The URL can be used to link to this page

Home My WebLink About206594-2d Hbk Ltr - signed/ Engineering siol compactionHeadquarters Mailing 11345 U.S. Highway 1 P.O. Box 78-1377 Sebastian, FL. 32958 Sebastian, FL. 32978 Orlando Phone: 772-589-0712 723 Progress Way C.A. # 5693 Sanford, FL. 32771 KSMengineering.net Proudly Serving Florida since 1990 Page 1 of 2 December 21, 2020 Grecnati Builders P.O. Box 9232 Port St Lucie, FL 34985 19105 Okeechobee Road Ft. Pierce, Florida Re: Soil Compaction after placement of Foundation KSM #: 206594-hbk To Whom It May Concern: KSM Engineering and Testing (KSM hereinafter) has been requested to perform subsurface testing in order to determine the degree of compaction of the stem wall footer soils under the existing structure as it has been brought to our attention that the stem wall footers were poured for the above mentioned single family structure without verification of the soil compaction. Representatives from KSM conducted the required exterior subsurface testing on December 18, 2020. Scope of Compaction test: Since the stem wall footers have been poured prior to the soil compaction testing, KSM is unable to perform standard compaction tests within the footprint of the structure or under the stem wall footer. In order not to undermine the existing stem wall footers, KSM technicians selected (4) random locations along the exterior of the structure to dig down adjacent to the stem wall footers. Locations were selected along each side of the structure in areas thus not to affect any landscaping or other means of construction. At this elevation KSM technicians collected a soil sample for the required modified proctor then performed a density reading using a nuclear density gauge against the stem wall footers of the structure. KSM technicians also used a static cone penetrometer to probe underneath the stem wall footers to determine the soil resistance beneath the footers. Upon completing the indicated density reading and probe, the location was filled back in with the existing soil. The exterior test locations are selected at random, unless KSM is instructed to perform the tests in certain areas by the Engineer of Record or Builder/Client submitted in writing prior to our visit to the site. With the collected field data, KSM followed the procedures indicated within ASTM D 1557 and ASTM D 6938 to determine the degree of compaction. Page 1 of 3 Headquarters Mailing 11345 U.S. Highway 1 P.O. Box 78-1377 Sebastian, FL. 32958 Sebastian, FL. 32978 Orlando Phone: 772-589-0712 723 Progress Way C.A. # 5693 Sanford, FL. 32771 KSMengineering.net Proudly Serving Florida since 1990 Page 2 of 2 Unless requested by the Engineer of Record or Builder/Client, KSM’s scope is to determine the exterior foundation degree of compaction only. The density gauge will only indicate the dry density of the soil 12” below the gauge. The visual observations of KSM serve to document or evaluate the condition of the structure or assemblies at the time of the inspection within a reasonable professional engineering probability and certainty. All conclusions or recommendations are based upon testing, observations, or information gathered on-site prior to completion of this document. If field conditions change or differ than as stated in this document, it is the responsibility of all parties to contact KSM for additional review. Conclusions and Recommendations: Please find the attached Soil Compaction Report following this letter (page 3 of the overall report) indicating the test results of the nuclear density gauge, modified dry proctor and static cone penetrometer readings. Based upon our review of the field collected data and laboratory testing, within a reasonable professional engineering certainty, the compaction of the soils underneath the stem wall footers meets or exceeds 95% of the modified dry proctor and the penetrometer readings indicate the soils to be generally firm, thus the soils are compacted properly within 12” below the stem wall footers bearing elevation within the areas tested. If you have any questions about this letter, please contact my office. Regards, Bryan E. Dahlke, P.E. Vice President of Engineering Florida Lic. No. 81439 12/21/2020 Email: grecnatibuilders@gmail.com Page 2 of 3 Headquarters 11345 U.S. Highway 1 Sebastian, FL. 32958 Orlando 723 Progress Way Sanford, FL. 32771 Mailing PO Box 78-1377 Sebastian, FL. 32978 Phone: 772-589-0712 C.A.# 5693 KSMengineering.net DATE TESTED:KSM JOB #:206594-2d/SH/ct PERMIT #:NUC #528 CONTRACTOR:Grecnati Builders Nuc Model:MC-1DR-P JOB LOCATION:19105 Okeechobee Road Nuc Serial #:MD049528 Ft. Pierce, Florida ITEM TESTED:Compacted Fill adjacent to existing Foundation TEST LOCATION OF SAMPLE DEPTH PEN READ DRY DENSITY MAX. DRY PROCTOR VALUE (P.C.F) PERCENT COMPACTION 1. N.E.0" - 12"39 107.8 111.3 96.9% 2. S.E."38 107.0 "96.1% 3. S.W."37 106.9 "96.0% 4. N.W."38 107.3 "96.4% Soil Description: Brown Sand In Place Moisture: 8.6% Proctor Optimum Moisture: 12.0% Proctor Max. Dry Density: P.C.F. 111.3 @ Test Locations the Density & Penetrometer readings indicate the Degree of Compaction Meets Minimum Requirement Respectfully Submitted: Bryan E. Dahlke, P.E. V.P. of Engineering PE # 81439 12/21/2020 Disclaimer: Contractor is responsible to maintain the tested area in the condition that KSM completed the indicated passed compaction test. KSM is not responsible if the tested area has been altered from the approved inspected condition. SOIL COMPACTION REPORT ASTM D 1557 and ASTM D 6938 December 18, 2020 19120434 Proudly Serving Florida since 1990 108.0 109.0 110.0 111.0 112.0 9 10 11 12 13 14 15 W E I G H T P . C . F . D R Y Moisture -% of Dry Weight Page 3 of 3