G-126 (Continued) MTA Westside Subway Extension Los Angeles, California. Figure: A-2.22c

Transcription

1 LA METRO PBTUNNEL ZONE S:\131 GEOTECH\GINTW\LIBRARY MACTEC JUNE11.GLB G:\PROJECT_DIRECTORIES\43\\61_METRO_WESTSIDE_EXTENSION\ GEOTECHNICAL DESIGN\3.2 ALL FIELD NOTES\GINT LOG\NEW TEMPLATE MARCH 14, 11\4361_(1139).GPJ /18/ C & L Drilling / Mayhew 0 4/4/114/7/11 SP Sta 6+, Lt feet 47/8 inches GROUNDWATER READINGS Groundwater level encountered at 31 feet below ground surface. AYEY SAND medium dense, wet, gray, fine to mediumgrained, trace gravel Becomes dense, calcium carbonate nodules SANDY LEAN AY hard, wet, gray, fine to medium sand, calcium carbonate nodules SILTY SAND dense, wet, greenish gray, fine to mediumgrained, trace gravel Becomes very dense, gray, finegrained POORLY GRADED SAND very dense, wet, greenish gray, fine to mediumgrained, some coarse, thin layer of fine Silty Sand SANDY SILT hard, wet, gray, fine sand, thin layer of Lean Clay END OF BORING AT 111½ FEET NOTES: Hand augered upper feet to avoid damage to utilities. Borehole grouted with cementbentonite slurry and patched with asphalt concrete. "N" Value Standard Penetration Test: Number of blows required to drive the SPT sampler 18 inches using a 1 pound automatic hammer falling inches *Number of blows required to drive the Crandall Sampler 12 inches using a 3 pound hammer falling 18 inches **Photo Ionization Detector used for OVA readings G feet Field Tech: DW Prepared/Date: JF 5/18/11 Checked/Date: LT/PE 9/22/11 Project No.: 4361 Figure: A2.22c

2 LA METRO PBTUNNEL ZONE S:\131 GEOTECH\GINTW\LIBRARY MACTEC JUNE11.GLB G:\PROJECT_DIRECTORIES\43\\61_METRO_WESTSIDE_EXTENSION\ GEOTECHNICAL DESIGN\3.2 ALL FIELD NOTES\GINT LOG\NEW TEMPLATE MARCH 14, 11\4361_(1139).GPJ /18/ Push C & L Drilling / Mayhew 0 4/11/11 and 4/12/11 Sta 5+, Rt 5 feet 47/8 inches 4inch thick Asphalt Concrete over 18inch thick Portland Cement Concrete, No Base Course FILL [Af] AYEY SAND moist, brown to orangish brown, fine to mediumgrained QUATERNARY YOUNGER ALLUVIUM [Qal] SANDY LEAN AY very soft, moist, gray, sandy silt interbedded Becomes brown, layers of Sandy Silt Becomes medium stiff, fine sand Becomes brown to light olive brown, trace fine sand SAN PEDRO FORMATION [Qsp] SANDY SILT stiff, moist, olive brown to olive gray, fine sand, layers of Silty Sand SILTY SAND medium dense, moist, greenish gray, finegrained G feet GROUNDWATER READINGS Drilling mud bailed on 4/11/11. Groundwater level measured at 41 feet below the ground surface on 4/12/11. SILT very stiff, moist, greenish gray, interbeds silt and sand, some clay Field Tech: DW Prepared/Date: LH 5//11 Checked/Date: LT 9/22/11 Project No.: 4361 Figure: A2.23a

3 LA METRO PBTUNNEL ZONE S:\131 GEOTECH\GINTW\LIBRARY MACTEC JUNE11.GLB G:\PROJECT_DIRECTORIES\43\\61_METRO_WESTSIDE_EXTENSION\ GEOTECHNICAL DESIGN\3.2 ALL FIELD NOTES\GINT LOG\NEW TEMPLATE MARCH 14, 11\4361_(1139).GPJ /18/11 Tunnel C & L Drilling / Mayhew 0 4/11/11 and 4/12/11 SP SANDY SILT stiff, moist, olive gray, fine to medium sand, occasional coarse Becomes very stiff, olive gray, fine to medium sand, some calcium carbonate nodules SILT with SAND very stiff, moist, greenish gray, fine sand SANDY LEAN AY very stiff, moist, gray, fine sand, occasional medium LEAN AY stiff, moist, olive gray, trace sand (Sample not recovered) Sta 5+, Rt 5 feet 47/8 inches G feet GROUNDWATER READINGS Drilling mud bailed on 4/11/11. Groundwater level measured at 41 feet below the ground surface on 4/12/11. SILTY SAND with GRAVEL medium dense, moist to wet, gray, fine to coarsegrained, fine to coarse gravel (up to 1 inch in size) SILT with SAND hard, moist, gray, fine sand, occasional medium to coarse, some clay Field Tech: DW Prepared/Date: LH 5//11 Checked/Date: LT 9/22/11 Project No.: 4361 Figure: A2.23b

4 LA METRO PBTUNNEL ZONE S:\131 GEOTECH\GINTW\LIBRARY MACTEC JUNE11.GLB G:\PROJECT_DIRECTORIES\43\\61_METRO_WESTSIDE_EXTENSION\ GEOTECHNICAL DESIGN\3.2 ALL FIELD NOTES\GINT LOG\NEW TEMPLATE MARCH 14, 11\4361_(1139).GPJ /18/ C & L Drilling / Mayhew 0 4/11/11 and 4/12/11 Sta 5+, Rt 5 feet 47/8 inches POORLY GRADED SAND medium dense, wet, gray, fine grained, trace silt SANDY LEAN AY hard, moist, gray to light gray SILTY SAND medium dense, moist, greenish gray, fine to coarsegrained, occasional gravel (3/8 inch in size) SANDY LEAN AY very stiff to hard, moist, greenish gray, fine sand Some calcium carbonate nodules SILTY SAND medium dense, moist, gray, finegrained, layers of Sandy Silt END OF BORING AT 112 FEET NOTES: Hand augered upper feet to avoid damage to utilities. Borehole grouted with cement bentonite slurry and patched with asphalt concrete. "N" Value Standard Penetration Test: Number of blows required to drive the SPT sampler 18 inches using a 1 pound automatic hammer falling inches 142 feet GROUNDWATER READINGS Drilling mud bailed on 4/11/11. Groundwater level measured at 41 feet below the ground surface on 4/12/11. *Number of blows required to drive the Crandall Sampler 12 inches using a 3 pound hammer falling 18 inches **Photo Ionization Detector used for OVA readings G127 Field Tech: DW Prepared/Date: LH 5//11 Checked/Date: LT 9/22/11 Project No.: 4361 Figure: A2.23c

5 LA METRO PBTUNNEL ZONE S:\131 GEOTECH\GINTW\LIBRARY MACTEC JUNE11.GLB G:\PROJECT_DIRECTORIES\43\\61_METRO_WESTSIDE_EXTENSION\ GEOTECHNICAL DESIGN\3.2 ALL FIELD NOTES\GINT LOG\ROTARY WASH GINT LOGS\4361_(1139).GPJ 12/2/ PMT PMT C & L Drilling / Mayhew 0 GW CH CH inch thick Asphalt Concrete over 4inch thick Portland Cement Concrete FILL [Af] WELL GRADED GRAVEL with SAND wet, dark gray to black, fine to medium gravel, fine to coarse sand QUATERNARY YOUNGER ALUVIUM [Qal] SANDY LEAN AY stiff, moist, dark gray, fine to medium sand Becomes dark olive gray Sta 563+, Lt 28 feet 4/14/11, 5/23/11 and 5/24/11 47/8 inches 141 feet GROUNDWATER READINGS Groundwater level measured at 26 feet below the ground surface on 5/24/11. QUATERNARY OLDER ALLUVIUM [Qalo] FAT AY soft, moist, olive gray, some silt, trace fine sand LEAN AY with SAND very stiff, moist, light brown, fine to medium sand, some root fragments Becomes medium stiff, light yellowish brown, fine sand, trace medium G128 SAN PEDRO FORMATION [Qsp] LEAN AY with SAND very stiff, moist, light yellowish brown to olive, fine sand, occasional medium FAT AY soft, moist, dark greenish gray, trace fine sand AYEY SAND with GRAVEL very dense, wet, bluish gray, fine to mediumgrained, fine gravel (up to ¾ inch in size) Field Tech: HTY Prepared/Date: YN 6/16/11 Checked/Date: HP/PE 9/19/11 Project No.: 4361 Figure: A2.24a

