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MALor-Pita <br />&SSOCIATES, INC. <br />FIELD REPORT MPA Project # 1567 <br />Project Name: Sound Transit Everett <br />Date: 1-26-06 <br />Location: Everett WA <br />Report # 2 <br />Client: ZGF/INCA <br />Contractor: APS <br />Arrive Site:7:30 am <br />Depart Site:3:30 par <br />City Project #: NA Permit #: NA <br />1Veather Conditions: Overcast Temp: 40 <br />Comments: <br />I arrived at the site at 7:30 am. APS arrived at 745 am. One flagger arrived at 8 am; another at 9 <br />am. We marked the holes with spray paint. The utilities had been checked the previous week. We <br />cored or jack -hammered through the asphalt and PCC on the holes. The method is noted in the <br />table below. After we were through the AC/PCC, we potholed using a VacMaster Vac-n-Dig. <br />This machine blows air at high pressure into the hole and dislodges the soil. Then a vacuum <br />attachment is lowered into the hole and the soil is sucked out into the tank on the rig. The location <br />of the holes are shown on the site plan, prepared by INCA/ZGF and augmented by MPA. I took <br />grab samples at discrete depths in the hole. The grab samples are described in the table below. <br />Coring <br />Thickness of <br />Final <br />Method of Comments <br />Number <br />Pavement in <br />depth <br />Pavement <br />Inches <br />of <br />Excavation <br />hole <br />Asphalt <br />PCC <br />(AC) <br />MI'GI <br />3.5 <br />0 <br />4' Jackhammer Subgrade to 10"-Crushed 1.5" minus. <br />10"-Brown, coarse gravelly, silty fine to coarse SAND; <br />30"-Water see ;blue -gray silty CLAY. <br />MPC-2 <br />8 <br />0 <br />3'8" Jackhammer Subgrade-Very dense, brown, silty fine to medium <br />SAND, trace fine gravel. <br />V-transition to stiff, mottled brown and blue -gray, <br />silty CLAY. <br />2.5'-Stiff, bluegray silty CLAY; rod pen. 310 4". <br />MPC-3 <br />10 <br />0 <br />4' Jackhammer I'3"-Ceramic piece in soil; <br />1.5'-Soft, dark brown, silly fine to median SAND, <br />trace coarse sand, wood chips; 8" pen. of rod. <br />2'-Odor of rotting wood. <br />Transition to brown/blue-gray clayey silt at 3'. <br />MPC4 <br />6 <br />0 <br />5'8" Core 1.5' -V. dense, brown, slightly silty fine to medium <br />SAND, trice coarse sand;'R " pen. of rod. <br />3'V. dense, slightly silty fine SAND. <br />MPC-5 <br />2 <br />8 <br />3'8" Jackhammer Very dense PCC with large (2.5" to 3") aggregate. The <br />to 2", then contractor began to jackhammer through PCC but the <br />cored. bit bent due to the density. Switched to coring. <br />10"-16"-Very dense, brown silty CLAY; <br />LS'-Mottled brr.«an/blue-gray clayey SILT, trace fine <br />sand; <br />2'-3'8"- Very stiff, blue -gray, clayey SILT, trace fine <br />sand; W' pen. of rod. <br />Geotechnical and Tunnel Consultants <br />17270 Woodinville -Redmond Rd, Ste 703 w.w uolbor-nimsotn Phone (425) 486-6561 <br />Woodinville, WA 98072 Pagel Fax (425)488-2660 <br />