ML18192B849

Backhoe Trench PV-BH-20A, South Wall

ML18192B849
Person / Time
Site:	Palo Verde
Issue date:	11/17/1975
From:	Arizona Public Service Co
To:	Office of Nuclear Reactor Regulation
References
Download: ML18192B849 (1)

Text

BACKHOE TRENCH PV-BH-20A N60oE South Wall

..o GRAVELLY SURFACE DEBRIS AND WEATHEREO BEDROCK - LT GRAY-BROWN LOOSE CLASTS NATURAL GROUND SURFACE ANO DEBRIS ANGULAR TO SUBANGULAR DISTURBED BY EXTENSIVE EQUIPMENT FEET ACTIVITY I I I I I I I 25 20 15 10 5 0 -5 -10 -15 STREAM BEO

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UPPER TRENCH AREA HIGHLY OISTURBEO BY EQUIPMENT I 12 OPERATION I I

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I BASALT LT GRAY TO GRAY PROPHYRI-TIC, HIGHLY JOINTED, MODERATELY FRAC-TURED, CALICHE COATING ANO CALCITE N64 W SHEAR 66'SW FILLINGS Oh DATUM BASALT REO-BROWN PORPHYRITIC IN-PLACE ALTERA710N OF PHENOCRYSTS SHEAR BRECCIA

'ALTEREO VOLCANICS, EXTEN-SIVELY FRACTURED HIGHLY-SOFT ALTERED BLUE-GRAY

~ CONTACT WHITE ALTERED GOUGE MATERIAL DATUM VQLCANICS To GREEN (SAUSSURITIZATION) AND FLOOR OF TRENCH REO-BROWN HIGHLY JOINTED FRACTURED N55 -63 W NUMEROUS CALICHE STRINGERS, CALCITE 67 NE AND CALICHE COATINGS ON FRACTURE CONTACT SURFACES, FRACTURES TIGHT AND UN-FILLED IN TRENCH BOTTOM SHEAR N55oW VERT nn'i H'I N50'W 76 SW FAULT FAULT A SHEARS DATUM DATUM CONVERGIHB TOWARD BOTTOM OF TRENCH AREA QF EXTENSIVE ALTERATION BASAL'I DARK GRAY TO LOCALLY RED-ANI} NUMEROUS SHEAR-LIKE BROWN, BRECCIATED, HIGHLY FRACTURED, h

SURFACES LT. GRAY, BROWN, CALICHE, CALCITE AND IRON OXIDE OXIDIZED ZONE RED-BROWN, GREENISH-GRAY, ohio CDATINGS OF FRACTURED SURFACES, HIGHLY FRACTURED, ABUNDANT ALTERED PHENOCRYS73 CALICHE N60 W VERT BASALT DARK RED-BROWN HIGHLY ALTEREO (FLOOR)

EXTENSIVELY FRACTURED HIGHLY OXIDIZED ZONE WHITE ALTERED GOUGE MATERIAL-PINCHES OUT NEAR TIIENCH BOTTOM, N55 6 75'SW SHEARED, SOFT,

" CI.AY-LIKE ", ABRUPT CONTACT WITH OXIDIZED VOLCANICS ON CHANGE (FLOOR) WEST, IRREGULAR, GRADATIONAL CON- Date of Excavation 9-26-76 TACT WITH BLUE GRAI VOLCANICS LOG OF TRENCH PV-BH-20A November 17, 1975 Amendment 14