Laserfiche WebLink
Task 1 . 1 : Review v i of rm n it <br /> Necessary Permits <br /> Collect and review available information and <br /> reports related to any past or ongoing subsurface <br /> investigation at the nearby service stations to <br /> determine the potential relationships of the <br /> sources and nature of hydrocarbon contamination at <br /> the site. Prior to commencing with the <br /> supplemental investigation, all required permits <br /> will be obtained and field activities will be <br /> coordinated with the appropriate agencies. This <br /> will include locating underground utilities and <br /> interferences that may be encountered during <br /> drilling or field activities. <br /> Task 1 .2 : Perform Aguifer Analysis andTesting <br /> Depending on site-specific condition, either a <br /> one-day pump test or slug test will be performed <br /> to determine hydrogeologic characteristics of the <br /> aquifer, including vertical transmissivity and/or <br /> hydraulic transmissivity. A laboratory <br /> permeability test of selected soil samples <br /> collected during installation of monitoring wells <br /> will also be conducted. <br /> Task 1 - 3 : Cgnduct Qualitativeshallow Water Survey <br /> A qualitative sampling and analysis of the shallow <br /> ground water will be conducted to determine the <br /> lateral extent of ground water contamination. The <br /> qualitative survey is essentially a screening <br /> process to assist in determining the most <br /> appropriate locations of the additional monitoring <br /> wells necessary to fully define the nature and <br /> extent of contamination. The procedure to be used <br /> will be based on the soil gas survey technique in <br /> combination with the technique for ground water <br /> sampling (such as the Hydropunch) . All samples <br /> collected will be analyzed onsite for the <br /> specified constituents, using field instruments or <br /> a mobile laboratory. <br /> The location of the sampling points will be <br /> determined in the field, using results of previous <br /> investigations and onsite sample analysis . <br /> Samples will be analyzed for total volatile <br /> hydrocarbons or TPH, and for BTEX components. <br /> 3 <br />