ML020300136

Part 18 of 22, Diablo Canyon Independent Spent Fuel Storage Installation, Submittal of Non-Proprietary Calculation Packages, Attachment a to Calculation 52.27.100.731, Revision 0

ML020300136
Person / Time
Site:	Diablo Canyon
Issue date:	12/21/2001
From:	Womack L F Pacific Gas & Electric Co
To:	Document Control Desk, Office of Nuclear Material Safety and Safeguards, Office of Nuclear Reactor Regulation
References
+sispmjr200505, -RFPFR, DIL-01-004 52.27.100.731, Rev 0
Download: ML020300136 (53)

Text

Calculation 52.27.100.731, Rev. 0, Attachment A, Page 13f- of 185 Table 21-7. Comparison of seismic wave velocities in the ISFSI study area and at the DCPP power block Depth Interval ISFSI Site Power Block Site (Feet) Refraction Velocities Refraction Velocities Compressive Wave (Vp) (1) Compressive Wave (Vp) o (feet/second) (feet/second) 5-50 2700-6500 2350-5700 Suspension Velocities Downhole Velocities Compressive Wave (Vp) (2) Compressive Wave (Vp) (3) (feet/second) (feet/second) 5-50 4500-9100 2450-9800 50-200 7300-12700 5690-15000 Suspension Velocities Downhole Velocities Shear Wave (Vs) (2) Shear Wave (Vs) (4) (feet/second) (feet/second) 10-30 3400-4800 2200-4400 30-150 3100-5400 2600-5400 (1) Velocities reported for rock below thin soil layer or surface disturbed zone (John A. Blume & Associates, 1968) (2) Averaged from WLA 1998 borings (3) Averaged from 1967 and 1977 borings DDH- I through 4 and DDH-A through D (URS/John A. Blume & Associates, 1977) (4) LTSP envelope (PG&E, 1988)GEO.DCPP.01.21 Rev. 2 Page 133 of 181 December 14, 2001 Ciahmars 52.2.1O731, 1kv 0, Mlthac sent A, Pope IS Sat I Explanation EH Artiificia fill (engineered), only major fills shown Quaternary landslide deposits ole N Volcanic rock (middle Miocene), dlabaso Intusive sills and dikes d Oblepo Formation (lower and mddIe Miocene) -bedded dolomitic sandstone, slttstone, and Odaystorte withA~e bedls, locally calcareous, Scene celict and MemberT -Sandstone and dodtes [W~J Unit a -diatomnaceous Stations and tufflaceOUs Sandstone; yellow brown to tan; thik to massive bedding ( To Uni b -dolomite, dolomtc Ststons, dolaomitc sntcne and sandstone, 47 medlumt to very thlck bedding Unit c- shale, claystore and silthtone, thin to MedIum bedding 40 aextensK~iy sheared X 6 '18 T [E Member Tor -Volcanic rock, zeclttzed and slllcifled tuff -Bedrockl mft or shear zoe, dashed where" "room ,qued, where unceran, arrows show sense of dl " Glcemoft Geologic c ontact Sold line whore well-defined, dashed where approximate, queried and'or dotted where uncertain Tofb' Out or fillslope S(nine landslides.

Arrows Indicate direction of movement, , ,,= ,rm derfna head scarp. (Smaller ladldoes art, not shown) "4 500-kV tower 10 Generalized strike and dip of bedding Parasitic folds on south limb of Pismo syncllne AltS of anticlnO, Plunge indicated by largr arrow, deahed where located Axis of scyine., plunge ndicated by larger So she= where approxmtely located! :Adds of nmorocng.

Puinge Irdccaled by terter artw, dased where approzdrntely located /. LSteep sea cliff W5 Stike and dip of fault r Spring Note: Ecpt for smail fals at and near te ISFSI site only rajor geologic structures a3d bedro k unt -brg, lmslides, are shown. 0 2W Fe.t getst Base Maps: PG&E CM1 Sfte Facililes Layout Plan (modiied 1994) Tbpography finm PG&E. lIeM (and later rnvwlkfls), Plot plej 471124 DIABLO CANYON ISFSI Geology modifled from: C.A. Hall, Jr., W.G. Ernest SW. Prior, and J.W Sloe, 1979, Geologlc map FIGURE 21-1 ofte San Luls Oblepo-Ssn ShTon remle, U.S. Gedolrc Surey MtSaneGoO GC A F Inveswlgatlon 1-1097. GEOLOGIC MAP OF BEDROCK AND LANDSUDES IN THE PLANT SITE AREA CA. Hall Jr, 1973, GeOlgolc map of the Moro Bay Soum and Port SWn Luls Quadrangee.

San Luis Oblspo County, CaMnla, U.S. Geological Survey Mlscizlaneous Reld Studies Map MF-51 1, scale 1:24.0D. GEO.pR01.21 REV 2 T) ae 134 of 181 D e r, 2001 Calculation 52.27.100.731, Rev. 0, Attachment A, Page JIL of 185 Southeastward aerial view of the ISFSI study area. The photo shows the exploratory test trenches excavated within, and above, the ISFSI. Hummocky ground and bowl-shaped depressions in the south wall of Diablo Canyon, east of the ISFSI study area, are large, old landslides.

In contrast, laterally continuous beds of sandstone and dolomite visible on the west slope of the ridge to the south of the ISFSI study area are undisturbed and demonstrate the absence of large scale landslides in this area. Photo Roll JLB AR-1.Decmber, 2001 GEO.DOPRP1.21 REV2 Page 135 of 181 coQýDIABLO CANYON ISFSI FIGURE 21-2 AERIAL VIEW OFTHE ISFSI STUDY AREA AztZtZ ---arr --24 I)icb/o ye.V-o 0 w octn, ara Ldocn.=IA

= t flrr rWýh ~ ~ tS, h Explanation tv , -.Cd topm NO1e kb b. trim alb Mo t). ~f-Biule bd a t f nt e Y- -I r 02 rutrd a ,@*t a B'eDrV ýN tý. H WWln fl m SF3 kseign, DIABLO CANYON ISFSI FIGURE 21-3 GEOLOGIC MAP OFThE IPSM STUDY AREA AND TRANSPORT ROUTE VICINITY Page 136 of 181 2 I I I I C I 507h Gob& ý. ý Arýla M {enlnord)

OaeNwdeos-llvrdedfo, A-7 0arid ass 0b4#o Fnwdon ---) Mentor Tb?. UFt b -delaTlits, dtt slcn. dofrfl sandstone, and sandstone.

medkmn to if bedded. Member To. o shala. and sfltsto.ie.

thi to medbrn teared. MelTiberTo, votat rock, zolltked arid aloifled hit Cdl 4 IL Explanation sp01a&nss quew e wher Fat ~sed oree~rcfr~fe Cetds # Aids dOted who.. Aids Cl SotoUne, larger maya tOYS dashed wtiere a mrote-MsdncIkie, larger dashed where 02 B.jde~ds4sýe o~lorrs W, ik an~dldp0*fauft S10sn d dbd b O5 &.dmebeedh HOSW kozrnibodi NOTWZ m.b.a. toetdsrnff tnwosllt,.f

--Caporailon bed INC. 14400-SCM.

