A Fun-Filled Day At The Annual Terra-Petra Summer Picnic

A Fun-Filled Day At The Annual Terra-Petra Summer Picnic

Thank you to everyone who came out to the annual Terra-Petra Summer Picnic this year.  It’s always nice to connect outside the office with friends, family, co-workers and colleagues who help make Terra-Petra successful. It was a wonderful event, and a great day to be outdoors enjoying the summer weather.

The event was held this year at Rancho Los Cerritos in Long Beach, and we couldn’t have asked for a better setting.  The day was made extra special with delicious food from Marhalls’ Bodacious BBQ and live music and entertainment supplied by Common Allies along with a fun, and competitive, few rounds of bingo.

Thank you again to everyone who was able to join us this year, and thank you for being a part of Terra-Petra’s continued growth and success.

We look forward to seeing you all at the next Terra-Petra event!

Terra-Petra Expands To Southwest With New Office In Phoenix Arizona

We are pleased to announce that Terra-Petra Environmental Engineering has opened a new office in Phoenix, Arizona – a significant milestone in our company’s growth.

The expansion will enable Terra-Petra to provide highly-specialized environmental engineering, waterproofing, and inspection services throughout the Southwest region.

Headed by Dan Valdez, Director of Field Operations, Terra-Petra will start its mobilization in the State of Arizona, Southern Nevada and New Mexico.

Terra-Petra’s consulting services include, but are not limited to, the following:

Environmental Division

Methane Mitigation

Vapor Intrusion Mitigation

Radon Mitigation

Phase I Environmental Site Assessment (ESA)

PHASE II Environmental Site Assessment (ESA)

Underground Storage Tanks

Oil Well

Waterproofing Division

Building Envelope Consulting

Forensic Waterproofing Consulting

Inspection Services

QA/QC Mitigation System Observation & Testing

QA/QC Waterproofing Building Envelope Observations

Electronic Leak Detection

Terra-Petra’s expansion represents a commitment to serving a greater need for more comprehensive environmental engineering services in the Southwest. We are optimistic about the new opportunities the Phoenix location offers and look forward to building strong relationships with clients in the area.

Terra-Petra Receives 2023 Los Angeles Award For Environmental Engineering

Terra-Petra Receives 2023 Los Angeles Award For Environmental Engineering

LOS ANGELES December 5, 2023 — Terra-Petra Environmental Engineering has been selected for the 2023 Los Angeles Award in the Environmental Engineering category by the Los Angeles Award Program.  This is the 11th year in a row that Terra-Petra has received this honor.

Each year, the Los Angeles Award Program identifies companies that we believe have achieved exceptional marketing success in their local community and business category. These are local companies that enhance the positive image of small business through service to their customers and our community. These exceptional companies help make the Los Angeles area a great place to live, work and play.

Various sources of information were gathered and analyzed to choose the winners in each category. The 2023 Los Angeles Award Program focuses on quality, not quantity. Winners are determined based on the information gathered both internally by the Los Angeles Award Program and data provided by third parties.

About Los Angeles Award Program

The Los Angeles Award Program is an annual awards program honoring the achievements and accomplishments of local businesses throughout the Los Angeles area. Recognition is given to those companies that have shown the ability to use their best practices and implemented programs to generate competitive advantages and long-term value.

The Los Angeles Award Program was established to recognize the best of local businesses in our community. Our organization works exclusively with local business owners, trade groups, professional associations and other business advertising and marketing groups. Our mission is to recognize the small business community’s contributions to the U.S. economy.

SOURCE: Los Angeles Award Program

Waterproofing Concrete: Crack Size Matters, Crack Bridging Capacity

Blindside Waterproofing: Swellable Membrane Limitations: Cracks, Voids and Poor Consolidation Matter

In concrete, there are voids and cracks that waterproofing systems must compress against to be functional. This is relevant, particularly regarding poorly consolidated substrates which is inherent to shotcrete.  Swellable membranes such as Bentonite often do not achieve the 24 lbs. of compression per square foot required to achieve watertight functionality, when installed in conjunction with shotcrete.

When it comes to saving construction costs by using shotcrete at below grade vertical conditions, in lieu of cast-in-place concrete, we advise using some of those consequential savings towards a waterproofing system that can accommodate the inconsistencies inherent with blown concrete. Even the best nozzlemen cannot guarantee that voids will not be left behind.

A High-Density Polyethylene (HDPE) membrane with taped seams, used in conjunction with a bentonite option (that has the capacity of bridging in a watertight manner the poor compaction and consolidation areas that are acceptable structurally but inherently problematic from a waterproofing standpoint), is a predictable way to get watertight performance results with shotcrete applications.

