Chemical Weapons Detection – Exhaled breath not only contains high concentrations of carbon dioxide and water vapor, but also contains a signature of all chemicals in the blood that have at least some vapor pressure to allow their exchange from the blood into the exhaled breath through the alveoli in the lungs. Sub-slab gas samples were collected using a 6-Liter Summa™ canister fitted with a flow orifice pre- calibrated to collect a 6-Liter sample over a 24-hour period. Summa canisters should be certified clean by the analytical laboratory that supplies them. Sample identification tags shall be attached to the canister using Once ... Canisters and Analyzed by Gas Chromatography/Mass Spectrometry, The sample may be stored in tedlar bags, drawn through sorbent cartridges, or analyzed directly using a direct reading instrument. The gas contained in the interstitial spaces of the soil is sampled by pulling the sample through the probe using an air sampling pump. A schematic diagram and photograph of a soil vapor sampling apparatus for collecting samples in Summa canisters is depicted in Figure 7-34 and includes the following major elements: the vapor probe tubing, a vacuum gauge, sample tubing (inert tubing such as Teflon, nylon, or stainless-steel), a flow controller, Summa canister, and gas-tight fittings. Calculate the volume of soil vapor necessary to purge Regulatory agencies may require that samples collected by this method samples be analyzed within 30 days. ADC2.1265 1.0 INTRODUCTION Presented herein is the Site Quality Assurance Project Plan (QAPP) for the sampling event to be Active Soil Gas Sampling Procedure . Soil gas samples should be collected in areas above where volatile chemical contamination in the soil or groundwater has been identified. Soil Vapor Sampling. Each sampling train consists of a 6 Liter Summa@ canister, a pre-attached flow controller, and a stainless steel trap (25.1) along with all necessary connections, plugs, filters, and instructions. Canister sampling can … To the right is a schematic of a 6L SUMMA canister. Air / Summa Canisters (Soil Gas) Parameters Volatile Organic Compounds Air / Summa Canisters (Indoor Air) Volatile Organic Compounds Lab Name/I vocation Lancaster Laboratories 2425 New Holland Pike Lancaster, PA 17601 (717) 656-2300 Datachem Laboratories 960 West Levoy Drive Salt Lake City, Utah 84123 (801)266-7700 canisters by air, Holding time for H2S, Use of Silco Canisters; Trip Blanks Michael Tuday, Columbia Analytical (15 minutes, followed by open discussion) Power Point 3:00 – 3:15 Break 3:15 – 3:55 Results from the EPA 2007 Workshop on Soil Gas Sampling & Analysis Methods and from Recent EPA Research Programs on Soil Gas Methods. Soil gas is usually analyzed with the same methods used for indoor air, which in the U.S., generally means EPA Method TO-15. 1.2.2.4. With the tightness testing complete, approximately 3 volumes of air is purged from the soil gas sampling point. EQUIPMENT LIST: 1) Pre-cleaned and individually certified summa canister* GENERAL PROVISIONS: This is the default procedure to be followed when installing and sampling active soil gas monitoring points. The laboratory cleans the Summa canisters after each use. SUMMA canisters has been shown to be stable for up to 30 days2. Sub-slab sampling points were installed to collect soil gas immediately below the slab at each of the seven indoor air sampling locations . Sampling is achieved by soil gas equilibration with the evacuated Summa canister. Custody seals should not be placed on the canisters due to VOCs that may out-gas from the adhesives. The Summa Canister is a commercially available sampling system. Larger canisters are available for sampling periods in excess of 24-hours. Gas Canisters - Sampling Flexibility •Sampling device can be set for 4 or 8 hours with a 1.41 canister •For sampling periods up to 3 days a 6 litre canister is used •Sampling device is weather proof •Can be used for perimeter, ambient air and indoor air monitoring Ambient air set-up (1) Critical Orifice Assembly (COA) For time-integrated soil gas, sub-slab, SVE system, or other vapor sample. Sampling Instructions QTY. SUMMA Air Sampling Canister. The Summa canisters used for soil-gas sampling have a one to six liter sample capacity. Summa Canister Sampling Soil Gas Sampling Charcoal Tube Sampling in Ambient Air RST Region 1) version 2000.4 7/01 . Summa canisters. (1) Flow controller/ regulator For time-integrated indoor air or ambient air sample. The flow controllers are pre-cleaned and typically adjusted for a one hour sampling event. Soil-gas sampling using Summa-Canister® Summa-Canister® is a stainless steel container which the internal surfaces have been treated (summa process) to avoid adsorption of compounds. From our highly skilled laboratory, we can provide a standard 5 day turnaround with a faster 3 day turnaround available upon request depending on laboratory capacity. Specifications: 0.45/1/3/6/15L. Samples that will be transferred to Summa canisters will be collected in clean, dedicated Tedlar bags. Inert, small diameter tubing, ... Sub-slab soil gas and indoor air concentrations collected from homes with unsealed sump pits should be assessed to determine whether the default attenuation factor of 0.1 is protective of the ... probe and sampling canister. Shown are the sample valve (1), inlet (2), and vacuum/pressure gauge (3). Calscience offers 1L and 6L SUMMA canisters. Canisters are well-suited for many types of sampling, including, but certainly not limited to, indoor air quality (IAQ), landfill/soil gas, stack gas, product off-gassing, product quality testing, product liability testing, and emergency response. (1) Analog Gauge The Summa Canisters are described in EPA Method TO-15 , and are commonly used for the collection of volatile organic compounds (VOCs) in ambient and indoor air. SUMMA canisters come in sizes ranging from 400 ml to greater than 6L. If canisters are being used to collect the soil vapor sample, be aware that a gauge on the Summa canister measures the vacuum in the canister, not the vacuum applied to the soil vapor probe, so an additional gauge must be emplaced in the sampling train between the flow regulator on the canister and the probe (Figure G-12). Other field air monitoring devices, such as the combustible gas indicator (MSA CGI/02 Meter, Model 260) and the Organic Vapor Analyzer (Foxboro We offer a variety of sampling train and vacuum gauge configurations that can be customized upon request to accommodate your site specific monitoring requirements.
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