GEOTECHNICAL INVESTIGATION. Proposed Douglas Street Bus Lane

Transcription

1 May, 0 GEOTECHNICAL INVESTIGATION Proposed Douglas Street Bus Lane Submitted to: Greg Smith P.Eng. Senior Transportation Engineer Urban Systems Ltd. 0- Homer Street Vancouver, BC V6B W9 REPORT Report Number: 4-00-R-Rev0 Distribution: copies - Urban Systems Ltd. copies - Golder Associates Ltd.

2 UGLAS STREET BUS LANE GEOTECHNICAL INVESTIGATION Table of Contents.0 INTRODUCTION....0 SCOPE OF WORK SITE DESCRIPTION AND BACKGROUND SUB-SURFACE INVESTIGATION Laboratory Testing SUBSURFACE CONDITIONS Asphalt Pavement Soils Groundwater....0 COMMENTS AND RECOMMENDATIONS CLOSURE... 6 TABLES (IN TEXT) Table : Observed Asphalt Pavement Thickness... 3 TABLES (ATTACHED) Table : Douglas Street Bus Lane Geotechnical Profile FIGURES Figure : Key Plan Figure : Borehole Locations APPENDICES APPENDIX A Important Information and Limitations of This Report APPENDIX B Record of Boreholes APPENDIX C Laboratory Test Results May, 0 Report No R-Rev0 i

3 UGLAS STREET BUS LANE GEOTECHNICAL INVESTIGATION.0 INTRODUCTION Golder Associates Ltd. (Golder) is pleased to provide Urban Systems Ltd.(USL) with this report documenting the factual results and recommendations of a geotechnical investigation carried out for a proposed bus lane alongside the existing northbound lane of Douglas Street, from Tolmie Avenue to the Switch Bridge of the Galloping Goose Trail in Victoria BC (the Site). The investigation was carried out according to the scope of work in our proposal dated March 3, 0. This report addresses the geotechnical investigation, a separate report will be provided for the Environmental Site Assessment requirements of the project. If required, additional bio-environmental services such as archaeological services can be provided by Golder. This report shall be read in conjunction with Important Information and Limitations of This Report which is included following the text as Appendix A. The reader s attention is specifically drawn to this information for the proper use and interpretation of this report..0 SCOPE OF WORK From the information provided via , Golder understands that the BC Ministry of Transportation and Infrastructure (MoTI) is proposing to widen Douglas Street between Alpha Street and Harriet Road to develop a northbound bus lane. The section of interest is approximately 00 m in length (See Figure - Location Plan). USL retained Golder to carry out the following tasks: investigate the ground conditions adjacent to the east side of Douglas Street; confirm the thickness of the existing pavement structure of Douglas Street; and prepare a summary report and provide pavement design recommendations for the proposed bus lane. 3.0 SITE DESCRIPTION AND BACKGROUND Douglas Street is a four lane urban street; it is classified as Highway Trans Canada Highway. The section that is the topic of this report has eight intersections and cross streets. Average annual daily traffic is approximately 0,000 vehicles in each direction. Published geological mapping of the site indicates that the ground conditions consist of thick Victoria Clay comprising to m of brown facies clay overlying greater than 3 m of soft grey clay. Between Cloverdale Street and Audley Street and between Saanich Road and Culduthel Road, the ground has been mapped as shallow brown Victoria Clay (less than m thick) overlying bedrock. Monahan,P.A. and Levson,V.M., Quaternary Geological Map of Greater Victoria, Geoscience Map 000-, Geological Survey Branch, Ministry of Energy and Mines, 000- May, 0 Report No R-Rev0

4 UGLAS STREET BUS LANE GEOTECHNICAL INVESTIGATION Visually, the condition of the existing pavement appears to be good with minor cracking and minor distortion. However a detailed pavement condition rating was not performed. The location of the proposed bus lane is primarily over the existing sidewalk, bus pullouts or right turn lanes. 4.0 SUB-SURFACE INVESTIGATION The geotechnical subsurface investigation along Douglas St. was carried out on April 0 and 3, 0. Eight boreholes were advanced through the road surface and subsurface using a hollow stem truck mounted auger drillrig, supplied and operated by Drillwell Ltd. based out of Duncan BC. The approximate borehole locations are shown in Figure : Borehole Location Plan. The borehole investigation was conducted to assess the asphalt and subsurface soil conditions and obtain disturbed soil samples. The boreholes were advanced to between.83 and 3.0 m below ground surface (bgs). The Record of Borehole summary logs are provided in Appendix B. The drilling investigations were conducted under the full-time supervision of a member of Golder s geotechnical staff, who visually examined and logged the subsurface conditions encountered and collected soil samples for review and laboratory testing. The subsurface soil stratigraphy was visually inspected and logged based cuttings from the auger flights and split spoon samples collected during Standard Penetration Testing (SPT). SPT methods were also used to assess in-situ relative density and consistency of the soils. SPT testing was conducted using a 63. kg automatic hammer dropped 760 mm. A 0 mm wide open sampler was driven 600 mm (4 in) and the SPT blow N value was determined based on the blow count between 0 and 40 mm of driving. Disturbed samples collected from the sampler were transported to Golder s geotechnical testing laboratory in Victoria B.C. for laboratory index testing. Upon completion the boreholes were backfilled with soil cuttings and nominally compacted with the available equipment, the asphalt surface was patched using a cold-patch asphalt mix. 4. Laboratory Testing Samples from the boreholes were submitted to Golder s materials testing laboratory in Victoria for index testing. Based on the soil conditions encountered during the investigation the following testing was carried out: 8 - Water contents (ASTM D499); 3 - Atterberg Limits (ASTM D438-0); and 3 - Grain Size Analysis (ASTM D4-63). Water content and Atterberg limits and grain size distributions are provided on the Record of Borehole logs provided in Appendix B. Detailed results of laboratory testing are provided in Appendix C. May, 0 Report No R-Rev0