6 LA METRO PBTUNNEL ZONE S:\131 GEOTECH\GINTW\LIBRARY MACTEC JUNE11.GLB G:\PROJECT_DIRECTORIES\43\\61_METRO_WESTSIDE_EXTENSION\ GEOTECHNICAL DESIGN\3.2 ALL FIELD NOTES\GINT LOG\ROTARY WASH GINT LOGS\4361_(1139).GPJ 12/2/11 Wilshire / La Cienega Station PMT C & L Drilling / Mayhew 0 SP Becomes greenish gray Becomes medium dense Sta 563+, Lt 28 feet 4/14/11, 5/23/11 and 5/24/11 47/8 inches 141 feet GROUNDWATER READINGS Groundwater level measured at 26 feet below the ground surface on 5/24/11. SANDY LEAN AY stiff, moist, greenish gray, fine sand, some medium Becomes hard, trace fine to coarse gravel Layer of Sandy Silt, stiff, fine to medium sand G128 POORLY GRADED SAND with SILT very dense, wet, dark greenish gray Field Tech: HTY Prepared/Date: YN 6/16/11 Checked/Date: HP/PE 9/19/11 Project No.: 4361 Figure: A2.24b

7 LA METRO PBTUNNEL ZONE S:\131 GEOTECH\GINTW\LIBRARY MACTEC JUNE11.GLB G:\PROJECT_DIRECTORIES\43\\61_METRO_WESTSIDE_EXTENSION\ GEOTECHNICAL DESIGN\3.2 ALL FIELD NOTES\GINT LOG\ROTARY WASH GINT LOGS\4361_(1139).GPJ 12/2/ C & L Drilling / Mayhew 0 CH SW CH Sta 563+, Lt 28 feet 4/14/11, 5/23/11 and 5/24/11 47/8 inches 141 feet GROUNDWATER READINGS Groundwater level measured at 26 feet below the ground surface on 5/24/11. FAT AY with SAND very stiff, moist, dark greenish gray AYEY SAND dense, moist, light greenish gray, fine to mediumgrained, trace coarse, trace gravel WELL GRADED SAND medium dense, moist, dark greenish gray, trace clay SANDY LEAN AY moist, dark greenish gray, fine sand FAT AY with SAND hard, moist, medium sand Becomes stiff, light greenish gray, fine to coarse sand, thin layers of Clayey Sand, fine gravel LEAN AY with SAND moist, dark greenish gray AYEY SAND very dense, wet, finegrained SANDY LEAN AY stiff, moist, dark greenish gray, fine sand END OF BORING AT 111 FEET NOTES: Hand augered uppper 5 feet to avoid damage to utilities. Borehole grouted with cement bentonite and patched with asphalt concrete. "N" Value Standard Penetration Test: Number of blows required to drive the SPT sampler 18 inches using a 1 pound automatic hammer falling inches *Number of blows required to drive Crandall Sampler 12 inches using 3 pound hammer falling 18 inches **Photo Ionization Detector used for OVA readings Downhole Test: PMT = Pressuremeter G128 Field Tech: HTY Prepared/Date: YN 6/16/11 Checked/Date: HP/PE 9/19/11 Project No.: 4361 Figure: A2.24c

8 LA METRO PBTUNNEL ZONE S:\131 GEOTECH\GINTW\LIBRARY MACTEC JUNE11.GLB G:\PROJECT_DIRECTORIES\43\\61_METRO_WESTSIDE_EXTENSION\ GEOTECHNICAL DESIGN\3.2 ALL FIELD NOTES\GINT LOG\ROTARY WASH GINT LOGS\4361_(1139).GPJ 12/2/ Wilshire / La Cienega Station Fugro / CME 5/16/11 5/18/11 CH 8inch thick Asphalt Concrete over inch thick Portland Cement Concrete FILL [Af] SANDY LEAN AY moist, light olive yellow, fine to coarse sand, trace gravel (up to ½ inch in size), porous More sand Sta 567+, Lt feet 47/8 inches G feet GROUNDWATER READINGS Groundwater level measured at 31 feet below the ground surface on 5/17/11. SAN PEDRO FORMATION [Qsp] LEAN AY with SAND stiff, moist, dark olive, trace fine sand, trace medium SANDY LEAN AY very stiff, moist, light olive to olive, fine sand FAT AY stiff, moist, olive gray, some fine sand, trace medium, trace calcium carbonate nodules SANDY LEAN AY very stiff, moist, olive gray, fine to medium sand, trace calcium carbonate nodules AYEY SAND medium dense, wet, light olive gray to greenish gray, fine to mediumgrained, trace coarse, trace shell fragments, trace black manganese stains, trace calcium carbonate nodules Field Tech: LH Prepared/Date: YN 6/17/11 Checked/Date: HP/LT 9/19/11 Project No.: 4361 Figure: A2.a

9 LA METRO PBTUNNEL ZONE S:\131 GEOTECH\GINTW\LIBRARY MACTEC JUNE11.GLB G:\PROJECT_DIRECTORIES\43\\61_METRO_WESTSIDE_EXTENSION\ GEOTECHNICAL DESIGN\3.2 ALL FIELD NOTES\GINT LOG\ROTARY WASH GINT LOGS\4361_(1139).GPJ 12/2/11 Wilshire / La Cienega Station Fugro / CME 5/16/11 5/18/11 Sta 567+, Lt feet 47/8 inches G feet GROUNDWATER READINGS Groundwater level measured at 31 feet below the ground surface on 5/17/11. SANDY LEAN AY very stiff, moist, greenish gray, fine sand, some calcium carbonate nodules SILTY SAND with GRAVEL very dense, moist to wet, greenish gray, fine to coarsegrained, gravel (up to ½ inch in size) SANDY LEAN AY very stiff, moist, greenish gray, fine sand, trace calcium carbonate nodules SILTY SAND medium dense, wet, fine to mediumgrained, trace coarse, trace coarse gravel (up to ½ inch in size) SILTY SAND with GRAVEL dense, wet, greenish gray, fine to coarsegrained, some fine to coarse gravel (up to 1½ inches in size) SILT with SAND hard, moist, greenish gray, fine sand, trace medium to coarse, some mica Field Tech: LH Prepared/Date: YN 6/17/11 Checked/Date: HP/LT 9/19/11 Project No.: 4361 Figure: A2.b

10 LA METRO PBTUNNEL ZONE S:\131 GEOTECH\GINTW\LIBRARY MACTEC JUNE11.GLB G:\PROJECT_DIRECTORIES\43\\61_METRO_WESTSIDE_EXTENSION\ GEOTECHNICAL DESIGN\3.2 ALL FIELD NOTES\GINT LOG\ROTARY WASH GINT LOGS\4361_(1139).GPJ 12/2/ Fugro / CME 5/16/11 5/18/11 CH FAT AY with SAND stiff, moist, light greenish gray, fine sand, trace calcium carbonate nodules Becomes very stiff, some fine to medium sand, trace coarse, weakly cemented, some gravel (up to 1/4 inch in size) Becomes hard Sta 567+, Lt feet 47/8 inches 139 feet GROUNDWATER READINGS Groundwater level measured at 31 feet below the ground surface on 5/17/11. AYEY SAND medium dense, moist, greenish gray, fine to coarsegrained, trace fine to coarse gravel (up to ½ inch in size), trace calcium carbonate nodules SANDY LEAN AY very stiff, moist, greenish gray, fine to medium sand, trace silt, trace calcium carbonate nodules Becomes stiff, less calcium carbonate nodules, more clay G129 AYEY SAND dense, moist, greenish gray, finegrained, trace calcium carbonate nodules Field Tech: LH Prepared/Date: YN 6/17/11 Checked/Date: HP/LT 9/19/11 Project No.: 4361 Figure: A2.c