Contact Terra-Petra today for a consultation on our waterproofing consulting, testing and inspection services.

Terra-Petra Building Waterproofing crew checking for leaks.

Water Testing Results: What Do Successful Projects Have in Common?

The Terra-Petra Waterproofing Division conducted water testing in Culver City that resulted in a first-time pass.

By Barry Taheri, Terra-Petra Forensic Waterproofing Consultant

Q: What does a first-time pass in water testing demonstrate?

A: It demonstrates the team can execute the detailing and workmanship of the materials required to build a watertight assembly without having to make alterations to the detailing means, methods, or materials.  Typically, we don’t see a first-time water test pass.

We congratulate our team on their success, particularly the meticulous detailing by the applicator/subcontractor. We conducted an audit of the past 30 water tests to identify the best practices that lead to a first-time pass water test versus otherwise. Our team was surprised to find the following commonality without exception.

All mockups that resulted in a first-time pass had one thing in common. The GC, subcontractor, manufacturer representative, and waterproofing consultant were present during the mockup layering and detailing. In all other cases that did not result in a first-time water test pass, the mock-ups were done in the dark without the critical parties present.

This example demonstrates clearly that the shortcut to water tightness is to follow the process of appropriate design and materials, mocked-up in place or stand-alone, with all parties present.

Waterproofing as it Applies to Assembly and Structural Integrity

As building envelope professionals, we can’t emphasize enough how critical the waterproofing discipline works alongside a structural team during and beyond construction.

The Champlain Towers South building collapse is a disaster beyond belief. First responders continue to dig out the rubble upon publication of this article.

David Santiago/ Miami Herald via Associated Press

We acknowledge their dedication and professionalism as they work to find those loved ones who are unaccounted for.

It is so important to be able to identify adverse moisture and water-related conditions early. Such specific conditions may end up affecting the building assemblies that may result in degradation of structural capacity.

Depending on the building assembly type, the degradation could be slow (masonry assemblies) or rapid (wood assemblies). However, in both cases, unless the source of the degradation is repaired and the intrusion is mitigated, the degradation can and will lead to an eventual structural compromise that can result in a catastrophic failure.

It is very critical for building professionals to survey their buildings and mitigate/repair any attributes that may be the cause or contributing factors of building assembly degradation.

Allowing the building components to “live” in an environment that is non-standard and lends itself to degradation can place the entire building in unchartered territory that lends itself to an unknown reduction of the building’s expected lifecycles and renders the structural experimental rather than predictable.

Terra-Petra provides all consulting services for sub-slab vapor barriers consulting services for sub-slab vapor barriers, below-grade waterproofing and drainage, podium and balcony waterproofing, planter waterproofing, and drainage, exterior wall cladding and weather-resistive barriers, and roofing assemblies.

For more information or to discuss your next or current project visit: https://terra-petra.com/wp/building-envelope-consulting-los-angeles or contact Barry Taheri.

Terra-Petra’s Forensic Waterproofing Expert, Barry Taheri

Terra-Petra’s Forensic Waterproofing Expert, Barry Taheri

Terra-Petra’s Forensic Waterproofing Expert, Barry Taheri, recently presented his 17th lunch and learn program for architecture, planning, and conservation firm, Architectural Resources Group, on June 16, 2021.

ARG’s projects encompass some of the West Coast’s most iconic buildings and sites, such as the rehabilitation of the Alcatraz Quartermaster Warehouse in San Francisco and renovation of the Trust Building in Downtown Los Angeles.

Barry presented the material remotely (we hope to be “in person – with lunch” the next go-around!), and it was well-received! During the Q&A, Barry was asked about his experience with historic buildings. He described a current consultation at the Egyptian Theater in Los Angeles (reopening 2022), and a completed consultation at the iconic Hotel Cecil in downtown Los Angeles. Barry spoke about the patience and creativity needed to deal with the limitations presented by these historical restorations. He was also asked to forward the seminar’s section on stucco tests, to an ARG conservator, as the material was evidently relevant to the work they perform.

Special thanks to Marcos Gonzalez-Bode for organizing the event.

Contact Terra-Petra for more information on how to schedule a Lunch and Learn Program for your organization.

About Terra-Petra Forensic Waterproofing Services

Due to the emerging demands of energy, sustainability, and functionality of both residential and commercial structures, coupled with a high rate of water infiltration litigation, building science, codes, and requirements are rapidly evolving requiring builders and architects to retain expert guidance. We use our knowledge and experience from years of legal and forensic cases to bring expertise to your project and introduce a balanced and systematic approach to the entire water management system and a proper integration of all components.

