Gas Leak Detection And Repair In The San Francisco Bay area
Fire Station No. 16, Lafayette, California - PG&E Gas Service Installation and Electrical Conduit Installation
MBS Engineering worked as a subcontractor for DL Falk on their project to construct a new fire station in Lafayette, CA. MBS Engineering was asked by DL Falk to install a new PG&E gas service line as well as conduits for electrical, telephone and cable service to the new building. MBS Engineering handled the full scope of asphalt/concrete cutting, excavation, pipe/conduit installation, backfill, and resurfacing of the roadway. MBS worked diligently to safely complete the work as it traversed the road. All pipe and conduit installed by MBS passed PG&E inspection the first time without any rework required.
Diablo Valley College, Pleasant Hill, California - Gas Infrastructure Upgrade Project
MBS performed a large Gas Infrastructure Upgrade Project for the Contra Costa County Community College District at Diablo Valley College in Pleasant Hill, CA, completing the project in the Summer of 2018. Working as the Prime Contractor, MBS was tasked with replacing and installing (9) underground isolation valves to better protect the gas system in place at Diablo Valley College. MBS also installed 450 LF of new 6” Polyethylene Underground Gas Line, making connections to (3) existing branch lines.
To complete the first phase of the project, installation of the (9) underground isolation valves, MBS used professional utility locating devices, in order to positively identify the path, depth and location of the gas lines. Once the path was identified, MBS excavated each area, creating a 5’x5’ bell hole, down to 2 feet below the existing pipe/manual shut-off valve. Once all areas were exposed, MBS quickly evaluated each location to determine the best way to install a PE valve at these locations. MBS was given (2) shut-down windows to complete the installation of these (9) valves, completing (4) of the installations within a 6 hour window. The other (5) locations were completed on a separate shutdown day, completing these within in an (8) hour window. The most complicated valve replacement location was found within an existing gas valve concrete vault. The existing (3) valves at this location were located approximately 5’ below the surface. MBS was forced to remove the 6’x6’x6’, 12” thick Concrete Vault from this area as the weight of the vault was on top of the gas pipe. MBS utilized a large crane for the removal of this vault, and provided the demolition to haul off site. Once removed, and similar to all other valve installations, MBS utilized our certified PG&E PE pipe fusion crews to transition from the existing steel gas pipe to PE gas pipe, in order to accommodate the PE Valves to be installed.
The second phase of this project involved MBS installing 450 LF of new 6” Polyethylene, Underground Gas Piping. MBS replaced an existing 4” steel line that was in place previously feeding this portion of the campus. During the excavation portion of this project, MBS discovered a large portion of the trench was a tough sand stone material, making the digging very difficult and time consuming. MBS employed more labor in order to stick to the schedule provided and make quick work of this area. MBS also connected this line to (3) branch lines, using saddle style tapping tees for the connection. The entire installation was completed using PG&E certified installers, following the strict PG&E standards and procedures for installing 6” Underground Gas Piping.
To complete the first phase of the project, installation of the (9) underground isolation valves, MBS used professional utility locating devices, in order to positively identify the path, depth and location of the gas lines. Once the path was identified, MBS excavated each area, creating a 5’x5’ bell hole, down to 2 feet below the existing pipe/manual shut-off valve. Once all areas were exposed, MBS quickly evaluated each location to determine the best way to install a PE valve at these locations. MBS was given (2) shut-down windows to complete the installation of these (9) valves, completing (4) of the installations within a 6 hour window. The other (5) locations were completed on a separate shutdown day, completing these within in an (8) hour window. The most complicated valve replacement location was found within an existing gas valve concrete vault. The existing (3) valves at this location were located approximately 5’ below the surface. MBS was forced to remove the 6’x6’x6’, 12” thick Concrete Vault from this area as the weight of the vault was on top of the gas pipe. MBS utilized a large crane for the removal of this vault, and provided the demolition to haul off site. Once removed, and similar to all other valve installations, MBS utilized our certified PG&E PE pipe fusion crews to transition from the existing steel gas pipe to PE gas pipe, in order to accommodate the PE Valves to be installed.
The second phase of this project involved MBS installing 450 LF of new 6” Polyethylene, Underground Gas Piping. MBS replaced an existing 4” steel line that was in place previously feeding this portion of the campus. During the excavation portion of this project, MBS discovered a large portion of the trench was a tough sand stone material, making the digging very difficult and time consuming. MBS employed more labor in order to stick to the schedule provided and make quick work of this area. MBS also connected this line to (3) branch lines, using saddle style tapping tees for the connection. The entire installation was completed using PG&E certified installers, following the strict PG&E standards and procedures for installing 6” Underground Gas Piping.
Fairmont Hotel - San Jose
MBS Engineering completed a seismic upgrade project at the Fairmont Hotel in San Jose to better protect their gas system in the event of an earthquake. We installed automatic seismic gas shut-off valves in (5) locations and seismic flex connectors at (7) different boilers around the property, and worked with the hotel to time the gas shut-downs without any complaints from hotel guests.
Confidential San Francisco School - Gas System Upgrade
MBS Engineering was asked by a school district in the Bay Area to determine why they were experiencing alarms due to low gas pressure at the large boilers that heat the pool. MBS Engineering determined the problem was due to a gas pressure regulator being installed at the wrong location and the solution was to install gas pressure regulators at each boiler to keep up with their high demand. The factory certified gas regulator mechanics at MBS Engineering completed the modifications for the gas pressure regulators and moved some manual shut-off valves to more accessible locations.
SF Bay Area School - Gas System Upgrade
MBS Engineering was asked by a school district in the Bay Area to determine why they were experiencing alarms due to low gas pressure at the large boilers that heat the pool. MBS Engineering determined the problem was due to a gas pressure regulator being installed at the wrong location and the solution was to install gas pressure regulators at each boiler to keep up with their high demand. The factory certified gas regulator mechanics at MBS Engineering completed the modifications for the gas pressure regulators and moved some manual shut-off valves to more accessible locations.
Benicia Unified School District - Gas Leak Surveys
MBS Engineering worked with the Benicia Unified School District to perform gas leak surveys of all the school campuses in their district. Using our state-of-the-art leak detection equipment MBS surveyed all underground and above-ground gas piping at their schools to find any gas leaks before they turned into more serious issues or even emergencies. MBS Engineering provided the Benicia USD staff with detailed reports with our findings and recommendations to correct any issues found.
Campbell Union School District - Seismic Valve Installation
MBS Engineering worked with Campbell Union School District to install a new seismic valve at Rolling Hills Middle School in Campbell, CA. This replacement became especially important after the existing seismic valve was broken at the flange while some pipe work was being done by another contractor. MBS worked to mobilize out to the site quickly and complete the work to minimize the downtime for the school’s gas system.
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Our ProcessMBS Engineering utilizes utility-grade leak detection equipment manufactured by Heath Consultants USA -- the same equipment used by your local utility companies. MBS employs fully trained and certified technicians to perform all Gas Leak Surveys. Some other aspects of our gas leak detection service include:
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Experts at Detecting and Repairing leaksOur team is focused on innovation and ensures our field technicians have the latest technology to produce the most reliable surveys possible. We have an excellent track record with hospitals, universities, public schools, commercial clients and California utilities. With our extensive experience, professional field officers and state-of-the-art equipment, we're able to provide the most efficient and reliable gas leak detection possible. You can depend on our experts to help keep your gas system and your facility safe.
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