11 LA METRO PBTUNNEL ZONE S:\131 GEOTECH\GINTW\LIBRARY MACTEC JUNE11.GLB G:\PROJECT_DIRECTORIES\43\\61_METRO_WESTSIDE_EXTENSION\ GEOTECHNICAL DESIGN\3.2 ALL FIELD NOTES\GINT LOG\ROTARY WASH GINT LOGS\4361_(1139).GPJ 12/2/ Fugro / CME 5/16/11 5/18/11 END OF BORING AT 1 FEET NOTES: Sta 567+, Lt feet 47/8 inches Hand augered upper 7 feet to avoid damage to utilites. Borehole grouted with cementbentonite slurry and patched with asphalt concrete. "N" Value Standard Penetration Test: Number of blows required to drive the SPT sampler 18 inches using a 1 pound automatic hammer falling inches *Number of blows required to drive the Crandall Sampler 12 inches using a 1 pound automatic hammer falling inches **Photo Ionization Detector used for OVA readings G feet GROUNDWATER READINGS Groundwater level measured at 31 feet below the ground surface on 5/17/11. Field Tech: LH Prepared/Date: YN 6/17/11 Checked/Date: HP/LT 9/19/11 Project No.: 4361 Figure: A2.d

12 LA METRO PBTUNNEL ZONE S:\131 GEOTECH\GINTW\LIBRARY MACTEC JUNE11.GLB G:\PROJECT_DIRECTORIES\43\\61_METRO_WESTSIDE_EXTENSION\ GEOTECHNICAL DESIGN\3.2 ALL FIELD NOTES\GINT LOG\ROTARY WASH GINT LOGS\4361_(1139).GPJ 12/2/ Wilshire / La Cienega Station Push 5 6 C & L Drilling / Meyhew 0 4//11 4/22/11 CH Sta 5+12, Rt 5 feet 47/8 inches 6inch thick Asphalt Concrete over 12inch thick Portland Cement Concrete FILL [Af] AYEY SAND moist, brown, fine to coarsegrained FAT AY with SAND moist, brown, fine to coarse sand QUATERNARY YOUNGER ALLUVIUM [Qal] AYEY SAND very loose, moist, olive brown, fine to mediumgrained LEAN AY medium stiff, moist, gray to greenish gray, trace fine sand SANDY LEAN AY medium stiff, wet, brown, fine to coarse sand, (disturbed sample recovered) SILTY SAND medium dense, moist, brown, finegrained, layer of Poorly Graded Sand, medium to coarse SAN PEDRO FORMATION [Qsp] LEAN AY medium stiff, moist, gray, abundant calcium carbonate nodules Becomes very stiff, (sample not recovered) Becomes stiff, (sample not recovered) G1B 138 feet GROUNDWATER READINGS Drilling mud bailed on 4/21/11. Groundwater level measured at 22 feet below the ground surface on 4/22/11. Field Tech: LH Prepared/Date: JF 6/27/11 Checked/Date: LT/PE 9/27/11 Project No.: 4361 Figure: A2.26a

13 LA METRO PBTUNNEL ZONE S:\131 GEOTECH\GINTW\LIBRARY MACTEC JUNE11.GLB G:\PROJECT_DIRECTORIES\43\\61_METRO_WESTSIDE_EXTENSION\ GEOTECHNICAL DESIGN\3.2 ALL FIELD NOTES\GINT LOG\ROTARY WASH GINT LOGS\4361_(1139).GPJ 12/2/11 Wilshire / La Cienega Station C & L Drilling / Meyhew 0 4//11 4/22/11 CH CH Sta 5+12, Rt 5 feet 47/8 inches Becomes very stiff, greenish gray, occasional fine sand Becomes olive greenish gray, fine to medium sand, trace calcium carbonate FAT AY stiff, moist, light greenish gray, trace fine sand AYEY SAND with GRAVEL dense, moist, light greenish gray, fine to mediumgrained, trace coarse, fine to coarse gravel (up to 1 inch in size) SANDY SILT stiff, moist, light greenish gray, fine to medium sand, occasional coarse G1B 138 feet GROUNDWATER READINGS Drilling mud bailed on 4/21/11. Groundwater level measured at 22 feet below the ground surface on 4/22/11. SILTY AY very stiff, moist, greenish gray, trace fine sand FAT AY with SAND stiff, moist, dark greenish gray, fine to medium sand SILT very stiff, moist, olive greenish gray, trace fine gravel, trace calcium carbonate nodules Field Tech: LH Prepared/Date: JF 6/27/11 Checked/Date: LT/PE 9/27/11 Project No.: 4361 Figure: A2.26b

14 LA METRO PBTUNNEL ZONE S:\131 GEOTECH\GINTW\LIBRARY MACTEC JUNE11.GLB G:\PROJECT_DIRECTORIES\43\\61_METRO_WESTSIDE_EXTENSION\ GEOTECHNICAL DESIGN\3.2 ALL FIELD NOTES\GINT LOG\ROTARY WASH GINT LOGS\4361_(1139).GPJ 12/2/ C & L Drilling / Meyhew 0 4//11 4/22/11 SILTY SAND dense, moist to wet, greenish gray, finegrained, trace mica SILTY AY hard, moist, greenish gray, trace fine sand Thin layer of Sandy Lean Clay, fine to medium sand LEAN AY hard, moist, light gray, trace fine to medium sand, trace calcium carbonate nodules (Sample not recovered) More sand SANDY LEAN AY stiff, moist, greenish gray, fine sand, trace medium Less sand Alternating with layers of Lean Clay, trace fine sand, trace calcium carbonate nodules More sand Sta 5+12, Rt 5 feet 47/8 inches SANDY SILT very stiff, moist, greenish gray, fine to medium sand, trace fine gravel, trace clay, thin layer of Silty Sand LEAN AY with SAND very stiff, moist, greenish gray, fine to medium sand, trace calcium carbonate nodules SILTY SAND dense, moist to wet, gray, fine to mediumgrained G1B 138 feet GROUNDWATER READINGS Drilling mud bailed on 4/21/11. Groundwater level measured at 22 feet below the ground surface on 4/22/11. Field Tech: LH Prepared/Date: JF 6/27/11 Checked/Date: LT/PE 9/27/11 Project No.: 4361 Figure: A2.26c

15 LA METRO PBTUNNEL ZONE S:\131 GEOTECH\GINTW\LIBRARY MACTEC JUNE11.GLB G:\PROJECT_DIRECTORIES\43\\61_METRO_WESTSIDE_EXTENSION\ GEOTECHNICAL DESIGN\3.2 ALL FIELD NOTES\GINT LOG\ROTARY WASH GINT LOGS\4361_(1139).GPJ 12/2/ C & L Drilling / Meyhew 0 4//11 4/22/ Thin layer of Silt END OF BORING AT 121 FEET NOTES: Sta 5+12, Rt 5 feet 47/8 inches Hand augered upper feet to avoid damage to utilities. Borehole grouted with cementbentonite slurry and patched with asphalt concrete. "N" Value Standard Penetration Test: Number of blows required to drive the SPT sampler 18 inches using a 1 pound automatic hammer falling inches *Number of blows required to drive the Crandall Sampler 12 inches using a 3 pound hammer falling 18 inches **Photo Ionization Detector used for OVA readings G1B 138 feet GROUNDWATER READINGS Drilling mud bailed on 4/21/11. Groundwater level measured at 22 feet below the ground surface on 4/22/11. Field Tech: LH Prepared/Date: JF 6/27/11 Checked/Date: LT/PE 9/27/11 Project No.: 4361 Figure: A2.26d

