) @;f Gravelly SAND, with dark yellowish-brown CLAY fragments. Yellowish-gray. 170 - eMi Fine-to coarse-grained;mostly medium-grained. 3% mafics. i ip p.s____-_________--_____s. - 310 [et,.} 1 :., -1 ws Crave 11y silty SAND. with silty clayey sand fragments. Light-olive-gray. p*, Very-fine-to medium-grained; mostly fine-grained. 2 to 3% mafics. T -. "'*t Angular to subangular. 160 - ~ JL' T 7 4+ d,i a 7 t - 320 a._,.w., -ll, '.lg Sandy clayey SILT. Olive-gray. u n~I*II' d ~ -~n-1-u ] h[ Gravelly clayey SAND. Olive-gray. Medium-to coarse-grained. ,A - 330 A e-1 :e. Gravelly silty SAND, with SILT and CLAY fragments. Light-alive-gray. 1 4 7 Very-fine-to coarse-grained. 3% mafics. Local ferruginous stain.
- e. w 7 h*L 140 -
l.Q *l Gravelly SAND, with SILT fragments. Light-olive-gray. Fine-to medium- ,l j g.. y grained; mostly medium-grair.ed. 5% mafics. Local ferruginous stain. - 340 T ~ SAND. Light-olive-gray. Medium-grained. 5 to 7% mfaics. Micaceous. I ' l.o1 Trace gravel. 130 - './ -:? ^ '.*.*f,** Sandy GRAVEL. 20% basalt clasts increasing downward to 40 to 45% basalt - 350 ..l # clasts. Some sandy cement rinds. Blue cast to some basalt clasts. Local ferruginous stain and cement. . d: 3 cm..~;;; ?. e = ~ W 120 - 2 ... =. -360
- "..*.*.o, l
...a CRAVEL. Trace sand. 30 to 40% basalt clasts. Sandy cement rinds. ^
- 'I.',
Blue cast to some basalt clasts. 1-b . E N..".- 110 - ,a,... - 370 &:.y.. : '.'s..S. W l 100 - j[.;.?[j"f Silty sandy CRAvFL. 30 to 40% basalt clasts. Sand very-fine-to medium-
- 2. 'f,. 1,*. ;
grained; yellowish-gray. .r e.:.:m -380 o..,.... l h ll *;,.'l Basalt. Dark-gray. Caved gravel clasts. Tem Fi URE PUGET SOUND POWER & LIGHT COMPANY LOG OF DRILL HOLE MJ-1 SKAGIT I H ANFORD NUCLEAR PROJECT e s t.14 - 4 A Amendment 28
S/HNP-PSAR 10/15/82 DRILL HOLE M.' Page__ft of J_ Dev Hon Depth mg,k Uthologic Description Unit treet-s 09 MSL) II88I) 01 90-i.....4 BASALT as above. Some vesicles. ', *./* -390 ,,*,a
- .a s *<..,
.t... 80- , * *.'t BASALT. Dark-gray. Weathered. Vesicular. Some vesicles filled with ... :*.a
- green and white clay.
r - 400 70-
- f....., -
.<.,6, - 410 BASALT. Dark-gray. Vesicular. Moderately fresh. Some caved gravel. M 60-
- /.,. /,1, 7
'?,,* -420 ,'l. j BASALT sand. Grayish black. Fresh. Ground to sand size by c; rill bit. Tem '..,'.,*/ i l l ,-). E ' 60-7..6* af[ BASALT. Brownish-gray to grayish black. Fresh. Trace vesicles. Local - 430 .a,**. *. pyrite mineralization at (30 to 435 ft. i.,*.*. s. t,= , * = * *. 40-( BASALT. Dark-gray to grayish black. Fresh. Nonvesicular. a l ,..,4 .g., - 440 f?' ~ T[,'.' -
- a '
- BASALT. Clive-gray to olive-black. Vesicular. Some vesicles filled with
.'.* l *., green clay. Some brecciated clay fragments. ,a'.. 30-7,.. *, [ *, f.*,, BASALT. Dark-gray. Fresh. Nonvesicular. Trace silt from 450 to 460 ft. -450 m ~a.,* * ', , *.. :1 x .4 t 7.'.,,e, ; 20-i - 460 e.. *. l ;*,* * ' i'. *.., BASALT. Olive-gray. Fresh. Trace silt. Nonvesicular. { j FIGURE PUGET SOUND POWER & LIGHT COMPANY LOG OF DRILL HOLE MJ-1 SKAGIT / HANFORD NUCLEAR PROJECT 2 31.14 -4 A l Amendment 28
S/HWP-PSAR 10/15/82 DRILL HOLE Rf-1 Page_2_ oi8.__ 9 0"*H'" Depth k Lithologic Description Unit (feet-S ust) (feet) ot 10 - 1,... ' ',' [, BASALT as above. Local calcite mineralization at 465 to 470 ft. -470 .:'. O...*. 7m ...3 0-
- s
,e 4 B", *. ', *, ,a W. & - 480 Tem S, ',. ' *. '. *, ~': ',,. 7, '. S - 490 U. *. ',, '.. "
- '21
/ ~20-T, *. ' *, ' *, ', ' kBASALT. Olive-gray. Modera'tely weathered. Vesicular. Vesicles filled / .. *.. *,
- Iwith yellowish-green clay.
