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UNITED STATES OF AMERICA NUCLEAR REGULATORY COMMISSION BEFORE THE ATOMIC SAFETY AND LICENSING BOARD I
In the Matter of )
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PACIFIC GAS AND ELECTRIC COMPANY ) Docket No. 50-275-OL ;
) Docket No. 50-323-OL i Units 1 and 2 )
) i Diablo Canyon Site )
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RESPONSES OF PACIFIC GAS AND ELECTRIC COMPANY I TO CERTAIN OF THE INTERROGATORIES PROPOUNDED BY INTERVENERS REGARDING GEOLOGY, SEISMICITY l QUALIFICATION i
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DATED: MAY 18, 1977 !
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April 19,1977 1310 Interrogatory No. 5 Do you contend that the Hosgri fault is not linked to the San Gregorio fault to form one fault system 7 If so, please state each and every fact upon which you base this contention.
Response
We contend that all available evidence Indicates that the Hosgri, San Simeon, offshore Pfeiffer Point, Sur, and San Gregorio, as well as many lesser, unnamed ;
faults and many folds and flexures are parts of a flexure system of sub-regional extent that defines the boundary separating the mostly onshore up1 Lit of the Southern Coast I
Ranges of Califomia from a series of offshore basins along the central part of the Cali-l fornia continental margin. This structural "rystem" or boundary zone therefore includes the named Hosgrl and San Gregorio faults, but the deformation that it represents is only partly accomplished through faulting. Severa111nes of geologic and geophysical evidence demonstrate that the principal individual fault breaks within tLe boundary zone are not thoroughgoing or " linked" with one another. The main elements of evidence pertaining to this ques +1on that were available through 197 5 are cited in the documents Appendices 2.5D and 2.5E to the Final Safety Analysis Report (FSAR) for Units 1 and 2, Diablo j 1 j Canyon Site. The evidence cited in those documents includes not only the mapping done 1
l to develop necessary documentation and responses to further queries for the DCNGS licensing, but also two independently prepared maps of parts of the boundary zone fault pattern (Hoskins and Griffiths,1971, and Wagner,1974), which have been used as basic data for the Fault Map of California complied by Jennings (1975). An important addi-tional element of geophysical evidence about the structure of the coastal boundary zone l
!s contained in the U. S. Geological Open-File Report 77-79, " Maps showing residual magnetic intensity along the California Coast, Lat. 37 '30'N to 34 30'N" by D. S.
McColloch and R. H. Chapman, which was released in AprI11977. These maps reveal l a striking correspondence between the pattern of magnetic intensity end the pattern of l l
faulting developed independently from seismic reflection and gravity data, as shown on j
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l Plates IN and IIN of Aplendix 2.5E to the DCNGS FSAR. The pattern shown by both sets of data is one of a series of en-echelon faults, which typically turn toward more 4 westerly orientations at their northerly ends. Pronounced linear magnetic gradients, indicating structurally intact blocks, extend across areas where any significt.nt links between the Hosgri and San Simeon, and the San Simeon and Sur faults would have to be located. ;
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April 26,1977 1310 Interrogatory No. 6 Do you contend that the Hosgri fault is not linked to the San Simeon fault to form I
one fault system 7 If so, please state each and every fact upon which you base this con-tention.
R_esponse We contend that the Hosgrl fault is in fact pg " linked" to the San Simeon fault to form one " fault system". Evidence upon which this contention is based is presented in the response to NRC Question 2.19 (from the NRC letter dated February 12,1975), en-titled "The geology of the northern reaches of the Hosgri fault zone and the relationship of the Hosgr! fault to the San Simeon fault". That response includes discussion, maps, seismic reflection profiles, and referances. The evidence cited there shows that sig-nificant linkage between the Hosgri and San Simeon faults is precluded by the location and continuity of geologic contacts and the distribution of " acoustic units" correspond- i Ing to geologic formations, extending through the area between Estero Bay and San Simeon where any such " linkage" would have to be located, and by the pattern of branch-Ing of the two faults. The indicated pattern is that the Hosgri and San Simeon faults are subparallel and are en echelon to one another, but are not joined. This pattern is shown in the two other published maps of offshore geology in the vicinity of the two faults, by l H. C. Wagner (1974) and Hoskins and Griffiths (1971).