5 UGLAS STREET BUS LANE GEOTECHNICAL INVESTIGATION 4. SUBSURFACE CONDITIONS The encountered subsurface conditions provide information on the existing pavement structure along the proposed bus lane. The existing pavement structure was observed to vary between boreholes and has been grouped and discussed based on location. For ease of discussion the subsurface conditions encountered under the northbound lane of Douglas Street have been grouped and interpreted as the following materials, in order of increasing depth: Asphalt pavement; overlying base course: sand and gravel; overlying sub grade: sandy silty clay; overlying cobbles and coarse gravel; overlying silty clay or sand and gravel; overlying bedrock. General descriptions of the materials encountered based on locations is provided in the sections below. Detailed descriptions and borehole logs are provided in Appendix B Record of Boreholes. 4.. Asphalt Pavement Asphalt Pavement was encountered at surface at all eight borehole locations. The asphalt pavement ranged in thickness from 0 to 300 mm but was typically 00 mm in thickness. The observed asphalt pavement thickness is provided in the table below: Table : Observed Asphalt Pavement Thickness Borehole General Location Observed Asphalt Thickness BH-0 North of Tolmie Avenue 0 mm BH-0 North of Cloverdale Avenue 00 mm BH-03 North of Audley Street 00 mm BH-04 South of Saanich Road 0 mm BH-0 North of Saanich Road 0 mm BH-06 Opposite Culduthel Road 00 mm BH-07 South of Carey Road 00 mm BH-08 North of Switch Bridge 300 mm May, 0 Report No R-Rev0 3

6 UGLAS STREET BUS LANE GEOTECHNICAL INVESTIGATION 4.. Soils Alpha Street to Audley Street Boreholes BH-0 and BH-0 were located between Alpha Street and Audley Street. In this section the asphalt pavement was underlain by approximately 0. m of sand and gravel fill (base course). Particle size distributions of a sample collected from this material had the following gradation: 6% gravel, 30% sand and % fines. The base course was underlain by inferred native material comprised of to.3 m thickness of firm to stiff silty clay overlying sand and gravel or silty sand trace gravel encountered to the maximum depth of investigation, 3.0 m bgs. A strong hydrocarbon odour was noted at to. m depth at BH-0 and a slight hydrocarbon odour was noted in the silty clay unit in BH-0. Audley Street to Saanich Road Boreholes BH-03 and BH-04 were located between Audley Street and Saanich Road. In this section the asphalt pavement was underlain by 0. to 0.3 m of sand and gravel fill (base course). Particle size distributions of a sample collected from this material had the following gradations: 67.0% gravel, 3.8% sand and 9.% fines. The base course was underlain by firm to stiff sandy silty clay ranging from 0. to 0.6 m in thickness. Underlying the clayey silty sand, cobbles and coarse gravel, having a thickness ranging between 0. to. m was encountered. These materials were underlain by firm silty clay or hard clayey silty sand, inferred to be in situ native material. These soils were encountered to the maximum depth of investigation, 3.0 m bgs. Saanich Road to Harriet Road Boreholes BH-0, BH-06, BH-07 and BH-08 were located between Saanich Road and Harriet Road. In this section the asphalt pavement was underlain by sand and gravel fill (base course) ranging in thickness from 0. to 0.8 m. Particle size distributions of a sample collected from this material had the following gradations: 49% gravel, 46% sand and % fines. In boreholes BH-0, BH-07 and BH-08 the base course was underlain by silty clay, sandy clay and cobbles which was in turn underlain by clay or sand. These soils are inferred to be in situ native material and were encountered to the maximum depth of investigation, 3.0 m bgs. In borehole BH-06 underlying the sand and gravel base course was a lower layer of asphalt pavement. The lower asphalt layer was 0.0 m thick. The asphalt was underlain by sand and gravel having a thickness of approximately 0.6 m. It is inferred that this layer is fill and is underlain by sandy silty clay to a depth of.7 m bgs. At.7 m bgs bedrock was reached and the borehole was terminated (this was inferred by the drill refusal). May, 0 Report No R-Rev0 4

7 UGLAS STREET BUS LANE GEOTECHNICAL INVESTIGATION 4.3 Groundwater Groundwater was not encountered during the subsurface investigation. However, based on Golder s experience in similar ground conditions in the Victoria area, it is inferred that groundwater levels could rise to near the top of the clay, especially after periods of sustained wet weather (i.e., winter months), given the poor drainage properties of these soils..0 COMMENTS AND RECOMMENDATIONS In summary, the existing roadway structure generally consists of asphalt pavement varying in thickness from 0 to 300 mm but generally 00 mm, 00 mm of base course/ sub-base granular aggregate, overlying a subgrade that is typically firm to stiff silty clay. This structure appears to be providing an acceptable roadway structure for the present traffic conditions. The anticipated traffic loading for the proposed bus lane is not known at this time. When details of the bus traffic volumes are available a specific roadway design can be carried out. In the interim, for preliminary design, the MoTI typical pavement design for high volume roads is recommended. This interim structure consists of: 00 mm of asphalt pavement, 300 mm of crushed base course (0 mm of mm maximum particle size over 0 mm of 7 mm maximum particle size) and 300 mm of select granular sub-base. No unusual or problematic ground conditions for construction were encountered. Existing sidewalk materials and surface organic soils must be removed prior to placement of the new roadway structure. MoTI Standard Specifications for Highway Construction must be followed for all aspects of construction. May, 0 Report No R-Rev0

