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Sub-Slab Soil Gas Monitoring

Sub-Slab & Vapor Intrusion Sampling

Monitor gasses directly under the slab of buildings to determine the potential for intrusion into the indoor environment. A vacuum tight seal is made through the building’s foundation, with a unique “triple seal” using two O-rings and a water dam that ensures that only gasses from beneath the slab will be drawn into the sample train and canister. After sampling, the slab face sealing fitting is removed allowing either a temporary plug to be installed, or a permanent grout seal to be made.

Advantages

Most reliable, non-contaminating slab vapor seal on the market.

Shortest and most inert flow path ensures complete recovery and no sample carryover.

Chameleon controls the flow rate to avoid disturbing the equilibrium of VOCs between gas, adsorbed soil and dissolved water phases.

Avoids the use of contaminating plastic tubing. All surfaces are Silonite™ ceramic lined stainless steel to prevent outgassing of contamination while ensuring maximum compound recovery.

Compatible with Entech helium shroud for “complete flow path” leak testing right up to the canister.

Chameleon Soil Gas Sampler shown with Entech Slab-Tight™ Sampler.

Entech Slab-Tight Sub-Slab Sampler

Entech’s unique Slab-Tight™ sub-slab sampler eliminates interferences created by grout and other slab sealing materials.

Grout may contain contaminants that can positively bias the results.

Added Down-hole moisture from the grout may affect the solid/liquid/gas phase equilibria.

The Entech Slab-TightTM sub-slab sampler makes a mechanical connection and seals with no chance of contaminating the collected soil gas.

Tracer Gas Shroud for butane or helium leak checking is available.

PN:SG-SHR-APVI

Soil Gas Shroud Leak Checking

Floods the entire sample train with helium during sampling.

Start sampling only after bringing shroud to optimum helium concentration as determined by helium detector.

Check helium coming out of sub-slab, probe, or well both during sampling, and afterwards by drawing sampling right out of canister (helium checking only).

No other technique tests the final canister directly, making it impossible to miss leaks!!!

Sub-Slab Canister Sampling Kit

Sub-Slab Vapor Intrustion Canister Sampling Kit (50cc/min) (600cc, 1L or 1.4L Cans sold seperatley)SG-SS-50-KIT
Anchor, wedge and plug kitSG-SS-AWP-KIT
Tool to expand anchor into the concreteSG-SS-Expander
Bonnet with QT Fitting and Water DamSG-SS-Bonnet-QT
Bonnet Wrench -Tightens and releases Bonnet to ConcreteSG-SS-Bonnet-Wrench
50cc/min Chameleon with 1/4" Tube Inlet & 1/4" Comp OutletSG-CHAM-QQ-050
Down-Hole Vacuum Gauge for pressuring vacuum below ground soilSG-CHAM-DHG
50cc plastic preflush syringe and needle07-20050
Indivual PartsPart #
Slab Anchor & Plug Kit - Not reuseable. One needed per InstallationSG-SS-AWP-Kit
Shroud Foam Sealing RingSG-SHR-RNG
Dual Canister Adapter w/ 2 Female Micro-QT™ Valves39-99014QT
600mL MiniCan with Micro-QT™ Valve29-MC600QT
1L Silonite MiniCan29-MC1LQT
Sub-Slab Vapor Intrusion Canister Sampling Kit (50cc/min) w/ Tracer Gas Shroud (600cc, 1L, or 1.4L Cans sold seperately)SG-SS-SHR-50-KIT
Anchor, wedge and plug kitSG-SS-AWP-KIT
Tool to expand anchor into the concreteSG-SS-Expander
Bonnet with QT Fitting and Water DamSG-SS-Bonnet-QT
Bonnet Wrench -Tightens and releases Bonnet to ConcreteSG-SS-Bonnet-Wrench
50cc/min Chameleon with 1/4" Tube Inlet & 1/4" Comp OutletSG-CHAM-TC-050
Down-Hole Gauge for measuring vacuum below ground soilSG-CHAM-DHG
50cc plastic preflush syringe and needle07-20050
Tracer Gas Shroud for Butane or HeliumSG-Shroud
1/8” Silonite line from Probe to 3-Way, w/ FMQT & 1/8" to 1/4 Tube AdaptersSG-SHR-APVI

Sub-Slab Canister Sampling Kit

DESCRIPTIONPART#
Monitoring Well KitSG-SS-SP-10-KIT
Anchor, wedge and plug kitSG-SS-AWP-KIT
Tool to expand anchor into the concreteSG-SS-Expander
Bonnet with Sorbent Pen Port and Water DamSG-SS-Bonnet-SP
Tightens and releases Bonnet to ConcreteSG-SS-Bonnet-Wrench
Diffusive Air Monitoring Sorbent Pen /w TenaxSP-DSP-T3560*
1L Silonite MiniCan (vacuum draws sample into Pen)29-MC1LQT
10cc/min Chameleon w/ dual Female MQTsSG-CHAM-QQ-010
Down-Hole Vacuum GaugeSG-CHAM-DHG
50cc Water Dam Syringe07-20050
Anchor, Wedge, and Plug Kit (One time use)SG-SS-AWP-KIT

SVOC Recovery During Vapor Intrusion Sampling

SVOCs will not transfer through lines or come out of canisters quantitatively The correct adsorbent must be chosen to allow collection and then release by thermal desorption in the laboratory The Sorbent Pen allows either diffusive sampling over a period of days or weeks, or active sampling by connecting the Chameleon and a canister of 1 to 6L in volume Active sampling will provide a better indication of the concentration of PCBs, Dioxins, Diesel and other SVOCs actually in the soil gas

Indoor Air Quality Test Kit

DESCRIPTIONPART#
24 Hour Sample - 6L CanisterIAQ-60S-24-KIT
6L Can coated TOV-2 Valve29-10622
Coated Flow Controller39-CS1200ES4
24 Hour Sample - 3.2L CanisterIAQ-32S-24-KIT
3.2L Can with coated TOV-2 Valve29-10322
Coate Flow Controller39-CS1200ES4+

24 Hour Kits are available for 600cc and 1L canister sampling

Chameleon Soil Gas Sampler
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Surface Soil Gas Monitoring
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Shallow Probe Monitoring
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Permanent Well Monitoring
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Chameleon Brochure

Sampling soil gas into canisters provides significant advantages over the use of passive adsorbent samplers with regard to both maintaining the integrity of the sample in the eld and ensuring that the best analytical technique is used in the laboratory.