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Home My WebLink AboutGFA PAPERS�[r2►i iT 1�12 -QS 3S Florida's Leading Engineering Source Environmental • Geotechnical • Construction Materials Testing • Threshold and Special Inspections • Plan Review & Code Compliance Skidoo LLC Attn: Ms. Laura Sharp 4521 PGA Blvd., No. 424 Palm Beach Gardens, Florida SCANNED BY ;t Lucie County 33418 RE: Report of Soil Exploration Wheel Chair Ramp 5350 Street Blvd., Fort Pierce, Florida GFA Project No. 18-9377.00 — Rev #1 Dear Ms. Sharp: RECENED OCT T 5 2010 Permitting Department St. Lucie county rvr+ October 11, 2018 GFA International, Inc. (GFA) performed an auger boring with hand cone penetrometer testing at the above referenced project site. The boring location is illustrated on the attached Test Location Plan. The subsurface exploration activities were performed in accordance with Chapter 18 of the 2017 Florida Building Code, Sixth Edition and applicable ASTM standards. Detailed information for the subsurface conditions encountered in the boring is contained on the attached boring log. Based on the test results, the soils upon which the referenced structure will be constructed are capable of providing a maximum allowable bearing capacity of 2,500 psf subject to the limitations noted herein. We recommend that the footings bear at a depth of at least 12 inches below finish grade. The depth should be measured from the lowest adjacent grade. We also recommend a minimum footing width of 18 inches for spread footings and 16 inches for monolithic footings, but not less than 8 inches more than the width of the imposed wall. This report does not state or imply that the foundation soils at the bearing level will remain in the original condition in which they were found during the subsurface exploration activities. Exposure to the environment may weaken the foundation soils at the bearing level if the foundation excavations remain open for an extended period, or if the foundation soils are exposed to rainfall. Consequently, it is recommended that the excavations for the wall and column footings be performed to final grade and footings be constructed as soon as possible to reduce the potential for deterioration of the bearing soils. GFA estimates that that the site is near or at design grade. The 2 feet of soils below existing grade, below the bottom of all new footing excavations and slabs, and all fill material should be compacted to at least 95 percent of the modified Proctor (ASTM D 1557) maximum dry density prior to placement of concrete for the footings. Note that differential settlement between the existing building and the proposed ramp is anticipated. Therefore, construction joints between the existing and new structures should be considered if the ramp will be attached to the existing building. During site preparation, foundations and the below grade remains of any structures that are within the footprint of the new construction should be removed. Similarly, existing utility lines should be removed or properly abandoned so that they will not adversely impact new overlying structures. 607 NW Commodity Cove • Port St. Lucie, Florida 34986 • (772) 924.3575 • (772) 924.3580 (fax) • www.teamgfa.com OFFICES THROUGHOUT FLORIDA Wheel Chair Ramp 5350 Street Blvd., Fort Pierce, Florida GFA Project No. 18-9377.00 -Rev #1 October 11, 2018 Page 2 GFA should be provided the opportunity to review the final foundation design plans and specifications to determine whether GFA's recommendations have been properly interpreted, communicated, and implemented. If GFA is not afforded the opportunity to participate in construction related aspects of foundation installation as recommended in this report or any report addendum, GFA cannot accept responsibility for the interpretation of our recommendations made in this report or in a report addendum for foundation performance. We appreciate the opportunity to be of service to you on this project and look forward to a continued association. Please contact the undersigned if you have any questions or comments, or if we may further assist you as your plans proceed. Respectful] %ltt,;dtI GFA IlyZt3 INC. Florio a'.l)ja?orization No. 4930 OCENSF'•.