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9 //0 Table : Douglas Street Bus Lane Geotechnical Profile 4 Location Depth m bgs North of Switch Bridge BH-08 Unit Thickness South of Carey Rd. BH-07 Opposite Culduthel Rd. Unit BH-06 Thickness 0. asphalt pavement sand and gravel North of Saanich Rd. Unit BH-0 Thickness 0. asphalt pavement gravelly sand Unit Thickness South of Saanich Rd. BH-04 North of Audley St. Unit BH-03 Thickness 0.0 asphalt pavement sand and gravel Unit Thickness North of Cloverdale Av. BH-0 North of Tolmie Av. Unit BH-0 Thickness 0. asphalt pavement sand and gravel 0. asphalt pavement 0.3 asphalt pavement 0. asphalt pavement 0. asphalt pavement 0. sand and gravel sand and sand and gravel gravel sand and 0.6 firm sandy 0.46 gravel silty clay 0. stiff sandy 0.6 silty clay 0.6 firm silty clay firm silty clay 0.46 firm silty clay asphalt 0.0 cobbles and 0.46 firm silty clay.98 pavement coarse gravel 0.9 gravelly sand coarse gravel 0.6 firm sandy silty 0.6 stiff firm clay.9 and cobbles clay Unit Thickness 0... stiff silty clay. cobbles and. to clay coarse gravel.3 firm sandy.37.4 silty clay. very stiff sandy 0.38 silty clay.6 firm silty clay 0.94 loose silty sand bedrock.0 EOH: very stiff clay firm silty clay 0.6 to clay.6.7 stiff sandy 0.46 stiff silty clay 0.46 hard clayey 0.46 clayey silt to silty sand.8 clayey silty sand loose sand and gravel 3.0 stiff silty sand 0. EOH: 3.0 EOH: 3.0 EOH: 3.0 EOH: 3.0 EOH: 3.0 EOH: 3.0 EOH: 3.0 \\golder.gds\gal\burnaby\final\0\3 Proj\4 USL_Douglas St Bus Lane_Victoria\4-00-R-Rev0-MAY_\ Table Summary of stratigraphy dl.xlsx [Sheet] Golder Associates Page of

10 INSET MAP - NOT TO SCALE Nanaimo VANCOUVER ISLAND Duncan Sidney Port Renfrew Sooke Victoria ENLARGED AREA IF THIS MEASUREMENT ES NOT MATCH WHAT IS SHOWN, THE SHEET SIZE HAS BEEN MODIFIED FROM: ANSI A REFERENCE :0,000,000,000 METRES CLIENT PROJECT URBAN SYSTEMS LTD. UGLAS STREET PROPOSED BUS LANE VICTORIA, BC CONSULTANT YYYY-MM-DD DESIGNED D. LISTER PREPARED A. WOOD REVIEWED D. LISTER APPROVED M. KELLY mm 0 DEPARTMENT OF NATURAL RESOURCES. ALL RIGHTS RESERVED. PROJECTION: TRANSVERSE MERCATOR, DATUM: NAD83, COORDINATE SYSTEM: UTM ZONE 0. TITLE KEY PLAN PROJECT NO. PHASE REV FIGURE 0 Path: \\golder.gds\gal\victoria\cad-gis\client\urban_systems\victoria_douglas_street\99_projects\4_douglas_st_bus_lane\0_production\ File Name: dwg PROJECT LOCATION

11 Path: \\golder.gds\gal\victoria\cad-gis\client\urban_systems\victoria_douglas_street\99_projects\4_douglas_st_bus_lane\0_production\ File Name: dwg LEGEND BOREHOLE LOCATION REFERENCE IMAGE OBTAINED FROM GOOGLE EARTH PRO. USED UNDER LICENSE. IMAGERY DATE: NOVEMBER 9, 04. GOOGLE EARTH IMAGE IS NOT TO SCALE. CLIENT URBAN SYSTEMS LTD. CONSULTANT YYYY-MM-DD DESIGNED PREPARED REVIEWED APPROVED D. LISTER J. FARAH D. LISTER M. KELLY PROJECT UGLAS STREET PROPOSED BUS LANE VICTORIA, BC TITLE BOREHOLE LOCATION PLAN PROJECT NO. 4 0 :3,000 (APPROX.) PHASE METRES REV. 0 FIGURE IF THIS MEASUREMENT ES NOT MATCH WHAT IS SHOWN, THE SHEET SIZE HAS BEEN MODIFIED FROM: ANSI B 0 mm

12 UGLAS STREET BUS LANE GEOTECHNICAL INVESTIGATION APPENDIX A Important Information and Limitations of This Report May, 0 Report No R-Rev0

13 LIMITATIONS AND USE OF THIS REPORT LIMITATIONS AND USE OF THIS REPORT Standard of Care: Golder Associates Ltd. (Golder) has prepared this report in a manner consistent with that level of care and skill ordinarily exercised by members of the engineering and science professions currently practicing under similar conditions in the jurisdiction in which the services are provided, subject to the time limits and physical constraints applicable to this report. No other warranty, expressed or implied is made. Basis and Use of the Report: This report has been prepared for the specific site, design objective, development and purpose described to Golder by the Client. The factual data, interpretations and recommendations pertain to a specific project as described in this report and are not applicable to any other project or site location. Any change of site conditions, purpose, development plans or if the project is not initiated within eighteen months of the date of the report may alter the validity of the report. Golder can not be responsible for use of this report, or portions thereof, unless Golder is requested to review and, if necessary, revise the report. The information, recommendations and opinions expressed in this report are for the sole benefit of the Client. No other party may use or rely on this report or any portion thereof without Golder s express written consent. If the report was prepared to be included for a specific permit application process, then upon the reasonable request of the client, Golder may authorize in writing the use of this report by the regulatory agency as an Approved User for the specific and identified purpose of the applicable permit review process. Any other use of this report by others is prohibited and is without responsibility to Golder. The report, all plans, data, drawings and other documents as well as all electronic media prepared by Golder are considered its professional work product and shall remain the copyright property of Golder, who authorizes only the Client and Approved Users to make copies of the report, but only in such quantities as are reasonably necessary for the use of the report by those parties. The Client and Approved Users may not give, lend, sell, or otherwise make available the report or any portion thereof to any other party without the express written permission of Golder. The Client acknowledges that electronic media is susceptible to unauthorized modification, deterioration and incompatibility and therefore the Client can not rely upon the electronic media versions of Golder s report or other work products. The report is of a summary nature and is not intended to stand alone without reference to the instructions given to Golder by the Client, communications between Golder and the Client, and to any other reports prepared by Golder for the Client relative to the specific site described in the report. In order to properly understand the suggestions, recommendations and opinions expressed in this report, reference must be made to the whole of the report. Golder can not be responsible for use of portions of the report without reference to the entire report. Unless otherwise stated, the suggestions, recommendations and opinions given in this report are intended only for the guidance of the Client in the design of the specific project. The extent and detail of investigations, including the number of test holes, necessary to determine all of the relevant conditions which may affect construction costs would normally be greater than has been carried out for design purposes. Contractors bidding on, or undertaking the work, should rely on their own investigations, as well as their own interpretations of the factual data presented in the report, as to how subsurface conditions may affect their work, including but not limited to proposed construction techniques, schedule, safety and equipment capabilities. /3

