What is Construction Dewatering Treatment?

“Dewatering” is a term typically used to describe the process of extraction and removal of groundwater or surface water from a construction site. Typically performed by dewatering contractors for a project site, the process of dewatering plays an important role in many Construction projects that involve excavation below the static groundwater level for construction of sub-surface parking structures, bridge caisson/piers, elevator shafts, ect. This process consists of groundwater extraction at the site with the installation of dewatering wells around the perimeter of the site by “drawing down” the groundwater level until a steady, dry state of the soil is reached allowing excavation and construction site work activities to progress.

 Dewatering at a site often involves the use of pumps. The groundwater that is recovered from a dewatering project site is often contaminated with various contaminants of concern and requires treatment of the contaminated groundwater for temporary or long-term construction water treatment systems prior to discharge into the storm drain.

 With over 20 years experience in construction dewatering treatment, Pure Effect is the top industry leader you can always count on to meet all of your temporary or long-term construction dewatering treatment needs for your project site.

Here at Pure Effect, we believe in providing you with the best solutions to ensure that your dewatering challenges are met no matter how big or small your Construction project site may be.

Contact us today for more information on Construction Dewatering Treatment Systems at 714-639-PURE

Pure Effect’s SVES (Soil Vapor Extraction System) Rental Packages

SVES (Soil Vapor Extraction System) Package Rentals

sve systems, VOC, soil vapor extraction, SVE systems

Pure Effect, Inc. Soil Vapor Extraction System

 Pure Effect, Inc. can provide you with essential services to help solve your most challenging soil remediation projects. Soil vapor extraction remediation systems (SVES) rental is often required to reduce concentration of volatile contaminants typically found in petroleum products adsorbed to soil in the unsaturated (vadose) zone and has to be completed in phases. In this SVES (Soil Vapor Extraction Systems) , a vacuum blower is applied through the wells near the source of soil contamination that needs to undergo proper extraction and remediation. Vapor phase concentration, vapor extraction systems (VES) rate and vacuum data are important factors to consider that Pure Effect, Inc. carefully analyzes and reviews prior to designing and selecting the best VES to meet your soil remediation project goals and objectives.

SVES can be mounted on skids and open trailers which Pure Effect can provide based on what works best for your project needs. Our diverse and complete package offering of trailer and skid-mounted SVES systems are designed to effectively and efficiently apply a vacuum to a well in order to remove chlorinated solvents or petroleum contaminated vapors at your project site. Our complete package we offer include soil vapor extraction (SVE), VES, air sparging, groundwater pump and treat and combinations of soil vapor and water treatment. Our SVE vacuum systems are capable of extracting volumes ranging from 50 cubic feet per minute (CFM) blowers to 1000 CFM blowers. Depending on what your project remediation needs and phase may be whether you need 250 CFM blower or 500 CFM blower, Pure Effect will provide it for you. All of our SVE systems are available for rental or purchase.

 Pure Effect’s SVE Package includes:

  • Vacuum Blowers and Motors
  • Regenerative Blowers
  • Liquid Ring Blowers
  • Water Knockout Pots
  • Flow Meters
  • Air Dilution Valves
  • Vacuum Gauges
  • Control Panels
  • Heat Exchanger
  • Variable Frequency Drives
  • Telemetry
  • Sound Enclosure

Contact Pure Effect today for assistance with your Soil Remediation Projectat: 714-639-PURE

Let Pure Effect, Inc. Help With All Your NPDES Permitting Needs!

 

Dewatering Treatment System

Dewatering Treatment System

Before a construction site can discharge groundwater into the storm drain a NPDES (National Pollutant Discharge Elimination System) Permit must be obtained from the California Regional Water Quality Control Board. Depending on the geographical location of the job site, this process can take 6-12 weeks and can cost as much as $18,000 to complete the application process.

How long is the permit valid for?