/ - 500 O', 447 " Sandy clayey SILT to sandy silty CLAY. Light-olive-gray. { 2 ~~~t' 6CE: cf Clayey silty SAND. Li gh t-alive-g ra y. Local pyrite cement. Very-fine-to b medium-grained. Angular to subangular. - 510 p w SAND. Light-olive-gray to yellowish-gray. Fine-to coarse-grained; Ter - 4 0-3 mostly coarse-grained. 3 to 5% mafics. Angular to subangular. ~ 520 l ]--f SAND. as above. with pinkish-gray to light-greenish-gray CLAY fragments. y A i - 530 ~ ~ - - - - - - ' ' ' ~ - - ~ ~ - - - ' - - - - - - - - - ~ ~ ~ g.et g!l ';jyl SILT. with CLAY fragments and SAND. Light-olive-gray; pinkish-gray y 1 and light-greenish-gray. Silt tuffaceous. Clay with waxy luster. l\\\\> . <, a,* * '. ' ,..,l' s al. - 540 BASALT. Brownish-black. Highly vesicular. Many vesicles filled with r clay. Caved sand, silt, and clay fragments. Tp l t 2 *,. -: PUGET SOUND POWER & LIGHT COMPANY LOG OF DRILL HOLE MJ-1 mURE l SKAGIT I H ANFORD NUCLEAR PROJECT 23i.t4-44 Amendment 28 1 i
S/HNP-PSAR 10/15/82 DRILL HOLE M3-1 Page_fL. of _B._ Ele a on Depth e b g. g, gc Lithologic Description Unit y
- ,,f,,
,, '.,.,,',a BASALT, as above. ~550 ~ ~,, S *: r... [ 7,,,,. o ~560 [4' Tp y-,:f.t'.. .~:.'- L e, (* * ' BASALT. Dark-gray. Fresh. Nonvesicular from 560 to 570 ft. Minor ,46. vesicles at 570 to 573 ft. ' '**, ~s.., ~..,. - 570 7... :: -s e.7-EOH 573' G f FIGURE PUGET SOUND POWER & LIGHT COMPANY LOG OF DRILL HOLE MJ-1 SKAGIT / HANFORD NUCLEAR PROJECT rst.14-4A Amendment 28
S/HNP-PSAR 10/15/82 DRILL HOLE m? l Page _._ of __.$. SAMPLE TYPE Project No : 821-1036 Cuttings p Elevation : 470.2 ft. 95 Core, Number Indicates % Core Recovery 425 ft. ( Total Depth :
- E
\\~ Coordinates : Will? W W ' M ?% Chemical Results Listed in Table 2R-1 Date Completed : 0/1/R? Unit Column Refers to General Stratigraphic Divisions identified Within the Site Area : M - Missoula Ill - Ringold, Cycle ill B - Basalt,Undif ferentiated EM - Elephant Mountain Member PM - Pre-Missoula 11 - Ringold. Cycle il RR - Rattlesnah Ridge Interbed IV.- Ringold. Cycle IV I - Ringold. Cycle i P - Pomona Member M" s\\ LO Lithologic Description Unit Elevation Depth Ngt4* ge (f t.Mau (foot) 470-t.j - le j,f e I o Gravelly silty SAND. Me diu:n-light-gray. 75% basalt grains. Coarse-7 's to very-coarse-grained. is '_4 4 i y ~_ ).f Gravelly silty SAND to silty sandy CRAVEL. Medium-light-gray. 75% 2p
- basalt grains. Coarse-to very-coarse-grained.
460-- 10 l* 7 a Gravelly silty SAND. Medium-light-gray. 75% basalt grains. Medium-to M [e very-marse grained; mostly medium-grained. ~'_ III f ~ $ .Q' Gravelly sandy SILT. Medium-gray. Gravel 60% br. salt clasts. y t , 4 6] 450-- 20 h 7 ]j-SAND. Medium-dark-gray. Medium-to very-coarse-graine.d; mostly coarse-grained. 70% basalt grains. Trace silt. v }.:.? ' Q ~ b; o 1 ' o,p 440-- 30 g-L. e Gravelly silty SAND. Moderate yellowish-brown grading downward to yellowish-gray. Moderately well to poorly sorted. 5 to 10% mafics, CI'[,s increasing with depth. Micaceous. Angular to subangular. -d f5 .o al*:. -X a h..a [II.h 430 - 40 ,..c. l sp %i/J. Gravelly SAND. Yellowish-gray. Very-fine-to fine-grained. 5-7% mafics. Angular to subangular. Gravel 20% basalt clasts. Trace T 1..-> silt at 45 to 50 ft. PM 2 g: 6: :f o 420 - 50 .j,f Gravelly silty SAND to silty sandy CRAVEL. Light-olive-gray. 10 to 15% ]p[84*i ( , 8, .[e, mafics. Fine-to coarse-grained. Gravel 25 to 30 % basalt clasts. N ', 8 5.f -
- i.
