BESST, Incorporated stands for Best Environmental Subsurface Sampling Technologies. We are a groundwater technology and services company that specializes in groundwater wells and exploratory boreholes. Since 1999, we have passionately pursued our mission to design, develop, build, and deploy forensic, technically minded, miniaturized, subsurface-based technologies for solving groundwater quality and quantity problems in innovative and cost-effective ways.
We strive to say “yes” to a wide variety of challenges offered by our customers that drive our core strengths – research and development followed by practical, real-world implementation. We are excited to undertake new challenges. Your success is our success.

Who are we??

Leslie Emmens

Main Office

Noah Heller, MS, PG

President/Founder

Miles Koehler

Inside Sales and Technical Info

James Tsumura

Outside Sales

Our company’s vision is technically expansive and focused on advancement of subsurface data acquisition technologies for groundwater applications. Our team of geoscientists and engineers at BESST listen to the unique nature of each problem as defined by our clients and then provide scientifically focused solutions.
In pursuing our mission, we offer our palette of subsurface technologies and services at highly competitive prices. We work with hundreds of municipalities, hundreds of private water companies, government entities such as the Department of Energy and the Department of Defense, and many more organizations within the agricultural, mining, geotechnical, and environmental sectors.
In our mind, “challenge” means “opportunity”!

Mission Statement

Flow & Chemistry Profiling

Water Well Services

Long Screen Test Well

Exploration Support

Groundwater, Soil & Gas Sampling

Sampling Equipment

## Treatment Avoidance
Using Well Profiling under Ambient and Dynamic conditions

## Well inspection
New Well, Water-Quality Failure Diagnostics

## Support Services

Rapid High Resolution Site & Well Characterization

## Soil Sampling
Precision Groundwater & Soil Gas Sampling


## Deep Borehole Sampling
Groundwater samples up to 3,000 feet downhole

## Groundwater sampling
Capable of sampling in 1.25-inch diameter wells

Johnson Utilities (Arizona)

Burns and McDonnell (California)

Water Replenishment District (California)

## Products 

We offer a wide variety of products, designed by BESST to meet the needs of our clients. We take pride in our customized solutions, which in many cases lead to the design of novel technologies that drive the subsurfaces services towards the future. 

[Groundwater Sampling Pumps](/products-pages/panacea-groundwater-sampling-maps)
![products1.png](https://besst.teocoop.site/uploads/products1_c635449718.png)

[SimulProbes Samplers](/products-pages/simulprobes-samplers)
![products1.png](https://besst.teocoop.site/uploads/Products_simulprobe_9acac5550f.png)


[Multilevel Monitoring Wells](/products-pages/multilevel-monitoring-wells)
![products1.png](https://besst.teocoop.site/uploads/zist_58bbe6c9f7.jpg) 


[Volume Boosters](/products-pages/volume-booster)
![products1.png](https://besst.teocoop.site/uploads/sampling_4_products_page_f79fb529f0.jpg) 

[Timer Control Units](/products-pages/volume-booster)
![products1.png](https://besst.teocoop.site/uploads/Products_TCU_4912b07076.jpg)

#### [Panacea P100 for 1″ wells](/products-pages/panacea-groundwater-sampling-maps/1)

![pana1.jpg](https://besst.teocoop.site/uploads/pana1_7ec902478c.jpg)


#### [Panacea P125 for 1.25″ Wells](/products-pages/panacea-groundwater-sampling-maps/2)

![pana2.jpg](https://besst.teocoop.site/uploads/pana2_967fbbd441.jpg)


#### [Panacea P200 for 2″ and larger wells](/products-pages/panacea-groundwater-sampling-maps/2)
![pana3.jpg](https://besst.teocoop.site/uploads/pana3_3b255a518a.jpg)


#### The solution to the toughest groundwater sampling challenges

BESST’s Panacea Pumps are unmatched in reliability and versatility, offering the solution to whatever challenge you might be facing in groundwater sampling.