14 LIMITATIONS AND USE OF THIS REPORT LIMITATIONS AND USE OF THIS REPORT (CON T) Soil, Rock and Groundwater Conditions: Classification and identification of soils, rocks, and geologic units have been based on commonly accepted methods employed in the practice of geotechnical engineering and related disciplines. Classification and identification of the type and condition of these materials or units involves judgment, and boundaries between different soil, rock or geologic types or units may be transitional rather than abrupt. Accordingly, Golder does not warrant or guarantee the exactness of the descriptions. Special risks occur whenever engineering or related disciplines are applied to identify subsurface conditions and even a comprehensive investigation, sampling and testing program may fail to detect all or certain subsurface conditions. The environmental, geologic, geotechnical, geochemical and hydrogeologic conditions that Golder interprets to exist between and beyond sampling points may differ from those that actually exist. In addition to soil variability, fill of variable physical and chemical composition can be present over portions of the site or on adjacent properties. The professional services retained for this project include only the geotechnical aspects of the subsurface conditions at the site, unless otherwise specifically stated and identified in the report. The presence or implication(s) of possible surface and/or subsurface contamination resulting from previous activities or uses of the site and/or resulting from the introduction onto the site of materials from off-site sources are outside the terms of reference for this project and have not been investigated or addressed. Soil and groundwater conditions shown in the factual data and described in the report are the observed conditions at the time of their determination or measurement. Unless otherwise noted, those conditions form the basis of the recommendations in the report. Groundwater conditions may vary between and beyond reported locations and can be affected by annual, seasonal and meteorological conditions. The condition of the soil, rock and groundwater may be significantly altered by construction activities (traffic, excavation, groundwater level lowering, pile driving, blasting, etc.) on the site or on adjacent sites. Excavation may expose the soils to changes due to wetting, drying or frost. Unless otherwise indicated the soil must be protected from these changes during construction. Sample Disposal: Golder will dispose of all uncontaminated soil and/or rock samples 90 days following issue of this report or, upon written request of the Client, will store uncontaminated samples and materials at the Client s expense. In the event that actual contaminated soils, fills or groundwater are encountered or are inferred to be present, all contaminated samples shall remain the property and responsibility of the Client for proper disposal. Follow-Up and Construction Services: All details of the design were not known at the time of submission of Golder s report. Golder should be retained to review the final design, project plans and documents prior to construction, to confirm that they are consistent with the intent of Golder s report. During construction, Golder should be retained to perform sufficient and timely observations of encountered conditions to confirm and document that the subsurface conditions do not materially differ from those interpreted conditions considered in the preparation of Golder s report and to confirm and document that construction activities do not adversely affect the suggestions, recommendations and opinions contained in Golder s report. Adequate field review, observation and testing during construction are necessary for Golder to be able to provide letters of assurance, in accordance with the requirements of many regulatory authorities. In cases where this recommendation is not followed, Golder s responsibility is limited to interpreting accurately the information encountered at the borehole locations, at the time of their initial determination or measurement during the preparation of the Report. /3

15 LIMITATIONS AND USE OF THIS REPORT LIMITATIONS AND USE OF THIS REPORT (CON T) Changed Conditions and Drainage: Where conditions encountered at the site differ significantly from those anticipated in this report, either due to natural variability of subsurface conditions or construction activities, it is a condition of this report that Golder be notified of any changes and be provided with an opportunity to review or revise the recommendations within this report. Recognition of changed soil and rock conditions requires experience and it is recommended that Golder be employed to visit the site with sufficient frequency to detect if conditions have changed significantly. Drainage of subsurface water is commonly required either for temporary or permanent installations for the project. Improper design or construction of drainage or dewatering can have serious consequences. Golder takes no responsibility for the effects of drainage unless specifically involved in the detailed design and construction monitoring of the system. 3/3

16 UGLAS STREET BUS LANE GEOTECHNICAL INVESTIGATION APPENDIX B Record of Boreholes May, 0 Report No R-Rev0

17 PROJECT No.: 4 / 000 CLIENT: Urban Systems Ltd. PROJECT: Douglas Street - Geotechnical investigation LOCATION: Victoria, BC N: ~36609 E: ~4749 NAD83 UTM Zone: 0 Note: Northing and Easting Coordinates have been determined by GPS in the field and are approximate only. DEPTH SCALE METRES 0 DRILLING RIG DRILLING METHOD Ground Surface ASPHALT, pavement. SOIL PROFILE DESCRIPTION FILL - (SP/GP) SAND and GRAVEL, trace to some fines; grey-brown; non-cohesive, moist, compact. STRATA PLOT ELEV. DEPTH 0.00 RECORD OF BOREHOLE: BH-0 NUMBER 0. GS DRILLING DATE: April 0, 0 INCLINATION: -90 SAMPLES DYNAMIC PENETRATION RESISTANCE, BLOWS/0.3m TYPE RECOVERY % BLOWS/0.3m SHEAR STRENGTH nat V. Q - Cu, kpa rem V. U - Pocket Pen HYDRAULIC CONDUCTIVITY, k, cm/s (CI) SILTY CLAY, some sand; brown; cohesive, w>pl, firm (CL) SILTY CLAY, trace sand; grey-brown; cohesive, w>pl, firm Truck Mounted Auger Drill WATER CONTENT PERCENT Wp W Wl NP - Non-Plastic SHEET OF DATUM: Ground Surface ADDITIONAL LAB. TESTING PIEZOMETER, STANDPIPE OR THERMISTOR INSTALLATION 73 4 Hollow Stem Auger - black soil with strong hydrocarbon odour from.0 to. m depth (SP/GP) SAND and GRAVEL, some fines; grey, strong hydrocarbon odour; non-cohesive, wet, loose End of Borehole. 3.0 National IM Server:GINT_GAL_NATIONALIM Unique Project ID: Output Form:BC_BOREHOLE (AUTO) jfarah // 4 DEPTH SCALE : SOIL CLASSIFICATION SYSTEM: GACS LOGGED: J. Plican CHECKED: D. Lister