- l*
gy,',,*.,h Silty sandy CRAVEL. Moderate olive-brown. No cement rinds. Silt ~ .7." adheres to clasts. Sand fine-to medium-grained. j 410-- 60 l 7 3 Gravelly silty SAND. Dark yellowish-brown. Fine-to medium-grained. p y{'e jg 15% mafics. Siit adheres to grains. Subangular to subrouneed. . s( \\ PUGET SOUND POWER & LIGHT COMPANY mURE LOG OF DRILL HOLE MJ-2 SKAGIT / HANFORD NUCLEAR PROJECT es.t4-4s [ Amendment 28
S/HMP-PSAR 10/15/82 DRlLL HOLE m-2 Page 2_ of.ft_ g' *.'" Depth e sc Lithologic Description Unit lL W"' -g 2 ' - ? "? Gravelly silty SAND. as above. Micaceous. Ferruginous stain. Fine-400-- 70 .f 4 t medium-grained; mostly r,edium-grained. No cement rinds on gravel clasts. { e Yk'E' P3 lI'[I Silty SAND. Dusky yellow. Very-fine-to medium-grained, mostly medium-d., j grained. 5 to 7 % mafics. Large muscovite flakes. IE.f j 390-- 80 g e I,j ;{<Cravelly silty SAND. Dusky yellow. Very-fine-to medium-grained; mostly X e ;. very-fine-grained. 2 tc 3% mafics. No cement rinds on gravel clasts. Gravelly clayey SILT to gravelly silty CLAY. Yellow hh-gray to dusky y 1:x;- yellow. Gravel probably caved. 52 V 380--90 I.,f Gravelly SILT, with CLAY fragments. Yellowish-gray. Sand verp fine-di grained. dek l g a .I ~~ JU Tl' _l ' !l!i SIL' AY fragments. Yellowish-gray to 130 ft.; yellowish-gray I l to aow from 130 to 140 ft. Trace gravel at 100 to 105 ft. 370--100 ill Clay gments decrease with depth. d h 3 I i I, !I .I.! i E i, i -110 [t} 360t i m i, 5 ~ 350--120 L 1 8 h T 1 ~. II g,, !' l I 7 l 340--130 'll ll 3 j'i 330--140 ,g ll lll, SILT. Yellowish-gray to dusky yellow. .,2 il ll ll l l ~J FIGURE PUGET SOUND POWER 8 LIGHT COMPANY LOG OF DRILL HOLE MJ-2 SKAGIT I H ANFORD NUCLEAR PROJECT 231.14-4s Amendment 28
i. S / Hi4P-PS AR 10/15/82 'ORILL HOLE M-2 Page l.of.h_. Ih f*..I) S*[# ni i b.jl [ Sandy SILT. Yellowish-gray to dusky yellow. Sand very-fine-erained. p ,'1 Trace clav fraementa. 320--150 b'kI Siltv SAND to sandy SILT. Duskv vellow. Very-fine-to fine-grained m l l 7 l 2-3% maficee Angular to subangular. h ~ . f .I 7 J-l 310--160 Silty SAND. Dusky yellow grading downward to light-olive-brown. lI l Very-fine-to medium-grained; mostly very-fine-to fine-grained. 117 3 to 5% mafica. Angular to subangular. i 7Il 1.. } g. J 300--170 p t % Sandy SILT to silty SAND. Dusky-yellow. Sand very-fine-grained. Clayey in part. t p.j[l'lji h Sandy SILT. Yellowish-gray. Sand very-fine-grained. 7 i 8 I ,,o__ie0 7 9 e.* ~ e Cravelly SAND. Light-olive-gray. Fine-to coarse-grained; mostly fine-to medium-grained. 15 to 20% mafics. Sandy cement rinds on 1-u? e some gravel clasts. Trace silt at 185 to 190 ft. 6 e -190 './,T[ 280-Sandy CRAVEL to gravelly SA';D. 45 to SUI basalt clasts. Sandy cement 7-ysA rinds on some clasts. Sand yellowish-gray; mostly medium-grained; 7,*/,I ' ' ', 7 to 10% mafics. A e *e e Gravelly SAN *D. Light-olive-gray. Medium-grained. Micaceous. Sandy 1-b? -i' cement rinds on some gravel clasts. o (.,[, 270-- 200 [g*/. Sandy clayey CRAVEL. Clay light-olive-gray; possibly weathered u.,.@. 3 '*.. ' basalt clay. ",, *j j _____--__________.____ ,.,"l',*. BASALT. Olive-gray. Weathered and vesicular at 205 to 210 ft. .*.,**l 260 -- 210 ,*s 7',. * * ',. BASALT. Dark gray. Moderately fresh. Vesicular. Some yellowish- .*'.**j green clay in vesicles. t' **...}l, T'" 7 250-- 220 w l } .. ;, c ..1-PUGET SOUND POWER & LIGHT COMPANY LOG OF DRILL HOLE MJ-2 FIGURE SKAGIT / HANFORD NUCLEAR PROJECT a s i.i4-4s Amendment 28
S/HNP-PSAR 10/15/82 DRILL HOLE M i-2
- p. g 4_,,,,,gt,
4c Lithologic Description Unit 'E ( ce e a 9 ,.,. ~, =. .,e,,*, 240-- 230
- ',,* l,*,
"', *,,.,,. BASALT. Medium-dark-gray to 255 ft. Weathered. Vesicular. Some ~ ..... ' vesicles filled with yellowish-green to white clay. l::; *. .v + q 230-- 240
- l, *, *.
2 ~~ 4 220-~200 ' l.,* l,' m, *,
- 2
. =, *... [, ' 'l,'* *.', EASALT. Dark-gray. Fresh. Hinor vesicles to 265 ft. Minor clay (ca ved ?). a., M -260 210-w l .'.*.'.a _pyo 200- , '.,,. *. '.BASALT. Dark-gray. Fresh. Nonvesicular. Local pyrite or calcite mineralization on some surfaces. Minor vesicles from 270 to 280 ft. and fron 290 to 300 ft. '.*a.
- *, l.'
