ATTACHMENT 2
Page 1 of 1 B1 0 1 2 FILL, Dry; brownish red; clayey silt and gravel; ~30% gravel size fragments of dark grey microcrystalline (aphanetic), extrusive, igneous, rock 3 B1-4a 1100 B1-4b-duplicate 1100 4 Refusal at 4 feet bgs Attempted boring at two separate locations to achieve greatest sample depth 5 6 7 8
Page 1 of 1 B2 0 1 2 3 FILL; Dry; reddish brown; silt and gravel; `~30% hard; angular; gravel and cobble size fragments of grey micro-cystalline extrusive igneous rock B2-3 1030 4 5 B2-6a 1031 FILL; Dry; tan to grey; fine sandy silt and gravel; ~25% angular; gravel to cobble size fragments of dark grey aphanitic extrusive igneous rock. 6 B2-6b-duplicate 1031 Refusal at 6 feet bgs fragments typical of gravel encountered across the site. 7 8
1 of 3 Pages B3 0 1 2 FILL; dry; light brown; silt with gravel; ~30% angular; hard; gravel size fragments; of grey aphanitic extrusive igneous rock. 3 B3-4 1400 4 5 6 7 8
2 of 3 Pages B3 9 10 11 FILL; Dry; light brown; clayey silt with gravel; rock fragments are the same as above B3-12 1401 12 13 14 15 Fill; Dry; greyish brown; fine sandy silt with gravel; rock fragments are the same as above B3-16 1402 16 17
3 of 3 Pages B3 18 Native begins 18 ft bgs. 19 20 21 22 23 24 B3-24 CL 1404 Dry; greyish brown; SILTY CLAY; dense; medium stiff; non-plastic but can be rolled; resembles weathered granite refusal at depth was not an issue for this location Boring terminated at 24 feet bgs 25 26
B4 0 1 2 FILL;Dry; light brown; clayey silt with gravel;~30% gravel; fragments are grey; angular; gravel to cobble size aphanatic;extrusive;igneous. 3 4 B4-4 925 5 6 7 FILL; Dry; light brown; clayey silt with gravel;~30% gravel; fragments are grey; angular; gravel to cobble size aphanatic;extrusive;igneous. 8
B4 9 10 11 FILL; Dry; light brown; clayey silt with gravel;~30% gravel; fragments are grey; angular; gravel to cobble size aphanatic;extrusive;igneous. B4-12 12 0926 13 14 15 Moist;reddish brown; CLAYEY SILT; ~35% grey; angular;gravel to cobble size fragments; increased plasticity CL 16 B4-4 925 native soil at ~16 feet bgs 17
B4 18 19 Moist;reddish brown; CLAYEY SILT; ~35% grey; angular;gravel to cobble size fragments; increased plasticity CL 20 B4-20 927 Boring terminated at 20 feet bgs 21 Depth to bottom is 20 feet. no refusal and little recovery in the uncompacted fill. boring situated on top of the berm created by secondary access road. 22 23 24 23 24
SITE: Proposded Rancho Coronado School B5 0 1 2 FILL; Dry;tan brown;gravelly silt;~30% hard; angular; gravel to cobble size fragments of dark grey; aphanitic; extrusive; igneous rock B5-3 3 1240 4 5 6 7 8 B5-8 12413 Compacted FILL; Moist; dark reddish brown; clayey silt and gravel; ~5% hard; angular; cobble size fragments; fragments are weathered and resemble granite; a high degree of iron oxide staining
SITE: Proposded Rancho Coronado School B5 9 10 Compacted FILL; Moist; dark reddish brown; clayey silt and gravel; ~5% hard; angular; cobble size fragments; fragments are weathered and resemble granite; a high degree of iron oxide staining 11 Native begins at ~11 feet bgs CL Moist; light reddish tan; SILTY CLAY; significant degree of iron oxide weathering; soil resembles saprolitic granite B5-12 12 1242 13 14 B5-14 1243 CL Moist; light reddish tan; SILTY CLAY; significant degree of iron oxide weathering; soil resembles saprolitic granite Refusal at 14 feet bgs 15 16 17
B6 0 1 2 Compacted FILL; damp; dark grayish brown; silt with gravel; ~40% gravel; fragments are hard; grey; aphanitic; extrusive; igneous rock 3 B6-3 1459 B6-4 SW Dry; light tan; well sorted; sandy silt; appears to be a friable weathered sandstone. Unlike any soil encountered on site. 4 1500 5 6 7 B6-8 SW Dry; light tan; well sorted; sandy silt; appears to be a friable weathered sandstone. 8 1501
B6 9 SW Dry; light tan; well sorted; sandy silt; appears to be a friable weathered sandstone. B6-10 10 1502 Refusal at ~10 feet bgs 11 12 13 14 15 16
DATE: 5/18/2012 B7 0 1 2 B7-2 0930 FILL; Dry; sandy gravel 3 4 B7-4 931 FILL; Dry; light brown; silty gravel; ~30% gravel; fragments are hard; grey; aphanitic; extrusive igneous 5 6 7 FILL; Dry; dark reddish brown; silty gravel; ~50% gravel; fragments are the same as above 8 B7-8 0932
DATE: 5/18/2012 B7 9 FILL; Dry; dark reddish brown; silty gravel; ~50% gravel; fragments are the same as above B7-10 10 0933 SM Dry; light reddish tan; fine SANDY SILT; medium dense; weathered with iron oxide staining native begins below ~10 feet bgs B7-10.5 0934 Refusal at 10.5 feet bgs 11 12 13 14 15 16 17