16 LA METRO PBTUNNEL ZONE S:\131 GEOTECH\GINTW\LIBRARY MACTEC JUNE11.GLB G:\PROJECT_DIRECTORIES\43\\61_METRO_WESTSIDE_EXTENSION\ GEOTECHNICAL DESIGN\3.2 ALL FIELD NOTES\GINT LOG\NEW TEMPLATE MARCH 14, 11\4361_(1139).GPJ /18/ Wilshire / La Cienega Station PMT C & L Drilling / Mayhew 0 4//11 4/27/11 SW CH Sta 573+, Lt ' feet 47/8 inches 8inch thick Asphalt Concrete over 7inch thick Portland Cement Concrete and 12inch thick Base Course QUATERNARY YOUNGER ALUVIUM [Qal] SILTY AY stiff, moist, dark gray to black, trace fine sand QUATERNARY OLDER ALUVIUM [Qalo] AYEY SAND medium dense, moist, olive brown, fine to coarsegrained, trace fine gravel (up to 3/8 inch in size) WELL GRADED SAND medium dense, moist, gray, fine to coarsegrained, trace gravel (up to 1/4 inch in size) SAN PEDRO FORMATION [Qsp] SILT stiff, moist, light olive gray, trace fine sand, some tar odor LEAN AY very stiff, moist, olive gray G feet GROUNDWATER READINGS Drilling mud bailed on 4/26/11. Groundwater level measured at 21½ feet below the ground surface on 4/27/11. FAT AY stiff, moist, bluish gray, trace shell fragments, some fine sand, trace medium to coarse Field Tech: AR Prepared/Date: YN 5/17/11 Checked/Date: LT/PE 9/22/11 Project No.: 4361 Figure: A2.27a

17 LA METRO PBTUNNEL ZONE S:\131 GEOTECH\GINTW\LIBRARY MACTEC JUNE11.GLB G:\PROJECT_DIRECTORIES\43\\61_METRO_WESTSIDE_EXTENSION\ GEOTECHNICAL DESIGN\3.2 ALL FIELD NOTES\GINT LOG\NEW TEMPLATE MARCH 14, 11\4361_(1139).GPJ /18/11 Wilshire / La Cienega Station PMT C & L Drilling / Mayhew 0 4//11 4/27/11 SANDY SILT stiff, moist, greenish gray, fine to medium sand SANDY LEAN AY stiff, moist, greenish gray, trace sand Becomes hard, gray, trace calcium carbonate nodules SILTY SAND medium dense, moist, bluish gray, fine to mediumgrained, trace coarse, trace fine gravel (up to 3/8 inch in size) Becomes greenish gray, some clay, fine to medium sand, trace gravel (up to 1/4 inch in size) AYEY SAND with GRAVEL medium dense, moist, greenish gray, fine to mediumgrained, gravel (up to 1 inch in size) Becomes gray to black Sta 573+, Lt ' feet 47/8 inches G feet GROUNDWATER READINGS Drilling mud bailed on 4/26/11. Groundwater level measured at 21½ feet below the ground surface on 4/27/11. Field Tech: AR Prepared/Date: YN 5/17/11 Checked/Date: LT/PE 9/22/11 Project No.: 4361 Figure: A2.27b

18 LA METRO PBTUNNEL ZONE S:\131 GEOTECH\GINTW\LIBRARY MACTEC JUNE11.GLB G:\PROJECT_DIRECTORIES\43\\61_METRO_WESTSIDE_EXTENSION\ GEOTECHNICAL DESIGN\3.2 ALL FIELD NOTES\GINT LOG\NEW TEMPLATE MARCH 14, 11\4361_(1139).GPJ /18/ C & L Drilling / Mayhew 0 4//11 4/27/11 MH SILTY SAND very dense, moist, bluish gray, fine to coarsegrained, some fine gravel (up to ¾ inch in size) Becomes medium dense, some tar odor Becomes light gray, some coarse gravel Becomes greenish gray, some fine gravel (up to 1/2 inch in size) ELASTIC SILT very stiff, wet, bluish gray, trace sand Becomes hard Sta 573+, Lt ' feet 47/8 inches SANDY SILT hard, moist, gray, fine to medium sand, (disturbed sample) G feet GROUNDWATER READINGS Drilling mud bailed on 4/26/11. Groundwater level measured at 21½ feet below the ground surface on 4/27/11. Field Tech: AR Prepared/Date: YN 5/17/11 Checked/Date: LT/PE 9/22/11 Project No.: 4361 Figure: A2.27c

19 LA METRO PBTUNNEL ZONE S:\131 GEOTECH\GINTW\LIBRARY MACTEC JUNE11.GLB G:\PROJECT_DIRECTORIES\43\\61_METRO_WESTSIDE_EXTENSION\ GEOTECHNICAL DESIGN\3.2 ALL FIELD NOTES\GINT LOG\NEW TEMPLATE MARCH 14, 11\4361_(1139).GPJ /18/ Becomes bluish gray C & L Drilling / Mayhew 0 4//11 4/27/11 END OF BORING AT 121½ FEET NOTES: Sta 573+, Lt ' feet 47/8 inches Hand augered upper 5 feet to avoid damage to utilities. Borehole grouted with cementbentonite slurry and patched with asphalt concrete. "N" Value Standard Penetration Test: Number of blows required to drive the SPT sampler 18 inches using a 1 pound automatic hammer falling inches *Number of blows required to drive the Crandall Sampler 12 inches using a 0 pound hammer falling 18 inches **Photo Ionization Detector used for OVA readings Downhole Test: PMT = Pressuremeter G feet GROUNDWATER READINGS Drilling mud bailed on 4/26/11. Groundwater level measured at 21½ feet below the ground surface on 4/27/11. Field Tech: AR Prepared/Date: YN 5/17/11 Checked/Date: LT/PE 9/22/11 Project No.: 4361 Figure: A2.27d

20 LA METRO PBTUNNEL ZONE S:\131 GEOTECH\GINTW\LIBRARY MACTEC JUNE11.GLB G:\PROJECT_DIRECTORIES\43\\61_METRO_WESTSIDE_EXTENSION\ GEOTECHNICAL DESIGN\3.2 ALL FIELD NOTES\GINT LOG\NEW TEMPLATE MARCH 14, 11\4361_(1139).GPJ /18/ C & L Drilling / Mayhew 0 4/14/11 and 4//11 MH 5inch thick Asphalt Concrete over 12inch thick Portland Cement Concrete FILL [Af] SITLY AY moist, dark brown to black, expansive SANDY LEAN AY moist, light olive brown, fine to medium sand QUATERNARY YOUNGER ALLUVIUM [Qal] LEAN AY medium stiff to stiff, moist, olive brown, trace sand Becomes dark olive brown to brown, trace fine sand, alternating layers of Silty Clay Becomes olive brown Sta , Lt feet 47/8 inches QUATERNARY OLDER ALLUVIUM [Qalo] LEAN AY with SAND stiff, moist, olive brown, fine sand, occasional medium Becomes very stiff, olive brown, fine sand G feet GROUNDWATER READINGS Drilling mud bailed on 4/14/11. Groundwater level measured at 28 feet below the ground surface. SAN PEDRO FORMATION [Qsp] ELASTIC SILT stiff, moist, gray, some fine sand, occasional medium, trace calcium carbonate nodules Field Tech: LH Prepared/Date: YN 9/2/11 Checked/Date: LT/PE 9/26/11 Project No.: 4361 Figure: A2.28a