-280 190-c,..., ieo_- 290 . c. .., ~. T iro_- 300 PUGET SOUND POWER & LIGHT COMPANY LOG OF DRILL HOLE MJ-2 FIGURE SKAGIT / HANFORD NUCLEAR PROJECT s t.14-4 e Amendment 28
S/HNP-PSAR 10/15/82 DRILL HOLE m-2 Page.1_ of _ft pth o sc, Lithologic Description Unit g, g 5 :', *,:*< *' ' BA S ALT. Dark-grey. Fresh. Nonvesicular. Local calcite or pyrite on , ',, ', 'some surfaces from 320 to 330 ft. 160 -- 310 a a.. .. ;- l. Tec 2, * '. : / ^ I.','y *,,ah 150- -320 .*.,'e. .a. r a '.* I I I, ' BASALT. Dark-gray. Vesicular. Vesicularity increases with depth. 140--330 Vesicles at 335 to 340 filled with green clay. ...,f 7 c,*ef .. ~..,* ::* a u ,...I -340 mg 130- [M 7 l l M-74 Clayey SIL to silty CLAY. Light-olive-gray. ds!I ,7DW-7N ^
- 2. +' m
- f 120--350 m, I b hi l
SILT to clayey SILT. Crayish-yellow-green. Tuffaccous. n$' ? ' ' i l 's. I ik Ter -360 110 - i Clayey SILT with CLAY and tuf f aceous f ragments. Pale olive. E$q*S l ~ 'plllI ~ i - 370 100 - ,y j Fl i, i I,% T iff -380 go_ 11 ;' l il il i iLid,ild, l l i FIGURE PUGET SOUND POWER & LIGHT COMPANY LOG OF DRILL HOLE MJ-2 SKAGli / HANFORD NUCLEAR PROJECT 2 31.14 - 4 B l l Amendment 28 1
S/HNP-PSAR 10/15/82 DRILL HOLE MJ-2 Page.fL_ of _ft. 'v' U Depth d
- \\
gc Lithologic Description Unit k g Meu (feet) pM ot*9 g Clayey SILT, as above. Pale-olive to grayish-olive. Vesicular l ' basalt clasts in sample at 395 to 400 ft. 80--390 I M j i i1. 2 {' l t l w l ;,;,';; _400 70-g, BASALT. Dark-gray. Moderately fresh. Vesicular. Some vesicles .f,*,*', 1..*. filled with green clay. Caved material from Rattlesnake Ridge '. * * *. *
- interbed from 405 to 420 ft.
Basalt extremely vesicular from 415
- './ 0 '. '<to 420 ft.
- 410 60-Tp e
- f
- c. * *
- c,: l 50--420 l
s...., 45.2-- E0H 425' 1 { l PUGET SOUND POWER & LIGHT COMPANY LOG OF DRILL HOLE MJ-2 FIGURE SKAGIT I HANFORD NUCLEAR PROJECT 231.14-4s Amendment 28
S/HNP-PSAR 10/15/82 DRILL HOLE "J-3 SAMPLE TYPE Page l__ of _4 Project No : 823-1036 @ Cuttings Elevation : 468.5 ft. 95 E Core, Number Indicates % Core Recovery \\ Total Depth. 273 ft. N N451.378.18; E262.629.39 C 2015
- XRF. With Sample Number Coordinates :
,j Chemical Results Listed in Ta' le 2R-1 Date Completed : 8/26/82 o Unit Column Refers to General Stratigraphic Divisione identified Within the Site Area : M - Missoula 111 - Ringold. Cycle ill B - Basalt,UndWerentiated PM - Pre-Missoula II - Ringold. Cycle 11 EM - Elephant Mountain Member RR - Rattlesnake Ridge Interbed IV - Ringold. Cycle IV I - Ringold. Cycle 1 P - Pomona Member cM" 40 h*d Elevation Depth Lithologic Description Unit (f t.usL) (feet) osS9 y e .jf'.f4 Silty sandy CRAVEL to gravelly silty SAND. 50 to 55% basalt clasts. Sand r k.k,"%ll. ~ 1 9 yellowish-gray; very-fine-grained; angular to subangular. 5 W' ~ * [. Gravelly SAND. 75% basalt grains. Very-coarse-grained. Angular to -o:.' subangular. ..a. -10 y .fs*2)., ,s4w 7 J,.- 2: M; '(* Silty sandy CRAVEL to gravelly silty SAND. 50 to 75% basalt clasts. ...h Sand poorly sorted; very-fine-to very-coarse-grained; 45 to 60% basalt ['.N. t. *e .D grains; angular to subangular. r 'Ilh ^ 450-tY.?' A
- d
- 20 r.,.s T } ]{${h t.,J e e. 'j :{)e ~ e Gravelly silty SA';D. Yellowish-gray to dusky yellow. Ve ry-fine-440 - e '. 0l [ G gra ined. <1% mafics. Angular to subangular. Gravel <45% basalt - 30 e
- clasts, l'
- f. aIf M
G ei...' ?. 430-B 3 Silty sandy CRAVEL to gravelly silty SA?D. 20-25% basalt clasts. ff}p.%yj.N cement rinds. Sand moderately to poorly sorted; 5-7% mafics; PM - 40 subangular to subrounded ; yallowish-gray to dusky yellow. .T *;. f;..-
- ' 'fj Crave 11y silty SAND. Yellowish-gray to dusky yellow.
7-10% mafics. Very-fine to medium-greined. Angular to subrounded. Gravel 25% m 420-jj-basalt clasts; no cement rinds. - 50 7 I.%. a ~ "t J i J/ Silty sandy CRAVEL. <50% basalt clasts. No cement rinds. Matrix ..),.7.[ light-olive-gray to moderate-olive-brown. Clay at 55 to 60 ft; g g pssibly weathered basalt clay. / 410 - ~~ ~ ' 8 T.- - 60 3, 5 *!E' BASALT. Oive-gray. Weathered. Nonvesicular. Tem e . :0 e J PUGET SOUND POWER & LIGHT COMPANY SKAGIT I HANFORD NUCLEAR PROJECT LOG OF DRILL HOLE MJ-3 FlWRE a s i.14 -4 c Amendment 28
S/IINP-PSAR 10/15/82 DRILL HOLE MJ-3 Page 2 of,i, 1 Ele v euen Depth A 0 Lithologic Description Unit rj,9 ' (seet-s usL) (feet) ,a
- 4* **,
400-BASALT. Olive-gray. Weathered. Silt and clay at 70 to 75 ft. - 70 7 *, '. ", ', < [,., ' * ' BASALT. Medium-dark-gray at 75 to 80 ft. Dark-gray from 60 to 135 ft. 390- ' **- =. ' Fresh, vesicular to 135 ft. come vesicle.* filled with yellwish-green or =,-l white clay. - 80 se, ,4 a . s ',. 380- '.','/.*' - 90 . c. a.. ',. -
- .'. 'f.
