CalGeo e.Geo Newsletter

June 2021

Welcome to the new e.Geo newsletter! All the great content and information you love in a new refreshed design.

We hope you had a great Memorial Day long weekend and are looking forward to summer.


Summer for CalGeo means starting our new fiscal year, welcoming new volunteers and committee members and getting to work on plans for a new year filled with golf tournaments, more educational courses and of course, starting to plan our next in-person Annual Conference.


We have a few events on the calendar for June as we finish up the Write Right course and host our Regional Meeting on the Chase Center Development. All the info is available below on our calendar.

June Regional Meeting: Chase Center Development


Join us on Thursday June 10th at 12pm for a look at one of California's latest construction mega-projects. The Chase Center Development in San Francisco, CA won an Outstanding Project Award last year for the geotechnical design by Langan Engineering & Environmental Services.


Lets learn a little more about this project as we join Lori Simpson, Senior Principal and Serena Jang, Senior Associate at Langan.


The webinar is free of charge and registration is through GoToWebinar.

More details on CalGeo's calendar page HERE >>


John Bachner's Write Right Seminar: Still time to join!

Learn the writing fundamentals: understanding the “five C’s” of effective communication, sentence structures, key elements of the parts of speech, obtaining full information, and, time permitting, issues related to e-mails and preparing lists.

This seminar is essential to engineers regardless of their experience level! Loss prevention to reduce liability and professional development all in one.

NorCal Golf Tournament Registration Open!


We are excitedly planning our first foray into in-person events for the fall. Time to warm up your swing and mark you calendars for our NorCal tournament on Friday October 8th @ Poppy Hills Golf Course, Pebble Beach (Monterey). 


We have secured a block of rooms at both the Carmel Mission Inn and the Hyatt Regency Monterey if you wish to stay the night or even for the weekend. We are planning a post-golf reception and awards happy hour. Any spouses or members not golfing are of course, welcome to join!


Sponsorships available! Click the link for more information below to view available sponsorships.


Help support our students: This is a fundraiser for CalGeo's student chapters and scholarships. Consider bringing your clients, friends, golf-buddies and co-workers. Everyone is welcome regardless of your membership with CalGeo. Let's make this the biggest golf tournament  yet!



Thursday October 14th - Torrey Pines South Course (La Jolla). Save the date for now, more details coming soon!



Project Award Winner Spotlight: ENGEO wins Public Medium Budget Category

Claire Lilienthal Elementary School, San Francisco, CA

The San Francisco Unified School District elected to perform a voluntary seismic retrofit at Claire Lilienthal Elementary School and engaged ENGEO to perform a geologic hazard assessment, prepare construction drawings and specification for strengthening the soil below existing and new footings and provide quality control and quality assurance (Qa/Qc) during construction. Ground improvement comprising compaction and permeation grouting were selected to limit differential settlement due to liquefaction under footings to 0.5 inches over a span of 30 feet; other project benefits included optimized construction costs and performance of the retrofit in a period of 9 months. The project schedule was rapidly accelerated as a result of the state mandated COVID-19 lock-down, transitioning from the field verification test section directly into production work. The ground improvement achieved the project performance criteria, reduced construction costs by 50% compared to micropiles and accelerated project completion to less than 5 months. The ground improvement work resulted in an increased level of safety for the students, teachers, and faculty while maintaining the historic and cultural significance of the building.


In December of 2017, ENGEO published the geologic hazard assessment report for the proposed seismic retrofit. The site is located in a mapped liquefaction hazard zone as shown in, Exhibit 5. In our analysis, we identified that the sandy soil at the site was susceptible to seismically induced liquefaction settlement. In addition, the site is underlain by compressible Young Bay Mud deposits that are susceptible to consolidation settlement under new building loads and/or new civil fill placed at the site.


ASCE 41-13 was used as the seismic design criteria for the retrofit design. For the Basic Safety Earthquake Level 1E (BSE-1E), we estimated up to 8 inches of total settlement due to liquefaction with up to 4 inches of differential settlement over a span of 30 feet could occur without mitigation. The options developed for the structural retrofit include supporting existing and new footings on micropiles embedded in the dense sand layer below the Young Bay Mud deposits, and supporting new and existing footings on soil improved with a combination of compaction and permeation grouting.


We performed a supplemental geotechnical study to develop soil densification performance criteria and prepare construction drawings and specifications for compaction and permeation grouting.


Throughout production, casing advancement for both compaction and permeation grouting encountered obstructions. Obstructions were typically caused by either debris in the loose sandy fill or undocumented work from the 1973 seismic retrofit. Adjustments to approved submittal injection geometry were required where injection casings achieved refusal. The field adjustments required coordination between the contractor and ENGEO inspectors to recommend geometries that were both constructional and provided adequate coverage of the grouting work performed.


With an exemplary effort from the entire project team, the ground improvement work was completed without delay. Production work totaled approximately 7,300 cubic feet of compaction grout and 120,000 gallons of permeation grout injected. ENGEO provided continuous inspection and construction consultation, helping to ensure the improvement followed the project plans and specifications for the various field conditions encountered. The results of the findings and recommendations from the field verification test section and production work were approved by CGS. Following the completion of the grouting, the structural improvements for the seismic retrofit


CalGeo Job Board

It seems like everyone in our industry is hiring right now. Looking for a change or know someone in the market for a new position? Check out our job board for all the newest postings.

FEATURED Mid Level And Senior Level Geotechnical Engineer 
Giles Engineering Associates, Inc. - Orange, CA 
Posted: May 25, 2021 
Application Deadline: N/A 
FEATURED Senior Soils Technician 
LGC Geotechnical, Inc. - San Clemente, CA 
Posted: May 20, 2021 
Application Deadline: Jul 31, 2021 
FEATURED Staff Geologist 
LGC Geotechnical, Inc - San Clemente, CA 
Posted: May 20, 2021 
Application Deadline: Jul 31, 2021 
FEATURED Staff Engineer 
LGC Geotechnical - San Clemente, CA 
Posted: May 20, 2021 
Application Deadline: May 31, 2021 
  FEATURED CAD Operator 
Berlogar Stevens & Associates - Pleasanton, CA 
Posted: May 20, 2021 
Salary: $30.00 - $40.00 Hourly 
Application Deadline: N/A 

Welcome New Members! 

Practicing for over 25 years, Hultgren – Tillis Engineers provides geotechnical engineering services for industrial, municipal, commercial and civil works projects. Its projects include new and upgraded levees, marine structures, slope stabilization for roads and drainage facilities, industrial process equipment and storage tanks, pipelines, buildings, marsh restoration, and miscellaneous foundation engineering projects.

New Individual Member: Timothy Cramer, Geosyntec


Upcoming Events: The e.Calendar at a Glance 

May 18, 25, June 1, 8, 2021: Four-part web series, Write Right Web Series w/John Bachner


June 10, 2021 @ 12pm: June Regional Meeting on Chase Center Development. REGISTER NOW!


October 8, 2021: NorCal Golf Tournament - Poppy Hills - Registration & sponsorship now available.


Contact Info:

California Geotechnical Engineers' Association (CalGeo)

1048 Irvine Ave. #994, Newport Beach, CA 92660

Tel: 949-391-2436

[email protected]

Connect with us: 

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CalGeo  1048 Irvine Ave, #994, Newport Beach, California 92660, United States  949-391-2436
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