SR0084326 - Laserfiche WebLink

Home Browse Search

Passive Soil Gas and Subslab Installation and Retrieval Standard Operating Procedure (SOP) Exposure Period The exposure period for a passive soil gas sampler depends primarily on reporting requirements. If concentrations in ug/m3 are to be reported,refer to the summary table for limits of detection for the compound of interest. If mass is to be reported, the recommended exposure period shall depend upon the type of volatile or semi-volatile compounds being investigated, the soil type, depth to groundwater and ground surface. Generally, a minimum of 1 day and up to 14 days is employed to achieve most objectives. In areas of suspected high concentration, collectors can be left in the ground for shorter periods (1 to 5 days). In areas of suspected low concentrations, collectors are often left in the ground for two or more weeks. PSG Sampler Retrieval At each sample location open the BeSure Sample Collection Kit and place it and the wire cutters within easy reach. Remove a square of gauze cloth and place it and a clean towel on the open Kit. Remove a solid cap from the Cap Storage Container and place it on the Kit. Expose the Sampler by pulling on the wire when in soils or using a small chisel and hammer to chip the thin concrete patch away when in asphalt/concrete. Retrieve the Sampler from its hole by pulling on the retrieval wire and or aluminum foil. Holding the Sampler upright, clean the sides of the vial with the clean towel (especially close to the Sampling Cap). Remove the Sampling Cap, cut the wire from the vial with the wire cutters, and clean the vial threads completely with the gauze cloth. Firmly screw the solid cap on the Sampler Vial and with a ballpoint pen record the sample number, corresponding to the sample location, on the cap's label. Documentation and Field Report On the Field Deployment Report, record: (a) date and time of retrieval (to nearest minute); and (b) any other relevant information. On the Chain of Custody, record: (a) date and time of retrieval; and(b) any other relevant information. After all samples have been retrieved, complete the chain-of-custody for shipment of Samplers. Seal the BESURE Sample Collection Kit with the provided tug tight custody seal, provided in the Kit, which has a unique identification number that is documented on the chain-of-custody. Place the Kit and paperwork in a cardboard box and ship via overnight delivery to Beacon Environmental Services for analysis of the samples. Preparation and Shipping to Beacon Laboratory Return the sampling cap to the Sampling Cap container. Place the sealed and labeled Sampler Vial in a 3"x 4"re-sealable Sampler Bag. Then44e S place the individually bagged and labeled sampler into the larger bag * a e°x r labeled"Return Shipment Bag."Each sampler is to be individually s° bagged and placed in a Return Shipment Bag,with at least one trip blank per Return Shipment Bag included with the PSG Samplers. Page 7 of 8