, '. a<, 370- -100 ..a tem l4 } a
- 4 g
,9 l,'
- a 360-
-110 e. P a O 9 a .. 6,* T,* 350- ', =. ' - -120 o 2 340-1 --130 a r. s... e,*,, ,..*e-r1. * * * '. ' 330- '.,'.*/. BASALT. Dark-gray. Fresh. Nonvesicular. Calcite on f racture surf ace at e. I -140 ...i l 140 to 145 ft. m 2 { } FIGURE PUGET SOUND POWER & LIGHT COMPANY LOG OF DRILL HOLE MJ-3 SKAGliI HANFORD NUCLEAR PROJECT a s i.14 - 4 c I Amendment 28 1
S/HNP-PSAR 10/15/82 DRILL HOLE "J-3 Page 1_ of _i_ E 9c Litholo;;1c Description Unit ( $* e 9 320- ~ ', =,. ', *. ' BASALT. Dark-gray. Fresh. Nonvesicular. Calcite on fracture surface 7 at 170 to 175 ft.
- ,~1*.'.
-150 '. ' ', * / . '., = .'.*l -m ... +.,. < a ,a 310- _,.'[., l; ~160 ..*a. Tem .,1 '.. a l.'.,* s * ' 2..,,.. 300- - 170 u',:::: ,.l.',. ~?**.. BASALT. Medium-dark-gray from 175 to 185 ft. Fresh. Minor vesicules 290- ~,*.,',a at 180 to 185 ft. -180 [, ', ',, * ', l .'. l. : : w.c_ T:tth 53j Clayey SILT to silty CLAY. Light-olive-gray. Caved vesicular basalt 280-A-~ clasts. -190 Mm M M::+n : .::' 5 s m Geh.- w : I"Mo . 'i q p Clayey SILT. Light-olive-gray. Tuffaceous. 7 h' ( 270- - 200 sme, w r!:::T hN Clayey SILT to silty CLAY. Light-olive-gray. Tuffaceous. Ter ?.l1,.: 2.: - a L,^- un. -:. ad e l 7hw Silty CLAY to clayey SILT. Grayish-yellow-green. Tuffaceous. 260-5 I rr:: :. l -210 m { Sandy clayey SILT to sandy silty CLAY. Grayish-yellow-green. ar,v,3_,6 Tuffaceous. DE scQ"- Sandy silty CLAY to sandy clayey SILT. Grayish-yellow-green. +-
- 2 +.:-
Tuffaceous. 250-g.;;f* -220 v, w" ~ l W Sandy clayey SILT. Grayish-yellow-green. Tuffaceous. Sand very-fine-2 grained. l l l PUGET SOUND POWER & LIGHT COMPANY LOG OF DRILL HOLE MJ-3 FIGURE SKAGIT / HANFORD NUCLEAR PROJECT a s s.14-4c i l l i Amendment 28
S/HNP-PSAR 10/15/82 DRILL HOLE M3-3 Page_4__ of L. f" g,',8',h k D Lithologic Description Unit g , gc }. Sandy clayey SILT. as above. Ter 7 ' y1.{ 240 - - 230 i ., ', *, l BASALT. Medium-gray grading downward to medium-dark-gray. Moderately _.,,,,.' ; fresh. Vesicular. Some vesicles filled with green or white clay. 230- - 240 l' 'f 4 w,,. N. '. *, ', o 220- -250 / l," *,' BASALT. Dark-gray from 245 to 260 ft. fresh. Vesicles decreasing. 7,. * >,. Calcite crystals at 250 to 255 ft. d
- .*,**.'J Tp 210-
- I ' *.
- 260 { ! '. '.
- I 9
2 7,,*. BASALT. Grayish-black from 260 to 270 ft. Fresh. Large vesicles at 265 to 270 ft. Increase in size of plagicclase phenocrysts at 260 to 265 ft. w 200 - -270 . l.,' ' 195.5-E0H 273' l l FIGURE PUGET SOUND POWER & LIGHT COMPANY LOG OF DRILL HOLE MJ-3 SKAGIT / HANFORD NUCLEAR PROJECT 2 31.14 -4 c Amendment 28
===_ :_: ~ ; DOCUMENT l PU _ LED ANO.sse - NO. OF PAGES REASON O PAGE Ill.EGS2 D MARD COPV FdD AT. PDR CF otwEn - 3 3 D DETTER COP (REQUESTED ON -_ i hPAGE100 LARGE10 FEM. h>CCP(FMD AT. PDR (h OTHER _ DO%il hEMED ON APER 10RE CARD NO b MA% t&\\ow%4S '
I \\ t N 93 M J-1 600-(Proj.100'E) ....;.a... Isis av 11. .c I-u s i o 7_.----- r.-R-
- -u/ Tom 1-b' Te
~ 0-W> Tp Terl .e W 500 f t. -600 Scale k /.