- Deep water
- Narrow Wells
- Large Purge Volume
- Low submergence
- Crooked wells
- High gas consumption
- Slow Recharge
- Corrosive environments
- Extreme temperatures

The pump is powered by inert gas or air, meaning no more risk of malfunctioning from overheating motors. The two-valve lift system, when used in ratchet mode, does not allow the gas to contact the sample water. This pump also enables a gentle discharge of the sample, eliminating the need for fragile and unreliable bladders. Panacea Pumps are available in a variety of sizes and materials. The miniaturized [P100 ](/products-pages/panacea-groundwater-sampling-maps/1)and [P125](/products-pages/panacea-groundwater-sampling-maps/2) are ideal for narrow or obstructed wells where clearance is an issue. The [P200](/products-pages/panacea-groundwater-sampling-maps/3) is designed for wells 2” and larger, and takes advantage of the additional space with a 200 mL chamber to boost purge and sample volume. All Panacea Pumps are available in 316 stainless steel, for increased depth capability up to 3000 Ft. BGS as well as resistance to corrosive or extreme environments.

Benefits to using the Panacea pump include:
- No motor or bladder
- Deployed in wells as small as 1”
- Volume Booster technology for low submergence and deep first water
- Customizable compression fittings for different tubing (standard 1/4″ connections)
- Delrin, 316 Stainless Steel or PVC construction
- Includes hook or port for support cables
- Customizable filter options: Ceramic, Poly, Stainless
- Integral with [Zone Isolation Sampling Technology (ZIST)](/products-pages/multilevel-monitoring-wells/2)

## P100

The Panacea P100 features miniaturized BESST technology to achieve a small profile, capable of being installed in wells as narrow as 1” diameter. The P100 features 316 stainless steel construction for high pressure applications as well as maximum durability. The low pressure model uses QuickConnect to make assembly and deployment simple and efficient. For deeper applications, our high pressure model is used, featuring compression fittings similar to those on the other Panacea pumps. 
The P100 is built with a standard 80 micron Poly filter at the intake to prevent sediment from interfering with the valves. The filter connection can also be easily modified with a drop tube to customize the intake depth.

![pana1.jpg](https://besst.teocoop.site/uploads/pana1_7ec902478c.jpg)

#### PDF Downloads
 - [Product Overview](http://besst.teocoop.site/uploads/2021_BESST_ONLY_Panacea_Pumps_e150563ac4.pdf)
- [Panacea P100 LP Guide](http://besst.teocoop.site/uploads/Panacea_P100_LP_Guide_679a407b02.pdf)

## P125

The Panacea P125 is designed for use in applications with wells too narrow for the Panacea P200, especially in 1.25” diameter [ZIST wells](/products-pages/multilevel-monitoring-wells/2). The P125 features 316 stainless steel construction for high pressure applications and the same size valves as the P200 for maximum flow rate.
The P125 is built with a standard 80 micron Poly filter at the intake to prevent sediment from interfering with the valves. The filter connection can also be easily modified with a drop tube to customize the intake depth.

![p125.jpg](https://besst.teocoop.site/uploads/p125_417f9e0913.jpg)

#### PDF Downloads
- [Product Overview](http://besst.teocoop.site/uploads/2021_BESST_ONLY_Panacea_Pumps_c627b1f769.pdf)
- [Panacea P125 Guide](http://besst.teocoop.site/uploads/Panacea_P125_Guide_319a216b5c.pdf)




## P200

The Panacea P200 is the most popular in BESST’s Panacea family. With a 1.75” outer diameter, the P200 is suitable for use in 2” and larger wells. It is available in Delrin Plastic,316 Stainless Steel, and PVC models depending on your application and budget.
The P200 also features a 60 micron alumina based ceramic filter as well as a redundant screen for thorough filtering, ensuring that no sediment becomes lodged in the valves. This advanced filter system keeps the pump operational for long-term use with little to no maintenance.

![p200.png](https://besst.teocoop.site/uploads/p200_1d7d12b7f1.png)

#### PDF Downloads
- [Product Overview](http://besst.teocoop.site/uploads/2021_BESST_ONLY_Panacea_Pumps_P200_8733d757e1.pdf)
- [Panacea P200 Delrin Guide](http://besst.teocoop.site/uploads/Panacea_P200_Delrin_Guide_0a0d870888.pdf)

## Standard-Sized SimulProbes

BESST’s SimulProbe is used in exploratory borehole drilling for environmental, water resource, agricultural, nuclear or mining industries, to collect a simultaneous soil core and ground water sample.

