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HomeMy WebLinkAbout11.1 Soils Report - Addendum 1 V1MATERIALS TESTING 6 INSPeCTION 15 November 2018 Page # 1 of 14 b180977g_addl ❑ Environmental Services ❑ Geotechnical Engineering ❑ Construction Materials Testing ❑ Special Inspections Mr. Jeff Harris Coleman Homes, A Toll Brothers Company 3103 West Sheryl Drive, Suite 100 Meridian, ID 83642 208-424-0020 Re: Addendum #1 — Additional Test Pits Oaks North Subdivision Northeast Corner of McDermott Road and McMillan Road Meridian, ID Dear Mr. Harris: As requested, MTI advanced twelve additional test pits on the project site and installed piezometers. This addendum report presents test pit logs from the additional exploration not requested at the time of the previously issued MTI Geotechnical Engineering Report (B 180977g). Descriptions of general site characteristics and the proposed project are available in the previous report. Unless otherwise noted in this addendum, all initial recommendations, limitations, and warranties expressed in the previous report must be adhered to. MTI appreciates this opportunity to be of service to you and looks forward to working with you in the future. If you have questions, please call (208) 376-4748. Respectfully Submitted, Materials Testing & Inspection Nick Stevens, G.I.T. Staff Geologist Enclosures: Geotechnical General Notes Geotechnical Investigation Test Pit Logs Site Map .�O ENS FO y\ O t� 14919 Reviewed by.- Monica acu s, P.E. Senior Geotechnical En i TEOF0P��Q,y MCA SA�V 2791 S Victory View Way • Boise, ID 83709 • (208) 376-4748 • Fax (208) 322-6515 www.mti-id.com • mti(a,)mti-id.com MATERIALS TESTING 6 INSPECTION 15 November 2018 Page # 2 of 14 b180977g_addl ❑ Environmental Services ❑ Geotechnical Engineering ❑ Construction Materials Testing ❑ Special Inspections GEOTECHNICAL GENERAL NOTES RELATIVE DENSITY AND CONSISTENCY CLASSIFICATION Coarse -Grained Soils SPT Blow Counts (N) Fine -Grained Soils SPT Blow Counts (N) Very Loose: < 4 Very Soft: < 2 Loose: 4-10 Soft: 2-4 Medium Dense: 10-30 Medium Stiff: 4-8 Dense: 30-50 Stiff: 8-15 Very Dense: >50 Very Stiff: 15-30 Hard: >30 Moisture Content Aw- Description Field Test Dry Absence of moisture, dusty, dry to touch Moist Damp but not visible moisture Wet Visible free water, usually soil is below water table Cementation Description Field Test Weakly Crumbles or breaks with handling or slight finger pressure Moderately Crumbles or beaks with considerable finger pressure Strongly Will not crumble or break with finger pressure or PARTICLE SIZE Boulders: >12 in. Coarse -Grained Sand: 5 to 0.6 mm Silts: 0.075 to 0.005 mm Cobbles: 12 to 3 in. Medium -Grained Sand: 0.6 to 0.2 mm Clays: <0.005 mm Gravel: 3 in. to 5 mm Fine -Grained Sand: 0.2 to 0.075 mm UNIFIED SOIL CLASSIFICATION SYSTEM Major Divisions Symbol Soil Descriptions Coarse -Grained Soils <50% passes No.200 sieve Gravel & Gravelly Soils <50% coarse fraction passes No.4 sieve GW Well -graded gravels; gravel/sand mixtures with little or no fines GP Poorly -graded gravels; gravel/sand mixtures with little or no fines GM Silty gravels; poorly -graded gravel/sand/silt mixtures GC Clayey gravels; poorly -graded gravel/sand/clay mixtures Sand & Sandy Soils >50% coarse fraction passes No.4 sieve SW Well -graded sands; gravelly sands with little or no fines SP Poorly -graded sands; gravelly sands with little or no fines SM Silty sands; poorly -graded sand/gravel/silt mixtures Sc Clayey sands; poorly -graded sand/gravel/clay mixtures Fine Grained Soils >50% passes No.200 sieve Silts & Clays LL < 50 ML Inorganic silts; sandy, gravelly or clayey silts CL Lean clays; inorganic, gravelly, sandy, or silty, low to medium -plasticity clays OL Organic, low -plasticity clays and silts Silts & Clays LL > 50 MH Inorganic, elastic silts; sandy, gravelly or clayey elastic silts CH Fat clays; high -plasticity, inorganic clays OH Organic, medium to high -plasticity clays and silts Highly Organic Soils PT Peat, humus, hydric soils with high organic content 2791 S Victory View Way • Boise, ID 83709 • (208) 376-4748 • Fax (208) 322-6515 Copyright www.mti-id.com • mti(cbmti-id.com ght©Testing 8 g& Inspection MATERIALS TESTING 6 INSPECTION 15 November 2018 Page # 3 of 14 b180977g_addl ❑ Environmental Services ❑ Geotechnical Engineering ❑ Construction Materials Testing ❑ Special Inspections GEOTECHNICAL INVESTIGATION TEST PIT LOG Test Pit Log #: TP-25 Date Advanced: 29 Oct 2018 Logged by: Nick Stevens, G.I.T. Excavated by: Creighton Contracting, LLC Location: See Site Map Plates Latitude: 43.65732 Longitude:-116.46345 Depth to Water Table: 9.4 Feet bgs Total Depth: 10.6 Feet bgs Notes: Piezometer installed to 10.6 feet bgs. Depth Field Description and USCS Soil and Sample Sample Depth Qp Lab (Feet bgs) Sediment Classification Type (Feet bgs) Test ID Lean Clay (CL): Brown, dry to slightly moist, 0.0-5.2 soft to stiff. 0.25-1.0 --Plow zone noted to a depth of 0.7 foot bgs. Poorly Graded Gravel with Clay and Sand 5 2-8 2 (GP -GC): Reddish -brown, moist, dense, with fine to medium -grained sand and 10-inch minus cobbles. Poorly Graded Gravel with Sand (GP): Tan 8.2-10.6 to gray, moist to saturated, dense, with fine to coarse -grained sand and 8-inch minus cobbles. 2791 S Victory View Way • Boise, ID 83709 • (208) 376-4748 • Fax (208) 322-6515 Copyright www.mti-id.com • mti(cbmti-id.com ght©Testing 8 g& Inspection MATERIALS TESTING 6 INSPECTION 15 November 2018 Page #4of14 b180977g_addl ❑ Environmental Services ❑ Geotechnical Engineering ❑ Construction Materials Testing ❑ Special Inspections GEOTECHNICAL INVESTIGATION TEST PIT LOG Test Pit Log #: TP-26 Date Advanced: 29 Oct 2018 Logged by: Nick Stevens, G.I.T. Excavated by: Creighton Contracting, LLC Location: See Site Map Plates Latitude: 43.65666 Longitude:-116.45874 Depth to Water Table: 8.7 Feet bgs Total Depth: 12.5 Feet bgs Notes: Piezometer installed to 12.5 feet bgs. Depth Field Description and USCS Soil and Sample Sample Depth Qp Lab (Feet bgs) Sediment Classification Type (Feet bgs) Test ID Lean Clay (CL): Dark brown, dry to slightly 0.0-6.3 moist, soft to stiff. 0.5-1.0 --Plow zone noted to a depth of 1.4 feet bgs. Poorly Graded Gravel with Clay and Sand (GP -GC): Reddish -dark brown, slightly moist 6.3-8.7 to moist, medium dense to dense, with fine to medium -grained sand and 5-inch minus cobbles. Poorly Graded Gravel with Sand (GP): Tan to gray, saturated, dense, with fine to coarse- 8.7-12.5 grained sand and 11-inch minus cobbles. --Excessive sidewall caving noted throughout. 