PG pti IgNeerm. t240-.aIePG&E

-S!d (4)Ihe 2000-2c01;t:ooo inLIIV$I flies. ngo no adtoenhttrn border d rm*ered to Stai. sysarn. Som, of tie fl'51 'Wed abon -,ec.k'ed flE OSM'krienl wider at dated as. POSE 2001b).+ + +Borin ro. 197 poe blo 1977 toting tt-D at ~ttr Botg *0 elisHLA ari HML "I.le Botg to ISra' Wivsgats, WLA 'e to 200 a B-Oeg.l ~. soýGOEQDPP.O1.21 REV2 Page 136 of 181 wJ.I I I I t 2, I DIABLO CANYON ISFSI FIGURE 21-3 GEOLOGIC MAP OF ThE ISFSI STUDY ARMA ANDTRANSPORIT ROUTE VICINITY (I C) (/

-bi Siteof )V -/16ed1/4°

• 45,,.."di ata, ,= ISF$1

• s CT/ Sit I. -E Tofi,..i / 4* -S. , ,v . T-12 T-5 x "--T--- T-13 O.Colluvium CIculailon 5=l7.1O0.73t 1rr. 0, AfttcnheuttA, paleum of 1.s EXPLANATION

_ N 63,000 QUtrn Marine terrace deposit (overlain by Qoc) Oblepo Fornation (lower and middle Miocene) DOLOMITE UNIT Dolomite, olce dolomite, dolomitic sfihetn to fine-grainod dolomite Tfild wsandstone, e imestone.

The unit contains occasional discontinuous to contnuous (tens to hundreds of feet) day beds that are generlly 1/22 to 1/2-=nh thld, but localy are thicker. Rocks in this unit are moderately toweOlcoernted, moderstely hard to hard, moderately to sfy weat , brittle and typically medium strong. TFriable dolomite and dolomitid siltione of unitTofb.1.

These rcksatvpically have low hardness, are very weak to week, and occur as discontlnuous zones where wea.tring and/or altertilon has been concentrated.

Inferred lateral extent of friable zones is schematic.

SANDSTONE UNIT S] Fine to coarse-gralned dolomitic sandstone and sandstone (arkoslc to amrntlC) wiNth lseer dolomlts beo. Dett clasts are =oosed primarily of dolombtized faldopars, marine fossil fragments, and voicanic rook fragIm=,t Discontinuous clay beds tat are generally lees than 1/2-inch t occur locally within the unit. The romks are of low to medium hardness, moderately to well cemented and typically medium strong. T boa Friable sandstone of unit Tofb.2. These rocks tyically are of law hardness are very weak to weak and occur as disconi nuous zones where weathering and/or alteration has been concentrated.

Inferred lateral extent of fIable zones Is schematic.

Strike and dip of bedding 80 DB Minor fault, dip Indicated, dashed where Inferred, queried where uncertain, arrows show relative sense of dJppocement, U-upthrown, D-downthrown Small, secondr faults expsed in traenY Tý-ý Explorato trench, number I ncatod DS-1/ Disoomity surwy Une In bulldozer cut Footporint of 500-Iv tower Clay bed, thickness indicated 1/1l .--N Maw0 Geologic contact, solid line where well-defined, dashed where approtirmate 01-C A Boring for ISFSI, number Indicated initial number is year drilled, e.g. 01 was drilled in 2001) Geologic cross section, arrows Indicate end of line Is off the map area YCutsk¶)e above and fill prisnm )x wet 0 SF31 pads N /----AkIs of anidine, I r show plunge, d.ada~e where approximate Ahms o inne, =r rarrow where apprornimate

• L Axis of monooline, larger -. arrow shows plunge, dashed "where approximate Q5krr -r Buried shorlline of marine terrace wawt-c nrm, number 29~s and elevation Inicne Note: ISFS1 geomet is based on PG&E Enercon Drwg. Base map from No. PGE-r09-sk-001 dated 9/27101.

Geology not shown in paved area and reservoir area.0 W0 Igo Iq0 2l0 C n5)DIABLO CANYON ISFSI FIGURE 21-4 GEOLOGIC MAP OF ISFSI AND CTF SITES E I E I,IQ,0O0 Calculation 52.27.100.731, Rev. 0, Attachment A, Prge. of 185 Large-Scale View]Small-Scale Vi(T 10 ISFSI S Pads Stratigraphics Level n E 02 0 Power SBlock Stratigraphic Level T 50' ISFSI ads grade (10 ) (part of pads are on Tohfb.1 because strata are offset by bedrOCk faults) el, 310 feet E 0.0 C C = 0) C C0 t C 00 Tofb STofb-2a ( TOfb.2e Clay GE DIABLO CANYON ISFSI FIGURE 21-5 "NERALIZED STRATIGRAPHIC COLUMN AT THE ISFSI AND POWER BLOCK SITES tf ')1 Oa;/ 0 December, 2001 Page 138 of 181 Explanation (Informal subunits of unit Totb of Obispo Formation)

DOLOMITE SUBUNIT Dolomite, clayey dolomite, dolomite siltstone to fine-grained dolomigc sandstone, and limestone.

The unit contains occasional discontnuous to continuous (tens to hundreds of feet) clay beds that are generally 1/32-0 1/2-inch thick, but locally are thicker. Rocks in this unit are moderately to well cemented, moderately hard to hard, moderately to slightly weathered, butte and typically medium strong. Friable dolomitte and dolomitic siltstone of unit Tofbr-i These rocks typically have low hardness, are very weak to weak, and occur as discontinuous zones where weathering and/or alteration has been concentrated.

Inferred lateral extent of friable zones is schematic.

SANDSTONE SUBUNIT r-l Fine to coarse- rained dolomite sandstone I Toj~.2 Iand sandstone (arksie to arenitie) wviti lesser dolomite beds. Detrital clasts are composed primarily of dotomitized feldspars, marine fossil fragments, and volcanic rock fragments.

Discontinuous clay beds that are generally less than 1/2,inch thick occur locally within the unit. The rocks are of low to medium hardness, moderately to well cemented and typically medium strong. -lFriable sandstone of unitTofb-2.

These rocks typically are of low hardness and are very weak to weak, and occur as discontinuous zones where weathering and/or aiteration has been concentrated.

Inferred lateral extent of trable zones is schematic.

? --- Clay bed; silty and sandy, tan to brown, some angular fragments within clay matrix, locally contains foraminifera, enerally thin (1/16 to 112 inch). Cla geds more common and more aterally continuous in dolomite unit than in the sandstone unit.

Calmlad 527.1Q.73,lrAv.A0,AftehnbtAPAfe stiof1 Explanation 1966 (and later) TovwiI Corporation plant property topographic map, 1=200- scale, 10' contour interval 1998-2001 ISFSI Map, 1 6=50- scale, 1' to 5- contour Interval 1968-1990's (vai'ous)-DCPP 20 Scale CMI Topographlc drawings, V=20- scale, 5-10' contour interval.

Shadng denotes area within map covered by topographic data used for the 1SF81 project ('o7 GEO.DCPR01.21 REV2 Deosnb, 2001 Pate 139 of I RI DIABLO CANYON ISFSI FIGURE 21-6 INDEX MAP OFTOPOGRAPHIC SURVEYS

SI.27.100.731, Rev. 0, Attieut A, wANPPIL of 185 NORTHEAST SOUTHWEST o Original marine deposition showing original lateral continuity of bedding (22 to 14 million years ago) N SDolomitization of the marine sequence and invasIon of petroliferous fluids. (22 to 14 million years ago) NO

• Diabase Intrusion, hydrothermal afteration and localized deformation (18 to 12 million years ago) NO (Tectonic deformation including folding and faulting.