21 LA METRO PBTUNNEL ZONE S:\131 GEOTECH\GINTW\LIBRARY MACTEC JUNE11.GLB G:\PROJECT_DIRECTORIES\43\\61_METRO_WESTSIDE_EXTENSION\ GEOTECHNICAL DESIGN\3.2 ALL FIELD NOTES\GINT LOG\NEW TEMPLATE MARCH 14, 11\4361_(1139).GPJ /18/11 Wilshire / La Cienega Station C & L Drilling / Mayhew 0 4/14/11 and 4//11 SP SP Sta , Lt feet 47/8 inches Becomes very stiff, greenish gray, trace fine and medium sand Becomes light olive gray, trace calcium carbonate nodules SANDY LEAN AY hard, wet, gray, fine to coarse sand SILTY SAND very dense, moist, gray, fine to coarsegrained, trace fine gravel (up to 3/8 inch in size) Some fine to medium gravel Gravel (up to 1½ inches in size), (sample not recovered) LEAN AY hard, olive gray, trace fine to medium sand POORLY GRADED SAND with AY dense, olive gray, fine to mediumgrained, trace coarse POORLY GRADED SAND very dense, wet, gray, fine to coarsegrained, trace fine gravel (up to 1/8 inch in size), some clay Becomes medium to coarsegrained G feet GROUNDWATER READINGS Drilling mud bailed on 4/14/11. Groundwater level measured at 28 feet below the ground surface. Field Tech: LH Prepared/Date: YN 9/2/11 Checked/Date: LT/PE 9/26/11 Project No.: 4361 Figure: A2.28b

22 LA METRO PBTUNNEL ZONE S:\131 GEOTECH\GINTW\LIBRARY MACTEC JUNE11.GLB G:\PROJECT_DIRECTORIES\43\\61_METRO_WESTSIDE_EXTENSION\ GEOTECHNICAL DESIGN\3.2 ALL FIELD NOTES\GINT LOG\NEW TEMPLATE MARCH 14, 11\4361_(1139).GPJ /18/ /9" /8" 86/9" C & L Drilling / Mayhew 0 4/14/11 and 4//11 AYEY SAND very dense, wet, gray, fine to coarsegrained, some clay, occasional gravel (up to 1/8 inch in size) (Sample not recovered) Becomes medium to coarsegrained (Sample not recovered) Sta , Lt feet 47/8 inches SANDY SILT hard, moist, gray, finegrained Becomes greenish gray, very fine sand LEAN AY with SAND hard, moist, gray, fine sand, trace medium Becomes light gray, trace calcium carbonate nodules AYEY SAND very dense, moist, light olive gray, fine to mediumgrained END OF BORING AT 111½ FEET NOTES: Hand augered upper 5½ feet to avoid damage to utilities. Borehole grouted with cementbentonite slurry and patched with asphalt concrete. "N" Value Standard Penetration Test: Number of blows required to drive the SPT sampler 18 inches using a 1 pound automatic hammer falling inches *Number of blows required to drive the Crandall Sampler 12 inches using a 0 pound hammer falling 18 inches **Photo Ionization Detector used for OVA readings G feet GROUNDWATER READINGS Drilling mud bailed on 4/14/11. Groundwater level measured at 28 feet below the ground surface. Field Tech: LH Prepared/Date: YN 9/2/11 Checked/Date: LT/PE 9/26/11 Project No.: 4361 Figure: A2.28c

23 LA METRO PBTUNNEL ZONE S:\131 GEOTECH\GINTW\LIBRARY MACTEC JUNE11.GLB G:\PROJECT_DIRECTORIES\43\\61_METRO_WESTSIDE_EXTENSION\ GEOTECHNICAL DESIGN\3.2 ALL FIELD NOTES\GINT LOG\NEW TEMPLATE MARCH 14, 11\4361_(1139).GPJ /18/ /" Push C & L Drilling / Mayhew 0 3/14/11 3/16/11 Sta 584+, Lt feet 47/8 inches 6inch thick Asphalt Concrete over 12inch thick Portland Cement Concrete QUATERNARY YOUNGER ALLUVIUM [Qal] SANDY LEAN AY very soft, moist, dark brownish gray, trace slate gravel Becomes dark gray, trace fine gravel Becomes stiff, light olive brown, fine to medium sand QUATERNARY OLDER ALLUVIUM [Qalo] SANDY LEAN AY stiff, moist, light brown, trace calcium carbonate nodules SAN PEDRO FORMATION [Qsp] SANDY LEAN AY stiff, moist, gray, fine sand Becomes very stiff, light brown to gray SANDY SILT stiff, moist to wet, gray, fine sand G feet GROUNDWATER READINGS Drilling mud bailed on 3//11. Groundwater level measured at 33 feet below the ground surface on 3/16/11. LEAN AY very stiff, moist, olive brown, trace fine sand, iron oxide stains Field Tech: DW Prepared/Date: JF 3/29/11 Checked/Date: LT/PE 9/26/11 Project No.: 4361 Figure: A2.29a

24 LA METRO PBTUNNEL ZONE S:\131 GEOTECH\GINTW\LIBRARY MACTEC JUNE11.GLB G:\PROJECT_DIRECTORIES\43\\61_METRO_WESTSIDE_EXTENSION\ GEOTECHNICAL DESIGN\3.2 ALL FIELD NOTES\GINT LOG\NEW TEMPLATE MARCH 14, 11\4361_(1139).GPJ /18/11 Tunnel C & L Drilling / Mayhew 0 3/14/11 3/16/11 MH Alternating with layers of Silty Sand, gray ELASTIC SILT very stiff, moist to wet, gray, trace fine sand Some iron oxide stains Sta 584+, Lt feet 47/8 inches LEAN AY very stiff, moist to wet, bluish gray, trace fine gravel Alternating with layers of Silty Sand, brown SILT with SAND very stiff, moist, brown, micaceous SANDY LEAN AY very stiff, moist, light brown to light gray Becomes gray, fine to medium sand G feet GROUNDWATER READINGS Drilling mud bailed on 3//11. Groundwater level measured at 33 feet below the ground surface on 3/16/11. SILTY SAND with GRAVEL dense, moist, gray, fine to mediumgrained, gravel (up to 1½ inches in size) SANDY LEAN AY very stiff, moist, gray to bluish gray, fine sand SANDY SILT very stiff, moist, gray to bluish gray, fine sand, trace gravel (up to 3/8 inch in size) Field Tech: DW Prepared/Date: JF 3/29/11 Checked/Date: LT/PE 9/26/11 Project No.: 4361 Figure: A2.29b

25 LA METRO PBTUNNEL ZONE S:\131 GEOTECH\GINTW\LIBRARY MACTEC JUNE11.GLB G:\PROJECT_DIRECTORIES\43\\61_METRO_WESTSIDE_EXTENSION\ GEOTECHNICAL DESIGN\3.2 ALL FIELD NOTES\GINT LOG\NEW TEMPLATE MARCH 14, 11\4361_(1139).GPJ /18/11 Tunnel C & L Drilling / Mayhew 0 3/14/11 3/16/11 SW SW Sta 584+, Lt feet 47/8 inches SILTY SAND very dense, moist, gray to bluish gray, fine to coarsegrained, alternating thin layer of Sandy Silt AYEY SAND very dense, moist to wet, gray, fine to coarsegrained, trace gravel (up to 3/8 inch in size) SILTY SAND dense, moist, gray, fine to coarsegrained, with thin layers of Lean Clay Becomes medium dense, finegrained, with thin layer of Silt Alternating with layers of Lean Clay, very stiff SILT very stiff, moist, dark gray, micaceous, trace clay WELL GRADED SAND dense, moist, gray, fine to mediumgrained, trace coarse SILTY SAND dense, moist to wet, gray, finegrained, micaceous WELL GRADED SAND dense, moist to wet, gray, fine to coarsegrained END OF BORING AT 111 FEET NOTES: Borehole grouted with cementbentonite slurry and patched with asphalt concrete. "N" Value Standard Penetration Test: Number of blows required to drive the SPT sampler 18 inches using a 1 pound automatic hammer falling inches *Number of blows required to drive the Crandall Sampler 12 inches using a 3 pound hammer falling 18 inches **Photo Ionization Detector used for OVA readings G feet GROUNDWATER READINGS Drilling mud bailed on 3//11. Groundwater level measured at 33 feet below the ground surface on 3/16/11. Field Tech: DW Prepared/Date: JF 3/29/11 Checked/Date: LT/PE 9/26/11 Project No.: 4361 Figure: A2.29c

