Soil Gas Sampling Sample Clauses

Soil Gas Sampling. The purpose of soil gas sampling was to determine if concentrations of VOCs in soil gas at the Xxxxxx‟s Site could pose a threat to indoor air quality via vapor intrusion, and also help identify possible sources of solvent contamination on the site. Soil gas was collected from three locations (SG-1, SG-2 and SG-3) which are identified on Figure 3. SG-1 was collected outside the building footprint, but over an area that appears contiguous with the building slab about 10 feet south of the coin-op and 5 feet east of the former grocery store. This is thought by the cleaners owner to be a potential location of past releases. SG-2 was collected just inside the back door of the current coin-op, near the area of past dry cleaning operations. SG-3 was collected inside, as close as possible (about 3 feet) to the western edge of the coin-op building. In keeping with DEQ and EPA guidance for sub-slab sampling (9 and references therein), at each location a ½“ diameter hole was drilled through the slab, to a depth of approximately 8 inches, then a six- inch long screen (Geoprobe AT8625S) attached to Teflon tubing was placed beneath the slab. A cement slurry was placed around the tubing coming up from the screen. After the screens were in place, they were connected to Teflon tubing with a T-valve. One side of the T was used for purging (with a 50 ml syringe) and the other side was connected to a 1/2 –hour flow controller and a 1L summa canister. After installing the soil gas sampling holes, they were left to equilibrate for a period of 1 hour, then purged with disposable 50ml syringes of 150 ml to remove any air from the tubing and system, at which point the summa canisters were opened and the pressure was checked to ensure that the canisters were at vacuum. During the collection of the soil gas sample, a leak check gas (2-Propanol, or isopropyl alcohol) was used as a quality control measure. Rags soaked in isopropyl alcohol were placed around the sample tubing and Summa canister, and the sealed area of the slab. The presence of the alcohol vapors in the vicinity of the jar and sample train was confirmed with the PID. Photographs of the soil gas sampling are included in Appendix C. The Summa canisters were shipped to Pace Analytical in Seattle Washington for chemical analysis of VOCs by EPA Method TO-15. The analyte list included PCE, TCE, cis-1,2-dichloroethene, vinyl chloride, benzene and 2-Propanol. The results of the chemical analysis are discussed in Section 2.8.3, ...
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Related to Soil Gas Sampling

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  • Training a. The employer, in consultation with the local, shall be responsible for developing and implementing an ongoing harassment and sexual harassment awareness program for all employees. Where a program currently exists and meets the criteria listed in this agreement, such a program shall be deemed to satisfy the provisions of this article. This awareness program shall initially be for all employees and shall be scheduled at least once annually for all new employees to attend.

  • Evaluation 1. The purposes of evaluation provisions include providing employees with feedback, and employers and employees with the opportunity and responsibility to address concerns. Where a grievance proceeds to arbitration, the arbitrator must consider these purposes, and may relieve on just and reasonable terms against breaches of time limits or other procedural requirements.

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  • MANAGEMENT RIGHTS 3.01 The Union acknowledges that all management rights and prerogatives are vested exclusively with the Employer and without limiting the generality of the foregoing; it is the exclusive function of the Employer:

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  • Compliance with Laws Comply in all material respects with the requirements of all Laws and all orders, writs, injunctions and decrees applicable to it or to its business or property, except in such instances in which (a) such requirement of Law or order, writ, injunction or decree is being contested in good faith by appropriate proceedings diligently conducted; or (b) the failure to comply therewith could not reasonably be expected to have a Material Adverse Effect.

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