18 PROJECT No.: 4 / 000 CLIENT: Urban Systems Ltd. PROJECT: Douglas Street - Geotechnical investigation LOCATION: Victoria, BC N: ~36637 E: ~47376 NAD83 UTM Zone: 0 Note: Northing and Easting Coordinates have been determined by GPS in the field and are approximate only. DEPTH SCALE METRES 0 DRILLING RIG DRILLING METHOD Ground Surface ASPHALT, pavement. SOIL PROFILE DESCRIPTION FILL - (GP) Sandy GRAVEL, some fines; grey-brown; non-cohesive, moist, compact. STRATA PLOT ELEV. DEPTH RECORD OF BOREHOLE: BH-0 NUMBER GS DRILLING DATE: April 0, 0 INCLINATION: -90 SAMPLES DYNAMIC PENETRATION RESISTANCE, BLOWS/0.3m TYPE RECOVERY % BLOWS/0.3m (CI-CH) SILTY CLAY to CLAY, trace sand; brown; cohesive, w>pl, firm (CH) CLAY; brown, slight hydrocarbon odour; cohesive, w>pl, firm Truck Mounted Auger Drill SHEAR STRENGTH nat V. Q - Cu, kpa rem V. U - Pocket Pen HYDRAULIC CONDUCTIVITY, k, cm/s WATER CONTENT PERCENT Wp W Wl NP - Non-Plastic SHEET OF DATUM: Ground Surface ADDITIONAL LAB. TESTING PIEZOMETER, STANDPIPE OR THERMISTOR INSTALLATION 9 Hollow Stem Auger (SC/SM) SILTY SAND, trace gravel; brown-grey; cohesive, w>pl, stiff. End of Borehole National IM Server:GINT_GAL_NATIONALIM Unique Project ID: Output Form:BC_BOREHOLE (AUTO) jfarah // 4 DEPTH SCALE : SOIL CLASSIFICATION SYSTEM: GACS LOGGED: J. Plican CHECKED: D. Lister

19 PROJECT No.: 4 / 000 CLIENT: Urban Systems Ltd. PROJECT: Douglas Street - Geotechnical investigation LOCATION: Victoria, BC N: ~3667 E: ~4730 NAD83 UTM Zone: 0 Note: Northing and Easting Coordinates have been determined by GPS in the field and are approximate only. DEPTH SCALE METRES 0 DRILLING RIG DRILLING METHOD Ground Surface ASPHALT, pavement. SOIL PROFILE DESCRIPTION FILL - (SP/GP) SAND and GRAVEL, some fines; brown-grey; non-cohesive, moist, compact. STRATA PLOT ELEV. DEPTH RECORD OF BOREHOLE: BH-03 NUMBER GS DRILLING DATE: April 0, 0 INCLINATION: -90 SAMPLES DYNAMIC PENETRATION RESISTANCE, BLOWS/0.3m TYPE RECOVERY % BLOWS/0.3m SHEAR STRENGTH nat V. Q - Cu, kpa rem V. U - Pocket Pen HYDRAULIC CONDUCTIVITY, k, cm/s (CL) Sandy SILTY CLAY, trace to some gravel; brown-grey; cohesive, w>pl, stiff Inferred layer of COBBLES and GRAVEL, coarse Truck Mounted Auger Drill WATER CONTENT PERCENT Wp W Wl NP - Non-Plastic SHEET OF DATUM: Ground Surface ADDITIONAL LAB. TESTING PIEZOMETER, STANDPIPE OR THERMISTOR INSTALLATION 0 33 Hollow Stem Auger (SM) CLAYEY SILTY SAND, some gravel; grey, TILL-LIKE; cohesive, w>pl, hard End of Borehole. 3.0 National IM Server:GINT_GAL_NATIONALIM Unique Project ID: Output Form:BC_BOREHOLE (AUTO) jfarah // 4 DEPTH SCALE : SOIL CLASSIFICATION SYSTEM: GACS LOGGED: J. Plican CHECKED: D. Lister

20 PROJECT No.: 4 / 000 CLIENT: Urban Systems Ltd. PROJECT: Douglas Street - Geotechnical investigation LOCATION: Victoria, BC N: ~36664 E: ~4766 NAD83 UTM Zone: 0 Note: Northing and Easting Coordinates have been determined by GPS in the field and are approximate only. DEPTH SCALE METRES 0 DRILLING RIG DRILLING METHOD SOIL PROFILE DESCRIPTION Ground Surface ASPHALT, pavement. FILL - (SP/GP) SAND and GRAVEL, trace to some fines; brown; non-cohesive, moist, compact. (CI-CL) sandy SILTY CLAY; grey-brown; cohesive, w~pl, firm. STRATA PLOT ELEV. DEPTH GS 0.30 RECORD OF BOREHOLE: BH-04 NUMBER 0 4 DRILLING DATE: April 3, 0 INCLINATION: -90 SAMPLES DYNAMIC PENETRATION RESISTANCE, BLOWS/0.3m TYPE RECOVERY % BLOWS/0.3m SHEAR STRENGTH nat V. Q - Cu, kpa rem V. U - Pocket Pen HYDRAULIC CONDUCTIVITY, k, cm/s WATER CONTENT PERCENT Wp W Wl NP - Non-Plastic SHEET OF DATUM: Ground Surface ADDITIONAL LAB. TESTING PIEZOMETER, STANDPIPE OR THERMISTOR INSTALLATION Inferred COBBLES and coarse GRAVEL 0.76 Truck Mounted Auger Drill Hollow Stem Auger (CI-CL) SILTY CLAY, trace fine sand; grey; cohesive, w>pl, firm (CL) SILTY CLAY, trace sand; grey-brown; cohesive, w>pl, stiff to very stiff End of Borehole. 3.0 National IM Server:GINT_GAL_NATIONALIM Unique Project ID: Output Form:BC_BOREHOLE (AUTO) jfarah // 4 DEPTH SCALE : SOIL CLASSIFICATION SYSTEM: GACS LOGGED: J. Plican CHECKED: D. Lister