The NPDES permit is valid from July 1st to June 30th every year and an open permit needs to be renewed by June 30th if the owner requires continued discharge of their groundwater. This process is easily done by notifying the Regional Board in writing prior to the June 30th deadline and paying the permit fee ($11,734 in most regions).

 

What happens if I do not obtain a permit?

If a contractor chooses to forgo a NPDES Permit and discharge illegally, then they risk the job site being shut down and fines up to $25,000 per day plus $25.00 per gallon. Also, it is not just a financial impact when an illegal discharge occurs, the environment pays a price as well. Contaminants in the groundwater (both man made and naturally occurring) are harmful to California’s rivers, creeks and oceans. Everyone needs to do their part in protecting our coastline’s future.

How can Pure Effect, Inc. help you?

Pure Effect, Inc. can turn-key your NPDES permitting application and reduce your risk of potential delays and penalties. We can offer the following services:

 

Please visit our website at www.pureeffect.com or call (714) 639- PURE to learn more about the NPDES Permitting Process and how Pure Effect, Inc. can help you with all your water treatment needs.

Vapor Migration

Do you have a contaminated Dry Cleaner site that needs clean up?

Or do you have a Vapor Migration or Intrusion concern?

Contaminant movement into buildings due to vapor migration and intrusion from volatile organic compounds (VOCs) contamination in soil and groundwater has become a significant concern to the public, business and regulatory agencies. Dry cleaning operations use a number of VOCs that, if released to the soil and groundwater, can lead to vapor migration into buildings and pose a health threat to people.

Pure Effect can provide you with the Soil Vapor Extraction (SVE) system and Vapor Carbon Vessels needed to remove vapors in soil along with a Various Locations Permit to operate in the SCAQMD. We have 250cfm and 500cfm Blower Systems for rental. We can also manufacture SVE systems to your specification.

 

sve systems, VOC, soil vapor extraction, SVE systems

sve systems

El Nino Is Coming (So They Say)…..

swppp

El Niño is coming (so they say)!   If California experiences the wet winter that all of the experts are predicting, it will cause serious issues for industrial sites.  Southern California has already experienced multiple one day storms during the summer and it caught a number of facilities unprepared and ultimately non-compliant with the permit.

 Did you that know Pure Effect manufactures industrial stormwater treatment equipment?  Being the manufacturer allows us to have better pricing and quality control over our products:

  • Quality equipment with internal coating – This protects the equipment from rusting from the inside and adding contaminants to your stormwater.
  • Custom design – We can build the equipment to meet your specific facility requirements.  Your stormwater is not generic so why should your stormwater treatment equipment be generic?
  • Rental Equipment – We are one of the few companies that will rent industrial storm water treatment equipment.  This allows facility owners to eliminate the upfront capitol cost and have the flexibility to add or remove equipment as needed.
  • Fast lead-times – Our rental equipment can be mobilized and operational in as little as 48 hours.  Our refurbished equipment can be purchased and delivered in 1-2 weeks.
  • Extended warranties – We stand behind our equipment and will warranty all of the equipment we manufacture longer than any other equipment on the market.

 

Be prepared for the next big storm and visit www. pureeffect.com to learn more about our Industrial Stormwater Treatment Systems.

Groundwater Remediation Systems

 

Activated Carbon Treatments

Groundwater Remediation Systems are primarily used to remove pollution or contaminants from groundwater. Groundwater usually becomes contaminated as a result of natural and human activities Once it is determined that the groundwater is contaminated then regulatory agencies require the groundwater to be treated prior to discharge. The reason remediation action must be taken is the negative impact contaminated groundwater has on human health and our environment.

Groundwater Remediation is also sometimes known as Groundwater Filtration and Groundwater Treatment. Some Groundwater Remediation Systems are Temporary Remediation Systems, whereas other Groundwater Remediation Systems are permanent depending on the level of chemicals contamination and project application.