Subsequent to the filing of the data and interpretation noted above, important new data consisting of maps showing residual magnetic intensity along the California Coast, Lat. 37 30' N to 34 30' N, have been released as the USGS open-file report 77-
- 79. These data are especially significant because of the clear expression in the pattern of residual magnetic intensity of the structure in the area of closest approach between the Hosgri and the San Simeon faults. In this area, a well defined linear magnetic gra-dient exists along'the northeast margin of the Hosgri fault zone, while a linear trough in the magnetic intensity field accompanies the San Simeon fault from north of Breaker Point to south of Point San Simeon. The gradient and the trough are subparallel, and
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there are no features in the magnetic Intensity pattern that suggest the existence of a I connecting cross fault or structure. l l
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April 26,1977 1310 Interrogatory No. 7 Where do you contend is the location of the southeasternmost or downcoast cad of the Hosgri fault? Please state each and every fact upon which you base this con-tention.
i R esponse_
We contend that the southeasternmost end of the Hosgri fault is at a point lo- l cated about 5 miles south of the latitude of Point Sal, and about 5 miles west of the I
coastline between Point Sal and Purisima Pohit. A probable branch or splay of the Hosgri, referred to as the West Hosgri, extends about 2 miles farther southeast. The bases for this contention are presented and documented in the report "The geology of ,
the region of intersection and merging of the offshore Santa Maria Basin and Hosgri f fault trends with the Transverse Ranges trends" in Appendix E to the Units 1 and 2 Diablo Canyon site FSAR.
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I Interrogatory No. 8 What amount of strike-slip movement do you contend has occurred on the Hosgri fault since the Miocene geologic time period? Please state each and every fact upon which you base this contention. i I
R esponse We contend that the maximum amount of strike-slip movement that could have l occurred on the Hosgri fault since Miocene time is in the range of 10 to 20 km. This is l based on evidence described in the paper "llosgri fault zone; structure, amount of dis- I placement, and relationship to structures of the Western Transverse Ranges", by D. H.
Hamilton and C. R. Willingham, presented as part of the symposium " San Gregorio -
Hosgri fault system - Impiccations for the tectonic developmait of the central California continental margin" at the 1977 Cordilleran Section meeting of the Geological Society of America (abstract attached). The major elements of evidence leading to this conclu-sion are as follows:
- 1. Theline of relatively continuous rupture of Miocene and younger rocks along the Hosgri fault zone dies out 5 mHes south of Point Sal, and faulting becomes diffuse and discontinuous along the zone a few miles north of Point Estero. This indicates that the amount of lateral slip (strike slip) that can have occurred along the fault since Miocene time is limited to the amount of differential movement that can be distributed by folding and thrust faulting in the rocks near the end points of the fault. This could possibly be as much as 10 to 20 km, especially in the area of folding from Point Sal south, but not significantly more.
- 2. The stratigraphic section penetrated by the Oceano wen, located on the west side of the Hosgri fault, most nearly corresponds to the stratigraphic section in the i adjacent onshore region, directly across the Hosgri fault. The uncertainties inherent in correlation based on lateral projection of geolog!c units are such, however. that 10 l
to as much as about 20 km oflateral offset of the Oceano wen section, relative to the ]
onshore section, could have occurred. Also, the Oceano well section ~1s clearly unlike j l
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the section that is characteristic of the Western Transverse Ranges and Santa Barbara Channel, where 5000 to 10,000 or more feet of lower Tertiary strata are present that do not appear in the Oceano well section.
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l HO60RI FAULT ZONE: STRUCTURE, AMOUNT OF DISPLACEMENT, AND RELATIONSHIP TO FrRUCTURES OF THE WESTERN TRANSVERSE RANGES HAM:LTON, Douglas H., and WILLINGHAM,C.R! chard, Earth Sciences Associates, Inc., 701 Welch Road, Palo Alto, Californla 94304 The geology of the offshore regionalongthe continentalmarginolsouth central California has been mapped using geophysical and strat! graphic data 6erived from power plantitcensing studies and petrateum exploration. W1Udn th!s area, the near shore Hongrl, San Simeon, and Sur faults form the principalboundaries between the onsbore uplift of the southern Coast Ranges and the offshore ba-sins. The main part of the Hosgri fault, the most southerly of this series, de-fines a linear sone that strikes N26 Wand extends over a136 kmdistancebetween the vicinities of Point Sal and CapeSan Martin. Although the Hoogri tardt sono served as a boundary structure with predominantly vertical displacementadur-Ing middle Tertiary time, several lines of evidence indicate that late Tertiary movaments along the cetral reach of this fault have been charneterland, at least in part, by right oblique slip. Strat!grcphic evidence based on compari-son of the section penetrated by the "Oceano No.1" won, located west of the fault, with sections east of the fault, Indicates a maximum of about 10 to 20 km
, of right lateral sity along the !!osgt! sone since Miocene time. The lateral j
allp Is accommodated in folds and reverse slip splays at the north and south j onds of the fault sone. Splay faults at the south end of the Hosgri, and both !
