PT-1 (cont.) PT-1 (cont.) 380 260 280 300 320 390 370 270 290 310 330 350 360 340 Sta 250 (in feet) 520 400 420 440 460 530 510 390 410 430 450 470 490 500 480 Iron oxidation staining. Lateral spreading Continuous bedding Fracture: Iron oxidation staining. Concrete pipe Ground surface Secondary seismic: No offset of silt. Fracture: N30E/90 Clay bed Silt clasts 9 Sandy silt (ML)/Ash; medium stiff, pale yellow (5Y 8/3) dry to moist, thinly laminated to laminated. 11 10 Clay balls Clay lenses Pipe fragment af 7A Silty sand (SM); medium dense, light gray (5Y 7/1) dry-moist, fine to medium, laminated to thinly bedded, abundant biotite, minor iron oxidation staining. Silty clay (CL); medium stiff, light brownish gray (10YR 6/2) moist. 10 11 N58E 0 10 GRAPHIC SCALE (in feet) HORIZONTAL = VERITCAL LAW Trench Logs: PT-1 cont. Jan. 2007 389-06 The Villas PLATE 3 PETRA GEOTECHNICAL, INC. 12225 WORLD TRADE DRIVE, SUITE P SAN DIEGO, CALIFORNIA 92128 PHONE: (858) 485-5530 DATE: J.N.: DWG BY: SCALE: See above COSTA MESA MURRIETA PALM DESERT SAN DIEGO SANTA CLARITA