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Section Title

A breakdown of our quality policy and how we ensure DC Mechanical quality standards through every project. 

Our procedures section breaks down our process from preparatory inspection all the way to final inspection. 

Before we can complete any project, we must complete an extensive check list to ensure all work is up to DC Mechanical standards. 

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Quality Control


Our philosophy is to ensure the highest level of quality, complete compliance with specifications and drawings, and systems that function properly and meet the needs of the owner.


Through strict adherence to a well-defined quality control program, DC Mechanical strives to attain a uniform, high level of workmanship during the procurement, fabrication, construction and installation of equipment and facilities. To guarantee this end, the following principles are monitored:


  1. Assure the highest quality by maintaining supervised controls and written instructions governing quality control procedures and practices. Establish clearly defined responsibility and authority for compliance.

  2. Conform to all contractual requirements, specifications and the DC Mechanical quality control program. Compile accurate records of inspection test certifications and other required documentation.

  3. Notify project management of quality discrepancies for immediate corrective action. Assure that corrective action is implemented properly.



The control of on-site construction includes performing sufficient inspections and tests of all work items, including that of suppliers and subcontractors, to ensure conformance with applicable specifications and drawings. This is accomplished through the following methods:


  • Preparatory Inspection- Performed during the beginning stages of each definable feature of work

    • Review contract requirements.

    • Check to Assure that all materials and/or equipment are on hand and have been tested, submitted, and approved as required.

    • Check to assure that provisions have been made to provide required control testing.

    • Examine work area to assure that all preliminary work has been accomplished.

  • Initial Inspections- Performed as soon as a representative portion of the particular feature of work has been accomplished

    • Check for compliance with contract documents.

    • Review of control testing.                                                                                            

    • Check for use of defective or damaged materials.

    • Check for omissions.

    • General check of dimensional requirements.


Drawing and Document Control


Contract drawings, work orders and change orders issued for projects will also be issued to the Project Manager. No technical information will be replaced or revised without receipt of a properly authorized change notice, revision or equal.


Materials Certification


Copies of all purchase orders or subcontracts requiring inspection will be given to the quality control team for receiving and recording purposes. When the purchase order requires vendor certification of materials, equipment or supplies, such certifications shall be verified for accuracy and conformance and may be used in lieu of a test for those properties covered by the certification.  Copies of all certifications received will be maintained in the quality control folder and will be available to the contracting officer upon request or submitted, as required.


Workmanship Inspection


Items which will be embedded in the concrete placement, or areas which will be covered by a preceding operation, will be inspected by the designated QC manager. The appropriate field foreman shall verify, by signature, that all items installed are done in accordance with the contract drawings and specifications prior to the placement of concrete or covering. Any corrective action required will be recorded.











Final Inspection and Test


Prior to final inspection, or starting of any tests, all systems being inspected or tested shall be completed and accepted by quality control. After this acceptance, the final inspection and test may proceed in accordance with the following steps:

  • Verify that test personnel have a working knowledge of the special characteristics of the instruments being used.

  • Note the inspection or test requirements and criteria of successful completion of the required inspection or test.

  • Upon satisfactory verification of these requirements, the test may proceed. Each reading will be verified and documented by the authorized testing representative. All functional validations or tests will be performed by the quality control department unless otherwise noted. No functional test will be accepted without properly authorized and approved test procedures.

  • The general requirements of final acceptance will include, but are not limited to the following:

    • General appearance

    • Workmanship

    • Cleanliness or areas and equipment

    • Identification of equipment

    • Painting

    • Removal of unused material and temporary facilities

    • Condition of job files and completion of paperwork

Knowing that every project is unique, DC Mechanical takes the time early on to construct a customized quality control plan addressing project specific requirement. Our goal on every project as well as being one of our core values is to “Provide quality on schedule and at a competitive rate."

Commissioning, Close-out and Start-Up


DC Mechanical performs commissioning work for all mechanical systems. By utilizing our in-house project personnel, it allows us to start planning for commissioning and start-up at a much earlier point in the process which ultimately saves headaches at the end. The purpose of the commissioning process is to provide the owner/operator of the facility with a high level of assurance that the mechanical systems have been installed in the prescribed manner and will operate within the performance guidelines. DC Mechanical will provide the owner with an unbiased objective view of the systems installation, operations, and performance. Customized start-up and commissioning plans are developed for each project.


Closeout is one of the most critical times in project’s completion and to guarantee its success, planning begins during preconstruction. DC Mechanical has created a closeout policy that makes the end stages of a project far more satisfying and ensures that owners and clients have all the information they will need to manage and operate their facility in an efficient, cost effective, and productive manner going forward. Our process, which was designed with owner input, includes;


Testing Reports: Testing reports are documented and filed onsite. These reports will be available for all to review at any time.


Pre-Punch Lists: We generate our own internal punch list and make corrective actions prior to the walks by the GC or design team, thus saving time and ensuring a higher quality project.


Final Punch Lists: For each item that is on the final list, a project engineer or foreman is assigned to track and manage it to guarantee prompt correction and sign off is obtained quickly.


Operations & Maintenance Manuals: Electronic, searchable, Operations and Maintenance manuals are distributed at the completion of major phases of the project giving facility managers information at their fingertips in an east to find manner.


Project Transfer: When a project is transferred to an owner, we work closely with the owners’ technicians to transfer responsibilities for the maintenance of new equipment.


Service & Maintenance: To assist our owners in maintaining the quality and longevity of their systems, DC Mechanical also offers ongoing service and maintenance of all your systems.

Final Looks

Our Process

DC Mechanical Brings Quality to YOU

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