faults and folds in the ground farther south, band toward and mutually Interfere d
with faults and folds extending seaward from the Transverse Ranges province to the east A pattern of interference, rather than truncation of one system by '
the other, apparently results from mutual accommodation between the right lateral movements a f the Hosgr! system and the left lateral movements of the Trsnaverse Ranges system. i l
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Interrogatory No. 9 Do you contend that the strong (7. 3M) carthquake recorded near the central California coast on November 4,1927 did not take place on the Hosgri fault? If so, please identify the fault on which you contend this carthquake did take place and state each and every fact upon which you base this contention.
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Response
We contend that the combination of seismologic and geologic evidence regardir4; the November 4,1927 M 7.3 earthquake indicates a conclusion that the carthquake did not take place on the Hosgri fault. The fault that we believe is indicated by geologic I evidence to be the mostlikely source of that earthquake is referred to in Appendix 2.5E to the Units 1 and 2, Diablo Canyon site FSAR as the offshore Lompoc fault. The j seismologic and geologic bases for this contention are given in the Response " Location and source of the 1927 Lompoc earthquake" to NRC request for additional information 2.20, as presented in Appendix 2.5E to the Units 1 and 2, Diablo Canyon site's FSAR.
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1 Interrogatory No.10 Has P.G.8tE. conducted geologic mapping of the Piedras-Blancas region? If so, please state:
(a) The identity of the person or persons who actuany conducted such mapping; (b) The professional qualifications and experience of such person or persons;
. (c) A detailed description of the results of such mapping.
Response
The Pacific Gas and Elcetric Company's geologic consultant, Earth Sciences l Associates, Inc., has conducted geologic mapping of the onshore region extending from l
the vicinity of San Simeon north to the vicinity of Ragged Point, and also geologic map-ping of the adjacent offshore region, an of which may be considered to represent the "Pledras Blancas region". This mapping was accomplished in accordance with the fol-lowing:
(a) Geologic field mapping of the onshore region was done by T. D. Hunt and l
L. K. Lubetkin, staff geologists with Earth Sciences Associates, Inc. Photogeologic study of the region was performed by R. H. Wright, senior geologist, and D. H. Ham-l 11 ton, principal geologist, with Earth Sciences Associates. Mapping of the adjacent offshore region was done by C. R. Wluingham, geologist / geophysicist with Earth i
Celences Associates. Au mapping work was reviewed by D. H. Hamilton.
(b) Resumes of the five geologists named in (a) above are attached.
(c) The results of the mapping are shown on the geologic maps, Plate II(N) and f 1
III(N) accompanying the response "The geology of the northern reaches of the Hosgri fault zone and the relationship of the Hosgri fault to the San Simeon fault", to NRC re-quest for additional information 2.19 (from the NRC letter dated February 12,1975),
and in parts of the discussion in that response, presented in Appendix 2.5E to the Units 1 and 2, Diablo Canyon site FSAR. A previous discussion of the San Simeon fault is given on pages III-14 to III-16 of the report " Geology of the southern Coast Ranges and the adjoining offshore continental margin of California, with special reference to the geology in the vicinity of the San Luis Range and Estero Bay", Appendix 2.5D to,the Units 1 and 2, Diablo Canyon site FSAR.
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DOUGLAS H. HAMILTON Vice President and Principal Engineering Geologist Earth Sciences Associates Mr. Hamilton is experienced in engineering geology, economic geology and grotmd water geology, and has specialized in investigations for nuclear power plant siting, dams and other large engineering projects, land use and environmental geology studies, mineral resources studies, and regional ground water investigations.