26 LA METRO PBTUNNEL ZONE S:\131 GEOTECH\GINTW\LIBRARY MACTEC JUNE11.GLB G:\PROJECT_DIRECTORIES\43\\61_METRO_WESTSIDE_EXTENSION\ GEOTECHNICAL DESIGN\3.2 ALL FIELD NOTES\GINT LOG\NEW TEMPLATE MARCH 14, 11\4361_(1139).GPJ /18/ Push C & L Drilling / Mayhew 0 3/29/11, 3//11, 4/8/11 GROUNDWATER READINGS SP Sta 5+, Lt 27 feet 47/8 inches 6inch thick Asphalt Concrete over 12inch thick Portland Cement Concrete, No Base Course QUATERNARY YOUNGER ALLUVIUM [Qal] SANDY SILT very soft, moist, brownish gray, with slate gravel Trace sand, dark olive brown LEAN AY stiff, moist, dark gray, trace sand Becomes soft, (sample not recovered) QUATERNARY OLDER ALLUVIUM [Qalo] SANDY LEAN AY very stiff, moist, gray, fine to medium sand POORLY GRADED SAND medium dense, moist, gray and brown, fine to mediumgrained, trace fine gravel AYEY SAND medium dense, moist, gray and brown, fine to mediumgrained Becomes brown, finegrained SANDY LEAN AY very stiff, moist, brown SANDY SILT stiff, moist, brown Alternating with layers of Silty Sand, brown, fine to mediumgrained LEAN AY stiff, moist, dark olive brown, trace sand G feet Drilling mud bailed on 4/8/11. Groundwater level measured at 31 feet below the ground surface minutes after bailing of drilling mud. Field Tech: DW Prepared/Date: JF 5/18/11 Checked/Date: LT/PE 9/27/11 Project No.: 4361 Figure: A2.a

27 LA METRO PBTUNNEL ZONE S:\131 GEOTECH\GINTW\LIBRARY MACTEC JUNE11.GLB G:\PROJECT_DIRECTORIES\43\\61_METRO_WESTSIDE_EXTENSION\ GEOTECHNICAL DESIGN\3.2 ALL FIELD NOTES\GINT LOG\NEW TEMPLATE MARCH 14, 11\4361_(1139).GPJ /18/ NV NV NV C & L Drilling / Mayhew 0 3/29/11, 3//11, 4/8/11 GROUNDWATER READINGS SILT with SAND stiff, moist, brown, fine sand, alternating with layers of Silty Sand Becomes very stiff, gray LEAN AY very stiff, moist, gray, trace sand Becomes greenish gray Becomes gray, trace sand (Sample not recovered) Sta 5+, Lt 27 feet 47/8 inches 148 feet Drilling mud bailed on 4/8/11. Groundwater level measured at 31 feet below the ground surface minutes after bailing of drilling mud. Alternating with layers of Sandy Lean Clay, light green, trace calcium carbonate nodules G134 Field Tech: DW Prepared/Date: JF 5/18/11 Checked/Date: LT/PE 9/27/11 Project No.: 4361 Figure: A2.b

28 LA METRO PBTUNNEL ZONE S:\131 GEOTECH\GINTW\LIBRARY MACTEC JUNE11.GLB G:\PROJECT_DIRECTORIES\43\\61_METRO_WESTSIDE_EXTENSION\ GEOTECHNICAL DESIGN\3.2 ALL FIELD NOTES\GINT LOG\NEW TEMPLATE MARCH 14, 11\4361_(1139).GPJ /18/ /2" C & L Drilling / Mayhew 0 3/29/11, 3//11, 4/8/11 GROUNDWATER READINGS SP Becomes brown and olive brown, fine to medium sand Fine sand AYEY SAND dense, moist, olive brown, fine to mediumgrained, alternating with layers of Sandy Lean Clay SILTY SAND dense, moist, brown, fine to mediumgrained, some coarse, trace gravel (up to 3/8 inch in size) SAN PEDRO FORMATION [Qsp] POORLY GRADED SAND very dense, moist, olive brown, fine to coarsegrained SILTY SAND moist, gray, fine to mediumgrained, alternating with layers of Sandy Silt SILT stiff, moist, gray, trace fine sand Becomes hard Sta 5+, Lt 27 feet 47/8 inches END OF BORING AT 111½ FEET NOTES: Hand augered upper 5 feet to avoid damage to utilities. Borehole grouted with cementbentonite slurry and patched with asphalt concrete. "N" Value Standard Penetration Test: Number of blows required to drive the SPT sampler 18 inches using a 1 pound automatic hammer falling inches *Number of blows required to drive the Crandall Sampler 12 inches using a 3 pound hammer falling 18 inches **Photo Ionization Detector used for OVA readings Downhole Test: NV = Noise/Vibration G feet Drilling mud bailed on 4/8/11. Groundwater level measured at 31 feet below the ground surface minutes after bailing of drilling mud. Field Tech: DW Prepared/Date: JF 5/18/11 Checked/Date: LT/PE 9/27/11 Project No.: 4361 Figure: A2.c

29 LA METRO PBTUNNEL ZONE S:\131 GEOTECH\GINTW\LIBRARY MACTEC JUNE11.GLB G:\PROJECT_DIRECTORIES\43\\61_METRO_WESTSIDE_EXTENSION\ GEOTECHNICAL DESIGN\3.2 ALL FIELD NOTES\GINT LOG\NEW TEMPLATE MARCH 14, 11\4361_(1139).GPJ /18/ Fugro / CME 5/19/11 and 5//11 CH Sta 594+, Rt 5 feet 47/8 inches 7inch thick Asphalt Concrete over 8inch thick Portland Cement Concrete FILL [Af] AYEY SAND moist, olive brown, fine to mediumgrained, some coarse, some gravel (up to 1 inch in size), trace roots QUATERNARY YOUNGER ALUVIUM [Qal] SANDY FAT AY soft, moist, dark olive brown, fine sand, trace gravel (up to ½ inch in size) Becomes medium stiff QUATERNARY OLDER ALLUVIUM [Qalo] AYEY SAND loose, moist, olive to olive yellow, fine to coarsegrained, trace gravel (up to ½ inch in size), trace iron oxide stains SANDY LEAN AY stiff, moist, dark olive, fine to medium sand, trace gravel (up to ½ inch in size) G1 3 feet GROUNDWATER READINGS Drilling mud bailed on 5/19/11. Groundwater level measured at feet below the ground surface on 5//11. AYEY SAND with GRAVEL medium dense, moist, olive, fine to coarsegrained, fine slate gravel (up to 3/4 inch in size), trace iron oxide stains SILTY AY stiff, moist, olive brown, fine to coarse sand, trace gravel (up to 1/4 inch in size) AYEY SAND medium dense, moist, olive yellow, fine to coarsegrained, trace gravel (up to 1/4 inch in size) LEAN AY with SAND stiff, moist, olive, fine sand, some coarse, trace gravel (up to 1/4 inch in size) Field Tech: LH Prepared/Date: YN 6/27/11 Checked/Date: HP/LT 9/22/11 Project No.: 4361 Figure: A2.31a