## The Crustbuster

The probe is driven into the ground by a hammer. It is then collected inside the core-barrel chamber within the lower half of the probe. The probe is lifted 4 inches, opening a hidden compartment that channels the groundwater into a water canister through Teflon straws located in the grooved edges running along the length of the core-barrel. The water canister is closed by back pressurization, which prevents the escape of Volatile Organic Compounds (VOC) while the probe is removed from the exploratory borehole. At the surface the soil core and groundwater sample can be easily removed from the SimulProbe for shipment to a laboratory.

#### Benefits
- Representative sampling. Soil core and water samples are taken at the same place
- Can also be used for simultaneous soil core and soil vapor
- Time saving. Quick setup and mobilization
- VOC measurement. Back pressurization keeps VOC’s in groundwater samples and provides higher accuracy laboratory results

#### Features
- Length: 4.5 feet
- Maximum outside diameter: 4 inches (in)
- Core dimensions: length 19.6 in , diameter 2.38 in
- Water canister volume: ½ US Gallon (additional water canisters can be stacked for a larger volume)
- Pressurization: Nitrogen gas or Air compressor
- Top connection: NW (custom options available upon request)
- Rig compatibility: Hollow Stem Auger, Mud and Air Rotary, Casing Hammer, Dual Wall Percussion, Sonic
- Durability: 10000 pound-force (lbf) strike

#### PDF Downloads
- [CrustBuster Product Overview](http://besst.teocoop.site/uploads/2021_BESST_ONLY_Simul_Probe_Crustbuster_1_c7d007f9a4.pdf)

## The MaxiProbe
BESST’s MaxiProbe is very similar to the CrustBuster. The MaxiProbe has a different thread type at the drive head, thinner walls above the core-barrel and a durability of 6,000 lbf strike. 

#### Benefits
- Representative sampling. Soil core and water sample are taken at the same place
- Can also be used for simultaneous soil core and soil vapor
- Time saving. Quick setup and mobilization
- VOC measurement. Back pressurization keeps VOC’s in groundwater samples and provides higher accuracy laboratory results

#### Features
- Length: 4.5 feet
- Maximum outside diameter: 4 inches
- Core dimension: length 19.6in, diameter 2.38in
- Water canister volume: ½ US Gallon (additional water canisters can be stacked for a larger volume).
- Pressurization: Nitrogen gas or Air compressor
- Top connection: NW (custom options available upon request)
- Rig compatibility: Hollow Stem Auger, Mud and Air Rotary, Casing Hammer, Dual Wall Percussion, Sonic.
- Durability: 6,000 lbf strike

#### PDF Downloads
- [MaxiProbe Illustrated SOP](http://besst.teocoop.site/uploads/Maxi_Probe_Illustrated_SOP_fbb26d28d2.pdf)

 


## MiniProbe SimulProbe

#### Simultaneous soil core and soil gas sampling
BESST’s Mini SimulProbe is used in exploratory borehole drilling to collect a simultaneous soil core and soil gas samples. The probe is driven into the ground by a hammer, causing the soil to enter the core-barrel inside the probe. Next, the probe is lifted two inches, opening a hidden compartment that channels the soil gas into the probe through two Teflon straws located in the split half grooves that run along the edges of the core barrel. A vacuum pump is connected to a tube running from the probe to the surface. The vacuum pump is used to collect the gas directly from the soil. Once the gas sample has been collected using a Tedlar bag, Summa Canister or Soil Gas Syringe, the probe can be removed from the borehole and the soil core sample can be easily removed from the SimulProbe for shipment to a laboratory.