2791 S Victory View Way • Boise, ID 83709 • (208) 376-4748 • Fax (208) 322-6515 Copyright www.mti-id.com • mti6bmTesting 8 ti-id.com ght©g& Inspection MATERIALS TESTING 6 INSPECTION 15 November 2018 Page #5of14 b180977g_addl ❑ Environmental Services ❑ Geotechnical Engineering ❑ Construction Materials Testing ❑ Special Inspections GEOTECHNICAL INVESTIGATION TEST PIT LOG Test Pit Log #: TP-27 Date Advanced: 29 Oct 2018 Logged by: Nick Stevens, G.I.T. Excavated by: Creighton Contracting, LLC Location: See Site Map Plates Latitude: 43.65456 Longitude:-116.45861 Depth to Water Table: 8.9 Feet bgs Total Depth: 10.8 Feet bgs Notes: Piezometer installed to 10.8 feet bgs. Depth Field Description and USCS Soil and Sample Sample Depth Qp Lab (Feet bgs) Sediment Classification Type (Feet bgs) Test ID Lean Clay (CL): Dark brown, dry to slightly 0.0-3.9 moist, soft to stiff. 0.25-1.0 --Plow zone noted to a depth of 1.2 feet bgs. Sandy Silt (ML): Whitish -tan to light gray, slightly moist, very stiff to hard, with fine- 3.9-4.9 grained sand. --Weak calcium carbonate cementation noted throughout. Poorly Graded Gravel with Sand (GP): Tan to gray, slightly moist to saturated, dense to 4.9-10.8 very dense, with fine to coarse -grained sand and 8-inch minus cobbles. --Some silt content and calcium carbonate veining noted from 4.9 to S. 6 feet bgs. 2791 S Victory View Way • Boise, ID 83709 • (208) 376-4748 • Fax (208) 322-6515 Copyright www.mti-id.com • mti(cDmTesting 8 ti-id.com ght©g& Inspection MATERIALS TESTING 6 INSPECTION 15 November 2018 Page # 6 of 14 b180977g_addl ❑ Environmental Services ❑ Geotechnical Engineering ❑ Construction Materials Testing ❑ Special Inspections GEOTECHNICAL INVESTIGATION TEST PIT LOG Test Pit Log #: TP-28 Date Advanced: 29 Oct 2018 Logged by: Nick Stevens, G.I.T. Excavated by: Creighton Contracting, LLC Location: See Site Map Plates Latitude: 43.65425 Longitude:-116.46263 Depth to Water Table: 9.2 Feet bgs Total Depth: 11.5 Feet bgs Notes: Piezometer installed to 11.5 feet bgs. Depth Field Description and USCS Soil and Sample Sample Depth Qp Lab (Feet bgs) Sediment Classification Type (Feet bgs) Test ID Lean Clay (CL): Dark brown, dry to slightly moist, stiff to very stiff. 5- 0.0-5.6 --Plow zone noted to a depth of 1.4 feet bgs. 2.25 --Calcic veining noted from 2.5 to 5.6 feet bgs. Poorly Graded Gravel with Clay and Sand (GP -GC): Reddish -dark brown, slightly moist 5.6-8.7 to moist, medium dense to dense, with fine to coarse -grained sand and 4-inch minus cobbles. Poorly Graded Gravel with Sand (GP): Tan 8.7-11.5 to gray, moist to saturated, dense to very dense, with fine to coarse -grained sand and 8-inch minus cobbles. 