Terra-Petra Waterproofing Division

The Terra-Petra Waterproofing Division strives to provide a holistic approach to Building Envelope Consulting with a focus on “making our clients’ lives easier.” We achieve this goal by responding to our clients’ needs in a timely manner and serving as their single point of contact for any services they need. This approach has allowed the Terra-Petra Waterproofing Division a very steady and organic growth from the inception of the company in 2002.

Our clients have come back to Terra-Petra, again and again, with new needs asking if we can provide more and more services than for their previous project. Fortunately for us, our customer intimacy value discipline has allowed us to continually tailor and shape our service offerings to fit the increasingly defined definition of our customers’ needs. With offices in most major metropolitan areas across the country, Terra-Petra’s Waterproofing Division has successfully worked on a variety of building waterproofing projects around the United States in a variety of climates. We can respond in a moment’s notice to any client request.

Terra-Petra Waterproofing – Building Envelope Consulting Los Angeles

Terra-Petra is currently providing building envelope weatherproofing consulting services to a multinational asset management and development firm at their development in Los Angeles CA.

The project will consist of the construction of a new 6-story, 30,274 SF multifamily apartment building consisting of five levels of type III-A over one level of Type I-A. The building footprint is approximately 7,000 SF.

Building Envelope Consulting – Los Angeles, CA

Terra-Petra is currently providing building envelope weatherproofing consulting services to a multinational asset management and development firm at their development in Los Angeles CA.

The project will consist of the construction of a new 7-story, 60-unit residential building with a common area at the roof. It will include a subterranean parking level with a semi-automated parking system with a parking pit. The building footprint is approximately 11,900 SF.

Terra-Petra will provide all consulting services for sub-slab vapor barriers, below grade
waterproofing and drainage, podium and balcony waterproofing, planter waterproofing and drainage, exterior wall cladding and weather-resistive barriers and roofing assemblies.

Terra-Petra is Proudly Recognized as an SBE – Small Business Enterprise

Terra-Petra is Proudly Recognized as an SBE – Small Business Enterprise

The SBE is a company-level diversity certification. Non-industry specific it is issued by a local or state government. Terra-Petra’s SBE certification is issued by the State of California.

Eligibility for certification as a Small Business Enterprise varies depending on the issuer. Requirements include the number of employees, the length of time the company has been in business and the net worth of the company’s owner.

In order for a small business to be eligible for certification, the small business must meet the following requirements in California:

  • Be independently owned and operated
  • Not dominant in the field of operation
  • The principal office must be located in California
  • Owners (officers, if a corporation) domiciled in California
  • A business with 100 or fewer employees; an average annual gross receipt of $15 million or less, over the last three tax years.
    • A small business will automatically be designated as a microbusiness, if gross annual receipts are less than $3,500,000; or the small business is a manufacturer with 25 or fewer employees.

Upon meeting the Small Business Certification eligibility requirements, certified small business (SBs) and microbusinesses (MBs) are entitled to the following benefits:

  • A five percent (5%) bid preference on applicable State solicitations.
  • Certified small business/microbusinesses are eligible for the State’s Small Business Participation Program. This program sets a goal for the use of small businesses in at least 25% of the State’s overall annual contract dollars.
  • Under the Prompt Payment Act, the State must pay a certified SB / MB higher interest penalty for late payment of an undisputed invoice. Prompt payment penalties for construction firms are addressed separately under Public Contract Code, Section 10261.5.
  • State agencies may use a streamlined process, known as the SB/DVBE Option, by contracting directly with a California certified small business/microbusiness for goods, services, information technology and Public Works projects. The solicitation must be valued at more than $5,000 and the State agency must obtain price quotes from at least two California certified small business/microbusiness.
  • The DGS-PD charges state and local agencies an administrative fee, when contracting with a California Multiple Award Schedules (CMAS) vendor. As an incentive, the fee is waived, if the CMAS vendor is a certified small business/microbusiness.

Terra-Petra maintains a working knowledge of numerous environmental and soil gas mitigation matters. Our staff includes Methane Consultants, Radon Mitigation Engineers, Construction Managers, Civil Engineers, Registered Environmental Assessors, Registered Geologist/Certified Engineering Geologist, Petroleum Geologists and Petroleum Engineers. This experience gives Terra-Petra the ability to find compromise solutions for any environmental concern that may arise.

Terra-Petra offers on-call consulting services in the City of Los Angeles. We are available to do the work or make official visits at any time as needed.

Contact us today at 1.888.540.5703 or info@terra-petra.com.

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