I S/HNP-PSAR 10/15/82 < S EXPLANATION 73 M M'SSOULA FLOOD GRAVELS PM PRE-MISSOULA FLOOD GRAVELS -600 RINGOLD FORMATION IV UNIT IV e g gy' lil UNIT 111 11 UNIT 11 gyy/ l-u UNIT l - upper m ~ -0 O l-b UNIT I - basal COLUMBIA RIVER BASALT GROUP e Tem ELEPHANT MOUNTAIN MEMBER IAI Tor RATTLESNAKE RIDGE INTERBED --500 To POMONA MEMBER ........... Gradational contact between Missoula and "re-Missoula Flood Gravels --?-- Inferred or indeterminate contact PUGET SOUND POWER & LIGHT COMPANY SKAGIT I HANFORD NUCLEAR PROJECT PRELIMINARY SAFETY ANALYSIS REPORT NORTH-SOUTH GEOLOGIC CROSS SECTION DRILLHOLE 93 TO 73 FIGURE 231.14-6 i Amendment 28
l S/HNP-PSAR 10/15/82 LINE 8C W E 400- - 600 MJ-3 MJ-2 MJ-1 u u _a x x m [................. N ..ee.......... 3400-PM - 400 11 7 9 7 Tom
- ::- % 9
-2% 11 - 200 200 - N Tem Tp l-b e Ter e Tp O O-W -200 -200 EXPLANATION M MISSOULA FLOOD GRAVELS PM PRE-MISSOULA FLOOD GRAVELS RINGOLD FORMATION IV UNIT IV lil UNIT ill ll UNIT 11 1-u UNIT I-upper I-b UNIT I - basal COLUMBIA RIVER BASALT GROL'P Tem ELEPHANT MOUNTAIN MEMBER Ter RATTLESNAKE RIDGE INTERBED Tp POMONA MEMBER Gradational contact between Missoula and Pre-Missoula Flood Gravels --7-- Inferred or indeterminate contact NOTE: Unit designations are questioned whese identification of unit is uncertain. O 400 PUGET SOUND POWER & LIGHT COMPANY I SKAGIT / HANFORD NUCLEAR PROJECT Scale Feet PREUMINARY SAFETY Horizontal = Vertical ANALYSIS REPORT GEOLOGIC CROSS SECTION p \\ LINE 8C FIGURE 231.14-7 Amendment 28
S/HNP-PSAR 10/15/82 e i E e s I S = 0 8 \\/ ) e s8 ~ ~ ~ 8 w s s s i h l D I N \\ [ / a O* td 1 b N N l / l / l I / s i N i 4-2 s ~ ( E. 2 I U } 5 i I 6 i "1 0 E E, E (l**l) Hid30 PUGET SOUND POWER & LIGHT COMPANY SKAGIT I H ANFORD NUCLEAR PROJECT PRELIMINARY SAFETY ANALYSIS REPORT GEOLOGIC MODEL OF GRAVITY LINE 8C FIGURE 231.14-8 Amendment 28
S/HNP-PSAR 10/15/82 QUESTION 231.15 Provide a table and/or other device showing the relation-ship between the various site area lithologies and velocities (downhole, crosshole and refraction).
RESPONSE
The downhole velocity profiles presented in Appendix 2K and 2L have been annotated to indicate seismic velocities f or the near-surf ace layers as determined f rom surf ace refraction and crosshole measurements together with the identification of the stratigraphic horizons as obtained from the boring logs prepared by Golder Associates and presented in Appendix 2R. The correlations observed on the enclosed annotated velocity profiles (Figures 231.15-1 through Figure 231.15-6) are shown schematically on Figure 231.15-7. O I l l i l ) Q231.15-1 Amendment 28 ww--m _-g, g
( ( LINE 4 A-1 s-n
- a" i= > f sw 83 500-_
2600-2700
- - PM 6
IV G,. 3 lli 11 o-IV -ioo-LINE 4 s-n
- =" < * > f s-is
- ="<*-
soo soo 1800-M 2_0_ as soo-soo-M 2500-2700 30C pg py .w- .m-5 soo-~ 5 soo-~ 6 6 i i iv 5 IV 5 roo- - r oo- ~ - _ _ 6 Memp -g.m ion.- ico-gig ll 0-11 f, ..oo IU . co.
S/HNP-PS AR 10/15/82 { L S-8 "j"'" i * ' [ a a (e $s _M 1800 3200 soc-PM g 3._ g iv s B-74 "l"'" i* '[ 5,, lll .oo [ GROUND SURFACE ~ ELEVATION 01 e ll soo-M <3500 ioo_ VELOCITY VALUES 2500 MEASURED BY SURFACE REFRACTION DU o-p IB " DOWNHOLE VELOCITY PROFILE y 6 i 5** til N N } STRATIGRAPHIC CL ASSIFICATIONS l\\ of ter:Golcer Assocuotes, Appendis 2R .co-2*' S -12 "j"'"t*'[ S-10 "I"'" ' * ' [ (U .ao o-- a s. ss soo. M 1800 iBOO soo-3000 3000 eco- .oo. py g soo-- l soo-iv iv l 800-too-ill PUGET SOUND POWER & LIGHT COMPANY [g SKAGIT / HANFORD NUCLEAR PROJECT PRELIMINARY SAFETY ANALYSIS REPORT II o-iU ANNOTATED DOWNHOLE VELOCITY PROFILES, iU IB LINES 4D AND 4A-1 ? _,oo_ FIGURE 231.15-1 + Amendment 28