2791 S Victory View Way • Boise, ID 83709 • (208) 376-4748 • Fax (208) 322-6515 Copyright www.mti-id.com • mti6bmTesting 8 ti-id.com ght©g& Inspection MATERIALS TESTING 6 INSPECTION 15 November 2018 Page #7of14 b180977g_addl ❑ Environmental Services ❑ Geotechnical Engineering ❑ Construction Materials Testing ❑ Special Inspections GEOTECHNICAL INVESTIGATION TEST PIT LOG Test Pit Log #: TP-29 Date Advanced: 29 Oct 2018 Logged by: Nick Stevens, G.I.T. Excavated by: Creighton Contracting, LLC Location: See Site Map Plates Latitude: 43.65349 Longitude:-116.46093 Depth to Water Table: 9.6 Feet bgs Total Depth: 11.4 Feet bgs Notes: Piezometer installed to 11.4 feet bgs. Depth Field Description and USCS Soil and Sample Sample Depth Qp Lab (Feet bgs) Sediment Classification Type (Feet bgs) Test ID Lean Clay (CL): Dark brown, dry to slightly moist, soft to stiff. 0.0-3.3 --Plow zone noted to a depth of 1.2 feet bgs. 0.5-1.25 --Calcic veining noted from 3.0 to 3.3 feet bgs. Sandy Silt (ML): Light gray to light brown, dry to slightly moist, hard, with fine-grained 3.3-5.5 sand. --Weak calcium carbonate cementation noted throughout. Poorly Graded Gravel with Sand (GP): Brown to gray, slightly moist to saturated, 5.5-11.4 dense to very dense, with fine to coarse - grained sand and 8-inch minus cobbles. --Some clay content noted to 7.2 feet bgs. 2791 S Victory View Way • Boise, ID 83709 • (208) 376-4748 • Fax (208) 322-6515 Copyright www.mti-id.com • mti(cDmTesting 8 ti-id.com ght©g& Inspection MATERIALS TESTING 6 INSPECTION 15 November 2018 Page # 8 of 14 b180977g_addl ❑ Environmental Services ❑ Geotechnical Engineering ❑ Construction Materials Testing ❑ Special Inspections GEOTECHNICAL INVESTIGATION TEST PIT LOG Test Pit Log #: TP-30 Date Advanced: 29 Oct 2018 Logged by: Nick Stevens, G.I.T. Excavated by: Creighton Contracting, LLC Location: See Site Map Plates Latitude: 43.65256 Longitude:-116.47153 Depth to Water Table: 9.3 Feet bgs Total Depth: 11.5 Feet bgs Notes: Piezometer installed to 11.5 feet bgs. Depth (Feet bgs) Field Description and USCS Soil and Sediment Classification Sample Type Sample Depth (Feet bgs) Qp Lab Test ID Lean Clay (CL): Dark brown, dry to slightly 0.25- 0.0-6.2 moist, soft to medium stiff. 0.75 --Plow zone noted to a depth of 1.3 feet bgs. Poorly Graded Gravel with Sand (GP): Light 6.2-11.5 brown to gray, slightly moist to saturated, dense to very dense, with fine to coarse - grained sand and 5-inch minus cobbles. 2791 S Victory View Way • Boise, ID 83709 • (208) 376-4748 • Fax (208) 322-6515 Copyright www.mti-id.com • mti(a mti-id.com ght©2018 Materials Testing &Inspection MATERIALS TESTING 6 INSPECTION 15 November 2018 Page # 9 of 14 b180977g_addl ❑ Environmental Services ❑ Geotechnical Engineering ❑ Construction Materials Testing ❑ Special Inspections GEOTECHNICAL INVESTIGATION TEST PIT LOG Test Pit Log #: TP-31 Date Advanced: 29 Oct 2018 Logged by: Nick Stevens, G.I.T. Excavated by: Creighton Contracting, LLC Location: See Site Map Plates Latitude: 43.65234 Longitude:-116.46827 Depth to Water Table: 10.8 Feet bgs Total Depth: 11.7 Feet bgs Notes: Piezometer installed to 11.7 feet bgs. Depth Field Description and USCS Soil and Sample Sample Depth Qp Lab (Feet bgs) Sediment Classification Type (Feet bgs) Test ID Lean Clay (CL): Dark brown, dry to slightly 0.0-2.7 moist, soft to stiff. 