ML18192B848

Backhoe Trench PV-BH-20A, North Wall.

ML18192B848
Person / Time
Site:	Palo Verde
Issue date:	11/17/1975
From:	Arizona Public Service Co
To:	Office of Nuclear Reactor Regulation
References
Download: ML18192B848 (1)

Text

16 I-15 I-10 ORIGINAL GROUND SURFACE DISTURBED BY EGUIPMENT ACTIVITY-5 SILTY SAND ANO 6RAVEL-BROWN, LOOSE, CALCAREOUS, POORLY SORTEO, FINE TO COARSE GRAINED SANO ANO VOLCANIC GRAVEL 5 BACKHOE TRENCH.PV-BH-2OA North Wall FEET 10 15 N60 E I 20 OISTURBEO SURFACE DEBRIS GENERATED BY EXTENSIVE EQUIPMENT ACTIVITY I 25 I 30 14 12 10 BASALT-GRAY, PORPHYRITIC, SLIGHT ALTERATION.

HIGHLY JOINTEO, EXTENSIVELY FRACTURED, CALCITE FRACTURE FILLINGS~~g z5oQ..fliJ(o'g:.c)"2)oQn P 0 El" Q'onoQ'4 vino.4..:.'goo.~4 (2 PO.W45O'n(J7O'~Z7Q A DD(7ZT Q 9,POCJDoy..o" ()Q>...'.g(20~no o, gO.'Q OJO4",Q.';..

O, Oo O.O GRAVEL-LIGHT GRAY TO DARK GRAY,.'.Oo 0, OOC?gO,~0~'IPS'PIP:47.p g v Ro~L?o45.c>I-Jgg"(2;(2n'zz',.Do go.z)'8:" 00:"O~QOo 0 0o o'0o QA"..~oo.o:ot)Qgo~LDOsE, GNOALGAREDUs, slLTY, suaj~o oD oQ'Gag, o cpo cl+0 (74FID+.OJ?), v',Pg'go,ot.o.'c"'op,:

..Q<<~'000~.0.<o',."-Fbt?u GJ(5 0 gp 4NGUL46 YDL04HIG GR4YELs 2",o90 0'PQ.RDUGH HEATHERED sURFAcE>4'D.0'.:.0.'"o'0.

0,4 ()IIEI Q'O'ORo 0>>OoO PEP;Q.:U.0 2 o DATUM<V4 PREVIOUSLY 1 HAPPED FAULT A N46'W 85'SW 0 04 4'C>'O 4 O~>e 0 FJD0 4 o?7 ou'IGHLY IRREGULAR (ZWEATHERED SURFAC~E GI 047'.,'U 0,0>.:.g('7.'CP o+o.':(7':::.-.4):-.C 0'ILLED BURROW I SOIL FILLED EROSION FEATURE-VERYI SILTY SANO ANO GRAVEL,)POORLY SORTED, LOOSE, ABUNDANT ROOTLETS I I I LAST EVIDENCE OF SHEARING STREAM BEO o.0"'OO.O, Og 0'0;0.,0 f)0<o.SHEAR ZONE ANOESITE (?)VOLCANICS GREENISH-GRAY REO-BROWN, GRAY, HIGHLY FRACTURED, EXTENSIVELY ALTERED BASALT-RED-BROWN.

PROPHYRITIC, IN PLACE ALTERATION OF PHENOCRYSTS (SAUSSURITIZATION), HIGHLY JOINTED NUMEROUS CALICHE STRINGERS ANO COATING, DENSITY INCREASE WITH DEPTH, TIGHT GO(TOW DLO DATUM 0 I WHITE ALTERED GOUGE (?)MATERIAL TUFFACEOUS SANDSTONE (?)LIGHT GRAY, POORLY SORTEO, CALCAREOUS, CALCITE FILLINGS CONTACT~CONTACT SHEAR N50 8 I VERT I POSSIBLE SHEAR~I N65 W 82'SW PLUNGE 78~6 TRENCH FLOOR DATUM DATUM BASALT-DARK GRAY, LOCALLY REO-BROWN BRECIATEO.

HIGHLY FRACTURED, CALICNE COATING, CALCITE FRACTURE FILLING, IRON OXIDE COATINGS, ALTERED PHENOCRYSTS RED-BROWN N55 W 74 NE CRUSHED ZONE (?)I I N75"W (APPROX TREND)FAULT-SLICKENSIOES VISIBLE, PLUNGE 70?SW WHITE GOUGE-X" THICK BASALT-REO-BROWN, HIGHLY FRACTURED ALTERED, CALICHE COATINGS, HIGHLY OXIDIZED FAULT A-SHFARS COMVERGING TOWARD'OTTOM OF TRENCH SHEAR SURFACE N5508 870SW AREA OF EXTENSIVE FRACTURING AND ALTERATION

-VOLCANIC ROCK TYPES NDT DISTINGUISHABLE CHANGE BASALT-RED-BROWN TO REOSGRAY, HIGHLY ALTERED, FRACTURED, HIGHLY OXIDIZED ZONE WHITE ALTEREO GOUGE MATERIAL PINCHES OUT DOWNWARD WITH BLUE-GRAY VOLCANICS, HARD, BLOCKY STRUCTURES, CONTAINS PINK AND CLEAR FRAGMENTS MANGANESE STAINS IN ALTERED SECTIONS Date OI Excavation 6 26 75 LOG OF TRENCH PV-BH-20A November 17, 1975 Amendment 14