All phases of sub-surface soils and foundation exploration, including:
Water Observation Wells
Asphalt / Concrete Coring
Soil Bearing Reports
Geotechnical Evaluation Reports
COMMERCIAL & RESIDENTIAL
SLACKE TEST BORING
Post Office Box 64
Kings Park, NY 11754
Founded in 1963, the operations and supervision of the firm is under the direct supervision of its owner...
LORETTA A. LUNING
I started typing Field reports in 1976… I still type Field reports!
My geotechnical knowledge and skills learned from over 40 years of drilling and soil sampling analyses are applied to each project.
This is a team which operates on the principle that expertise, honesty, and efficiency, at a reasonable cost is the key to success, and a satisfied repeat-customer
DIRECTOR OF FIELD OPERATIONS
"This Web Site Is Dedicated To The Memory Of
Felix & Sally Slacke Who Began This Legacy."
Borings and soil sampling are performed utilizing a geoprobe drill rig, or other industry standard, according to ASTM D1586 Penetration Test and Split Barrel Sampling of Soils. Following ASTM D2488 Recommended Practice for Description of Soils and Uniform Soil Classifications, a report is generated which illustrates measured groundwater level, if encountered; soil profile and soils description with blow counts. ‘N’ value, standard penetration resistance, is an indicator of safe bearing capacity of the soil.
Percolation Test, commonly referred to as Perc Test, will determine leaching rates and permeability of soils. This test can be performed at upper soil strata or at deeper strata, following completion of a test boring, using placed casing.
Perc Tests are useful in design of sanitary waste systems, cesspools or septic tank installation; also, for the management of stormwater run-off which is required by most local code to be retained on private property using drywells and/or French drains.
Open pit inspection by the Suffolk County Health Department or Nassau County Health Department is sometimes required. Our ---------------------- Backhoe is available.
The unit can also be employed to expose existing foundations for examination by Engineers and Contractors to design extensions, load increases, etc.
GROUNDWATER MONITORING WELL:
If groundwater level is critical to the design and installation of sub-surface structures, observation wells can be installed. PVC monitoring wells constructed of Well Screen and Riser of varying diameters and lengths can be monitored by our staff or client staff over a period of time.
EXCAVATION AND LAND CLEARING:
In-house equipment to clear wooded sites to access boring program; or generalized land clearing prior to construction.
GEOTECHNICAL REVIEW AND ENGINEERING RECOMMENDATION:
Through our association with J.R. Holzmacher, P.E., LLC, a fully faceted Engineering Firm located in Ronkonkoma, our boring reports can be further enhanced by a comprehensive review as prepared by Michael Simon, P.E.. The report routinely evaluates the soil boring and assigns a soil bearing value to each split spoon sample. Foundation recommendation are offered and sanitary concerns are addressed. The firm is readily available to take any project from conception to completion.
HELICAL PILE INSTALLATION
We are expanding to offer competitive bidding on the installation of Danbro helical piles. Angelo DeLiso is certified by Chance. Our brand new, state of the art, Toro Dingo with on-board computer will facilitate the helical pile installation and reporting process.
FREQUENTLY ASKED QUESTIONS
WHAT IS A SOIL TEST?
A Soil Test will show properties of existing soils and ground water and how they relate to design and construction. Soil Tests can be for geotechnical (building and drainage) or environmental (contamination and remediation).
WHY DO I NEED A SOIL TEST?
A Soil Test, known in the industry as a soil boring, is used by Architects, Engineers and Contractors to design foundations and sanitary systems, for residential and commercial property.
WHAT IS IT GOING TO TELL ME?
First Look is the groundwater level. How deep can my foundation be placed and how deep can my cesspool or leaching field be set before we are in groundwater.
Second Look is the soil profile. Are the soils made up of sand and gravel, clays or silts or organic material known as Peat. Clays and Silts will affect how well the soils will drain (i.e. percolation) and the stability of a foundation since these materials will wash out when exposed to water. Sand and Gravel combinations offer maximum leaching and maximum density in the right combination.
Third Look is the “blow counts”. This relates to the number of times the sample spoon is hit with an industry standard 140 pound hammer to advance the spoon within the bore hole. The higher the blow counts, the greater the density.
WHO REQUIRES THIS TEST?
Architects and Engineers when planning a building or a residence require this information to determine the design of the foundation. Is a standard poured concrete footing appropriate, or will we need an oversized footing or pile supported footing. They can relate the load of the structure to the available bearing values of the soil. With respect to Sanitary Design, do we need one cesspool or five cesspools or a septic tank and leaching fields.
State, County and Local Towns differ on their requirements. It is best to contact the Building Department of your Town for this information.
HOW MANY BORINGS AND HOW DEEP?
The depth and number of borings will vary on the proposed site development. The bigger the footprint of the building, the more test borings may be required. Small lots require less borings. Our firm is very client oriented as to not “over-drill” a site. Residential new construction is usually 2 – 4 borings, commercial development can exceed 25 borings depending on acreage to be developed.
Depth of boring varies by location. New York City requires a minimum of 25.0 feet in depth providing the boring encounters suitable bearing soils, or the boring is extended. Depth of borings can range from 20.0 feet to 100.0 feet depending on the information required. Again, most residential borings range from 20.0 to 30.0 feet.
WILL THE TEST DESTROY MY PROPERTY? HOW MUCH OF A MESS? HOW LONG WILL IT TAKE?
The geoprobe rig is remote controlled from a transport vehicle. It weighs in the area of 6,000 pounds. You can expect ruts or tracks across grass areas. We are equipped to use plywood to limit damage. The drilling operation creates a 4 to 6 inch opening which is closed and packed at the end of the boring. It will not create a hazard.
A typical boring can be completed to a depth of 25.0 feet within two hours.