• �Oi ST OF John j� p<�RiDP.•�G� jt7.11-143 �� Craig Van Collie, E.I. Senior" "FfLk.��g��i`,aM1` Project Manager Florida Re- ibRIMU6A o. 63218 Attachments: Test Location Plan Auger Boring Log Notes Related to Boring Records Distribution: Ms. Laura Sharp - Skidoo LLC 1 pdf C�' IN ;opt. .`S n-c4r s `BFvd� 300 ft GFA Intemational PROJECT NUMBER 18-9377.00 DATE STARTED 9/26/18 COMPLETED 9/26/18. DRILLING CONTRACTOR GFAlntemationallnc. DRILLING METHOD Auger Boring - LOGGED BY CHECKED BY CVC NOTES BORING NUMBER AB-1 PAGE 1 OF 1 PROJECT NAME WheelChairRamp PROJECT LOCATION 5350 Steel Blvd. Fort Pieroe LATITUDE 27.49116 LONGITUDE-80.3808.6 GROUND WATER LEVELS: ATTIMEOFDRIWNG — AT END OF — AFTER DRILLING — w w UE" 0.0. W� wm a s a 0.0 MATERIAL DESCRIPTION. O a0 Z c.mL) =av_O Q gl 80 80 80 Dark 80 80 80 NOTES RELATED TO BORING RECORDS AND GENERALIZED SUBSURFACE PROFILES 1. Groundwater levels (if encountered) were recorded either during or following the boring completion on the date indicated. Fluctuations in groundwater levels are common - see the report text for a discussion. 2. The boring locations were identified in the field by estimated distances and offsets from existing reference marks and/or other site landmarks. 3. The completed boreholes were backfilled to adjacent site grade using drilling spoils and patched with asphalt cold mix in pavement areas. 4. The Log of Boring records represent our interpretation of soil conditions based on visual classification of the soil samples recovered from the borings. 5. The Log of Boring records are subject to the limitations, conclusions, and recommendations presented in the report text. 6. The StandardPenetrationTest (SPT) N-values contained on the Log of Boring records refer to the total blow counts of a 140-pound drop hammer falling 30 inches required to drive a split -barrel sampler a total distance of 12 inches into soil strata at speck depth intervals. 7. The Hand Cone Penetrometer (HCP) values contained on Log. of Boring records and the Cone Penetration Test (CPT) values contained on the Cone Penetration Sounding logs refer to the cone tip resistance recorded when pushing the cone tip into the soil strata at specific depth intervals. 8. The soil and/or rock strata interfaces shown on the Log of Boring records are approximate and may vary from those shown on the logs. The soil and/or rock descriptions shown on the Log of Boring records refer to conditions at the speck location tested. Soil/rock conditions may vary between test locations. 9. Relative density for coarse -grained soils.(sands/gravels) and consistency for fine-grained soils (silts/clays) are described as follows: Coarse Grained Soils (Sands and Gravels) Fine Grained Soils (Silts and Clays) HCP Value (kg/cm) .. CPT Value (tsf) Relative Density SPT N-Value HCP Value (kg/cmz) CPT Value (tsf) Consistency - 6 -2 Very Loose - 0-2 -3 Soft 17-36 21-40 Loose 3-4 21-35- 4-6 Soft L3150 37-116 41-120 Med. Dense 5-8 >35 7-12 Firm 117-196 121-200 Dense 9-15 - 13-25 Stiff > 196 >200 Very Dense 16-30 26-50 Very Stiff >30 >50 Hard 10. Grain size descriptions areas follows: Description - _ Particle Size Limits Boulder Greater than 12 inches Cobble 3 to 12 inches - Coarse Gravel /4 to 3 inches - Fine Gravel No. 4 sieve to 3/4 inch Coarse Sand No. 10 to No. 4 sieve Medium Sand No. 40 to No. 10 sieve Fine Sand No. 200 to No. 40 sieve Fines(Silt/Clay) Smaller than No. 200 sieve 11. Definitions for modifiers used in soil/rock descriptions: Proportion Modifier Approximate Root Diameter Modifier <5% Trace Less than /3z" Fine roots 5% to 12% . _ Little V3i' to �1, - - Small roots 12% to 30% Some 1 1/4- to 1" Medium roots. 30% to 50% And I Greater than 1" Large roots Organic Soils; Soils containing vegetative tissue in various stages of decomposition having a fibrous to amorphous texture. Usually having a dark brown to black color and an organic odor. Organic Content Modifiers: <25%: Slightly to Highly Organic; 25% to 75%: Muck; >75%: Peat _ GfH