7100 HARDESON RD SITE DEVELOPMENT Geotech Report 2025-03-04

GENERAL NOTES lrerracon DESCRIPTION OF SYMBOLS AND ABBREVIATIONS Community Transit Operations Base Expansion Everett,Washington GeoReport Terracon Project No.81205012 SAMPLING WATER LEVEL FIELD TESTS N Standard Penetration Test 0 Water Initially Resistance(Blows/Ft.) Encountered X 17 Grab Standard Water Level After a (HP) Hand Penetrometer 11 Sample Penetration Specified Period of Time Test - Water Level After (T) Torvane a Specified Period of Time �� Cave In (DCP) Dynamic Cone Penetrometer ° Encountered Water levels indicated on the soil boring logs are UC Unconfined Compressive the levels measured in the borehole at the times Strength indicated. Groundwater level variations will occur over time. In low permeability soils,accurate (pID) Photo-Ionization Detector determination of groundwater levels is not possible with short term water level observations. (OVA) Organic Vapor Analyzer DESCRIPTIVE SOIL CLASSIFICATION Soil classification as noted on the soil boring logs is based Unified Soil Classification System. Where sufficient laboratory data exist to classify the soils consistent with ASTM D2487 "Classification of Soils for Engineering Purposes"this procedure is used.ASTM D2488"Description and Identification of Soils(Visual-Manual Procedure)"is also used to classify the soils, particularly where insufficient laboratory data exist to classify the soils in accordance with ASTM D2487. In addition to USCS classification, coarse grained soils are classified on the basis of their in-place relative density, and fine-grained soils are classified on the basis of their consistency. See"Strength Terms"table below for details. The ASTM standards noted above are for reference to methodology in general. In some cases, variations to methods are applied as a result of local practice or professional judgment. ........... LOCATION AND ELEVATION NOTES Exploration point locations as shown on the Exploration Plan and as noted on the soil boring logs in the form of Latitude and Longitude are approximate. See Exploration and Testing Procedures in the report for the methods used to locate the exploration points for this project. Surface elevation data annotated with +/-indicates that no actual topographical survey was conducted to confirm the surface elevation. Instead, the surface elevation was approximately determined from topographic maps of the area. STRENGTH TERMS RELATIVE DENSITY OF COARSE-GRAINED SOILS I CONSISTENCY OF FINE-GRAINED SOILS (More than 50%retained on No.200 sieve.) (50%or more passing the No.200 sieve.) Density determined by Standard Penetration Resistance Consistency determined by laboratory shear strength testing,field visual-manual procedures or standard penetration resistance Descriptive Term Standard Penetration or Descriptive Term Unconfined Compressive Strength Standard Penetration or (Density) N-Value (Consistency) Qu,(tsf) N-Value Blows/Ft. Blows/Ft. Very Loose 0-3 Very Soft less than 0.25 0-1 Loose 4-9 Soft 0.25 to 0.50 2-4 Medium Dense 10-29 Medium Stiff 0.50 to 1.00 4-8 Dense 30-50 Stiff 1.00 to 2.00 8-15 Very Dense >50 Very Stiff 2.00 to 4.00 15-30 Hard >4.00 >30 RELEVANCE OF SOIL BORING LOG The soil boring logs contained within this document are intended for application to the project as described in this document. Use of these soil boring logs for any other purpose may not be appropriate.