ML18193A156

Log of Trench PV-BH-20A

ML18193A156
Person / Time
Site:	Palo Verde
Issue date:	11/17/1975
From:	Arizona Public Service Co
To:	Office of Nuclear Reactor Regulation
References
Download: ML18193A156 (1)

Text

12 BACKHOE TRENCH PV-BH-20A South Wall N60oE GRAVELLY SURFACE DEBRIS ANO HEATHERED BEDROCK LT GRAY-BROWN LOOSE CLASTS ANGULAR To SUBANGULAR NATURAL GROUND SURFACE AND DEBRIS-OISTURBEO BY EXTEHSIVE EQUIPMENT FEET ACTIVITY I

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OPEN BURROUGHS OBSERVED I

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I DATUIII SHEAR BRECCIA HIGHLY ALTERED VOLCANICS, EXTEN-SIVELY FRACTURED N64 W

86 SW

~ CONTACT SHEAR BASALT LT GRAY To GRAY PROPHYRI-

TIC, HIGHLY JOINTED, MODERATELY FRAC-

TURED, CALICHE COATING ANO CALCITE FILLINGS DATUM BASALT RED-BROWN PORPHYRITIC IN-PLACE ALTERATION OF PHENOCRYSTS To GREEN (SAUSSURITIZATION) ANO REO-BROWN HIGHLY JOINTED FRACTURED NUMEROUS CALICHE STRINGERS, CALCITE AND CALICHE COATINGS ON FRACTURE

SURFACES, FRACTURES TIGHT ANO UN-FILLED IN TRENCH BOTTOM FAULT A SHEARS CONVERGING TGWARO, BGTTOM OF TRENCH N55'-63'W 87 NE DATUM FAUL SOFT ALTEREO BLUE-GRAY VOLCAN(OS SHEAR N50'W 76 SW N55oW VERT

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WHITE ALTEREO GOUGE MATERIAL CONTACT l ill<<ll l (I l I IIIll DATUM FLOOR OF TRENCH CIJANGE AREA OF EXTENSIVE ALTERATION AND NUMEROUS SHEAR-LIKE SURFACES LT.

GRAY, BROWN, RED-BROWN, GREENISH-GRAY, HIGHLY FRACTURED, ABUNDANT CALICHE N60 W

VERT.

(FLOOR)

N55'8 75oSW (FLOOR)

OXIDIZED ZONE BASALT DARK GRAY TO LOCALLY RED-

BROWN, BRECCIATED, HIGHLY FRACTURED, CALICHE, CALCITE ANO IRON OXIDE COATINGS OF FRACTURED SURFACES, ALTERED PHENOCRYSTS BASAL'I DARK REO BROWN HIGHLY ALTEREO EXTENSIVELY FRACTURED HIGHLY OXIDIZED ZONE WHTTE ALTERED GOUGE MATERIAL PINCHES OUT NEAR TRENCH

BOTTOM, SNEAREO SOFT

" CLAY-LIKE "

ABRUPT CONTACT WITH OXIDIZED VOLCANICS ON

WEST, IRREGULAR, CPAOATIONAL CON-TACT WITH BLUE-GRAY VOLCANICS Oata of Excavation 9-26-76 LOG OF TRENCH PV-BH-20A November 17, 1976 Amendment 14