HomeMy WebLinkAbout2020-08-03-hlm_citgo_psl_eng-PROFESSIONAL ENGINEER REPORTCoastal Technology Center · 721 North Drive, Suite A, Melbourne, Florida 32934 Phone (321) 473-3671
August 3, 2020
Mr. William Durden
Plans Examiner
St. Lucie County Planning & Development Services
Building & Code Regulation Division
2300 Virginia Avenue
Fort Pierce, FL 34982
RE:Professional Engineer’s Report
Installation of Temporary Groundwater Remediation System at Citgo Port St. Lucie
7201 S US Highway 1,Port St. Lucie, FL 34952
Permit Numbers SLC 2003-0317 and SLC 2007-0267
Dear Mr. Durden:
HLM Environmental Remediation, Inc. (HLM)is pleased to submit this Professional Engineer’s
Report for the installation of a temporary groundwater remediation system for the Citgo Port St.
Lucie facility located at 7201 S US Highway 1 in Port St. Lucie,St. Lucie County, Florida.HLM
has installed the Multi Phase Extraction (MPE) groundwater remediation system under a contract
with the Florida Department of Environmental Protection (FDEP).
This letter serves as a Professional Engineer’s attestation that the MPE remediation system has
been installed in accordance with the applicable codes and guidelines referenced in the Florida
Building Code 6th Edition (2017), the St. Lucie Building Permits SLC 2003-0317 and SLC 2007-
0267, and the FDEP-approved Remedial Action Plan Modification prepared by HLM.The
engineer of record, Steven L. Brashers, P.E., has reviewed pictures and field notes provided by
the installation contractor, HLM, and discussed the construction progress in telephone
conversations with the general contractor, Don Martin.
The permit 2003-0317 includes the system installation and electrical. The permit 2007-0267
includes the wooden stockade fence that surround the remediation equipment compound.
The following gives a brief description of the construction conducted to install the MPE system
and includes pictures of the construction activities.HLM performed the system installation and
Boys Electrical Contractors LLC performed the electrical work for the new power pole and meter.
HLM completed the installation of the MPE system in July 2020. The 9 ft by 15 ft by 6-inch-thick
monolithic slab for the equipment compound located near the northwest corner of the property
was formed on grade, reinforced with 6x6 W1.4 x W1.4 welded wire fabric. The wire mesh was
placed in the middle of the slab approximately 3 inches from the compacted sand bottom.The
4,000 psi fiber mesh concrete slab was completed in one pour,leveled, and completed with a
brush finish.
DocuSign Envelope ID: C6C765CC-7CC3-4E95-A55D-2ABB849F2C89
Mr. William Durden
Engineer’s Report for SLC-2003-0317
Citgo PSL
August 3, 2020
Page 2
July 2020: HLM crew pouring new 9 ft x 15 ft
x 6-inch-thick concrete pad for remediation
equipment
July 2020: HLM crew leveling concrete slab
DocuSign Envelope ID: C6C765CC-7CC3-4E95-A55D-2ABB849F2C89
Mr. William Durden
Engineer’s Report for SLC-2003-0317
Citgo PSL
August 3, 2020
Page 3
The concrete equipment pad was allowed to cure and then the MPE equipment enclosure was
placed on it.
July 2020: MPE equipment enclosure placed
on new concrete slab
July 2020: HLM uses 4-ft by 5/8-inch mobile
home anchors placed in concrete at the
corners of the equipment enclosure and
connected to straps that loop over the top of
the enclosure
DocuSign Envelope ID: C6C765CC-7CC3-4E95-A55D-2ABB849F2C89
Mr. William Durden
Engineer’s Report for SLC-2003-0317
Citgo PSL
August 3, 2020
Page 4
July 2020: Straps connected to the mobile
home anchors
July 2020: Straps connected to the mobile
home anchors
DocuSign Envelope ID: C6C765CC-7CC3-4E95-A55D-2ABB849F2C89
Mr. William Durden
Engineer’s Report for SLC-2003-0317
Citgo PSL
August 3, 2020
Page 5
The equipment enclosure has a standalone electrical system that is separate to the existing
property improvement’s power meter.A new meter box and disconnect was installed outside the
equipment enclosure.
July 2020: Remediation equipment
compound electrical meter, disconnect, and
control panel
July 2020:Remediation equipment
compound electrical meter, disconnect, and
control panel
DocuSign Envelope ID: C6C765CC-7CC3-4E95-A55D-2ABB849F2C89
Mr. William Durden
Engineer’s Report for SLC-2003-0317
Citgo PSL
August 3, 2020
Page 6
The equipment compound is surrounded by a 12 ft x 23 ft x 6 ft wooden stockade fence with
access gates.
July 2020: View of completed 6-ft wood fence
surrounding the equipment compound.
July 2020: View of completed 6-ft wood fence
surrounding the equipment compound.
After the final inspections have been approved and there is power to the system, HLM will perform
a 3-day startup test period of the MPE remediation system prior to placing the system in use.
If you have any questions, please contact me or Don Martin at 321-473-3671.
Sincerely,
HLM Environmental Remediation, Inc.
Steven L. Brashers, P.E.
Senior Engineer
FL P.E. 471511
1 I, Steven L. Brashers, P.E., certify that I currently hold an active Professional Engineering license #47151
in the state of Florida and am competent through education and experience to provide the engineering
services contained in this report. I further certify that, in my professional judgment, this report meets the
applicable requirements of Chapter 62-780, Florida Administrative Code, and was prepared by me or under
my responsible charge. In accordance with the provisions of Chapter 471, Florida Statutes, I certify that
this document conforms to current standards of engineering practices and principles and meets applicable
professional standards. Moreover, I certify that HLM holds an active Certificate of Authorization #30432 to
provide the engineering service with the Florida Department of Business and Professional Regulation.
DocuSign Envelope ID: C6C765CC-7CC3-4E95-A55D-2ABB849F2C89
8/3/2020