Pure Effect’s Groundwater Remediation Systems use the GAC (Granular Activated Carbon) treatment method, which is a method where Granular Activated Carbon (GAC) is inside of a Liquid Phase Media Vessel , and as the water flows through the vessel, the contaminants in the water(also known as VOC’s) are adsorbed by  the Activated Carbon . Some of the contaminants that are removed by Activated Carbon include; benzene, chlorobenzenes, trichloroethylene, carbon tetrachloride, methylene chloride and vinyl chloride. Activated Carbon Filtration media can effectively reduce the organic chemical levels found in the groundwater.

A Groundwater Remediation System is typically composed of a settling tank, a submersible or transfer pump, a bag filter and liquid phase carbon vessels. The Groundwater is pumped out of the ground into a settling tank where it is then transferred through a submersible pump or a transfer pump to a mechanical bag filter to a Liquid Phase Carbon Vessel. As it passes through the Activated Carbon Filtration Media inside of the vessel, constituents are effectively removed. Once the water has gone through the treatment process the Groundwater is ready to be discharged under a site specific discharge permit for compliance.

 

For more information on Groundwater Treatment Systems or any of our Water Treatment System Rentals contact Pure Effect at 714-639-PURE.

Using Granular Activated Carbon (GAC) For Water Treatment and Industrial Wastewater Treatment

Active coal for filters

Granular Activated Carbon (GAC) is used to adsorb natural organic compounds and synthetic organic chemicals from contaminated water. Granular Activated Carbon (GAC) is a good absorption medium because of its high surface area to volume ratio. One gram of Granular Activated Carbon (GAC) has a surface area equivalent to 1,000 square meters.

Granular Activated Carbon (GAC) Treatment generally consists of two tanks in series with Granular Activated Carbon. Water can be directed in an up or down flow configuration depending on your application.  As the contamination flows through the activated carbon, the contaminants are adsorbed from the water.

The Granular Activated Carbon (GAC) is replaced when breakthrough occurs and requires a carbon change out service. A Carbon Change out service consists of the carbon being vacuumed out of the Carbon Vessel and new Granular Activated Carbon being put into the vessel.

Depending on the site, after treatment the water is discharged into a local storm drain, stream, re-injection into on site wells  or in some cases, the water is used for on-site dust control.

For more information on Granular Activated Carbon (GAC) or Water Treatment System Rentals Contact Pure Effect today at 714-639-PURE (7873)

Carbon Filter Changeout Services

The Carbon Filtering Process is generally used for Indoor Air Purification/(quality),  (Odor) control and (emission control) Processing. Activated carbon is a general term of adsorbents that have been manufactured from a variety of carbon-based materials. Each base material results in an activated carbon with unique physical characteristics that determine its suitability for treatment applications.

panels

 

The ability of activated carbon filters to remove impurities from the air is one of the reasons it is commonly used for indoor air quality, odor control and emission control systems. Carbon Filter use continues to increase as more industries and consumers consider their environmental impact.

Carbon Filters are generally used in:

  • Landfill Lechate
  • HVAC Systems
  • Odor Control  Systems
  • Emission Control Systems
  • Municipal water Treatment Facilities
  • Spray Booths

There are different types of carbon medias which Pure Effect, Inc. uses in their carbon filters:

Standard Activated Carbons- Used to remove VOC and Odors

KMNo4 Blend Medias-specialty gasses such as sulfur oxides and ammonia

Specialty Impregnated Carbons- used to remove compounds such as mercury, H2S and cyanide.

Once the carbon has reached its capacity it is considered “spent”.  You can determine the life remaining on your carbon filters by sending a sample to Pure Effect for testing. If the carbon is “spent” the carbon filter may be recharged or replaced with new filters. With our large inventory of used filters for exchange, we guarantee your system will only be shut down for a short period of time. Please contact us at 714-639-7873 or sales@pureeffect.com  for testing.