A\\ [ LINE M 5-8
- " '* 'f S-9
- {W" V"'f SC
'{*" U* > f am sm sm ss os as '"~ '"~ f800 '"~ _M 1800-2000 1500 M y WO 3200-3500 2800-3000 .m- .m- .m-pu p pg ) soo-I soo-i sm-lv 5 iv s iv s# Q 5 U 8* O'* Ill y 80& lil lil 11 im-ioo-ll .co-11 ] '- IV 0~ o-LU ~ IU ~ 18 IB ..oo ~ ~ . ioo-B LINE W VELOCITY PROFILE FROM CROSSHOLE MEASUREMENTS "i,*"'*'fs-2 dg*"""'f LINE W-STATION 100+00 3.i3 wgwn twig 3-15 ,,o m Vp Vs 8; 2000 GS M ss M 2000 s:, M 1800 1700 900 ,oo_ 3500 3000 2600 3100 1550 400- - PM .oo-py - py 7200 2600 8500 3000 j soo-I O g IV IV gy W too-M- = lil ~ I lil til iom_ ll Il 11 o- ~ ItJ IU IU . ioo-(
S/HNP-PSAR 10/15/82 l' L B-74 "l"'" "" ' 7 Goo [ GROUND SURFACE ELEVATION G1 soo-M (3500 VELOCITY VALUES 2500 MEASURED BY __ SURFACE REFRACTION " DonNHOLE VELOCITY PROFILE y .Os . aoo-Ill } STRATIGRAPHIC CL ASSIFICATIONS -LI of ter: Golder Assocootes, Appendia 2R . co-IU ~ IB ..oo. LINE X l "I"'" ""'[ S-17 "j"'" "" '[ S*l4 a so-eoo - 1800-2000 soo__ ,s,,s_ -l800-2OOO M 2500-2800 2800-3000 i aco-PM
- m-py 5 soo
~ 5 soo-- N 6 iv d roo- - 200-lli PUGET SOUND POWER & LIGHT COMPANY ion _ gg, SKAGIT / HANFORD NUCLEAR PROJECT 11 PRELIMINARY SAFETY ANALYSIS REPORT o-11 ANNOTATED iu DOWNHOLE VELOCITY PROFILES, -i=- iu LINES X-1 AND M AND W .,co. f j FIGURE 231.15-2 i Amendment 28
l LINE 2 r 8-74 "s'"'" "" "e** 8-70 "s'"'""""e*' 8-69 '"s"'""""e*' " Goo Goo 6 too as as 3500 ' soo-M soo-y soo-3 as ( 2500 2500 g 3000
- oo-pu 400 4
pg PM -I soo-,_ -I soo, IV ii soo-ly ly ? ? ? ~ g 3 ? a
- g d too tw Igl
- roo-da
~ 11 - II ~ 11 eco-ico-em. i< 1U IU IU IS IB IB TEM TEM . ioo- . ioo - LINE I B 13A "j"'" "" ' [ 8-10 "I"'" "" "e# B8 "f"'" l * " # B4 soo soo-- soo soo as _ 1900 1500
- soo, soo soo-soo-M 2000 ss y
3000 ~ 3000 400-400-400-400--. PM PM PM pi _1 soo-- ) soo- ) soo-soo-IV IV 1% IV
- 8 8
c g j j d soo-_ ____ d ro& aco-d soo-II: lit lil ioo-eco-eco-roo-g 11 I 10 o-o-- o-o- IU IU = Tl IU STRATIGRAPHIC ~ IO TEM - 'o0 -~ INFORMATION FROM -'" IB g -ioo- \\ IB / __ COREHOLE 78 8
S /IIMP-PS AR 10/15/82 ( L e-38 dj u'" i s ",*' s-32 "lx ' " "a ",*' e-33 dlx'" opig 4 soo .oo B-74 dl*'" """[ cs s-sm-1500 sm-GROUNO SURFACE 3 1300 ' ELEVATION y GS G S-M a 2200 2500 -M --1500 3000 (3500) VELOCITY ,w_ y ' ' ~~ VALutS PM PM 2500 MEASURED BY PM SURFACE REFRACTION -._ly PM o-._ 3m- ~g sm-lgl Ill ~-- too-too- ~ V " DOWNHOLE VELOCITY PROFILE ll f 11 E IU A aw 10 i,, N.. ~~ gy TEM } STRATIGRAPHIC CL ASSIFICATIONS TEM o n Golau Assaiorn, Appendis 2R lB ,oo. o-o- o-IU o-_ o- . oo- ..oo-IB .to0-VELOCITY PROFILE FROM CROSSHOLE MEASUREMENTS ADJACENT TO COREHOLE 3 ,m,n g,, g, B -9 " *'" M **' 9 e i e a a W Goo vp V. G. S. 3500 1600
- oo-2l00 1100 2300-3000
- s 400 3650 1800
.o, d 5800 - -3200 2500-3000 M 7100 - -4200 9100 4500 } 3m__PM i IV? y Ereo-lil? eco-PUGET SOUND POWER & L.GHT COMPANY ll? SKAGIT I HANFORD NUCLEAR PROJEC: PRELIMINARY SAFETY ~lu7 ANALYSIS REPORT o-o- ANNOTATED DOWNHOLE VELOCITY PROFILE, LINES 1 AND 2 e - ioo - FIGURE 231.15-3 ( Amendment 28
I l LINE 5 k 0-25 "j"'" i* 8[ 0-29 "j"'" '* '[ .ao soo soo. sm-es os _ig M M 3000-4000 em-.. em-- 2500-3000 PM l PM isoo-IV i 3oo_ L w 6 6 i ni 3 d roo-_ d too-gg 11 soo-- ] im-IU TEM IU TEM . co- . ioo._ LINE 3 g.g wgoo"t*'7 s-45 "l"'" i * ' 7 6-43 "f"'" ' * ' 7 eoo soo em s s-s.s. Soo-M soo-M soo-3500 es PM pM 3000 eoo-- 4000 em-,_ em-tti pu }soo-Ill json-soo-Zitf/_ _ 6 = tut _ _ l ,6 u 1 e 3 18 7 - so> mos- .- som _. TEM ]EM g = iu _ _ _ ico-soo. ioo-IB _B o-o- . co. .so -im- .v,