He has served as consultant and expert witness in dealings between utility cx)mpanies l
and regulatory agencies, especially in regard to questions of geologic safety and environmental impact. He is a member of the American Nuclear Society Subcom-mittee on Surface Faulting, and he has given testimony in court as an expert witness in litigation regarding ground water and other geotechnical questions. Additionally, he has carried out basic studies relating to fault movement and land subsidence, localization and mechanics of large rockfalls, and regional geology and landform j l development. He is a specialist in photogeologic interpretation, and in the evalua-tion of mineral resources.
Mr. Hamilton recently directed regional geologic and geophysical studies conducted along the California coast line extending from Monterey Bay south to Point Concep- !
tion. Extensive onshore and offshore studies were made to determine geologic and tectonic condJtions throughout this area. He has also directed studies of geotech-nical conditions pertaining to water resources and power plant development in sev-eral portions of the greater Bay Area, including San Mateo and Santa Cruz Counties.
Education B.S. , Geology, Stanford University,1956.
M.S., Geology, Stanford University,1962 Candidate for Ph.D., Geology, Stanford University.
Professional _ Registered Geologist No. 56, State of CalLfornia, with AffiUntions Certification as Engineering Geologist No. 31.
Association of Engineering Geologists.
Society of Mining Engineers of the American Institute of Mining, Metallurgical, and Petroleum Engineers.
American Geophysical Union.
l Geological Society of America.
Society of Economic Geologists.
. Sigma XI (bonorary scientific fraternity).
American Association for the Advancement of Science.
Publications " Continuing Surface Displacements Along the Casa Loma and San Jacinto Faults in San Jacinto Valley, Riverside County, California".
Engineering Geology. Jan.1966.
l " Ground Rupture in the Baldwin Hills", Science. Vol.172 No. 3981 April 1971.
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1 Interrogatory No.11 Do you possess or are you aware of any studies, reports, data or other infor-mation which relates in any way to the age of the non-marine rocks in the Pedras-1 Blancas range? If so, for each such report, study, piece of data, or other item of in-J formation, please state the following: l (a) The identity and professional qualifications of the persons who conducted the j study and/or gathered the data; I
(b) The dates during which the study was conducted and/or the data was gath-ered; (c) The type of data that supports the etudy and/or the type of data itself (e.g.,
radiometric dating, rock samples, etc.);
(d) A detailed explanation of the findings of the study and/or the age determina-tions such data supporte.
Response
l We are aware of three reports in which probable or inferred ages are assigned to various of the geologic units exposed in the "Pledras-Blancas range". These are, in ;
j order of issuance, '
l 1) Geologic map of the coastal area near Piedras Blancas Point, San Luis Obispo County, California, Plate IH(N), accompanying the report "The geology of the northern reaches of the Hosgri fault zone and the relationship of the Hosgri fault to the San Sim-l con fault", in Appendix 2.5E to Units 1 and 2, Diablo Canyon site, FSAR.
l This map identifies intrusive velcanic rock (TV) and mafic sedimentary breccia l (mb) units as being of " Probable Tertiary" age. The assignment of probable age was based on the superposition of these units unconformable over Igneous mafic and ultra-mafic basement rocks, and on their partial resemblance, suggesting possible strati-graphic equivalence, to the Lospe Formation, of presumed Oligocene age.
The mapping was done as described in our response to Interrogatory No.10, during the time interval between July 9 and September 2,1974.
, 2) Report " San Simeon - Hosgri fault system, Coastal California : Economic
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and Environmental Impilcations, Science, vol,190, no. 4221, p.1291-1294 (1975), by C. A. Hall, Jr. l This article identifies the same rocks as those mapped as the " mafic!sedimen-tary breccia" unit on the map described in (1) above as Lospe Formation, and suggests that this unit is of stratigraphic and age equivalence to the Lospe Formation, of pre-suined Oligocene age, in the Point Sal area. No specific age dating is indicated in the report. We presume that this report was based on field work done by C. A. Hall, Jr.
Dr. Hall visited the San Simeon - Piedras Blancas region in the company of D. H.
Hamilton of Earth Sciences Associates, Inc. In the fall of 1974, prior to undertaking his fleid research, and his results were first released as a U.S.G.[h open file report in '
the fall of 1975. We therefore believe that Dr. Hall's field work was done during the summer of 1975.
