Preliminary Soils Report

WAC Geotechnical Inc


Geotechnical Engineering

Serving all of Southern California

(800) 564-7372



Percolation Testing - also commonly referred to as a Perc Test, Perk test, Percolation Investigation, Feasibility Test, Septic System Test, OWTS Test, etc. Perk Testing is performed to determine the feasibility of using an onsite wastewater treatment system on the lot or property in question. They are most often performed for either a Leach Line or Seepage Pit application, however; are also performed for Leach Beds, Horizontal Seepage Pits, Advanced Treatment unit approval and Mound Systems. Percolation tests are required and performed for numerous reasons such as:

  •    Purchase or sale of vacant land
  •    Additions to existing homes
  •    Second unit permits
  •    Preparation of building permits
  •    Commercial and Residential Construction
  •    Repair or replacement septic systems

Preliminary Soils Reports - Site and laboratory analysis of foundation soils. All testing complies to the current codes. Typically direct shear, expansion, max density and a corrosion series are run on each residential site. Comments on liquefaction and seismic hazards are provided. R-values for pavement construction are provided where needed. Wac Geotechnical, Inc. has an in house laboratory and sub-contracts with other laboratories in order to provide the quickest possible turnaround and most economical price.

WQMP - inverse bore method with porchet conversions, Double-ring infiltrometer, BMP, infiltration testing - in keeping with the California Water Quality Management Plan we can engineer and design retention basins, storm chambers, and dry-well retention systems.

Advanced Treatment Units - Firms Such as Advantex, Bio-Microbics, Jet, Norweco to name a few, manufacture advanced treatment units which involve a primary treatment tank sometimes larger in size than required by code and contain special filtering media. The larger size and filtering media provides increased bacterial action and significantly reduced nitrate levels therefore reducing the negative impact on the environment. Our office can provide consulting, percolation testing, design and installation of these types of septic systems.

Environmental Engineering Services - including but not limited to; environmental site assessment, storm water permitting, NPDES requirements, double ring infiltrometer testing, soil and groundwater sampling.

Additional Services:

  • Double Ring Infiltrometer Testing
  • Compaction Testing
  • Stormwater Infiltration Testing
  • Groundwater and Soil Sampling
  • Grading Supervision
  • Environmental Consulting
  • Grading Plan Review and Design
  • Foundation Soil Analysis Reports
  • Mound System Design and Installation

Serving Central and Southern California including but not limited to: Riverside County - Perris, Nuevo, Temecula, Murrieta, Winchester, San Jacinto, Riverside, Lake Mathews, Mira Loma, Colton, Moreno Valley, Norco, Indio, Palm Desert, Palm Springs, Corona, Cherry Valley, Lake Elsinore, Hemet, Homeland, Romoland, Sage, Twin Pines, Idlewild, Beaumont, Banning, Menifee, Sun City, Desert Hot Springs, Desert Cities and more. San Bernardino County - San Bernardino, Big Bear, Fontana, Redlands, Ontario, Victorville, Highland, Apple Valley, Running Springs, Yucaipa, Colton, Crestline, Hesperia, Upland, Rancho Cucamonga, Yucca Valley and more. Also serving Los Angeles County, Orange County, San Luis Obispo County, Kern County, Ventura County, Santa Barbara County, Imperial County and San Diego County. (LA County)

Copyright © 2014 WAC Geotechnical, Inc.