30 LA METRO PBTUNNEL ZONE S:\131 GEOTECH\GINTW\LIBRARY MACTEC JUNE11.GLB G:\PROJECT_DIRECTORIES\43\\61_METRO_WESTSIDE_EXTENSION\ GEOTECHNICAL DESIGN\3.2 ALL FIELD NOTES\GINT LOG\NEW TEMPLATE MARCH 14, 11\4361_(1139).GPJ /18/ Fugro / CME 5/19/11 and 5//11 MH CH AYEY SAND medium dense, moist, olive brown, fine to coarsegrained, some gravel (up to ½ inch in size) SANDY LEAN AY stiff, moist, olive, fine sand, some silt, trace manganese stains SANDY SILT moist, olive, fine sand ELASTIC SILT very stiff, moist, light olive to olive, trace fine sand, trace magnesium stains Becomes olive, some fine sand FAT AY with SAND very stiff to hard, moist, gray, fine sand, some silt, trace iron oxide and magnesium stains Trace calcium carbonate nodules Becomes olive brown, more fine sand, some medium to coarse Becomes light olive gray to olive Trace gravel (up to 1/4 inch in size) Becomes yellowish brown, some calcium carbonate nodules Some iron oxide stains Becomes light gray Sta 594+, Rt 5 feet 47/8 inches G1 3 feet GROUNDWATER READINGS Drilling mud bailed on 5/19/11. Groundwater level measured at feet below the ground surface on 5//11. Trace gravel (up to ½ inch in size), (sample not recovered) Field Tech: LH Prepared/Date: YN 6/27/11 Checked/Date: HP/LT 9/22/11 Project No.: 4361 Figure: A2.31b

31 LA METRO PBTUNNEL ZONE S:\131 GEOTECH\GINTW\LIBRARY MACTEC JUNE11.GLB G:\PROJECT_DIRECTORIES\43\\61_METRO_WESTSIDE_EXTENSION\ GEOTECHNICAL DESIGN\3.2 ALL FIELD NOTES\GINT LOG\NEW TEMPLATE MARCH 14, 11\4361_(1139).GPJ /18/11 Tunnel /11" Fugro / CME 5/19/11 and 5//11 SW MH SANDY LEAN AY very stiff, moist, olive to light gray, fine to medium sand, trace coarse WELL GRADED SAND with GRAVEL medium dense, wet, yellowish brown, finegrained, fine gravel (up to 3/4 inch in size) SILTY SAND with GRAVEL dense, wet, yellowish brown, fine to coarsegrained, fine to coarse gravel (up to 1 inch in size) SAN PEDRO FORMATION [Qsp] SILTY SAND very dense, moist, olive, finegrained, micacious Becomes dense ELASTIC SILT hard, moist, greenish gray, trace fine sand, trace magnesium stains Becomes dark greenish gray Becomes very stiff Sta 594+, Rt 5 feet 47/8 inches G1 3 feet GROUNDWATER READINGS Drilling mud bailed on 5/19/11. Groundwater level measured at feet below the ground surface on 5//11. Field Tech: LH Prepared/Date: YN 6/27/11 Checked/Date: HP/LT 9/22/11 Project No.: 4361 Figure: A2.31c

32 LA METRO PBTUNNEL ZONE S:\131 GEOTECH\GINTW\LIBRARY MACTEC JUNE11.GLB G:\PROJECT_DIRECTORIES\43\\61_METRO_WESTSIDE_EXTENSION\ GEOTECHNICAL DESIGN\3.2 ALL FIELD NOTES\GINT LOG\NEW TEMPLATE MARCH 14, 11\4361_(1139).GPJ /18/ Fugro / CME 5/19/11 and 5//11 END OF BORING AT 1 FEET NOTES: Sta 594+, Rt 5 feet 47/8 inches Hand augered upper 9 feet to avoid damage to utilities. Borehole grouted with cementbentonite slurry and patched with asphalt concrete. "N" Value Standard Penetration Test: Number of blows required to drive the SPT sampler 18 inches using a 1 pound automatic hammer falling inches *Number of blows required to drive the Crandall Sampler 12 inches using a 1 pound automatic hammer falling inches **Photo Ionization Detector used for OVA readings G1 3 feet GROUNDWATER READINGS Drilling mud bailed on 5/19/11. Groundwater level measured at feet below the ground surface on 5//11. Field Tech: LH Prepared/Date: YN 6/27/11 Checked/Date: HP/LT 9/22/11 Project No.: 4361 Figure: A2.31d

33 LA METRO PBTUNNEL ZONE S:\131 GEOTECH\GINTW\LIBRARY MACTEC JUNE11.GLB G:\PROJECT_DIRECTORIES\43\\61_METRO_WESTSIDE_EXTENSION\ GEOTECHNICAL DESIGN\3.2 ALL FIELD NOTES\GINT LOG\NEW TEMPLATE MARCH 14, 11\4361_(1139).GPJ /18/ /" 33/8" Push C & L Drilling / Mayhew 0 4//11 and 4/26/11 Sta 597+, Lt feet 47/8 inches G136 9 feet GROUNDWATER READINGS Drilling mud bailed on 4//11. Groundwater level measured at 24½ feet below the ground surface. 6inch thick Asphalt Concrete over 12inch thick Concrete, no Base Course FILL [Af] AYEY SAND moist, dark brown, fine to mediumgrained QUATERNARY YOUNGER ALLUVIUM [Qal] SILTY AY very soft, moist, olive brown, trace fine sand SANDY LEAN AY very stiff, moist, olive brown, fine to coarse sand, trace gravel (up to 1/8 inch in size), trace iron oxide stains Becomes medium stiff, fine to medium sand, some gravel (up to 3/4 inch in size) LEAN AY stiff, moist, olive brown, trace gravel (up to 1/8 inch in size), some iron oxide stains QUATERNARY OLDER ALLUVIUM [Qalo] LEAN AY with SAND medium stiff, olive brown and brown, fine sand, trace iron oxide stains AYEY SAND dense, moist, brown, fine to coarsegrained, trace fine gravel (up to 1/2 inch in size) Field Tech: LH Prepared/Date: YN 6//11 Checked/Date: LT/PE 9/22/11 Project No.: 4361 Figure: A2.32a

34 LA METRO PBTUNNEL ZONE S:\131 GEOTECH\GINTW\LIBRARY MACTEC JUNE11.GLB G:\PROJECT_DIRECTORIES\43\\61_METRO_WESTSIDE_EXTENSION\ GEOTECHNICAL DESIGN\3.2 ALL FIELD NOTES\GINT LOG\NEW TEMPLATE MARCH 14, 11\4361_(1139).GPJ /18/ /" C & L Drilling / Mayhew 0 4//11 and 4/26/11 CH SANDY SILTY AY stiff, moist, olive brown, fine sand, trace coarse, trace iron oxide stains SILT moist, brown, some fine sand SILTY AYEY SAND very dense, moist, brown, fine to mediumgrained, some small clay nodules SILT with SAND stiff, moist, brown, some clay LEAN AY very stiff, moist, olive brown, trace fine sand, trace iron oxide stains Becomes light brownish gray Becomes greenish gray Sta 597+, Lt feet 47/8 inches FAT AY hard, moist, gray, trace fine to medium sand, trace calcium carbonate nodules Becomes very stiff, olive gray to gray G136 9 feet GROUNDWATER READINGS Drilling mud bailed on 4//11. Groundwater level measured at 24½ feet below the ground surface. LEAN AY with SAND very stiff, moist, gray, fine to coarse sand, occasional gravel (up to 3/8 inch in size), some calcium carbonate nodules Field Tech: LH Prepared/Date: YN 6//11 Checked/Date: LT/PE 9/22/11 Project No.: 4361 Figure: A2.32b