(12 to 2 million years ago)ORTHEAST SOUTHWEST NORTHEAST SOUTHWEST Explanation

• Surface weathering and erosion (1 million years ago to present)Fl rii Wi NORTHEAST ORTHEAST SOUTHWEST SOUTHWEST Surface weathering i Limestone f Siltstone 7 2 Sandstone

-Clay SDolomitlzatlon a 10m%D Petroliferous zone 1 Localized friablelaltered zone Dlabase intrusion EL Hydrothermal alteration (Exca1 ton of borrow slope (1971)t SOUTHWEST 1,II Fault -sense of vertcal separation is indicated by arrows, and Interred horizontal dght-slip displacement by E, (moving away from viewer) and 0?1moving towardviewer).(oa'GEOM.DCPR01.21 REV 2 December, 2001 DIABLO CANYON ISFSI FIGURE 21-7 DIAGRAMMATIC CROSS SECTION ILLUSTRATING THE DEPOSITIONAL AND STRUCTURAL HISTORY OFTHE ISFSI STUDY AREA Calculation 52.27.100.731, Rev. 0, Attachment A, Page j2, of 185 pu L.X-) Q 0 15.+/- CL Cu 0 0 20 0) 0 U-GEO.DCPP.01.21 REV 2 Page 141 of 181 Clb S. Cud"0)Present Co 0 ,00 00 DIABLO CANYON ISFSI FIGURE 21-8 CHRONOLOGY OF STRATIGRAPHY AND GEOLOGIC PROCESSES ATTHE ISFSI STUDY AREA uecemuer, euu I BORING 01-1 -A^Calculation 52.27.100.731, Rev. 0, Attachment A, Page 1[3of185 BORING 98BA-1 TOR 5190/.0 -372' TOW Ooloml e m0 Sa 10.96-2 04.VS'iP 1.250.09I TD0250.01It.

2 91 52-0 40 80 -100 -120 -1400 -180 .200 -220 -240 -250 BORING OOBA-1 i it 372 352 -332 -312 -292 -272 -152 -232 -212 -192 -172 -152 -132 -123 0 m09 tTOH ,ee .0@450' 004 OP-13 sP-2 LIC0-1-10

+ DS-1-1 SUC1-11 -I20 U UC-1-12 6,6450W'.

14SW .1-t-2 b .S-I-3 ,N550W'. 10-SW -40 + 4 6b, NOSOW, S'VS 1 UC.1-14 + DS-I-18 od11-2'W,11M.16'S,8.4-"bWd 0 6'. N4'W. t6'SW Tolb-I 9 olomite X-o- b St.16'NW -80 TX-21-58 +DS-1-6 D -100

• TX-1-16 d Mr 18"SW(?) O- -7X'" -120 Tofb-I "ol 1-7 P'3 UC-I-6g150 TD 150.0 ft.BORING 01-F A-450 -430 -410 *370 *350 -330 300 1 .00-30 it otST401.

5O TOO 19 ..01102. E-W,4". 1/4-1I"IhSO 1110160 26055 il- N70'WN 60-12'SW.

0.4"01001k T-31 00' 05-33 TO130.5 1.-0 390.6 20 -o370.6 350.6 ~40j 335.6 -310.6 -10 20.6 -120 2270.6 -130.6 265.1 Tofo-, 5900m01e TO1 2 Tolo,-I0020490 TOt-2 T"ol Dolk~P23 *la. N54WE. 14WK 0.8" thlck SUC-42 D S-41A D S-410 NSO1 E.1311N0 1I4.M12 thick b, bd. N15E. 15-W .$OS408 bd. NI5¢E, 14'W .bs, N45WE. 3 NV La N1'W I '12-4 1.2" thick bed a, N1 2-E, 3'S, .,;4-1/"lhthik .D-1B ,0 -3M bd, N65E, 12'-18'NW bd, N20'E, 12'NV N15E. 11lw 60. N309E,.10-51 -cla 50000ds, M.E. 12'-14° 0.4 and 0.8 thic -bd, N2E,OE 12°NV cla., N4WE, 29W. 1" thick bed -Cla. 0.4" thick -c1, N 17'3. 13'S 14-1/4-12'thk

b. -b. N45'W., 10ý-3 -60. N12'W. 12-W-b1. N33-E, cla, N620E. 18 1 4-,'2"thick be r12-W TO =21.0 IL TOH "0 -.5.9, 40 526.9 5n -S2.9 N ed --.9 520 4M.9 W 42. 4N. V3 2O -W M.9 W, -266 5489s~ ýN. -220 426.9 I W -3OO-2. 3N.9 3-W M3o -4.9 1 4 350 2408 ,21 245.9DP-x "* UC-x " Tx-x + DS-x cla, N22*W, 25"S, 1/2" bd, N61"W, 16-S ii B Explanation Petrographic sample location Unconfined test sample location Triaxial test sample location Direct shear test sample location Clay bed, with strike, dip, and thickness (where known) (Table 21-3) Bedding, with strike, dip, and thickness (where known) (Table 21-1) Friable (weak) dolomite or sandstone zones Percent recovery of core run Rock Quality Designation (Deere, and Miller, 1966) of core run; length of recovered intact core over 4 inches divided by length of core run. Low RQD is indicative of closely spaced joints, high RQD is indicative of moderate to widely spaced joints.0 M 40 W W lw im Wý0 WIN0 0 S20 140. W8 WO 140-December, 2001 Page 142 of 181 GEO.DCPP01.21 REV 2 DIABLO CANYON ISFSI FIGURE 21-9

SUMMARY

LOGS OF BORINGS ON SLOPE ABOVE ISFSI SITE Note:1. Explanation is general. Not all features apply to every boring. Note: 2. Only those claybeds that are greater than 1/4" thick are shown Note: 3. Coring began 1to 3' below grade level to allow for installation of borehole casing.Sand-t-4=-I Calculation 52.27.100.731, Rev. 0, Attachment A, Page -ft of 185 BORING 01-H BORING 01CTF-A BORING OOBA-3 BORING 01-A BORING 01-B 0 20 0 05o 100 O 909186 TOH 0 elev. @306.1' 10bN53-W.

6 0 SW(?) C UC-15 S20b N88 °E, 7'S(?) 20 P-14 "a P-21 30 Tof-2 el.-26 o Sandstone S÷ -DS-34 50- PTX-16 -TX-17 TD 58.6 ft.13-0-20 -40 r- 306.1 909so 100TOH ev. @ 306' 006 20 BOH .. 275 LUee TD 30.0 f.-286.1 -286.1%'-0 -306 20 -286 30 276 41-58.6 L 2 4 7.5 TOH elev. 0 305.7' SISFSI PadLs Subrade e .302 t S.-cla, N69-E, 7-N, 1/2-1" thick bed -cIa. N11IW. 22oW. 1/4-1/2"thick bed 6-bd. N14N.11 -W TD 71.8 ft.-0 20 305.7 285.7 265.7 40-60 V 245.7 Toib-2 Sandstone (DP-6 ISF01 Pad. Sobc~d. U UC-IS -bd, NIO-W,1OSW 1?)