21 PROJECT No.: 4 / 000 CLIENT: Urban Systems Ltd. PROJECT: Douglas Street - Geotechnical investigation LOCATION: Victoria, BC N: ~3667 E: ~4730 NAD83 UTM Zone: 0 Note: Northing and Easting Coordinates have been determined by GPS in the field and are approximate only. DEPTH SCALE METRES 0 DRILLING RIG DRILLING METHOD Ground Surface ASPHALT, pavement. SOIL PROFILE DESCRIPTION STRATA PLOT ELEV. DEPTH 0.00 RECORD OF BOREHOLE: BH-0 NUMBER DRILLING DATE: April 3, 0 INCLINATION: -90 SAMPLES DYNAMIC PENETRATION RESISTANCE, BLOWS/0.3m TYPE RECOVERY % BLOWS/0.3m FILL - (SP) gravelly SAND, some fines; brown; non-cohesive, moist, compact. 0. GS (CL-CI) SILTY CLAY, trace sand; brown; cohesive, w>pl, firm to stiff. 0.6 (CI-CH) SILTY CLAY to CLAY, trace sand; brown; cohesive, w>pl, stiff to very stiff Truck Mounted Auger Drill SHEAR STRENGTH nat V. Q - Cu, kpa rem V. U - Pocket Pen HYDRAULIC CONDUCTIVITY, k, cm/s WATER CONTENT PERCENT Wp W Wl NP - Non-Plastic SHEET OF DATUM: Ground Surface ADDITIONAL LAB. TESTING PIEZOMETER, STANDPIPE OR THERMISTOR INSTALLATION 83 Hollow Stem Auger (CH) CLAY, trace fine sand; brown; cohesive; w>pl, very stiff End of Borehole. 3.0 National IM Server:GINT_GAL_NATIONALIM Unique Project ID: Output Form:BC_BOREHOLE (AUTO) jfarah // 4 DEPTH SCALE : SOIL CLASSIFICATION SYSTEM: GACS LOGGED: J. Plican CHECKED: D. Lister

22 PROJECT No.: 4 / 000 CLIENT: Urban Systems Ltd. PROJECT: Douglas Street - Geotechnical investigation LOCATION: Victoria, BC N: ~36683 E: ~4796 NAD83 UTM Zone: 0 Note: Northing and Easting Coordinates have been determined by GPS in the field and are approximate only. DEPTH SCALE METRES 0 DRILLING RIG DRILLING METHOD Ground Surface ASPHALT, pavement. SOIL PROFILE DESCRIPTION FILL - (SP/GP) SAND and GRAVEL, trace fines; brown; non-cohesive, moist, dense. STRATA PLOT ELEV. DEPTH 0.00 RECORD OF BOREHOLE: BH-06 NUMBER 0.0 GS DRILLING DATE: April 3, 0 INCLINATION: -90 SAMPLES DYNAMIC PENETRATION RESISTANCE, BLOWS/0.3m TYPE RECOVERY % BLOWS/0.3m SHEAR STRENGTH nat V. Q - Cu, kpa rem V. U - Pocket Pen HYDRAULIC CONDUCTIVITY, k, cm/s WATER CONTENT PERCENT Wp W Wl NP - Non-Plastic SHEET OF DATUM: Ground Surface ADDITIONAL LAB. TESTING PIEZOMETER, STANDPIPE OR THERMISTOR INSTALLATION 3 7 Truck Mounted Auger Drill Hollow Stem Auger ASPHALT, pavement. (SP) gravelly SAND, some fines; brown; non-cohesive, moist, compact (CL) sandy SILTY CLAY, trace gravel; brown-grey, TILL; cohesive, w~pl, very stiff..37 Inferred BEDROCK. End of Borehole > National IM Server:GINT_GAL_NATIONALIM Unique Project ID: Output Form:BC_BOREHOLE (AUTO) jfarah // 4 DEPTH SCALE : SOIL CLASSIFICATION SYSTEM: GACS LOGGED: J. Plican CHECKED: D. Lister

23 PROJECT No.: 4 / 000 CLIENT: Urban Systems Ltd. PROJECT: Douglas Street - Geotechnical investigation LOCATION: Victoria, BC N: ~ E: ~474 NAD83 UTM Zone: 0 Note: Northing and Easting Coordinates have been determined by GPS in the field and are approximate only. DEPTH SCALE METRES 0 DRILLING RIG DRILLING METHOD Ground Surface ASPHALT, pavement. SOIL PROFILE DESCRIPTION FILL - (GP) SAND and GRAVEL, trace to some fines; grey-brown; non-cohesive, moist, compact to dense. STRATA PLOT ELEV. DEPTH 0.00 RECORD OF BOREHOLE: BH-07 NUMBER 0.0 GS DRILLING DATE: April 3, 0 INCLINATION: -90 SAMPLES DYNAMIC PENETRATION RESISTANCE, BLOWS/0.3m TYPE RECOVERY % BLOWS/0.3m SHEAR STRENGTH nat V. Q - Cu, kpa rem V. U - Pocket Pen HYDRAULIC CONDUCTIVITY, k, cm/s WATER CONTENT PERCENT Wp W Wl NP - Non-Plastic SHEET OF DATUM: Ground Surface ADDITIONAL LAB. TESTING PIEZOMETER, STANDPIPE OR THERMISTOR INSTALLATION (CL) sandy SILTY CLAY; grey-brown, with pockets of organics; cohesive, w>pl, firm Truck Mounted Auger Drill Hollow Stem Auger (SM) SILTY SAND; with pockets of organics; non-cohesive, moist, loose (ML-SM) sandy CLAYEY SILT to CLAYEY SILTY SAND; grey; cohesive, w>pl, stiff End of Borehole. 3.0 National IM Server:GINT_GAL_NATIONALIM Unique Project ID: Output Form:BC_BOREHOLE (AUTO) jfarah // 4 DEPTH SCALE : SOIL CLASSIFICATION SYSTEM: GACS LOGGED: J. Plican CHECKED: D. Lister

