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

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.0 2 o DATUM

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SOIL FILLED EROSION FEATURE - VERYI SILTY SANO ANO GRAVEL,)

POORLY

SORTED, LOOSE, ABUNDANT ROOTLETS I

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LAST EVIDENCE OF SHEARING STREAM BEO o.

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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