• UC-19 D DS.20 TD 72.0 ft.-0 40 .0 72.0-318.9 -298.9 -278.9 -258.9 -246.9 40 60-80 190-0 50 o100 b Dolomite Tolb*2 Saedstone To7-2 sandsone Tofb- Dolomite Saodstowe TOO elov, 0 346.6' -tP-22 -UC-11-bd. N30W. 15*SW ISFSI Pads Subgrade Bas6 of cut slope el. 3106It2 *UC-12 STX- 13 "Lbd. N59°W. 13-SW bd. N674W, 11I-SW +DS-35 TD 101.0 I-71.8.'-234.7 Explanation

& P-x "* UC-x "* Tx-x + DS-x cla, N22"W, 25"S, 1/2" bd, N61"W, 16"S I Petrographic sample location Unconfined test sample location Triaxial test sample location Direct shear test sample location Clay bed, with strike, dip, and thickness (where known) (Table 21-3) Bedding, with strike, dip, and thickness (where known) (Table 21-1) Friable (weak) dolomite or sandstone zones Percent recovery of core run Rock Quality Designation (Deere, and Miller, 1966) of core run; length of recovered intact core over.4 inches divided by length of core run. Low RQD is indicative of closely spaced joints, high RQD is indicative of moderate to widely spaced joints.Note:1. Explanation is general. Not all features apply to every boring. Note: 2. Onythose claybeds that are greater than 1/4" thick are shown Note: 3. Coring began 1 to 3' below grade level to allow for installation of borehole casing. DIABLO CANYON ISFSI FIGURE 21-10

SUMMARY

LOGS OF BORINGS NEAR SOUTHWEST END OF ISFSl SITE GEO.DCPP.01.21 REV 2 December, 2001 Page 143 of 181-0 40 -60"--80 -- 10l-346.6 -326.6 --356.6 "-286.6 -266.6

• 246.6 245.6ýl 00 11 BORING 01-A BORING 01-B BORING 01-C Calculation 52.27.100.731, Rev. 0, Attachment A, Page 14 of 185 BORING 01-D 0--cla. N69-E, 7NE, 1/2-1" thick bed -cla, NN11°W, 22°W. 1/4-1/2 hick bed -6d. N14°W,11'W

-0 20 40 60 L 71.V-305.7 2a5.7 265.7 245.7 233.9 2040-60 79-01s so 100 I",Ie Tolb-2 Sandstone To M.318.9' lop., I6F81 Pads Submde uc.8 el. 302It., -bd, N20'W.tOOSW

(?) O SC-t2 + 00-20 o 50 100 0+-__.-,-20 60 -72.0 318.9 298.9 278.9 258.9 -246.9 20 40 60]u TOH ele. @0 323.0'Tofb-2 S.lndone* Tx'21 Fbd, N73°W,15S ISFSI Pads u edc *UC-22+DS-23 +DS-24 020 a. 40.TD 67,0 ft.60 -67 323,0 303.0 2 L 283.0 263.0 256 00 00100 0 Tol h 20 40 Tol )-2 60 Tof h--I 1986-2 4ot TOH elev.@0 325.2'P-1 SFSI Pads Subgrade UC-4 l302 *TX-5 UC-6 6x4. N33oW.11=NE TD 6.56ft.BORING 98BA-3 BORING 98BA-2 BORING 01-E BORING 01-G TOH eev. m0 -322.0 Not Logged: Refer to log for adjacent boring 68BA-2 0 0I0O 0 :20 -i Tc -' S., San *0 640 60-,;o-2 clone 0 TD 220.00ft.0 40 80 -100 "-120 "-140 -160 180 -200 220 Boring 98BA-3 rapidly drilled to el.157' next to 9BA-2 without sampling.

then cored to el. 102' to continue sampling of rock.r322 -302 -282 -262 -242 -222 -202 -182-162 0 00160 10 20-Too-1 Tofb-2 Sandslone TOH ee. 0 -322' ISF:SI Pads Subrade I@ P-5 TD 165.05ft.0 20 40 60 60 322 302 282 -262 20 c 40 60 80 o soo100 D D Tol Dot, TOH ela. @337.6'Toitb2 Sandsto'e TD 9; UC-26 ]SFI Pds Subrde " *Tx-27 bd NS 6E b b4 N , 100W,(3) .UC-28 6.W 0 q P-1 0 D)81.0 ti,-0 40 -60 81 r-337.6-317.6 -297.6 -277.6 25716 256.6 k 242 100 -222 120 140-202 TOH ele0, 0316.81 ISFSI P.dsSu9. rde -bd, N22°W.13SW('?)

÷P-12 .uC.0 S -UC-10 TD 76.0 ft.Explanation o P-x Petrographic sample location "* UC-x Unconfined test sample location "* Tx-x Triaxial test sample location + DS-x Direct shear test sample location-182 cla, N22°W, 25*S, 1/2" 160 L'162 165 157 bd, N61'W, 16'S-142 Clay bed, with strike, dip, and thickness (where known) (Table 21-3) Bedding, with strike, dip, and thickness (where known) (Table 21-1)I Friable (weak) dolomite or sandstone zones 122-102 Percent recovery of core run I Rock Quality Designation (Deere, and Miller, 1966) of core runt length of recovered intact core over 4 inches divided by length of core run. Low RQD is indicative of closely spaced joints, high RQD is indicative of moderate to widely spaced joints.-0 40-2 1 76 316.8 296.8 276.8 256.8 240.6 Note:1. Explanation is general. Not all features apply to every boring. Note: 2. Only those claybeds that are greater than 1/4" thick are shown Note: 3. Coring began ito 3' below grade level to allow for installation of borehole casing. DIABLO CANYON ISFSI FIGURE 21-11

SUMMARY

LOGS OF BORINGS AT ISFSI SITE GEO.DCPR01.21 REV 2 December, 2001 Page 144 of 171 5o 1009 ele.0 C 0-20 60-325.2 -305.2 -25.2 -265.2--68.5 L-256.7 TD 72.0 ft.t f I ISFS[ Pads Sub0rade=-I=r 0 f BORING 01-G BORING 98BA-3 BORING 98BA-2 o000i00 TOH .t.0 0310.0' 00. Tolb-I h. -bd,0I.1 0 .os-0 P-12 ouc-9 00~ T010-2 ..01 S* O.stone T07600f0.ISFSI Pads S ubgmd, .1.3W2 ft. I 112-3/4" N22rW.137SW 0 31608 "20 296.8 "40. " 276,8 "60 256.8 70 240.8 IOH ele. 0 -322.0' ni Not Re0.r to log fora Id n bokV -2 0 "TD0220.00.t B-n9 958A-3 lop dly drilled to ,L.1507.nex1=t 0oA-2 without -nOprT.100018

01. 102 toano'. ,0then coued toe oo. t .-otnespli.g9of rok.0 40 -100 -120 -140 -160 -180 -2W0 -2200 322 -302 262 -242 -222 202 -142 122 102 TOH 1-I0. 0 -322' Do 4.~e ISFSPasoad4 9 P-5 Tno-2 Sandstone TO 165.00.L 20 100 -120 .I " 140 105-302 a-262 BORING 01-E TTO 2 el-v0@337.6' 0 o- .UC-26 10101 lISFSlTodM obo~de 0051,00l.N302 f.7 o0 Tx,27 bd. NS,%8E bd. N6V ., I CNW LIC-2bt 1-29 T.12 Sandstoo, TO 81.0 ft.0 -337.0 317.6 297.6 277.6 -s0 -257.6 a- 1 "256.6 1 a 0 -4 BORING 0 50 100 don. 0 A Tolf-2 Sands~tOe Tofb-, TO0-2 TO S .o 1 42 157 152 -102 *132 Explanation o P-x Petrographic sample location "* UC-x Unconfined test sample location "* Tx-x Triaxial test sample location + DS-x Direct shear test sample location cla, N22"W, 25"S, 1/2" Clay bed, with strike, dip, and thickness (where known) (Table 21-3) bd, N61rW, 16'S Bedding, with strike, dip, and thickness (where known) (Table 21-1) Friable (weak) dolomite or sandstone m zones SPercent recovery of core run Rock Quality Designation (Deere, and Miller, 1966) of core run; length of recovered intact core over 4 inches divided by length of core run. Low.RQD is indicative of closely spaced joints, high RQD is indicative of moderate to widely spaced joints.1 122 Calculation 52.27.100.731, Rev. 0, Attachment A, Page 141 of 185 BORING 98BA-1 OOBA-2 To3 0 s010 0 -0.37 Tolb-1 'OH 2 35 o 350' 20 W2 -0 350 0-40 332 N0 -330 -A00 312