#### Benefits
- Representative sampling: Soil core and soil gas samples are simultaneously at the same spot.
- Volatile Organic Compounds (VOC) measurement: The VOC’s are directly collected from the ground which limits cross-contamination of the sample.
- Time savings: Quick setup and mobilization. System can be used with a photoionization detector (PID) for on-site results.
- In-Situ Headspace Test: Enhances accuracy of on-site field measurements by directly sampling the soil-gas downhole, rather than using unreliable ex-situ methods, which damage sample integrity.

#### Features
- Length: 2 feet
- Maximum outside diameter: 2 inches
- Core Length 17.4 inches
- Core Diameter 1.18 inches
- Top Connection: AW (custom options available upon request)
- Rig Compatibility: Hollow Stem Auger, Air Rotary Casing Hammer, Dual Wall Percussion, Sonic


#### PDF Downloads
- [MiniProbe Illustrated SOP](http://besst.teocoop.site/uploads/Mini_Probe_Illustrated_SOP_640851a08e.pdf)
- [MiniProbe Product Overview](http://besst.teocoop.site/uploads/2021_BESST_ONLY_Simulprobe_Mini_b4471115e1.pdf)

## SimulProbes Samplers

BESST’s SimulProbe is used in exploratory borehole drilling for environmental, water resource, agricultural, nuclear or mining industries, to collect a simultaneous soil core and groundwater or gas sample.

#### Highlights 

- In-Situ Headspace Test: Enhances accuracy of on-site field measurements by directly sampling the soil-gas downhole, rather than using unreliable ex-situ methods, which damage sample integrity.
- Quick setup and mobilization. System can be used with a photoionization detector (PID) for on-site results.
- Volatile Organic Compounds (VOC) measurement: The VOC’s are directly collected from the ground which limits cross-contamination of the sample.

#### The SimulProbes

- [MaxiProbe ](/products-pages/simulprobes-samplers/1)
- [CrustBuster](/products-pages/simulprobes-samplers/1)
- [MiniProbe](/products-pages/simulprobes-samplers/2)



## Inline

Coming soon. If you have any questions, please [contact us](/contact)

## Retro Zone Isolation Sampling Technologies

#### Reducing Purging Volume

Isolating the well screen from the rest of the well casing sharply reduces the required volume to be removed. Instead of using expensive and difficult inflatable packers to isolate the screened interval of a well, the BESST Retro ZIST uses a series of stacked conformable washers to seal the inside of the casing directly above the well screen with the support on the well bottom by a perforated support post. Standard Retro ZIST systems are designed for 2” and 4” diameter wells, with custom sizes available. Shown at the right is a 2” Retro ZIST system with two displacement barrels for illustration. Barrels stack to fit the length of the well screen.

#### Maximum Purge-Volume Reduction Using Volume Displacement Stems

Maximizing purge volume reduction is a key goal of the Retro ZIST technology. There are two aspects to this concept. First, there is the casing volume, which is addressed by using the stacked sealing washers to isolate the well screen from the above casing. Second, there is the well screen volume itself (including the surrounding filter pack), which the Volume Displacement Stem minimizes while also supporting the isolation washers and receiver. There are two deployment options available. Option #1 uses a screened PVC support post composed of stacked Displacement Barrels and Option #2 uses a sand-filled solid support inner well screen. These options displace 65-85% of the water volume stored inside the well screen section of the well.

#### Water Level Measurements

Water level measurements are simply accommodated. The pump is lifted up a few inches off the docking station allowing groundwater within the well screen to communicate with the atmosphere and adjust to hydrostatic pressure over time. The tubing slack (from the slightly lifted pump) is attached via a tubing clip located on the underside of the well suspension cap. When the operator opens the well, the first task typically is to obtain a water level measurement. The pump is then reset into the conical docking station by lowering it a few inches until it seats – thereby allowing the well screen section to be purged and sampled.

#### PDF DOWNLOADS

- [Product Overview](http://besst.teocoop.site/uploads/ZIST_sensor_280f05d421.pdf)

## Multilevel Monitoring Wells: Zone Isolated Sampling Technology

#### Zone Isolation Sampling Technologies
Purge volume reduction can be an important consideration for long-term groundwater monitoring programs. Early technical guidance from the US EPA Superfund Program prescribed the concept of 3-5 wet casing volume purging and was quickly adopted by many regulatory agencies throughout the US. This can lead to time, transport and storage problems when purging large volumes of water from a well, especially in remote or hard to access locations.