35 LA METRO PBTUNNEL ZONE S:\131 GEOTECH\GINTW\LIBRARY MACTEC JUNE11.GLB G:\PROJECT_DIRECTORIES\43\\61_METRO_WESTSIDE_EXTENSION\ GEOTECHNICAL DESIGN\3.2 ALL FIELD NOTES\GINT LOG\NEW TEMPLATE MARCH 14, 11\4361_(1139).GPJ /18/11 Tunnel C & L Drilling / Mayhew 0 4//11 and 4/26/11 SP Sta 597+, Lt feet 47/8 inches SANDY LEAN AY stiff, moist, olive brown, fine sand, trace calcium carbonate nodules, trace iron oxide stains LEAN AY very stiff, moist, olive gray, trace fine sand AYEY SAND very dense, moist, dark olive brown to olive gray, fine to coarsegrained, some fine gravel (up to 1/2 inch in size), heavy iron oxide stains SAN PEDRO FORMATION [Qsp] LEAN AY with SAND very stiff, moist, olive brown, fine sand, trace medium, trace manganese stains POORLY GRADED SAND with SILT moist to wet, brown, finegrained, trace mica SILTY SAND medium dense to very dense, moist, olive, finegrained, occasional medium, some clay, trace manganese stains Becomes, olive to olive brown, trace mica SANDY SILT very stiff, moist, gray, fine sand G136 9 feet GROUNDWATER READINGS Drilling mud bailed on 4//11. Groundwater level measured at 24½ feet below the ground surface. Field Tech: LH Prepared/Date: YN 6//11 Checked/Date: LT/PE 9/22/11 Project No.: 4361 Figure: A2.32c

36 LA METRO PBTUNNEL ZONE S:\131 GEOTECH\GINTW\LIBRARY MACTEC JUNE11.GLB G:\PROJECT_DIRECTORIES\43\\61_METRO_WESTSIDE_EXTENSION\ GEOTECHNICAL DESIGN\3.2 ALL FIELD NOTES\GINT LOG\NEW TEMPLATE MARCH 14, 11\4361_(1139).GPJ /18/ C & L Drilling / Mayhew 0 4//11 and 4/26/11 END OF BORING AT 121 FEET NOTES: Sta 597+, Lt feet 47/8 inches Hand augered upper 9 feet to avoid damage to utilities. Borehole grouted with cement bentonite and patched with quick set cement. "N" Value Standard Penetration Test: Number of blows required to drive the SPT sampler 18 inches using a 1 pound automatic hammer falling inches *Number of blows required to drive the Crandall Sampler 12 inches using a 3 pound hammer falling 18 inches **Photo Ionization Detector used for OVA readings. G136 9 feet GROUNDWATER READINGS Drilling mud bailed on 4//11. Groundwater level measured at 24½ feet below the ground surface. Field Tech: LH Prepared/Date: YN 6//11 Checked/Date: LT/PE 9/22/11 Project No.: 4361 Figure: A2.32d

37 LA METRO PBTUNNEL ZONE S:\131 GEOTECH\GINTW\LIBRARY MACTEC JUNE11.GLB G:\PROJECT_DIRECTORIES\43\\61_METRO_WESTSIDE_EXTENSION\ GEOTECHNICAL DESIGN\3.2 ALL FIELD NOTES\GINT LOG\NEW TEMPLATE MARCH 14, 11\4361_(1139).GPJ /18/ Fugro / CME 5/23/11 and 5/24/11 Sta 0+, Lt 33 feet 47/8 inches 8inch Asphalt Concrete over 13inch thick Portland Cement Concrete FILL [Af] SILTY SAND moist, olive brown, fine to mediumgrained, trace gravel (up to ½ inch in size) Becomes yellowish brown, trace gravel (up to 1 inch in size) Becomes olive yellow, more slate gravel Some small silt nodules, trace roots QUATERNARY YOUNGER ALLUVIUM [Qal] SANDY LEAN AY medium stiff, moist, olive brown, fine to medium sand, trace gravel (up to 1/4 inch in size) Becomes stiff, more sand, some coarse, some silt QUATERNARY OLDER ALLUVIUM [Qalo] SANDY LEAN AY stiff, moist, olive brown, fine to coarse sand, trace gravel (up to 1/4 inch in size) Becomes olive to dark olive, fine to medium sand, trace coarse, some silt Becomes medium stiff, (sample not recovered) G feet GROUNDWATER READINGS Drilling mud bailed on 5/23/11. Groundwater level measured at 32½ feet below the ground surface on 5/24/11. Becomes hard, fine to coarse sand, trace gravel (up to 3/4 inch in size) Field Tech: LH Prepared/Date: YN 9/9/11 Checked/Date: LT/PE 9/26/11 Project No.: 4361 Figure: A2.33a

38 LA METRO PBTUNNEL ZONE S:\131 GEOTECH\GINTW\LIBRARY MACTEC JUNE11.GLB G:\PROJECT_DIRECTORIES\43\\61_METRO_WESTSIDE_EXTENSION\ GEOTECHNICAL DESIGN\3.2 ALL FIELD NOTES\GINT LOG\NEW TEMPLATE MARCH 14, 11\4361_(1139).GPJ /18/11 1 Tunnel Fugro / CME 5/23/11 and 5/24/11 CH CH Sta 0+, Lt 33 feet 47/8 inches AYEY SAND medium dense, moist, olive brown, fine to mediumgrained, trace coarse, trace gravel (up to ½ inch in size) Fine to coarsegrained, trace fine gravel (up to 3/8inch in size), small silt nodules SILTY SAND medium dense, moist, dark olive, fine to mediumgrained, trace coarsegrained, trace gravel (up to ½ inch in size) Becomes yellowish brown, finegrained, some medium, trace coarse, trace mica SANDY LEAN AY stiff, moist, olive, fine sand, trace medium to coarse, thin layers of silt interbedded, trace gravel (up to 1/4 inch in size) SILTY SAND moist, light gray, fine to mediumgrained SANDY FAT AY very stiff, moist, light gray, fine sand, trace medium Becomes hard, light gray to greenishgray, some medium sand, trace calcium carbonate nodules FAT AY very stiff, moist, light gray, some fine to medium sand, moderately cemented, trace calcium carbonate nodules More fine sand, more calcium carbonate nodules SANDY LEAN AY very stiff, moist, olive, fine sand, some calcium carbonate nodules, thin silt layers interbedded Becomes hard, more calcium carbonate nodules G feet GROUNDWATER READINGS Drilling mud bailed on 5/23/11. Groundwater level measured at 32½ feet below the ground surface on 5/24/11. Field Tech: LH Prepared/Date: YN 9/9/11 Checked/Date: LT/PE 9/26/11 Project No.: 4361 Figure: A2.33b

39 LA METRO PBTUNNEL ZONE S:\131 GEOTECH\GINTW\LIBRARY MACTEC JUNE11.GLB G:\PROJECT_DIRECTORIES\43\\61_METRO_WESTSIDE_EXTENSION\ GEOTECHNICAL DESIGN\3.2 ALL FIELD NOTES\GINT LOG\NEW TEMPLATE MARCH 14, 11\4361_(1139).GPJ /18/11 Tunnel Fugro / CME 5/23/11 and 5/24/11 CH More sand, weakly cemented Becomes very stiff, fine to medium sand, trace mica Less fine sand AYEY SAND with GRAVEL medium dense, moist, olive, fine to coarsegrained, fine gravel (up to 1/2 inch in size) (Sample not recovered) Becomes dense SILTY SAND medium dense, moist, olive yellow, fine to coarsegrained, trace gravel (up to 1/2inch in size), no cementation to moderately cemented, trace mica AYEY SAND medium dense, moist, fine to coarsegrained, trace fine gravel SAN PEDRO FORMATION [Qsp] FAT AY stiff to very stiff, moist, olive brown, some fine sand, trace medium, some calcium carbonate nodules, trace magnesium stains, moderately cemented More calcium carbonate nodules More silt, trace fine sand Sta 0+, Lt 33 feet 47/8 inches G feet GROUNDWATER READINGS Drilling mud bailed on 5/23/11. Groundwater level measured at 32½ feet below the ground surface on 5/24/11. SANDY LEAN AY very stiff, moist, olive brown, fine sand, trace calcium carbonate nodules, trace shell fragments and organics SILTY AY very stiff, moist, dark greenishgray, some fine sand, trace shell, no cementation to weakly cemented, trace calcium carbonate nodules Field Tech: LH Prepared/Date: YN 9/9/11 Checked/Date: LT/PE 9/26/11 Project No.: 4361 Figure: A2.33c