• 10.2. -40 310 T: SUC0.2. 5 S0 ft. M No25 o Tolb-2 -IM 272 -120 252 10.Tofb-1-.140' 232 1wN160 212 "To0.-2 ola. 1l-dip. 1.20".NN 180 192 200 172 22 220 152 240,-240 132 T2-0250 122 TD 20001.0 Note:1. Explanation is general. Not all features apply to every boring. Note: 2. Onlythose.claybeds that are greater than 1/4" thick are shown Note: 3. Coring began 1 to 3 below grade level to allow for installation of borehole casing. DIABLO CANYON ISFSI FIGURE 21-12

SUMMARY

LOGS OF BORINGS NEAR EAST END OF ISFSI SITE GEO.DCPR01.21 REV 2 December, 2001 Page 145 of 171 I a40 Calcultiou52.2.100.73I,Re.OQ,AttcbmemA,Pqe.~ifiss Explanation Geology o-.f Artificial fill (engineared) lQdfi IGalo s' 'WI Quaternary deposts -alluvium (Qal), debris flow (Qdf) colluAum (Qc), landslide (01s), Holocene coliuvial fan (Qhf)E.Thtb-777 DOLOMITE SUBUNIT Dolomite, cias dolomite, dolomitic slitatone to fine-gralned dolomitic sandstone, an limestone, The unit contains occasional discontinuous to ocontinuous (tens to hundreds of feet) clay beds that ae generally 1/32 to 1o2-Inchn but local are thioker. Rocks in this unit are mderate 'A ~hard tohaitt mloderatelytos*flgty=

britte and typically medium strong. Fdable dolomite and dolomitic sittstne of unitTontb.

These rocks typically have low hardness, are very weak to weak, and occur as discontinuous zones where weathering and/or alteration has been concentrated.

Inferred lateral extent of friable zones Is schematic.

SANDSTONE SUBUNIT Fine to coase-gralned dolomitic sandstone and sandstone (arkoslc to arenItf) with lesser dolomite beds Detrital dasts ore a omlesd pWimaily of dolornitized feldspars, marine fossil fragments, and volno rock Discontinuous clay beds that Wre generally less than l/2-inc", r locally within the unit The rocks are of low to medium hardness, modertely to well cemented and typically medium strong. Fdabdo sandstone of nitTfb-2.

Tbese rocks WyoJl are of low hardness, are very weak to weak, and occur as zones whore weatod na and/or alteration has been concentrated.

Inferred lateral extent offable zones Is schematic.

Symbols SApparont dip of bedding Apparent dip of bedding measured in boring Bedding shown schemnatically and inferred from projection of nearby surface outcrops or borehole surveys ?---- Llthologlc contact, Inferred except where encountered in boreholes and surface mapping, queried where uncertain I'1/8' -- '-114' -_ >1/4V 01-H TD 30.5 tti Fault -location based on projection of french or surface exposure.

Verical projection is inrd. Di of huht assumed to be vertical unless well constrained by multiple surface Quoried where uncertahe.

Sense of vertical separation Is Indicated by a .and Inferred horizontal right-slip displacement by E) (moving away from % "ewer] and (moving toward viewer).

Clay, siety and sandy, tan to brown, some angular fragments within dlay matrix, locally contains foraminffereo generally thin (1/16 to12 Inch). Clay beds more common and more laterally continuous in dolomite unit than In the sandstone unit. Clay bed -weight of sold line Indicates bed thikness where ecountered in borings or trenches, dashed line where Interred (no thickness Indocated);

queried where unoertain, clay beds projected beyond boringe or trenches based on thickness

(>1/4-inch thick beds projected 100 feet as solid line and 100 feet as dashed line, 1/8-Inch to 1/4-inch thick beds projected 50 feet solid and 50 feet dashed, <1/8 inch thick beds projected 26 feet soid and 25 feet dashed) unless constrained to be shorter on aifoning boreholes and trenches.

E tkOaon mnmber (01-H, initial number indicates year drfied) and depth T- 0 fast)o intn T-1 8 Exploration trench, number Indicated; trenches aWe shown open If m they cross section line tilled if projected Into section line T Groundwater elevation and date of measurement indicated DIABLO CANYON ISFSI FIGURE 21-13 EXPLANATION FOR CROSS SECTIONS G~DGPO1.21REV2 14rbe, aco Opt Pleistocene colluvia]

fan O-pt-m-- Pleastocene marine terrace deposit (inferred)

T-vr'1 Volcanic rock (middle Miocene), diebase intni ve sills and dikes Obkipo Formation (lower and middle Mlocn.) SMember Tof, unit b -dolomite, dolomitlo siltstone, dolomitic sandstone and sandstone:

medium to thick bedding MemberTof, unit c -shale, tosne and siltstone, thin to medium bedding, extensively shearola Tar Member Tor -volcanic rock zeolitlzed and silicified tuff Pleistocene Marine Teroacos Designation

• 01 Oxygen Isotope Stage 6a marine terrace (80,000 years old) 02 Oxygen Isotope Stage 6e marine terrace (120,000 years old) 0 3 Oxygen Isotope Stage 7 marine terrace (210,000 years old) 04 Oxygen Isotope Stage 9 marine terrace (330,000 years old) 05 Oxygen Isotope Stage 11 marine terrace (430,000 years old)

• an r and .coxrat/on of marie terraces based mn K.L, Hansen, J.R. Was/big, r. Leals K I. Ks/son and L. Mozger, 1994. Correlation, ages, and uplift m a mymalne teWnace, , Aitemrn, LB., McMufier RB 0uf, LS., and SIfmnons, D.B, ed&, Selsmotaotohcis of the Cenh- Calrnila Cosat Rwangs: Boulder, Colorado, Geological Soclet' ofAmencas Special Paper 292.c'og GEOWDOPR01.21 RIEV2 December, 2001

.Calcual-inn 52-27-10073t, Rtv.0, AttathebnltA, PaelM4.of 85 A 21-4. Neaby bodns am' projýo~dt e s. ýc. 2. Sae Figure 21-13tr. 4atýadono gýoo ulta 3. Horýofs smde .veusial e.DIABLO CANYON ISFSI FIGURE 21-14 CROSS SECTION A-A'MO.DOPP.O121 RE2 Dwrnbe, 200 Page 147 of 181 I S I S S I I I 0 0 C I Caktdo.d 5.2%lf.731,Rv.

0, AttachmatA., Psie jtf 15 Note 1. L oanr of croms ec st wn on Figures 21-3 and 214. Nearby borings mr pM*cte to crms secion. 2.$8f Figure 21-13tfr elanation of geologi units. 3. Hoiona .cl = ý vetialscl GEODOPP.0l 21 REV 2 Page 148 of 181I B a Mo I iIW '0 -loG a C.DIABLO CANYON ISFSI FIGURE 21-15 CROSS SECTION B-Bu.December, Me0

---a kflIMdafiP Mt 185-H4 C Detaled ca~I andn21 Ncoas I. LocafloM of cros secton shw1, on Flgures 2"- and 214. Nearby borings ame pnjected t orams msoaon. 2. See Flugur21-13 tr wlanaflon ofgeaouc~

unit. & Hotizonal scal = nerkud scal I I S Page 149 of 181 DIABLO CANYON ISFSI FIGURE 21-16 CROSS SECTION C-C'Decenter, 2(ý CtkWatioU.52%10t.731, R.t OAtt~adim A., PazeAfA gle N 2 I, S (U Looacn f c~s eobn slnon on Figure 2.6-7 and 2,"-. NOW by ordns are prMte to cnoa secio. 2. See Figure 2.6-9 for e*qantbn df geologic unit. 3. Hou.lzonýa sa VdW WW~..GCU.L4RO1.UI.1 NLV 2 uecomes ý2(w Page 150a of 181 T D I I 0 25 50 15 '00-I I I DIABLO CANYON ISFSI FIGURE 21 -17Ta CROSS SECTION D-D' Cdek2log.1aýsl,kv

ý.Atmc~hmetAPazetffMo~

D I I 1. ~ ~ ý "oalno rs scoson Figures 21-S and 21-4. Nearby bWins are pitleotd o cross sectin. 2. See Rigure21-l3sr explwansn ol geolic units. 3. Hordzonal scale = rt~lo seale 0 fl 10 7S I I GEO.DCPP.Q1.21 REV2 Page 150b of 181 DIABLO CANYON ISFSI FIGURE 21-17b CROSS SECTION D-Din c/v Decembe,.