Zone Isolation Sampling Technologies (ZIST)™ [In-Line](/products-pages/multilevel-monitoring-wells/1) Systems isolate the well screen, allowing for a low-flow sampling and fast parameter stabilization, in which pumps do not draw stagnant water from the riser pipe above the screen. As a result, data quality is improved, costs are minimized (system components, drilling, installation, and operation over time), and sampling time reduced. BESST’s [Panacea Pumps ](/products-pages/panacea-groundwater-sampling-maps)dock with the ZIST™ Well Screen Receptacle located between the well screen and riser pipe and draw samples only from the well screen. The pump can easily be removed for maintenance, pumping tests, or use of other monitoring devices.

#### Benefits of ZIST™
- Reduces costs
- Eliminates drawdown
- Reduces purge volume as a result of sampling mechanism
- When 3-5 wet casing volumes are required, purge volume is reduced by as much as 60% by ZIST displacement systems

#### PDF Downloads
- [In-Line Well System: For New Wells ](http://besst.teocoop.site/uploads/ZIST_inline_8896a39b54.pdf)
- [Retrowell System: For Existing Wells ](http://besst.teocoop.site/uploads/ZIST_retro_db22b6fbfd.pdf)
- [Multilevel System: For Simultaneous Samplings](http://besst.teocoop.site/uploads/ZIST_multi_7dc5bc90b5.pdf) 
- [ZIST with Integrated Sensor Technologies](http://besst.teocoop.site/uploads/ZIST_sensor_08af35410c.pdf) 
- [ZIST ads ](http://besst.teocoop.site/uploads/zist_ads040407_f672a6a02a.pdf)






## BESST Volume Booster
Maximize the volume of each pump stroke!
When used in conjunction with BESST’s [Panacea Pumps,](/products-pages/panacea-groundwater-sampling-maps) BESST’s Volume Boosters enable sampling and purging from wells with water columns as small as 4 feet, and can be used at depths up to 2,000 feet below ground surface. The greater pump stroke volumes created by the Volume Booster means that the same Panacea Pump can be used in both the purging and sampling processes, dramatically reducing time spent in pump deployment and retrieval.

![Volume Boosters.jpg](https://besst.teocoop.site/uploads/Volume_Boosters_34c790b157.jpg)

Schematic of a Flexible Stainless Steel Volume Booster

The Volume Booster is installed in line with a BESST Panacea Pump and sits directly above the pump, connected with tubing and compression fittings. The Volume Booster acts as a reservoir, storing additional water to pump from the well. Water in the Volume Booster is stored along the gas-in line for the system, maximizing the amount of water that can be sampled without any nitrogen gas coming into contact with the sample. Proper choice of Volume Booster can reduce sampling events to as little as 25% the amount of time they would otherwise require.
The Volume Booster is available in a variety of materials and sizes, able to be adapted to any monitoring well. Deep water, small water columns, narrow or even crooked pipe, there is a Volume Booster for every well. BESST’s Volume Booster unlocks the full potential of the Panacea Pump, making purging and sampling fast and efficient.

#### Typical industry applications include:
- Environmental
- Water Resources
- Geotechnical
- Mining
- Energy
- Nuclear

#### PDF Downloads
- [Product Overview](http://besst.teocoop.site/uploads/2021_BESST_ONLY_Volume_Boosters_53fb8660c7.pdf)
- [Flexible Volume Booster Guide](http://besst.teocoop.site/uploads/Flexible_Volume_Booster_Guide_d13a7a7c4f.pdf)
- [Stainless Steel Rigid Volume Booster Guide](http://besst.teocoop.site/uploads/Rigid_Volume_Booster_Guide_0cd454c383.pdf)


## BESST Timer Control Unit

#### Automate and optimize pump operation

BESST’s [Panacea Pumps](/products-pages/panacea-groundwater-sampling-maps) are powered by cycles of pressurized nitrogen gas or air which lifts the sample or purges water to the surface. BESST’s Timer Control Units (TCU) allow for easy control and automation of the discharge and recovery cycles when using BESST Panacea Pumps.
The TCU is housed in a sturdy Pelican case for increased portability and field durability, and features an easy to use interface. A dual cycle timer controls the discharge and recovery cycles times, and a pressure gauge provides a read out of the pressure being used. Timer controls are extremely flexible, allowing different times for discharge and recovery. This versatility enables use in a great variety of wells: low or high water volume, fast or slow recovery rates.