 

 

SVE (Soil Vapor Extraction) Systems

SVE System

SVE (Soil Vapor Extraction) System

Soil vapor extraction (SVE) is an in situ remedial technology that reduces concentrations of VOC’s adsorbed to soils in the unsaturated (vadose) zone. In this technology, a vacuum is applied through wells near the source of contamination in the soil. Volatile constituents of the contaminant mass “evaporate” and the vapors are drawn toward the extraction wells. Extracted vapor is then treated with carbon adsorption before being released to the atmosphere. The increased air flow through the subsurface can also stimulate biodegradation of some of the contaminants, especially those that are less volatile. Wells may be either vertical or horizontal.

In this technology, a vacuum is applied to the contaminated soil matrix through extraction wells which creates a negative pressure gradient that causes movement of vapors toward these wells. Volatile constituents in the vapor phase are readily removed from the subsurface through the extraction wells. The extracted vapors are then pushed or pulled through activated carbon and discharged to the atmosphere.

System Design

Pilot studies are an extremely important part of the design phase. Data provided by pilot studies is necessary to properly design the full-scale SVE system. Pilot studies also provide information on the concentration of volatile organic compounds (VOCs) that are likely to be extracted during the early stages of operation of the SVE system.

A pilot test is recommended for evaluating SVE effectiveness and design parameters for any site, especially where SVE is expected to be only marginally to moderately effective. Pilot studies typically include short-term (1 to 30 days) extraction of soil vapors from a single extraction well, which may be an existing monitoring well at the site. Different extraction rates and wellhead vacuums are applied to the extraction wells to determine the optimal operating conditions.

During the Pilot Test, Radius of Influence (ROI) is the most important parameter to be considered in the design of an SVE system. The ROI is defined as the greatest distance from an extraction well at which a sufficient vacuum and vapor flow can be induced to adequately enhance volatilization and extraction of the contaminants in the soil. Extraction wells should be placed so that the overlap in their radii of influence completely covers the area of contamination.

VES Components

SVE (Soil Vapor Extraction) Systems main components consist of a Knockout Tank for water/moisture removal, Low Vacuum or High Vacuum Blower, Motor and Control Panel.  Pure Effect’s rental systems typically have these components as well as various safety sensors, silencers and an auto drain. Pure Effect can perform Pilot tests with these systems. We have Various Locations Permits for the South Coast AQMD.  Pure Effect can manufacturer an SVE System to your specifications as well.

 

For more information on SVE (Soil Vapor Extraction) Systems

please contact Pure Effect, Inc. Today.

How Do Dewatering Treatment Systems Work?

How Do Dewatering Systems Work?

osopkwy

Dewatering Treatment Systems are used to remove water from solid material or soil. Dewatering may be utilized before subterranean excavation for foundations, shoring or to lower the water table for construction projects.

A Dewatering Treatment System usually consists of the following:

When the Dewatering process begins, the water is removed from the ground by using a submersible pump or well point system where the water is pumped into the Holding Tank. The holding tank allows the larger solids to settle prior to entering the treatment system.  The water is then pumped through the system using a transfer pump and is activated by a float system located in the holding tank.

Mechanical Filtration

Depending on the amount of solids in the groundwater a sand filter may be needed to help reduce the particulate loading in the bag filters.  The sand filters have an automated backwash sequence which reduces the maintenance requirements of the system.  Bag filters are installed downstream of the sand filter to remove the solids down to the acceptable level for discharge.

Media Vessels

Even though the solids have been removed from the water during the mechanical filtration process, the groundwater still may not meet the discharge requirements due to the dissolved contaminants.  This process is done by installing media vessels downstream of the bag filters where VOC’s, metals, nutrients, and other constituents can be removed from the water.  The types of media used are Granulated Activated Carbon (GAC), Ion Exchange Resin and other natural & synthetic medias.  There are hundreds of different types of medias and each one of them serves a purpose.  This means there is no one “fix all” media.

The last step in the dewatering process before discharge is the Flow Meter.  The flow meter measures the flow rate and record the number of gallons of water that have been treated by the system. Once the water has been through the entire Dewatering Treatment System it is then discharged according to the permit requirements.

To learn more about Dewatering Treatment Systems Contact Pure Effect, Inc. today.