S/ilNP-PSAR 10/15/82, B-T4 ","'*"[ soo GROUND SURFACE ELEVATION o1 soo-M <3500 VELOCITY VALUES 2500 ME ASURED BY SURFACE REFRACTION em-pg _$ '* y " DOWNHOLE VELOCITY PROFILE 6 1 8* lil s,,N li } STRATIGRAPHIC CL ASSIFICATIONS of ter: Golcer As sociates, Appen&s 2R .o% g.35 'fjo" '* "[ IU soo ~ 18 sN-y 2500 . oo- .co_ PM 3500 IV 1 sco-- g. -g d soo-ll FUGET SOUND POWER & LIGHT COMPANY IU SKAGli / HANFORD NUCLEAR PROJECT TEM PRELIMINARY SAFETY ANALYSIS REPORT ANNOTATED DOWNHOLE VELCCITY PROFG' E, LINES 3 AND 5 i . ico-FIGURE 231.15-4 k Amenciment 28
e ( b LINE GB (
- g. ll4 W@" twi[
g.gg7 W@n twig soo soo Soo-Soo- .s s .co-w- 1500-2000 ss M 1800 -2500 M PM ~ ! =-- iv7 i Iv7 5 g lil? d soo-til? w too-I 11 7 117 soo. ico-7 lu? _lU TEM TEM o-- o- . ioo- .ioo. LINE 4C B 52 "I"'" '* '[ B-53 "f"'" t*'7 8-S4 soo eco soo es Ss* Soo-soo. ss - 1500 e.s. M y ^ 4000 M 2500 2500-3000 .co- .co- .oo-- PM PM PM -I soo_ Iv g3,_ gg7__ ]
- m-l jy l
5 5 5 li? I E iu? i;i d soo-d 3oo-d am--TEM lli l t l 1 1 ~ 1 lO 4@ l@ 11 _ TEM lu o-iu o-i i TEM .iw ..oo. / s
S/liNP-PSAR 10/15/82 S, LINE 4A e-izz se e no ex. i.. sm- ,Ys-a s. as M _ 2500 M P600 2600 M ew-4n-aw-PM TV PM PM t sm- - soo- -l17 -Ti? in-g 6 ~IU? j E? E "I E l TEM 3 d soo-- l 1 i B B-74 S g too-an- [I GROUND SURFACE ELEVATION or IU ,oo. y <3500 TEM VELOCITY VALUES 2500 MEASURED BY a-w o-SURFACE REFRACTION ~ y " DOWNHOLE VELOCITY PROFILE 6 s 111 N. } STRATIGRAPHIC CLASSIFICATIONS ,ll / of ter:Golcer Associates, Appendin 2R e.ss w;a" <*"f B 68 "i""'*"# g/ gwn i..y .= ( 1 o-~ ( soo-soo-es 2500 _ M 2500-3000 .J M 3300 PM ) S*~ ll7 } SM-- l 6 IU7 6 ll? I B k I? 200-- d roo-B l PUGET SOUND POWER & LIGHT COMPANY SKAGIT / HANFORD NUCLEAR PROJECT PREUMIN ARY SAFETY ANALYSIS REPORT ANNOTATED DOWNHOLE VELOCITY PROFILE, LINES 4A,4C AND 68 -, oo. I FIGURE 231.15-5 Amendment 28 l
), LINE 6A (w B 98 "j"'" # 7 8-55 "l"'" "[ eoo soo soo-soo-8'8 ss M M eco-eco-4000 g,g IPM PM -1 soo-1 soo-It? Ill ? O 4 4 _.tu? 4 a B 5 ? too-3 soo-- IU eco-- soo-TEM o-o- ..oo. ..co-( LINE 6 s 10 9 "j"'" N7 e 54 "f" soo ee soo-soo-as ss M M .oo- .on-~ l N PM II? -1 soo- ,5 soo--Lil?~ ~ ~ IU? j ggp j 3 B l 1 JU? 4 roo-- d too. TEM ioo-eco-o- o- ,( z t,
S/IINP-PSAR 10/15/82 f e-roo d,toon twig tm - = dS 1500 M 3200 }M lil'? l l III g.74 wtoon twig en- .oo GROUND SURFACE }U? f ELEVATION / TEM GS eos-_ soo-M <3500 2500,> VELOCITY VALL'ES MEASURE 0 BY SURFACE REFRACTION
- ~
.ao. p ' DOWhMOLE VELOCITY PROFILE - *w-y I i ~ _ _. _
- '"- ill N.
} STRATIGRAPHIC CL ASSIFICATIONS .f otter:Golcer Assocrates, Appenda 2R '*'7 ru "/- .w-w
- ~_is 1
..w-j500 l l ( l l F11GET SOUND POWER & LtGHT COMPANY SKAGIT / HANFORD NUCLEAR PROJECT PREllMINARY SAFETY l ANALYSIS REPORT ANNOTATED DOWNHOLE VELOCITY PROFILE, LINES 6 AND 6A FIGURE 231.15-6 Amendment 28
S/HNP-PSAR 10/15/82 g 43 VELOCITY (fps ) x 103 5 to 3 600 .4. 500-b GROUND SURFACE ELEVATION / a.s. VELOCITY VALUES / MEASUREDBY SURFACE REFRACTION ~ 3000 lV , DOWNHOLE VELOCITY PROFILE f 300-Z STRATIGRAMMIC CLASSIFICATIONS offer: Golder Associates, Appendon 2R / w d 2 00-II - lu ? - - 100-IB 0-EOH PUGET SOUND POWER & LIGHT COMPANY SKAGIT / HANFORD NUCLFAR PROJECT PRELIMINARY SAFETY ANALYSIS REPORT 1 TYPICAL VELOCITY / STRATIGRAPHIC CORRELATION FIGURE 231.15-7 Amendment 28 .. -.}}