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FA' <br /> 4.13 Groundwater Grab Sample Collection <br /> Groundwater grab samples will be collected from each soil boring location. The groundwater <br /> samples will be collected from either well casing inserted into each boring or HydroPunch®-type <br /> groundwater sampling equipment. The well casing wil I consist of 2.5-centimeter(1-inch) <br /> diameter, Schedule 40, flush-threaded, 0.05-centimeter(0.020-inch), machine-slotted polyvinyl <br /> chloride (PVC) well screen. The soil borings may be advanced to greater depths depending on <br /> the groundwater conditions. If free product is encountered, product thickness will be verified <br /> r. using a disposable bailer. Up to three methods may be used for groundwater collection and these <br /> include the following. <br /> • Dedicated Teflon tubing with a single-ball, stainless steel check valve; or <br /> • A new disposable polyethylene or Teflon bailer, or stainless steel bailer; or <br /> FA peristaltic pump and new dedicated Te on tubing. <br /> The groundwater grab samples will be labeled, packaged, and stored on ice in an insulated chest <br /> Ffor transport under chain-of-custody manifest to a Cali ornia-certified analytical laboratory. <br /> Groundwater sampling procedures are presented in Appendix A. <br /> 4.4 Laboratory Analyses <br /> The soil samples will be submitted to Creek Environm ntal Laboratories, Inc., a California- <br /> certified analytical laboratory, for analysis. The analyses will be conducted on a normal turn- <br /> F4 basis in general accordance with U.S. Environmental Protection Agency (EPA) specified <br /> holding times. The analyses will be performed in general accordance with the following EPA <br /> methods listed. <br /> t <br /> —, Matrix Analyses <br /> . < <br /> Soil/water Title 22 Metals Scan EPA Method 6010 j <br /> i <br /> Soil/water Oil and Grease EPA Method 1664 <br /> FSoil/water Total Petroleum Hydrocarbons a Gasoline Modified EPA Method 8015 <br /> Soil/water Total Petroleum Hydrocarbons ac Diesel Modified EPA Method 8015 <br /> Soil/water Aromatic and Halogenated Volatile Organics EPA 80216 <br /> d . <br /> Soil/water Volatile Organic Compounds EPA Method 8260B <br /> Soil/water Semi-volatile Organic Compound i EPA Method 8270C <br /> Soil/water Organochlorine Pesticides and P Bs EPA Method 8080 <br /> F: <br /> Soil/water Organophosphorous Pesticides EPA Method 8140 <br /> „ j -IISACRFPIkCOMMOMsacOR2007(PR.APJM831835444.2ab.dcc <br /> . 4-3 <br />