We do not have specific knowledge of Dr. Hall's professional qualifications. He is Professor of Geology at the University of California at Los Angeles, and has published several reports on various aspects of geology in the Southern Coast Ranges region.
- 3) USGS Miscellaneous Field Studies Map MF-784 " Geologic Map of the San Simeon - Piedras Blancas Region, San Luis Obispo County, California," by Clarence A.
Hall,1976.
This map includes a " Description of Map Units" section in which the Unit identi-fled as Lospe Formation is classified as Oligocene. No basis for this age assignment is given. Other units are assigned geologic ages on the basis of presumed stratigraphic l equivalence with units exposed in other areas.
We do not possess and are not aware of any other information relating w the age of the "non-marine rocks in the Piedras - Blancas range".
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Interrogatory No.12 Do you possess or are you aware of any studies, reports, data or other informa-I tion which relates in any way to the age of any materials in Standard 011 Company's Oceana well, in' . ing without 11mitation the age of the sediments in such well? If so, I for each such rer- study, piece of data, or other item of information, please state the following:
(a) The identity and professional qualifications of the persons who conducted the study and/or gathered the data; (b) The dates during which the study was conducted and/or the data was gathered; (c) The type of data that supports the study and/or the type of data itself (e.g. ,
radiometric dating, rock samples, etc.);
(d) A detailed explanation of the fir. dings of the study and/or the age determina-tions such data supports.
R esponse Our informaticu relating to the Standard Oil Company Ocenna No. I well consists of a Schlumberger induction electricallog of the well, on which typed annotations as to l geologic age, formation,11thology, tests for hydrocarbons, and foraminiferan age facles l' l
l appear. This log was released by the U. S. Geological Survey, but we believe that the data are from Standard. The indicated geologic ages appear to be only from micro-paleontologic analysis of samples from the well cuttings or cores. No radiometric age I determinations are available to us from this well.
As indicated in our response to your Interrogatory No. 6, we believe that the data now avs11able to us from the Oceano Well indicate a correlation of the stratigraphic section penetrated by the well, with the stratigraphic section in the region of the Santa l
Maria Valley, and that those data preclude a correlation between the well section and the stratigraphic section in the Western Transverse Rangec and Santa Barbara Channel region 50 to 100 km to the south. This in turn indicates that large strike-slip movement, which would of necessity have resulted in moving a section from an original position many miles south of the Oceano well site to the present site of the well, cannot have oc-curred along the Hosgri fault.
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Interrogatory No.13 Do you possess or are you aware of any trace element studies or data relating in any way to the non-marine red beds near Breaker Point? If so, for each such report, study, piece of data, or other item of information, please state the following:
(a) The identi:y and professional qualifications of the persons who conducted the study and/or gathered the data; (b) The dates during which the study was conducted and/or the data was gathered; (c) The type of data that supports the study and/or the type of data itself (e.g. ,
radiometric dating, rock samples, etc.); j (d) A detailed explanation of the findings of the study and/or the age determina-tions such data supports.
Besponse 1 No. l 1
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l 12ter:ogatory No.14 l Do you possess or are you aware of any studies, reports, data or other informa-tion relating in any way to the age of the volcanic rocks in the Lospe formation south of Point Sal and/or in the Lospe formation north of Su Simeon? If so, for each such re- l port, study, piece of data, or other item of information, please state the following J
(a) The identity and professional qualifications of tha persons who conducted the study and/or gathered the data; (b) The dates during which the study was conducted and/or the data was gathered; (c) The type of data that supports the study and/or the type of data itself (e.g. ,
radiometric dating, rock samples, etc.);
(d) A detailed explanation of the findings of the study and/or the age determina-tions such data supports.
R esponse The volcanic rocks in the Lospe Formation south of Point Sal are described in '
USGS Professional Paper 222, " Geology and Paleontology, Santa Maria District, Call-fornia", by Woo &' 3g and Bramlette. The Lospe Formation is assigned a cluestioned l age of Mioceno(' n ;; them, on the basis of its presumed equivalence with the Sespe Formation of tL 'anta Ynez Mountains and its stratigraphic position between " Igneous rocks of the Franciscan Formation" and the Miocene Point Sal Formation. Woodring and Bramlette describe the associated hard white tuff as forming " beds" and '1enses",
l implying a sedimentary mode of deposition of these rocks and therefore a contempor-l aneous age with the Lospe Formation.