M~ ---*50a ..£nSh0. 21.Nary00 a rm,ýW= DIBO AYN SS 2. Se Fgum 1 -3 fo emtý In -. Iiaa 1 =1a ýFIGURE 21-18a CROSS SECTION E-E'Page 15l5aof 181 GEO.DCPP.01.21 REV 2 mb.,, MI cdetjnso 3.2100.731,Rev.

O,Attsci, t A, Page 1 9 f 18 E flo* E TOtb-I 0I CI Toth.11 0 $ C 13 IOh I 400j Notm 1. Location of cross section shown on Figures 21-3 end 21-4. Nearby borings are projected to o.ss section.

2, See Rgure 21-13 for explsnaeon of geoogic units. 3. Horizontal scale = vemcal scale DIABLO CANYON ISFSI FIGURE 21-18b CROSS SECTION E-E'GEO.DCPP.01.21 REV2 Page 151b of 181 Decembe, 2C01 TO.1, I.

Cakdmdatml7.21N.73L, Rev. 0, Attnumeudt A __A~l-b I-n "'4 a, _____________________________________________

'ii:0 -3/4 Is I _ _____ _____ SE --* I 1. Lntim of croesssedonshow on Figuel-ad 214. Nearby bonrlris .r. projectedW to 21s3 sectb 2. Sur Figure 21-I fo3 r explonauon of geoblogc unus. 3. fHorlm~taI

..le = M.1ca W~.lags 0h1 *.-T----I I -h I-I 0 -30 71 vel.s soe.GEQDCPP.o1.2I REV 2 Page 152a of 181 3-000-500-1 I j-=4- ,, It 0-/ I / mS..eI liE ft61 T-a 0-17 DIABLO CANYON ISFSI FIGURE 21-19a CROSS SECTION F-F'DOCatrnou Min Calculation 52.27.100.731, Rev. 0, Attachment A, Pagý5& of 185 F Tofb Toit L Tofb TOfb --- .1\_ _ _ -~ _ F. ..__\GEO.DCPP.0i.21 REV 2 December, 2001 -------.D.. ..m. ...........I I--50 -0 Page 152b of 181 Ovetook at end ofSea VieWw Rod is 10 f0-t to north Axis of anticline 02) LL c)I-I r I--. I I.DIABLO CANYON ISFSI FIGURE 21-19b CROSS SECTION F-F'[--750 -700 650 -550 -250 -200 -150 -100 Notes 1. Location of cross section shown on Figures 21-3 and 21-4. Nearby borings are projected to cross section.

2. See Figure 21-13 for explanation of geologic units. 3. Horizontal scale = vertical scale. 0 .0 75 10 °F, eet Scele Calculation 52.27.100.731, Rev. 0, Attachment A, 185 A S I :1 Co so, Ctc Oz LL >0 z 0 -.1 M i4 Z NZ 10 eUp tuJ 0 rC C El w C C 0 0 -Il 0) w Calculation 52.27.100.731, Rev. 0, Attachment A, PageV'$ of 185 0 'F (C>O z 0 40 00 14. m S C ae ozc oCPage 154 of 181 c*It~U~o ]En,. 0, Attachment ]Pagd_9 -÷- Wt.+ ___- ___ _'-____ __-__ _-__ _- ---____---____

__- ___ _....__ ___ _"_____ ___ _ hI S. ... .. _h a- --" I- ' C--- ----COSSSECIONI-I GTIMO0M21RV A.10r 20 Page 155 of 181 Calculation 52.27.100.731, Rev. 0, Attachment A, Pagel)_ of 185 In.aw 1 Notes 1. Loction of cross secton shown on Figures 21-3 and 21-4. Nearby borngs are projected to cross section.

2. See Figure 21-13 for eaqlanation of geologic units. 3, Horizortal scale = vertical scale GEO.DCpR3RO1.21 REV 2 Page 156 of 181 DIABLO CANYON ISFSI FIGURE 21-23 CROSS SECTION J-J'December, 2001 Cainfion SI.27.100.131, R v. 0, AbebmeutA, I I 1. ýo of cw saNoat. 1.Les~n f ros eeooshQv on Flgurus21-3 and 21-4. Nearby bcrings em pnojeoted to crs seotkw,.

2. See Fgure 21-13 or "~anaWtn Of geologic units S. Hoilte .1. = verflal ..Ile 0 iS 50 GEOJ.L&Rru.2I Rtv 2 Page 157 of 181 I I DIABLO CANYON ISFSI FIGURE 21-24 CROSS SECTION K-K'December.

M0 Calculation 52.27.100.731, Rev. 0, Attaclnnent A, Page of 185 0 0 Ft IL o 0 2 w 0 oO 4 o bO (DO) m 4 C, i U] C (N] 0 0L L 0 0 6 Lu 0 ____________________

_______ a V 0 (Nw 0= a 0 __________ 8 0 0 0 > 0'0 en 4 Os 04 it 0 0 0 __________________________ I -04 Calculation 52.27.100.731, Rev. 0, Attachment A, PageW'\ of 185;t b'4g 4.Geologist using Brunton compass to obtain a strike and dip measurement from a dolomite outcrop on the hillslope above, and south of, the ISFSI Pads. Photo roll JLB-2.GEO.DCPR01.21 REV 2 Page 159 of 181 DIABLO CANYON ISFSI FIGURE 21-26 MEASURING BEDDING ATTITUDE, ISFSI STUDY AREA December.

2001 Calculation 52.27.100.731, Rev. 0, Attachment A, of 185--V Geological team examining and classifying rock core obtained from borirngs at the ISFSL study area. Photo Roll JGH R5.DIABLO CANYON ISFSI FIGURE 21-27 EXAMINING CORE FROM ISFSI STUDY AREA GEO.DCPP.01.21 REV 2 Page 160 of 181 December, 200 Calculation 52.27.100.731, Rev. 0, Attachment A, Pagel Y, of 185..--dn=on"-Exploratory boring core from ISFSI study area laid out in stratigraphic succession for studying geologic correlation of bedrock units. Photo roll JGH R5.December, 2001 GEO.DCPR01.21 REV 2 Page 161 of 181 DIABLO CANYON ISFSI FIGURE 21-28 CORE BOXES FROM ISFSI STUDY AREA LAID OUT IN STRATIGRAPHIC ORDER_ .-