#### Customizable Features
- Available in single and multi-channel models for controlling up to 4 pumps at once
- Perfect for nested or close proximity wells. Multi-channel controllers have integrated regulators for individual pressure control
- AC or DC power options
- DC power models for use up to 1300 Ft. BGS. AC power models for use up to 3000 Ft. BGS
- Standard timer ranges from 0.05 s – 30 h. Custom timer options allow up to 300 h cycle times
- QuickConnect or compression fittings for gas-in and gas-out lines

#### PDF DOWNLOAD

- [Product Overview](http://besst.teocoop.site/uploads/2021_BESST_ONLY_Timer_Control_Unit_b729326ee5.pdf)


## Product SOPS PDF DOWNLOADS

#### Panacea Pump: Groundwater 
- [Panacea Product Overview](http://besst.teocoop.site/uploads/2021_BESST_ONLY_Panacea_Pumps_f942a22c83.pdf)
- [Panacea P200 Delrin Guide](http://besst.teocoop.site/uploads/Panacea_P200_Delrin_Guide_11b57c2299.pdf)
- [Panacea P125 Guide](http://besst.teocoop.site/uploads/Panacea_P125_Guide_53ccb0bf0f.pdf)
- [Panacea P100 Low Pressure Guide](http://besst.teocoop.site/uploads/Panacea_P100_LP_Guide_f44352b6af.pdf)

#### Simulprobes: Simultaneous Soil and Soil-gas OR Soil and Groundwater Sampling Tools
- [CrustBuster Product Overview](http://besst.teocoop.site/uploads/2021_BESST_ONLY_Simul_Probe_Crustbuster_7405a1b269.pdf)
- [MiniProbe Product Overview](http://besst.teocoop.site/uploads/2021_BESST_ONLY_Simulprobe_Mini_5282ae3639.pdf)
- [Operation Manual CrustBuster and MaxiProbe](http://besst.teocoop.site/uploads/Maxi_Probe_Illustrated_SOP_76bf5e43e6.pdf)
- [Operation Manual MiniProbe](http://besst.teocoop.site/uploads/Mini_Probe_Illustrated_SOP_8e7d6aed9e.pdf)

#### Zone Isolation technology: Inline

- [Product Overview](http://besst.teocoop.site/uploads/2021_BESST_ONLY_Inline_ZIST_786d31927f.pdf)
- Installation and Operation Manual COMING SOON

#### Zone Isolation technology: Retro
- [Product Overview](http://besst.teocoop.site/uploads/2021_BESST_ONLY_Retro_ZIST_d5736c1e9b.pdf)
- Installation and Operation Manual COMING SOON

#### VolumeBooster
- [Product Overview](http://besst.teocoop.site/uploads/2021_BESST_ONLY_Volume_Boosters_56fc285d78.pdf)
- [Flexible Volume Booster Guide](http://besst.teocoop.site/uploads/Flexible_Volume_Booster_Guide_2410c5319f.pdf)
- [Rigid Volume Booster Guide](http://besst.teocoop.site/uploads/Rigid_Volume_Booster_Guide_6078dbddfa.pdf)

#### Timer Control Unit
 - [Product Overview](http://besst.teocoop.site/uploads/2021_BESST_ONLY_Timer_Control_Unit_78a654512c.pdf)
 - [Timer Control Unit Quick Reference](http://besst.teocoop.site/uploads/Quick_Reference_Single_Channel_Timer_Control_Guide_table_be23d7b634.pdf)

## Packer Integrated Samplers

Coming soon. If you have any questions, please [contact us](/contact)


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