Fleid checking by D. H. l'Tamilton of Earth Sciences Associates, Inc. has shown j that geologic relationships betwe6 the tuff and the enclosing Lospe sandstone are in-l dicative of a shallow intrusive mdde of emplacement of the tuff, rather than a depost-tional one. This opens the possiljility that the tuff is somewhat younger than the Lospe sandstone. However, no actual age for either the Lospe Formation or the associated tuff is known to us.
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I Interrogatory No.15 Do you possess or are you aware of any studies, reports, data or other informa-tion relating in any way to the age of the tertiary shale beds (Monterrey rocks and younger) both north of San Simeon and south of Point Sal? If so, for each such report, study, piece of data, or other item of information, please state the following:
(a) The identity and professional qualifications of the persons who conducted the study and/or gathered the data; (b) The dates during which the study was conducted and/or the data was gathered; (c) The type of data that supports the study and/or the type of data itself (e.g. ,
radiometric dating, rock samples, etc.);
(d) A detailed explanation of the findings of the study and/or the age determina-tions such data supports.
R esponse
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Our sources of information regarding the age of the " tertiary shale beds (Mon-terrey rocks and younger)' north of San Simeon and south of Point Sal consist of the following: l
- 1) San Simeon area: Data regarding the age of the presumed Monterey Forma-i tion equivalent rocks in this region are contained in the same three sources referenced in our response to your Interrogatory No.11 The Earth Sciences Associates, Inc. and apparently also the Hall, maps and reports, base the assignment of a Miocene age to the rocks on their presumed correlation, based on distinctive lithologic character, with the Monterey Formation.
- 2) Point Sal area: Data regarding the age of the lower, middle, and upper mem-bers of the Monterey Formaticn in the vicinity of Point Sal are given in USGS Professional Paper 111, "Goology and Paleontology, Santa Maria District, California", by Woodring and Bramlette. On the basis of paleontological data, Woodring and Bramlette make the I
following age assignments for the Monterey Formation:
- lower member; Luistan and upper Relizian stage (Middle Miocene).
- middle member; lower Mohnian (early late Miocene) (from the eastern
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Purlslma Hills). l
- upper member; upper Mohnian (middle late Miocene), (from the eastern Puristma Hills).
a) W. P. Woodring and M. N. .Bramlette were geologists with the U. S.
Geological Survey. !
b) Fleid work upon which USGS Professional Paper 222 was based was done in the time interval of 1938-1940.
c) The part of their study that led to age assignments consisted of paleon-tological and micropaleontological determinations on fossils obtained from rock samples. 1 1
d) The results developed by Woodring and Bramlette are consistent with age determinations of the Monterey Formation and equivalent geologic units locatod through-out much of the length of the California coastal region, both offshore and onshore. Thus, l It is possible to demonstrate that rocks of the Monterey Formation from both nearby, i
and also widely separated points, are of the same general age. This is a fundamental l principle of stratigraphic correlation, and It seldom has any direct implications regard-ing possible fault dislocation of rocks in one area from those In another area, especially in the case of a rock unit as widely distributed as the Monterey Formation.
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s 4 Interrogatory No.16 Do you possess or are you aware of any studies, reports, data or other informa-tion relating in any way to the Lospe formation at Brown Road in the Point Sal area? If so, for each such report, study, piece of data, or other item of information, please state the following:
(a) The identity and professional qualifications of the persons who conducted the study and/or gathered the datt; (b) The dates during which the study was conducted and/or the data was gathered; (c) The type of data that supports the study and/or the type of data itself (e.g. ,
radiometric dating, rock samples, etc.);
(d) A detahed explanation of the findings of the study and/or the age determina-tions such data supports.
R esponse Exposures of Lospe Formation conglomerate, sandstone, and siltstone from the Corral!tas Canyon area, through which Brown Road passes, are described in U.S.G.S.
Professional Paper 222, by Woodring and Bramlette. Other parts of this Interrogatory are answered in our response to your Interrogatory No.14.
Interrogatory No.17 Have you compared the lithologies in the Brown Road Lospe formation with simi-lar rocks near Breaker Point in San Luis County? If so, please furnish a detailed ex-planation of the results of such comparison.
