AM/PAC and Associates, Inc.

Geotechnical, Environmental and Foundation Engineering, Design and Construction

                                                  Services and Information
Percolation Testing or sometimes referred to as a Perc Test, Perk test, Percolation Investigation, Feasibility Test, Septic System Test, etc. is performed to determine the feasibility of using an on site, sub-surface sewage disposal system on the lot or parcel in question. Perc Tests are generally performed for either a Leach Line or Seepage Pit application but are also performed for Advanced Treatment approval and Mound Systems. For lots requiring septic, a passing Percolation test is required by the lender to close escrow on a real estate transaction. Percolation tests (Perk Tests) are required and performed for several reasons such as:

  • Purchase or sale of vacant land
  • Preparation of building permits
  • Additions to existing homes
  • Second unit permits
  • Commercial and Residential Construction
  • Repair or replacement septic systems
Perc Tests are performed by digging one or more percolation test holes and logging how fast water poured into these perc test holes dissipates thereby simulating an onsite wastewater treatment system. An exploratory bore hole (usually 15' - 50' deep) is also part of a perc test and is used to access the possibility of groundwater which could cause a failed perk test. The Results from the percolation test will read in minutes per inch and will establish how big or small your septic system needs to be.

Call, email or Request A Proposal for a percolation test in Riverside, Temecula, San Diego, San Bernardino or Neighboring city.

Advanced Treatment Units  Such as Jet, Advantex, Norweco, etc. proprietary names, 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. A Percolation Test is required to establish if weather or not an advanced treatment system is right for your property.

Septic System Design: Included with our percolation test reports, with decades of experience designing and installing septic systems we are the clear choice when you need a septic system designed accurately and to code

Septic System Installation: After a passing percolation test and septic system design comes the septic system installation. Decades of experience constructing and designing septic systems have paid off and we are able to offer competitive prices and unparalleled quality on septic systems we install. Request a quote today.

Septic System Certification: Often required if your having a perk test performed for a second unit or replacement system; our experienced staff can locate, assess, pump and certify your septic system per the Health Department's guidelines.

WQMP: BMP, double-ring infiltrometer, 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.

Conventional Septic Systems: include a primary treatment tank (commonly referred to as a Septic Tank) and an effluent dispersal method, usually either Leach Lines or Seepage Pits. Percolation Tests are used for sizing and designing septic systems

Site Plan / Plot Plan Design: Site Plans prepared by our office are accurate and professional. Our Site Plans are made using state of the art CAD software. Request a quote online or call.

Septic Tank is a primary treatment tank that is rated by the number of gallons of sewage/effluent it can hold. The tanks have a baffle inside that separates the interior into two compartments. The inlet side is 2/3 capacity and stores the solid wastes from the structure it serves. The remaining 1/3 is the outlet side compartment. This is where the liquid called effluent is stored until, assisted by gravity flow, it moves on to the dispersal method.
    All septic systems require a Septic Tank. The solids are broken down and digested by aerobic and anaerobic bacteria. It is very important to have the Septic Tank pumped, cleaned and inspected at least every five years.

Leach Lines are horizontal trenches around three to six feet deep with either plastic chambers or crushed rock under perforated pipe. The soil at the sides and bottom of the trenches absorbs the effluent liquid. Approximately 45% of the effluent evaporates at the surface.
    It is not permissible to park over leach lines as this will severely inhibit evaporation of the effluent. Driving or parking of vehicles or the pasturing of hoofed animals is also not permissible over leach lines as this type of action compacts the soil and inhibits evaporation.
Leach Lines are recommended for larger lots that have sufficient usable area available for a leach field.

Seepage Pits are commonly 5-6' O.D. vertical, round Pits, lined with concrete block or precast cast concrete liners. The blocks have voids and liners have weep holes that allow the effluent to be absorbed by the soil sidewall and bottom of the seepage pit. Seepage Pits require less surface area that leach lines. Seepage Pits are recommended for use in areas with no shallow groundwater or bedrock. Seepage Pits may be paved over, driven and parked on.

Performing percolation testing and other geotechnical engineering services in the following areas : 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, Ventura County, Santa Barbara County, Imperial County and San Diego County. (LA County)

Call for a perk Quote in your area!

(951) 354-6500