geotechnical services in the Antelope Valley, Acton, Agua Dulce, Victorville, Hesperia, California City, Mojave and Rosamond areas.
 
 
 
Percolation testing
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Services include:

  • Geotechnical Reports
  • Percolation Reports
  • Septic System Design
  • Compaction Testing/Grading Inspection
  • Material Testing
  • Deputy Inspection
  • Phase 1-4 Environmental Studies

Geotechnical Reports

Geotechnical Reports that are required for new construction consist of soil borings or trenches, soil sampling, laboratory testing, data analysis and report preparation. The report will provide recommendations for your specific site and proposed construction relative to collapsible soil (settlement), expansive soils, soil classification, soil strength data (i.e. bearing values for foundation design) and chemical analysis of the soil (i.e. sulfates, chlorides, which can react and deteriorate concrete).

Every structure needs a good foundation, but it also needs a good foundation support system. It is important to contact Bruin GSI, in most cases, before you purchase your lot, as special foundation design and/or grading recommendations will affect the cost analysis of your project.

Percolation Reports/Septic System Design

A percolation report is required for constructing an occupancy (residential or commercial) that will not be connected to sewer service. In these cases, a private sewage disposal system is necessary. These reports consist of trenching or drilling pits or borings and determining the percolation rate of the soil by measuring the amount of water that percolates (soaks) in a given amount of time. Once the percolation rate is obtained, a septic system may be designed. Designing a septic system takes experience and knowledge of the governing agency requirements and Uniform Plumbing Code.

Leach line systems are the most economical and are typically designed if the development allows. Leach lines are relatively shallow (less than 15’) horizontal perforated pipes with gravel, 60 to 100 feet in length. The size and length depends on the percolation rate and structure plumbing fixtures. In some cases multiple leach lines may be necessary.

If you parcel is steep, small or in an area that does not percolate well, seepage pits may be required. Seepage pits are vertical borings, 4-6 feet in diameter, line with perforated concrete liners, 25 to 50 feet deep, also depending on the percolation rate and structure plumbing fixtures. In some cases, multiple pits and a pretreatment system to prevent groundwater contamination may be required by the governing agency.

Due to the restrictions of designing a septic system, it is important to contact Bruin GSI, in most cases, before you purchase the property.

COMPACTION TESTING/GRADING INSPECTION

Compaction testing and grading inspection is required to verify compliance with the governing agency building codes and compliance with the recommendations of the geotechnical report. Bruin GSI provides experienced soil engineering technicians at your site to observe, test and report on the site proceedings and results of the tests during rough grading. The tests are performed with a nuclear gage that measures soil density and moisture content. The daily report indicates whether or not the rough grading is being performed in compliance with the geotechnical recommendations. Subsequent to successful completion of the rough grading, a Final Compaction Report will be prepared, documenting all tests results and a statement that all rough grading was performed in compliance with the building code and geotechnical report recommendations. A certification of the rough grading will also be completed. All testing is performed under direct supervision of our Principal Engineer, Dennis J. Sloan, as indicated with his stamp and signature on the certification document.

MATERIAL TESTING

Bruin GSI can also provide material testing services for you project. Concrete, asphalt-concrete, aggregate or road base materials can be tested to verify compliance with the project specifications.

DEPUTY INSPECTION

Licensed Deputy Inspectors will provide the necessary inspections and documentation to verify compliance with the project plans and specifications. Inspectors are licensed in their area of expertise, such as structural concrete, masonry, post-tension or pre-stressed concrete, structural steel and welding to name a few.

PHASE1-4 ENVIRONMENTAL REPORTS

Phase 1-4 environmental reports are prepared by our Registered Environmental Assessor. The phase 1 report includes a data base research, site reconnaissance and review of historical aerial photographs to detect the possibility of hazardous materials at your site and adjacent properties. Previous uses such as gas stations, farming equipment and the kind could have caused hazardous waste contamination. If hazardous materials or evidence of hazardous materials are detected, a Phase 2 report would be necessary. If the materials are so extensive as to require cleanup, Phase 3 and 4 reports would be warranted.

Ii is important to contact Bruin GSI to perform the Phase 1 report prior to purchasing the property. If you purchase property that contains hazardous materials cleanup could be expensive and cause delays in development. If a financial lending institution is involved in your purchase, a Phase 1 report will more than likely be required.


   
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