Calculation 52.27.100.731, Rev. 0, Attachment A, Page 1 Wo~ of 185 Clay bed within dolomite (Tofb-) with sample tube in trench T-14B. Photo roll JLB-8.GEO.DCPP.01.21 REV 2 DIABLO CANYON ISFSI FIGURE 21-29 CLAY BED IN TRENCH T-14B Page 162 of 181 December, 2001 Calculation 52.27.100.731, Rev. 0, Attachment A, Page I (A of 185 S5- df--c-----.-rest c-q~r Cla-y- A ot. 1o&1l N Clay bed in boring OOBA-1 at 55 feet. Note tight contacts with bounding rock, and low dip angle. Photo roll JLB-8 GEO.DCPR.1.21 REV 2 Page 163 of 181 DIABLO CANYON ISFSI FIGURE 21-30 CLAY BED AT 55 FEET IN BORING OOBA-1 December, 2001 I^J Calculation 52.27.100.731, Rev. 0, Attachment A, PagelPA of 185 I Typical appearance of clay bed and bedding laminations in a section of core at 130 feet from boring 01-I, south of the ISFSI. Clay bed occurs within Tofb_1. Photo roll 01JLB-ba.GEO.DCPR01.21 REV 2 Page 164 of 181 DIABLO CANYON ISFSI FIGURE 21-31 CLAY BED AT 130 FEET IN BORING 01-1 December, 2001 Calculation 52.27.100.731, Rev. 0, Attachment A, Page' o° of 185 Minor fault in trench T-1 juxtaposing friable sandstone (TOfb_2a) on left against dolomite (Tofbl) on the right. Photo roll JLB-2.DIABLO CANYON ISFSI FIGURE 21-32 MINOR FAULT IN TRENCH T-1 GEO.DCPP.01.21 REV 2 Page 165 of 181 Decembe,20 Calculation 52.27.100.731, Rev. 0, Attachment A, PagellO of 185...w -. .," ' /- ( .-.- '- -.t ..- .._. ... ...-=.Thin-to medium-bedded dolomite (Tofb-l) exposed in the roadcut of Reservoir Road directly southwest of the ISFSI. Note the laminations and bedding parting surfaces in the dolomite.

Gray zones in the rock are believed to be petroliferous stains. Photo roll JLB4-3.GEO.DCPR01.21 REV 2 DIABLO CANYON ISFSI FIGURE 21-33 BEDDED DOLOMITE ON RESERVOIR ROAD Page 166 of 181 December, 2001_J Calculation 52.27.100.731, Rev. 0, Attachment A, Page ___ of 185*- -" Friable dolomite (Tofb..a; left part of photo) in contact with closely-fractured dolomite (Tofb.1; right part of photo) in trench T-20A. Shear fabric in dolomite at the contact indicates the presence of a minor fault. Photo roll JGH 2-1.GEO.DCPP01.21 REV 2 Page 167 of 181 DIABLO CANYON ISFSI FIGURE 21-34 MINOR FAULT IN TRENCH T-20A December, 2001 Calculation 52.27.100.731, Rev. 0, Attachment A, Pagejj. of 185 Outcrop of thick to massive bedded, weathered sandstone (Tofb_2), directly west of the ISFSI. Photo roll JLB OLD-2.GEO.DCPPO01.21 REV 2 Page 168 of 181 DIABLO CANYON ISFSI FIGURE 21-35 SANDSTONE OUTCROP IN THE ISFSI STUDY AREA December, 2001 Calculation 52.27.100.731, Rev. 0, Attachment A, Page I13 of 185 Typical dolomite (Tofb_1) and thin clay beds exposed in trench T-l1C. Clay beds are subhorizontal and define bedding. Photo roll 01JLB-1.GEO.DCPRO1.21 REV 2 Page 169 of 181 DIABLO CANYON ISFSI FIGURE 21-36 CLAY BEDS AND DOLOMITE IN TRENCH T-11C December, 2001 Calculation 52.27.100.731, Rev. 0, Attachment A,

185 pfrom PG&E, 1988)Explanation Fault: dashed where approximately located; teeth indicate dip direction of reverse fault; arrows indicate relative sense of displacement I...... Syncline axial trace 0.14 Late Pleistocene (post 120,000 years ago) uplift rate (meters/1 000 yr) 0.16" Uplift rate (meters/1000 yr) based on the altitude and estimated age (560,000 years) of the Q7 marine terrace (modified from PG&E, Final Report of the Long Term Seismic Program, 1988).EB Estero Bay Subblock it Irish Hills Subbloek FD Edna Subblock N Newsom Ridge Subblock Average fault trend (338') used for ground motion analyses GEODCPR01 21 REV 2 Page 170 of 181 C y DIABLO CANYON ISFSI FIGURE 21-37 REGIONAL STRUCTURE MAP December, 2001 Calculation 52.27.100.731, Rev. 0, Attachment A, Pagel- of 185 N'0 C Explanation

• General range in strike of zone of minor faults

• Rake of slickenside on fault plane of minor faults Equal-angle lower hemisphere plot.GEO DCPP.01.21 REV2 Page 171 of 181-I Co DIABLO CANYON ISFSI FIGURE 21-38 COMPARISON OF ORIENTATIONS OF MINOR FAULTS AND FOLDS IN THE ISFSI STUDY AREA WITH OTHER STRUCTURES Deoentor, Io Calculation 52.27.100.731, Rev. 0, Attachment A, Page ___ of 185'.4 . A.'. . -'! 4F4 tlt Northward view of Diablo Creek Road cut showing steeply dipping minor faults in dolomite of unit Tofb_1. Slickensides and mullions on the fault plane indicate primarily strike-slip displacement, but bedding also suggests a component of down-to-the-east vertical separation of approximately 3 to 6 feet. These faults are located along projection of faults exposed in trenches at the ISFSI, approximately 800 feet to the southeast, that have similar strike and slickenside/mullion rakes. Photo roll JLB5/16-1.

GEO.DCPRo1.21 REV 2 Page 172 of 181 DIABLO CANYON ISFSI FIGURE 21-39 MINOR FAULTS ALONG DIABLO CREEK ROAD uecemoer, December, 2001 1968 stereo air photos (2777; 2808-1 and 2808-2) of ISFSI study area prior to the 1971 excavation of the borrow site. Diablo Creek traverses the upper (northern) part of the photo. Trenches for the power block are evident in the lower left. The road that follows the ridge crest in center of photo was removed during 1971 excavation of the borrow area. No features indicating deep seated landslides are present at the site; large landslides are evident to the east, however. The small landslide south of the word "swale" is shallow and was removed in the 1971 excavations.

See Figure 21-3 for unit descriptions.

To view with a stereoscope, fold and adjust the photos as necessary.

GE.DCPPRO.21 REV2 fa&%wq~t Olo e Py I if I I t 4 I-s DIABLO CANYON ISFSI FIGURE 21.40 1968 AERIAL PHOTOGRAPH OF ISFSI STUDY AREA Deoýmber.

2001 E 1.149.000 C-lkSlo e 0, Alnt ment A, I $11" ir ---a r T7 A~AW-1N1636,00O Explanation I Tench or bodng number S"~Azimuth piot of fractures faults) In tbrches and fractures n bedng. Number of Join nd /rator faukse Exploratory trench+Boring for I$FS1; sampled with optical televiewer Footprint of 500-kV tower Note: Data from Tab]e 21-7-N 635,60 T 5P 5I I MI I , 2 Note: ISF8I geomety Is based on PG&E Enercon Drwg. Base map from No PGE-C,09-sk-001 dated 9/27/01 i; 7 GEO.DCPR01.21 REV2 Dsceinb~er, M00 Page 174 of 181 DIABLO CANYON ISFSI FIGURE 21-41 AZIMUTH PLOTS OF FAULTS AND JOINTS IN BORINGS AND TRENCHES E 1,10,00 I S....e o Pvgn.. ---- --- --- --- --- --- ---' -I- ~R IsI ( 4/ // 1+ /4 &I S 14 "C \#Zt # y# S '< / .7/// / '7 7,, / 4) 71/4-A a-N 636,00DC CZ E 1,148,500"r1ofi-ý--m T-f-l.'%...--" Thf 1 //-N .SC0O Clay bed, approximate dip Indicated Clay bed expected within 5 feet below ISFSI pads subgrads Note: Projection of lithologic units, clay beds, and faults are based on surface mapping and borings, and are considered approximate A 50 W 190 .lio 290 GEOlDCPP.01.21 REV2 De 20nber 2,01 Page 175 of 181 E 1,140,000 I L Co~va1tleu52.7.8.71w , Rev., Att.cbmeA, Pjqjof IB Explanation Footprint of 500-kV tower Outline of ISFSI pads (subgrode at el. 302') and CTF (subgrade at about el. 286' and 296'.) Proposed cutelope above and filillope to the west of ISFS1 pads DOLOMITE UNIT DIABLO CANYON ISFSI FIGURE 21-42 GEOLOGY OF ISFSI AND CTF SITES AT PROPOSED FINAL GRADES Dolomite, clae dolomite, dolomitic siitstone to fine-grained dolomitic FTI 71 sandstone, anlimestone.

