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Home My WebLink AboutOED - KSM - Soil Report LOT 9 (1.13.20)Headquarters: 11345 U.S. Highway 1 Sebastian, FL. 32958 Orlando: 723 Progress Way Sanford, FL. 32771 IV 0 Ik I ENGINEERING A% 1V1 AND TESTING Mailing: P.O. Box 78-1377 Sebastian, FL. 32978 Phone: 772-589-0712 C.A. # 5693 KSMengineering.net Revised: January 13, 2020 January 3, 2020 Matt Basaraba Ocean Estates Drive LLC 9508 Windy Ridge Rd. Windermere, FL 34786 Re: Lot 9, Avalon Beach North Hutchinson Island Fort Pierce, Florida KSM Project #: 195258-b Dear Mr. Basaraba: As requested, KSM Engineering & Testing has performed a subsurface investigation at the referenced site. Presentation of the data gathered during the investigation, together with our geotechnical related opinions, are included in this report. A. Site Description: At the time of drilling, the site was fairly flat and cleared. B. Project Description: A single-family residence is planned to be constructed on the site. Loads from the structure will be transferred to the ground by conventional shallow footings. We estimate the maximum loads will be less than 3,000 pounds per linear foot along the wall foundation. Some additional site fill will be required to reach the desired grades. Proudly Serving Florida since 1990 Headquarters: 11345 U.S. Highway 1 Sebastian, FL. 32958 Orlando: 723 Progress Way Sanford, FL. 32771 IV CA Ik I ENGINEERING A% AND TESTING Mailing: P.O. Box 78-1377 Sebastian, FL. 32978 Phone: 772-589-0712 C.A. # 5693 KSMengineering.net Lot 9, Avalon Beach -2- January 3, 2020 Fort Pierce, Florida C. The scope of our study consisted of the following: 1. Performed Standard Penetration Test Borings in the proposed construction area to estimate the subsoil relative density. 2. Measured the groundwater level at each boring. 3. Evaluated the existing soil conditions with respect to the proposed construction and provided recommendations for site preparation and foundation design. 4. Prepared this report to document our findings. D. Site Investigation: The site investigation program consisted of performing two (2) Standard Penetration Test borings (SPT), in the proposed construction area. The SPT borings were terminated at depths of 10 to 14 feet below grade. The locations of the borings are indicated on the attached boring logs. The SPT borings were completed in accordance with procedures described in ASTM D- 1586. A standard 1.5 inch l.D., 2 inch O.D. split-spoon sampler is driven into the soil by successive blows of a 140 pound hammer freely falling 30 inches. The number of blows required to drive the sampler 1 foot, after seating 6 in., is designated the Penetration Resistance, or "N" value. At regular intervals the sampler is extracted from the ground and opened to allow visual examination and classification of the retained soil sample. Also, the groundwater table was allowed to stabilize and the depth of the groundwater elevation recorded from existing grade. The records of the soils encountered, the penetration resistances and groundwater level are shown on the attached logs. Proudly Serving Florida since 1990 Headquarters: 11345 U.S. Highway 1 Sebastian, FL. 32958 Orlando: 723 Progress Way Sanford, FL. 32771 IV t I ENGINEERING JL% JLVA AND TESTING Mailing: P.O. Box 78-1377 Sebastian, FL. 32978 Phone: 772-589-0712 C.A. # 5693 KSMengineering.net Lot 9, Avalon Beach -3- January 3, 2020 Fort Pierce, Florida E. Engineering Evaluation and Conclusions: Based on the information obtained from this site investigation, we are pleased to offer the following evaluation: The boring logs indicate the subsurface soils consist mostly of fine-grained sand and slightly silty sand. Shell fragments were also found in the borings. "N" values recorded during the boring operation indicate the soil density is generally medium dense. Please refer to the soil boring logs for specific information relative to the soil description. Based on the existing soil conditions, the proposed structure can be supported on a shallow foundation system provided that the site is properly prepared. The following sections provide recommendations for the site preparation and foundation design. F. Site Preparation: The proposed building area and areas to be paved, plus a minimum margin of five feet beyond the proposed construction shall be stripped and grubbed of surface debris, including vegetation, roots and organic matter. The building area should be graded level and proofrolled. Any soft yielding areas shall be excavated and replaced with clean compacted fill. Sufficient passes should be made during compaction operations to produce a density no less than 95 percent of its modified dry Proctor value (ASTM D 1557) to a depth of two feet. After the exposed surface has been proofrolled, the building and pavement areas may be filled to the desired grades. The fill material shall consist of clean granular sand containing less than 10% material passing the U.S. Standard No. 200 mesh sieve. Place structural fill in loose layers of 12 inches in thickness and compact each lift to at least 95 percent of its modified dry Proctor value. We do not recommend heavy vibratory equipment on this site due to the proximity to