24 PROJECT No.: 4 / 000 CLIENT: Urban Systems Ltd. PROJECT: Douglas Street - Geotechnical investigation LOCATION: Victoria, BC N: ~36698 E: ~47040 NAD83 UTM Zone: 0 Note: Northing and Easting Coordinates have been determined by GPS in the field and are approximate only. DEPTH SCALE METRES 0 DRILLING RIG DRILLING METHOD Ground Surface ASPHALT, pavement. SOIL PROFILE DESCRIPTION STRATA PLOT ELEV. DEPTH 0.00 RECORD OF BOREHOLE: BH-08 NUMBER DRILLING DATE: April 3, 0 INCLINATION: -90 SAMPLES DYNAMIC PENETRATION RESISTANCE, BLOWS/0.3m TYPE RECOVERY % BLOWS/0.3m SHEAR STRENGTH nat V. Q - Cu, kpa rem V. U - Pocket Pen HYDRAULIC CONDUCTIVITY, k, cm/s WATER CONTENT PERCENT Wp W Wl NP - Non-Plastic SHEET OF DATUM: Ground Surface ADDITIONAL LAB. TESTING PIEZOMETER, STANDPIPE OR THERMISTOR INSTALLATION FILL - (SP/GP) SAND and GRAVEL, some fines; grey; non-cohesive, moist, dense GS 3 63 Inferred coarse GRAVEL and COBBLES Truck Mounted Auger Drill Hollow Stem Auger (CI) SILTY CLAY, trace sand; brown; w>pl, firm (CI-CH) SILTY CLAY to CLAY, trace fine sand; grey; w>pl, firm End of Borehole. 3.0 National IM Server:GINT_GAL_NATIONALIM Unique Project ID: Output Form:BC_BOREHOLE (AUTO) jfarah // 4 DEPTH SCALE : SOIL CLASSIFICATION SYSTEM: GACS LOGGED: J. Plican CHECKED: D. Lister

25 UGLAS STREET BUS LANE GEOTECHNICAL INVESTIGATION APPENDIX C Laboratory Test Results May, 0 Report No R-Rev0

26 Client: Urban Systems Ltd. Project: Douglas Street - Geotechnical investigation Location: Victoria, BC Project No.: 4 Phase: 000 Percent Finer by Mass Size of Opening (inches) / 3/4 3/ SUMMARY OF PARTICLE SIZE DISTRIBUTION U.S. Sieve Size (meshes / inch) Hydrometer USCS Particle Size Scale Legend Depth Interval : 0. to 0.30 Sieve Size (USS) (mm) " 3/4" /" 3/8" #4 US MESH #0 US MESH #0 US MESH #40 US MESH #60 US MESH #00 US MESH #00 US MESH Reference(s) ASTM C36 Sample Location: BH-0 Sample No.: Lab Schedule No.: Particle Size (mm) Percent Passing Particle Size (mm) BOULDER COBBLE Coarse GRAVEL Fine Coarse Medium SAND Fine FINES (Silt, Clay) National IM Server:GINT_GAL_NATIONALIM Unique Project ID:799 Output Form:_LAB_PARTICLE SIZE (W/ GRADATIONS) dmackie 4// JP/AA 4//0 DGM 4//0 Tech Date Checked Date Golder Associates Ltd. 379 Carey Road Victoria, British Columbia, Canada V8Z 6T8 Tel: (0) Fax: (0) Golder Associates: Operations in Africa, Asia, Australasia, Europe, North America and South America

27 Client: Urban Systems Ltd. Project: Douglas Street - Geotechnical investigation Location: Victoria, BC Project No.: 4 Phase: 000 Percent Finer by Mass Size of Opening (inches) / 3/4 3/ SUMMARY OF PARTICLE SIZE DISTRIBUTION U.S. Sieve Size (meshes / inch) Hydrometer USCS Particle Size Scale Legend Depth Interval : 0.9 to. Sieve Size (USS) (mm) /" " 3/4" /" 3/8" #4 US MESH #0 US MESH #0 US MESH #40 US MESH #60 US MESH #00 US MESH #00 US MESH Reference(s) ASTM C36 Sample Location: BH-03 Sample No.: 3 Lab Schedule No.: Particle Size (mm) Percent Passing Particle Size (mm) BOULDER COBBLE Coarse GRAVEL Fine Coarse Medium SAND Fine FINES (Silt, Clay) National IM Server:GINT_GAL_NATIONALIM Unique Project ID:799 Output Form:_LAB_PARTICLE SIZE (W/ GRADATIONS) dmackie 4// JP/AA 4//0 DGM 4//0 Tech Date Checked Date Golder Associates Ltd. 379 Carey Road Victoria, British Columbia, Canada V8Z 6T8 Tel: (0) Fax: (0) Golder Associates: Operations in Africa, Asia, Australasia, Europe, North America and South America

28 Client: Urban Systems Ltd. Project: Douglas Street - Geotechnical investigation Location: Victoria, BC Project No.: 4 Phase: 000 Percent Finer by Mass Size of Opening (inches) / 3/4 3/ SUMMARY OF PARTICLE SIZE DISTRIBUTION U.S. Sieve Size (meshes / inch) Hydrometer USCS Particle Size Scale Legend Depth Interval : 0.0 to 0. Sieve Size (USS) (mm) /" " 3/4" /" 3/8" #4 US MESH #0 US MESH #0 US MESH #40 US MESH #60 US MESH #00 US MESH #00 US MESH Reference(s) ASTM C36 Sample Location: BH-07 Sample No.: Lab Schedule No.: Particle Size (mm) Percent Passing Particle Size (mm) BOULDER COBBLE Coarse GRAVEL Fine Coarse Medium SAND Fine FINES (Silt, Clay) National IM Server:GINT_GAL_NATIONALIM Unique Project ID:799 Output Form:_LAB_PARTICLE SIZE (W/ GRADATIONS) dmackie 4// JP/AA 4//0 DGM 4//0 Tech Date Checked Date Golder Associates Ltd. 379 Carey Road Victoria, British Columbia, Canada V8Z 6T8 Tel: (0) Fax: (0) Golder Associates: Operations in Africa, Asia, Australasia, Europe, North America and South America

