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NORTHGATE HOLDING’S PROCESS AND PROPRIETARY MATERIALS SOLIDIFY AND STABILIZE
NON-HAZARDOUS SLUDGE, SOFT AND/OR WET WASTES, AND LIQUID WASTES ECONOMICALLY;
IMPROVE THE STRUCTURAL STABILITY OF THE SOLIDIFIED WASTE; AND LIMIT THE LIQUID
RELEASE OF THE SOLIDIFIED WASTES UNDER PRESSURES DEVELOPED BY BURIAL IN A
LANDFILL.




OUR PROCESS




Northgate Holdings, LLC utilizes a patent pending process of solidification and
stabilization of non-hazardous sludge, soft and/or wet wastes, and liquid wastes
utilizing bulking agents (such as auto shedder residue), pozzolanic agents, and
proprietary materials.  

 

Our process consists of screening of bulking agents; mechanical conveyance of
the screened bulking agents; the mechanical conveyance of pozzolanic agents and
proprietary materials to a pug mill for mechanical mixing; the pumping of liquid
wastes located in storage tanks to the pug mill; and the mechanical conveyance
of sludge, soft and/or wet wastes to the pug mill; and the mechanical conveyance
of solidified waste from the pug mill.  



The principal constituents of Northgate Holding’s solidification and
stabilization materials consist of a bulking agent, a pozzolanic agent, and
Northgate Holding’s proprietary material.  Bulking materials are mechanically
screened to remove oversized materials that are not beneficial to the waste
bulking process.  Pozzolanic materials are utilized to act as a siliceous
pozzolan and provide structural stability to the solidified material.  Northgate
Holding’s proprietary material is formulated for each specific waste stream to
assist in the waste stabilization process as needed.  Bulking agents, pozzolanic
material, and propriety material are added at varying proportions depending on
the characteristics of the waste to be solidified.  Mix designs are developed
and processing equipment systems are designed for specific waste streams,
available bulking agents, and available pozzolanic materials for each project
location.  Waste stabilization mix designs are developed to limit liquid release
from the solidified material under pressures developed by burial in a landfill. 



Northgate Holding’s process and proprietary materials solidify and stabilize
non-hazardous sludge, soft and/or wet wastes, and liquid wastes economically;
improve the structural stability of the solidified waste; and limit the liquid
release of the solidified waste.

SERVICES


QUALITY ASSURANCE & PERFORMANCE MONITORING SERVICES



Northgate Holding’s provides on-site laboratory testing services to ensure all
solidification and stabilization goals are met.  On-site testing is utilized to
finalize solidification mix designs and mix ratios for individual waste streams,
bulking agents, and pozzolanic materials.  Once mix designs are determined,
on-site testing is performed at regular intervals to confirm solidification and
stabilization goals are being met and allow for on-site adjustments to mix
ratios as needed.  Liquid release testing can be performed to simulate landfill
burial pressures up to 100 PSI.  Mix designs can be adjusted to meet every
landfill’s liquid release goals at varying burial pressures. Pocket penetrometer
readings can be obtained from the liquid release procedure pressurized cylinder
to determine compressive strength of the solidified material under simulated
landfill pressures.

 

Testing services typically performed on the solidified and stabilized waste
on-site include:

 

 * Paint Filter Liquids Test (EPA 9095B).

 * Liquids Release Test (EPA 9096) modified.

 * Compressive Strength Utilizing a Pocket Penetrometer.

 

Northgate Holdings has modified the EPA Liquids Release Test Procedure to allow
for the precise measurement of the volume of liquid released by adding a
discharge port and measuring device to the pressure application device.  This
allows for the on-site determination of the percentage of liquid release from
solidified waste at varying simulated pressure conditions.  

 

Standard laboratory testing for compressive strength (ASTM D2166-Unconfined
Compressive Strength of Cohesive Soil and ASTM D2580-Unconsolidated-Undrained
Triaxial Compressive Test on Cohesive Soil) are designed for use on cohesive
soils (clay type materials).  Because the solidified and stabilized waste to be
tested is not a cohesive soil, these standard laboratory tests can not be
affectively performed on most solidified and stabilized waste material.  To
determine the compressive strength of the solidified and stabilized waste under
simulated landfill conditions, a Pocket Penetrometer is utilized in conjunction
with the Liquids Release Test Procedure.  Following completion of the Liquids
Release Test, the pressure application device is dismantled and a Pocket
Penetrometer is utilized to test the compressive strength of the waste sample
contained in the pressure application device.

QUALITY ASSURANCE


CLIENTS



CLIENTS


CONTACT




CORPORATE OFFICE

1135 Butler Avenue

New Castle, PA 16101



scott@northgateholdingsllc.com

Tel: 724-651-2972

CONTACT


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