Response
Our geologic consultant has not collected samples from the Lospe Formation ex-posures north of Point Sal Ridge, including those along Brown Road. From the descrip-tion of Lospe Formation rocks given in U.S.G.S. Professional Paper 222, together with reconnaissance visual observations, it is our consultant's opinion that the Lospe of the Brown Road area, in common with the Lospe exposed along and near the coast in the vi-cinity of Lions Head, only locally and superficially resembles the sedimentary breccia exposed near Breaker Point. The main elements of similarity art the included clasts of locally derived rock types, especially the iron-rich, reddish weathering ophiolite-de-rived clasts, and thelocally coarse bouldery character of both the Lospe and the Breaker Point area bio cla. Notable efferences include the absence of the sandstone-siltstone member that makesupthegreaterpart of the Point Sal area Lospe at the Dresker Point locale, and the character of the matrix fraction of the conglomerates and breccias. The matrix of the Point Sal Lospe has been observed to consist of grayish sand, while that of the Breaker Point area breccias is mostly a microbreccia, with angularity and lithology that is similar to the coarser fraction.
I declare, under penalty of perjury, that the foregoing answers to Interrogatories 5 through 17 are true and correct to the best of my knowledge, information, and belief.
Dated May 17,1977, b 7 YY&s Douglas H. Hamilton ws ma----- n--an--
1 TNITED STATES OF AMERICA NUCLEAR REGULATORY COMMISSION In the Matter of )
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PACIFIC GAS AND ELECTRIC COMPANY ) Docket Nos. 50-275-OL
) 50-323-OL Units 1 and 2 )
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Diablo Canyon Site )
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CERTIFICATE OF SERVICE The foregoing document (s) of Pacific Gas and Electric Company has (have) been served today on the following by deposit in the United States mail, properly stamped and addressed: l Mrs. Elizabeth E. Apfelberg Mr. John J. Forster 1415 Cazadero C/o Mr. Gordon Silver San Luis Obispo, California 93401 5055 Radford Avenue North Hollywood, California 91607 James R. Tourtellotte, Esq.
Office of Executive Legal Director Director BETH 042 Division of Reactor Licensing U. S. Nuclear Regulatory Commission U. S. Nuclear Regulatory Commission Washington, D. C. 20555 Washington, D. C. 20555 1
Elizabeth S. Bowers, Esq. Chairman Chairman Atomic Safety and Licensing Atomic Safety and Licensing Board Board Panel U. S. Nuclear Regulatory Commission U. S. Nuclear Regulatory Commission Washington, D. C. 20555 Washington, D. C. 20555 Mr. Glenn O. Bright Dr. William E. Martin Atomic Safety and Licensing Board Atomic Safety and Licensing Board !
U. S. Nuclear Regulatory Commission Senior Ecologist j Washington, D. C. 20555 Battelle Memorial Institute Columbus, Ohio 43201 ;
Mr. Williaia P. Cornwell P. O. Box 453 Alan S. Rosenthal, Esq.
Morro Bay, California 93442 Chairman t Atomic Safety and Licensing l Mr. Frederick Eissler Appeal Panel Scenic Shoreline Preservation U. S. Nuclear Regulatory Commission Conference, Inc. Washington, D. C. 20555 4623 More Mesa Drive i Santa Barbara, California 93110 Secretary U. S. Nuclear Regulatory Commission j Mrs. Raye Fleming Washington, D. C. 20555 1746 Chorro Street i San Luis Obispo, California 93401 Attn.: Docketing and Service Section j l
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Mrs. Sandra A. Silver .
5055 Radford Avenue )
North Hollywood, California 91607 i I
Andrew Skaff, Esq. J Counsel '
Public Utilities Commission of the State of California 5066 State Building San Francisco, California 94102 l Brent N. Rushforth, Esq.
James A. Geocaris, Esq.
Center for Law in the Public Interest 10203 Santa Monica Boulevard Los Angeles, California 90067 Arthur C. Gehr, Esq.
I Snell & Wilmer 3100 Valley Center Phoenix, Arizona 85073 Bruce llorton, Esq.
3216 North Third Street Suite 202 Phoenix, Arizona 85012 l
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- p P l'Ip A. Crdne, Jr.
Attornoy Paciric as and Eleqtric Company
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l Dated: May 18, 1977 i
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