The unit contains occasional dscontinuous to con.nuous (tens to hundreds of feet) clay beds that are generally 1/32 to 1/2-inch thick but locally are thicker. Rocks In this unit are moderatel to wall cemented, moderately hard to hard, moderately to ligbtiyweagwey, brittle and typically medium strong. i Friable dolomite and dolomitimc litstone of unit Tofbl. These rcks have low hardness, am very weak to weak, and occur as d=econnuous zones where weatheing and/or aiteration has been concentrated.

Inferred lateral extent of friable zones Is schematic.

SANDSTONE UNIT Tb Fine to coarse-grained dolomitic sandstone and sandstone (arkosie to arentc) with loesser dolomite beds. Detrital clasto are composed prmarly of dolomitlzed feldspars, marine fossil fragments, and vocan Ic rock fhae nts. Discontinuous clay beds that are generally less than l/2-inch thIk occur locally within the unit. The rocks are of low to medium hardness, moderately to well cemented and typically medium strong. Tb-2 Fiable sandstone of unit Tofb.2. These rocks typically are of low hardness are very weak to weak and occur as discontinuous zones where weathering and/or alteration has bWon concentrated.

Inferred lateral extent of friable zones Is schematic.

Friable bedrock expected within 5 feet below ISFSI pads subgrade" i I.\11 2.. " ]]

cldcafiotfllOO.73L Revý. 0, tacl, nt A, PMel10UR DDH-D 3.0 100 f 20 SANDSTONE; gray and yelow brown; fine to very ne grained; slightly calcareous; low hardness; closely fractured-60 80 100 SANDSTONE; gray and yelow brown; fine to very fnne grained; slightly calcareous; low hardness:

120 closely fractured with mainly open joints, locally healed or filled.-20 "- 140-80-120 140--160 a) "16 SANDSTONE; mottled 160 a rne to w, fine miraned; slightly calcareous; moderate 180 hardness; closely to moderately fractured with o en, filled and 200 heal joints, filled with clay, calcite, or pyrite crystals.-100220 240 SILTSTONE; brownish gra ; some very fine sand and mica; slightly calcareous; moderate 260 hardness; closely to moderately fractured with open, filled and healed cntfifdc wfith day, caliete, 280 or pyrite crystals; locally fossiliferous.

11/22/77 el. 114.67 ft.0 1 1 50 100%0-Power block grade (elevation 85' met)0L 8: C., C. -I 20-40-" 120 -100 Explanation D-80 6 60 80{Percent recovery of core run Rock Quality Designation of core run 40 100o 20120- sea level1160"-20 -40 IU Geologic contact 3.0-inch NX wirellne coring Shear wave (Vs) velocity Compression wave (Vp) velocity ts0- -60 2 0 0 t -80 220t -'0'240 260-280 300-I I I I I I I 0 2000 4000 6000 8000 10000 12000 14000 I 16000 18000 Velocity (fps)S-120 --140--160-180 -200 -220 Note: BOring loged In 1977 by DW. Frames. Casing used for the upper 18.5 feet. Down Ole logging performed by Bruce Redpath. < Velocity profile from PG&E, 1989, Response to NRC Question 19 dated December 13, 1988. DIABLO CANYON ISFSI FIGURE 21-43

SUMMARY

LOG OF 1977 POWER BLOCK BORING DDH-D AbEO[DXpP01.21 REV 2 eceer, 20O1 Page 176 of 181 120 -0 60 40. 20 em level -A. LiiI-40"-60,-180l -200-220-80" 140 Cftaio ft Rev. O, AMtahment A, Paoep or am Borings 98BA-1 and 98BA-4 Boring 98BA-3 Velocity (rnaters/second) 0 500 1000. 1500 200Q. 2500 V.3000 3500 4000 1 --Rl-R2 VS BA 98-04 -O--S-R1 Vs BA 08-04 -----8-R Vp BA 98-04 ----R1-R2 VS BA 98-01 *-R1-R2 Vp BA 98-01 "-A"S-RI Vs BA 9&01 "-+-RI Vp BA 98-01 R1-R2 V BA W-04 0 20 40 60 8o 100 120 140 160 180 200 220 240 2000 4000 6000 0 370 350 330 310 290 ,7n-C a S L .. ... .. 2 J ... 310 S-.- -Average veloty prfile Vs Average velocity profile Vp 4-;w 190 .170 :150 -130 8000 10000 12000 14000 Velocity (feet/second) 220 240 0 500 Vs 1000 150' SVp Velocity (meterslsecon' 0 2000 2500 d)3000 3500 4000 --R1-R2 Vs "S-R1 Vs --U--S-R1 Vp R-R12 20 40 60 80 100+0 2000 4000 Note: Average velocity profiles interpreted frot, data H1 -R2 = Receiver-to-receiver velocity (3.3-foot spacing) S-R1 = Source-to-raceiver velocity (10.3-foot spacing)6000 8000 Velocity (feet/second) 300 280 260 240 10000 12000 14000 C O Modified from GEOVIsion (1998), In William Letds & Assoc. Inc., 2001, DCPP ISFSI Data Report C.Page 177 of 181 160 180 200 r a 0 C 0 DIABLO CANYON ISFSI FIGURE 21-44 ISFSI SITE SUSPENSION LOGS AND INTERPRETED AVERAGE SEISMIC VELOCITIES 320 I I: ; :Pad grade at 31O0 i Avers 200 "0 loo 180 160 140 120 100 80 I ...... ..... '4 ge velocity profile Vp21023 120 140")

Shear wave velocity (fps in 1000 a) 0 1 2 3 4 5 6 1001-i5 s-200 250 i.Calculation 52.27.100.731, Rev. 0, Attachment A, Pagel %of 185 7 8 9 i Explanation I Upper- and lower bound LTSP shear -wave profile envelope 50 (C31 Decembe 2001 GEO.OOPO01.21 REN 2 Page 178 of 181 0, 0) -C U 0) C DIABLO CANYON ISFSI FIGURE 21-45 COMPARISON OF SEISMIC SHEAR-WAVE VELOCITIES AT THE POWER BLOCK AND ISFSI SITES Power block boring DDH-D (1977) (Figure 2.6-34) ISFSI borings S~98BA-3 (1998) 98BA-1,4 (1998) (Figure 2.6-33)

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.21 REV 2 Page 181 of 181 December, 200 c 3jy I-h ------4=at=FSfl~f 00 I j--- FoW. pýi throuh cla W -F.Wk, PII throuh oino otms I~ ~ = Int 2 Nh tsc ac Ah~nWtIv Slide .s Modal DIABLO CANYON ISFSI FIGURE 21-48 SLIDE MASS MODELS3