0.5-1.25 --Plow zone noted to a depth of 1.4 feet bgs. Sandy Silt (ML): Light gray to brown, dry to 2 7-5 2 slightly moist, hard, with fine-grained sand. --Weak calcium carbonate cementation noted throughout. Poorly Graded Gravel with Sand (GP): Tan 5.2-11.7 to gray, slightly moist to saturated, dense to very dense, with fine to coarse -grained sand and 7-inch minus cobbles. 2791 S Victory View Way • Boise, ID 83709 • (208) 376-4748 • Fax (208) 322-6515 Copyright www.mti-id.com • mti6bmTesting 8 ti-id.com ght©g& Inspection MATERIALS TESTING 6 INSPECTION 15 November 2018 Page # 10 of 14 b180977g_addl ❑ Environmental Services ❑ Geotechnical Engineering ❑ Construction Materials Testing ❑ Special Inspections GEOTECHNICAL INVESTIGATION TEST PIT LOG Test Pit Log #: TP-32 Date Advanced: 29 Oct 2018 Logged by: Nick Stevens, G.I.T. Excavated by: Creighton Contracting, LLC Location: See Site Map Plates Latitude: 43.65260 Longitude:-116.46399 Depth to Water Table: 11.0 Feet bgs Total Depth: 11.3 Feet bgs Notes: Piezometer installed to 11.3 feet bgs. Depth Field Description and USCS Soil and Sample Sample Depth Qp Lab (Feet bgs) Sediment Classification Type (Feet bgs) Test ID Lean Clay (CL): Dark brown, dry to slightly 0.0-1.8 moist, medium stiff to stiff. 0.75-1.5 --Plow zone noted to a depth of 1.4 feet bgs. Sandy Silt (ML): Light brown, dry to slightly 1.8-6.3 moist, hard, with fine-grained sand. --Weak calcium carbonate cementation noted throughout. Poorly Graded Gravel with Sand (GP): Tan 6.3-11.3 to gray, dry to saturated, dense to very dense, with fine to coarse -grained sand and 5-inch minus cobbles. 2791 S Victory View Way • Boise, ID 83709 • (208) 376-4748 • Fax (208) 322-6515 Copyright www.mti-id.com • mti6bmTesting 8 ti-id.com ght©g& Inspection MATERIALS TESTING 6 INSPECTION 15 November 2018 Page # 11 of 14 b180977g_addl ❑ Environmental Services ❑ Geotechnical Engineering ❑ Construction Materials Testing ❑ Special Inspections GEOTECHNICAL INVESTIGATION TEST PIT LOG Test Pit Log #: TP-33 Date Advanced: 29 Oct 2018 Logged by: Nick Stevens, G.I.T. Excavated by: Creighton Contracting, LLC Location: See Site Map Plates Latitude: 43.65539 Longitude:-116.46532 Depth to Water Table: 9.8 Feet bgs Total Depth: 10.9 Feet bgs Notes: Piezometer installed to 10.9 feet bgs. Depth Field Description and USCS Soil and Sample Sample Depth Qp Lab (Feet bgs) Sediment Classification Type (Feet bgs) Test ID Lean Clay (CL): Brown, dry to slightly moist, 0.75- 0.0-3.1 medium stiff to stiff. 1.75 --Plow zone noted to a depth of 1.2 feet bgs. Sandy Silt (ML): Light brown, dry to slightly moist, very stiff to hard, with fine-grained 3.1-5.4 sand. --Weak calcium carbonate cementation noted throughout. Poorly Graded Gravel with Sand (GP): Brown to gray, slightly moist to saturated, 5.4-10.9 dense to very dense, with fine to coarse - grained sand and 8-inch minus cobbles. --Some clay content noted to 7.3 feet bgs. 2791 S Victory View Way • Boise, ID 83709 • (208) 376-4748 • Fax (208) 322-6515 Copyright www.mti-id.com • mti6bmTesting 8 ti-id.com ght©g& Inspection MATERIALS TESTING 6 INSPECTION 15 November 2018 Page # 12 of 14 b180977g_addl ❑ Environmental Services ❑ Geotechnical Engineering ❑ Construction Materials Testing ❑ Special Inspections GEOTECHNICAL INVESTIGATION TEST PIT LOG Test Pit Log #: TP-34 Date Advanced: 29 Oct 2018 Logged by: Nick Stevens, G.I.T. Excavated by: Creighton Contracting, LLC Location: See Site Map Plates Latitude: 43.65484 Longitude:-116.46848 Depth to Water Table: 10.3 Feet bgs Total Depth: 12.8 Feet bgs Notes: Piezometer installed to 12.8 feet bgs. Depth Field Description and USCS Soil and Sample Sample Depth Qp Lab (Feet bgs) Sediment Classification Type (Feet bgs) Test ID Lean Clay (CL): Brown, dry to slightly moist, 0.0-3.3 soft to stiff. 