1601 N Bristol St - Phase 1 - Plan

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Mr. Amir Houriani Project No. 32-6235-00 1601-1607 N. Bristol Street August 29, 2022 CLASSIFICATION CITY OF SANTA ANA Planning and Building Agency n ,lS. PageApproved FOR PERMIT ISSUANCE Master ID: Date: Soils were classified visually according to the Unified Soil Classification System. Unit weight and moisture determinations were performed for each undisturbed sample. Results of density and moisture determinations, together with classifications, are shown on the enclosed Boring Logs. LOAD CONSOLIDATION TEST (ASTM:D-2435) To investigate the vertical displacement response (settlement) of the on -site soils to the anticipated applied pressure from the proposed foundations, consolidation testing was performed on a representative undisturbed sample. Axial stresses were conservatively carried to a maximum of 9,400psf which far exceed the degree of stress that the soils will likely be subjected to from the structural loads of the proposed development. To expedite consolidation, assess collapse potential, and simulate possible adverse field conditions, water was added at an applied stress of 2,350psf. Compressibility of the soils within the zone of significant stress was investigated and the result considered in our engineering analyses. A graphic plot of the load consolidation curve has been enclosed in this report. DIRECT SHEAR TESTS (ASTM:D-3080) In order to determine the shear strength of the soils, direct shear tests were performed on remolded and undisturbed samples of the on -site soils. The remolded sample was tested at 90% of the maximum dry density. To simulate possible adverse field conditions, the samples were saturated prior to shearing. Graphic summaries of the test results, including moisture content at the time of shearing, are included in this report. GRAIN SIZE DISTRIBUTION (ASTM:D-422) To aid in classification, a sieve analysis and a hydrometer test were performed on a representative sample of the surficial soils. The results of the tests, along with fine percentages, are shown on the enclosed Grain Size Distribution Chart and Boring Logs. ATTERBERG LIMITS (ASTM:D-4318) To characterize the fine-grained fractions of the on -site soils, the liquid limits, plastic limits, and plasticity indexes, known as the Atterberg Limits, was determined. These values are utilized to correlate with various engineering properties of fine-grained soils, including liquefaction susceptibility. Results from Atterberg Limits testing are shown on the enclosed Boring Logs. n �Q A.G.I. Geotechnical, Inc. • 16555 Sherman Way, Suite A • Van Nuys, CA 91406 L�1 Office: (818)785-5244 • Facsimile: (818)785-6251