the neighboring structures. After excavating for the footings, the disturbed footing subgrade should be recompacted to 95 percent (minimum) of its modified dry Proctor value. This can be best achieved by making several passes with a relatively light-weight walk-behind vibratory sled or roller. Proudly Serving Florida since 1990 Headquarters: 11345 U.S. Highway 1 Sebastian, FL. 32958 Orlando: 723 Progress Way Sanford, FL. 32771 TF CA I I ENGINEERING A% AND TESTING Mailing: P.O. Box 78-1377 Sebastian, FL. 32978 Phone: 772-589-0712 C.A. U 5693 KSMengineering.net Lot 9, Avalon Beach -4- January 3, 2020 Fort Pierce, Florida G. Foundation: Provided that our recommendations for site preparation are followed, the proposed structure may be supported on conventional concrete, steel reinforced footings designed for an allowable soil bearing pressure of 2,500 pounds per square foot, or less. With the foundation properly designed and the site properly prepared, we anticipate total settlements less than 3/4 of an inch and differential settlement of less than 1/4 of an inch. The majority of the settlement should occur during construction. H. Floor Slabs: A conventional slab-on-grade can be used in the "at grade" portion of the building. We recommend the disturbed subgrade below the floor slab be re-compacted to 95 percent of the modified Proctor maximum dry density (ASTM D 1557) prior to placement of the concrete. An estimated modulus of subgrade reaction of 150 pounds per cubic inch (pci) can be used for design of the slab-on-grade. We recommend that control joints be incorporated in the slab at frequent intervals to control shrinkage cracks. A moisture barrier is recommended beneath the floor slab to prevent moisture migration from the underlying soil resulting in dampness of the slab. Proudly Serving Florida since 1990 S S Headquarters: 11345 U.S. Highway 1 Sebastian, FL. 32958 Orlando: 723 Progress Way Sanford, FL. 32771 IV Ik I ENGINEERING £t iJ .IVL AND TESTING Mailing: P.O. Box 78-1377 Sebastian, FL. 32978 Phone: 772-589-0712 C.A. # 5693 KSMengineering.net Lot 9, Avalon Beach -5- January 3, 2020 Fort Pierce, Florida I. Closure: This report has been prepared in accordance with generally accepted soil and foundation engineering practices based on the results of the test borings and the assumed loading conditions. No warranties, either expressed or implied, are intended or made. This report does not reflect any variations which may occur between the borings. If variations appear evident during the course of construction, it would be necessary to re-evaluate the recommendations of this project. Environmental conditions, wetland delineation, water quality, and municipal requirements are not a part of this report. We areç to be of assistance to you on this phase of your project. When we may be of to,you or should you have any questions, please feel free to contact us. y II Iflfll VA. CV' STATE OF eller t o J E K/jt E-mail to: matt@gelcorp.net Proudly Serving Florida since 1990 NOTES See Attached Location Plan CLIENT Ocean Estates Drive LLC PROJECT NAME Lot 9 Avalon Beach PROJECT NUMBER 195258-b PROJECT LOCATION N. Hutchinson Island, Fort Pierce, Florida GROUND ELEVATION HOLE SIZE inches GROUND WATER LEVELS: DRILLING METHOD Split Spoon Sample V AT TIME OF DRILLING 6.25 ft LOGGED BY CH/SH/BB CHECKED BY JEK AT END OF DRILLING AFTER DRILLING -- DATE STARTED 12/30/19 COMPLETED 12/30/19 DRILLING CONTRACTOR 10 ca 3-3-5 (8) SS ss X SS SS 12-11-11 (22) SS KSM KSM Engineering & Testing P.O. Box 78-1377 Sebastian, FL 32978 Tel: (772)-589-0712 Fax: (772)-589-6469 BORING NUMBER B-I PAGE 1 OF 1 MATERIAL DESCRIPTION z Ui a- I—W 0 0 a- A SPT N VALUE A 20 40 60 80 PL MCLL I • I 20 40 60 80 o FINES CONTENT (%) 0 20 40 60 80 C) a. 0 0 Brown Sand with Traces of Roots Light Brown Sand with Traces of Shell Fragments Brown Sand with Traces of Clay Gray Sand, Slightly Silty Bottom of borehole at 14.0 feet. 0 9 5 : 8-13-15 (28) 5-7-9 (16) 13-15-14 (29) 15-18-20 (38) 20-22-20 (42) I I---- LU .. —a 0 X SS 3-4-5 (9) KSM Engineering & Testing K5}kt P.O. Box 78-1377 Sebastian, FL 32978 Tel: (772)-589-0712 Fax: (772)-589-6469 CLIENT Ocean Estates Drive LLC PROJECT NUMBER 195258-b DATE STARTED 12/30/19 COMPLETED 12/30/19 DRILLING CONTRACTOR DRILLING METHOD Split Spoon Sample LOGGED BY CH/SH/BB CHECKED BY JEK NOTES See Attached Location Plan BORING NUMBER B-2 PAGE 1 OF 1 PROJECT NAME Lot 9, Avalon Beach PROJECT LOCATION N. Hutchinson Island, Fort Pierce, Florida GROUND ELEVATION HOLE SIZE inches GROUND WATER LEVELS: AT TIME OF DRILLING 5.92 ft AT END OF DRILLING AFTER DRILLING A SPT N VALUE A 20 40 60 80 PL MC LL I • I 20 40 60 80 MATERIAL DESCRIPTION 0 0-0 0 D FINES CONTENT (%) 0 20 40 60 80 Brown Sand with Traces of Roots Light Brown Sand with Traces .of Shell or X SS Brown Sand with Some Clay 5 2 72 X SS SS Gray Sand, Slightly Silty SS 10 5-8-9 (17) 10-12-14 (26) 13-12-11 (23) 13-14-15 (29) Bottom of borehole at 10.0 feet. CEAESATES DR LOCATION OF SOIL BORINGS U CA lu 50 a - & PROJECT: Lot 9, Avalon Beach, North Hutchinson Island, Fort Pierce, Florida SHEET 1 OF PERMIT #: PROJECT #: 195258-b TF al 1 ff ENGINEERING JM AVL AND TESTING DRAWN BY: C.V. DESIGNED BY: J.K. DATE: 20200103 SCALE: NONE