0.5-1.25 --Plow zone noted to a depth of 1.2 feet bgs. Sandy Silt (ML): Light brown, dry to slightly 3.3-8.1 moist, hard, with fine-grained sand. --Weak calcium carbonate cementation noted throughout. Poorly Graded Sand with Silt (SP-SM): Light 8.1-9.9 brown to tan, moist to wet, medium dense, with fine to coarse -grained sand. Poorly Graded Gravel with Sand (GP): Tan 9.9-12.8 to gray, wet to saturated, dense to very dense, with fine to coarse -grained sand and 7-inch minus cobbles. 2791 S Victory View Way • Boise, ID 83709 • (208) 376-4748 • Fax (208) 322-6515 Copyright www.mti-id.com • mti(cbmti-id.com ght©Testing 8 g& Inspection MATERIALS TESTING 6 INSPECTION 15 November 2018 Page # 13 of 14 b180977g_addl ❑ Environmental Services ❑ Geotechnical Engineering ❑ Construction Materials Testing ❑ Special Inspections GEOTECHNICAL INVESTIGATION TEST PIT LOG Test Pit Log #: TP-35 Date Advanced: 29 Oct 2018 Logged by: Nick Stevens, G.I.T. Excavated by: Creighton Contracting, LLC Location: See Site Map Plates Latitude: 43.65440 Longitude:-116.47120 Depth to Water Table: 11.3 Feet bgs Total Depth: 12.3 Feet bgs Notes: Piezometer installed to 12.3 feet bgs. Depth Field Description and USCS Soil and Sample Sample Depth Qp Lab (Feet bgs) Sediment Classification Type (Feet bgs) Test ID Lean Clay (CL): Dark brown, dry to slightly 0.0-3.3 moist, soft to stiff. 1.25 1.25 --Plow zone noted to a depth of 1.4 feet bgs. Sandy Silt (ML): Light brown to gray, dry to 3.3-9.7 slightly moist, hard, with fine-grained sand. --Weak calcium carbonate cementation noted throughout. Poorly Graded Gravel with Sand (GP): Tan 9.7-12.3 to gray, slightly moist to saturated, dense to very dense, with fine to coarse -grained sand and 9-inch minus cobbles. 2791 S Victory View Way • Boise, ID 83709 • (208) 376-4748 • Fax (208) 322-6515 Copyright www.mti-id.com • mti6bmTesting 8 ti-id.com ght©g& Inspection Site Map Plate 2 NOTES: - Not to Scale • Aerial Photograph by Environmental c e�i Risk Information Services TP-25 TP-26 TP-20 TP 18 ® - TP-24 TP-21 TP-27 TP-23 TP-22 M 0 m 0 0 TP-30 TP-31 o T1-2 T® TB 1 TP-1 1 - TP-17 TP-16 77 Ll ' LEGEND Approximate Site —__—__— Boundary Approximate MTI Test 8 Pit Location - Advanced 29 June 2018 Approximate MTI Test Pit Location - Advanced 16 July 2018 Approximate MTI Test 8 Pit Location - Advanced 29 October 2018 Approximate MTI Test Pit Location with Piezometer N co Oaks North Subdivision Northeast Corner of McDermott Road and McMillan Road Meridian, ID Modified by: NGS 6 November 2018 LTP12 TP 11 Y• Drawing: B180977g " MCMILLAN ROAD r' p � _ MATERIALS xs�_I `KA ; = TESTING & INSPECTION lot 2791 S. Victory View Way Phone: 208 376-4748 Boise, ID 83709-2835 Fax: 208 322-6515 y �� E-mail: mti@mti-id.com TP-14 ;,