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

BACKHOE TRENCH.PV-BH-2OA North Wall N60 E SILTY SAND ANO 6RAVEL BROWN, LOOSE, CALCAREOUS, POORLY SORTEO, FINE TO ORIGINAL GROUND SURFACE DISTURBED COARSE GRAINED SANO ANO VOLCANIC BY EGUIPMENT ACTIVITY GRAVEL OISTURBEO SURFACE DEBRIS GENERATED FEET BY EXTENSIVE EQUIPMENT ACTIVITY I I I I I

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BASALT RED-BROWN. PROPHYRITIC,

.0 BURROW IN PLACE ALTERATION OF PHENOCRYSTS 0'ILLED (SAUSSURITIZATION), HIGHLY JOINTED I NUMEROUS CALICHE STRINGERS ANO SOIL FILLED COATING, DENSITY INCREASE WITH o

DATUM 2

<V4 EROSION FEATURE - VERYI DEPTH, TIGHT DATUM 12 SILTY SANO ANO GRAVEL,)

PREVIOUSLY 1 POORLY SORTED, LOOSE, ABUNDANT ROOTLETS I BASALT - GRAY, PORPHYRITIC, SLIGHT HAPPED ALTERATION. HIGHLY JOINTEO, EXTENSIVELY FAULT A I SHEAR ZONE ANOESITE (?)

N46'W VOLCANICS GREENISH-GRAY FRACTURED, CALCITE FRACTURE FILLINGS 85'SW I GO(TOW REO-BROWN, GRAY, HIGHLY LAST EVIDENCE FRACTURED, EXTENSIVELY DLO 10 OF SHEARING ALTERED 0 I WHITE ALTERED TUFFACEOUS SANDSTONE (?)

GOUGE (?) MATERIAL LIGHT GRAY, POORLY SORTEO, CALCAREOUS, CALCITE FILLINGS SHEAR N65 W 82'SW PLUNGE 78~6 CONTACT~ N50 8 I VERT I

CONTACT POSSIBLE SHEAR~ TRENCH FLOOR I

DATUM DATUM FAULT - SLICKENSIOES VISIBLE, N75"W (APPROX PLUNGE 70?SW BASALT DARK GRAY, LOCALLY REO-BROWN N55 W TREND) WHITE GOUGE X" THICK BRECIATEO. HIGHLY FRACTURED, CALICNE 74 NE COATING, CALCITE FRACTURE FILLING, IRON CRUSHED ZONE (?) I OXIDE COATINGS, ALTERED PHENOCRYSTS RED- I BROWN AREA OF EXTENSIVE FRACTURING BASALT REO-BROWN, HIGHLY FRACTURED AND ALTERATION VOLCANIC ALTERED, CALICHE COATINGS, HIGHLY N5508 ROCK TYPES NDT DISTINGUISHABLE 870SW OXIDIZED FAULT A SHFARS COMVERGING TOWARD'OTTOM SHEAR OF TRENCH SURFACE WHITE ALTEREO GOUGE MATERIAL PINCHES OUT DOWNWARD WITH BLUE-GRAY VOLCANICS, HARD, BLOCKY BASALT RED-BROWN TO REOSGRAY, STRUCTURES, CONTAINS PINK AND HIGHLY ALTERED, FRACTURED, HIGHLY CLEAR FRAGMENTS MANGANESE STAINS Date OI Excavation 6 26 75 CHANGE OXIDIZED ZONE IN ALTERED SECTIONS LOG OF TRENCH PV-BH-20A November 17, 1975 Amendment 14