29 LIQUID LIMIT, PLASTIC LIMIT AND PLASTICITY INDEX OF SOILS Client: Urban Systems Ltd. Project: Douglas Street - Geotechnical investigation Location: Victoria, BC Project No.: 4 Phase: 000 Other Remarks: N/A Reference(s) Borehole ID: BH-0 Sample No.: 3 ASTM D Depth Interval : 0.6 to 0.76 Lab Schedule No.: Test Method: A-Multi Point Preparation Method: Wet 80 PLASTICITY CHART CLAY (CH) Plasticity Index SILTY CLAY (CL) SILTY CLAY (CI) CLAYEY SILT (MH) ORGANIC SILT (OH) National IM Server:GINT_GAL_NATIONALIM Unique Project ID: Output Form:_LAB_ATTERBERG CASAGRANDE (SINGLE) dmackie 4// Sym. 0 Sample Location Sample / Specimen Number NP - NON-PLASTIC RESULT ND - NOT DETERMINED A-Line 0 SILTY CLAY-CLAYEY SILT (CL-ML) CLAYEY SILT (ML) ORGANIC SILT (OL) 0 SILT (ML) Liquid Limit Depth Bottom Percent Passing #40 Sieve (%) Liquid Limit Plastic Limit Plasticity Index Natural Water Content (%) Liquidity Index BH ND JP/AA 4//0 DGM 4//0 Tech Date Checked Date Golder Associates Ltd. 379 Carey Road Victoria, British Columbia, Canada V8Z 6T8 Tel: (0) Fax: (0) Golder Associates: Operations in Africa, Asia, Australasia, Europe, North America and South America

30 LIQUID LIMIT, PLASTIC LIMIT AND PLASTICITY INDEX OF SOILS Client: Urban Systems Ltd. Project: Douglas Street - Geotechnical investigation Location: Victoria, BC Project No.: 4 Phase: 000 Other Remarks: N/A Reference(s) Borehole ID: BH-03 Sample No.: ASTM D Depth Interval : 0.76 to 0.9 Lab Schedule No.: Test Method: A-Multi Point Preparation Method: Wet 80 PLASTICITY CHART CLAY (CH) Plasticity Index SILTY CLAY (CL) SILTY CLAY (CI) CLAYEY SILT (MH) ORGANIC SILT (OH) National IM Server:GINT_GAL_NATIONALIM Unique Project ID: Output Form:_LAB_ATTERBERG CASAGRANDE (SINGLE) dmackie 4// Sym. 0 Sample Location Sample / Specimen Number NP - NON-PLASTIC RESULT ND - NOT DETERMINED A-Line 0 SILTY CLAY-CLAYEY SILT (CL-ML) CLAYEY SILT (ML) ORGANIC SILT (OL) 0 SILT (ML) Liquid Limit Depth Bottom Percent Passing #40 Sieve (%) Liquid Limit Plastic Limit Plasticity Index Natural Water Content (%) Liquidity Index BH ND JP/AA 4//0 DGM 4//0 Tech Date Checked Date Golder Associates Ltd. 379 Carey Road Victoria, British Columbia, Canada V8Z 6T8 Tel: (0) Fax: (0) Golder Associates: Operations in Africa, Asia, Australasia, Europe, North America and South America

31 LIQUID LIMIT, PLASTIC LIMIT AND PLASTICITY INDEX OF SOILS Client: Urban Systems Ltd. Project: Douglas Street - Geotechnical investigation Location: Victoria, BC Project No.: 4 Phase: 000 Other Remarks: N/A Reference(s) Borehole ID: BH-07 Sample No.: 3 ASTM D Depth Interval : 0.9 to. Lab Schedule No.: Test Method: A-Multi Point Preparation Method: Wet 80 PLASTICITY CHART CLAY (CH) Plasticity Index SILTY CLAY (CL) SILTY CLAY (CI) CLAYEY SILT (MH) ORGANIC SILT (OH) National IM Server:GINT_GAL_NATIONALIM Unique Project ID: Output Form:_LAB_ATTERBERG CASAGRANDE (SINGLE) dmackie 4// Sym. 0 Sample Location Sample / Specimen Number NP - NON-PLASTIC RESULT ND - NOT DETERMINED A-Line 0 SILTY CLAY-CLAYEY SILT (CL-ML) CLAYEY SILT (ML) ORGANIC SILT (OL) 0 SILT (ML) Liquid Limit Depth Bottom Percent Passing #40 Sieve (%) Liquid Limit Plastic Limit Plasticity Index Natural Water Content (%) Liquidity Index BH ND JP/AA 4//0 DGM 4//0 Tech Date Checked Date Golder Associates Ltd. 379 Carey Road Victoria, British Columbia, Canada V8Z 6T8 Tel: (0) Fax: (0) Golder Associates: Operations in Africa, Asia, Australasia, Europe, North America and South America

32 Sheet of Reference(s) WATER CONTENT DETERMINATION ASTM D 6 Client: Project: Location: Urban Systems Ltd. Douglas Street - Geotechnical investigation Victoria, BC Project No.: 4 Phase: 000 Lab Schedule No.: Sample Location Sample No. Specimen No. Depth Interval Depth Bottom Water Content (%) BH BH BH BH BH BH BH BH National IM Server:GINT_GAL_NATIONALIM Unique Project ID: Output Form:_LAB_WATER CONTENT (REPORT) dmackie 4// Checked Date Golder Associates Ltd. 379 Carey Road Victoria, British Columbia, Canada V8Z 6T8 Tel: (0) Fax: (0) Golder Associates: Operations in Africa, Asia, Australasia, Europe, North America and South America

33 Golder Associates Ltd. nd floor, 379 Carey Road Victoria, British Columbia, V8Z 6T8 Canada T: + (0)