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Geosyntec <br /> consultants <br /> A-Zone aquifer and 24 ounces representative of the B-Zone aquifer will be collected <br /> from each boring location). Samples will be collected in transferred to a laboratory- <br /> supplied clean glass jar. All soil samples will be stored in an iced cooler, packaged <br /> under Chain-of-Custody (COC) protocol, and shipped to a California-certified <br /> analytical laboratory as described below in Section 4.2.5 and in the QAPP <br /> (Appendix A). <br /> The soil samples collected from the borings will be analyzed for geochemical <br /> parameters (non-COPCs) as inputs for the remedial technology alternative evaluation by <br /> one or more of the following methods: <br /> • Chemical oxygen demand by USEPA Method 5220C; <br /> • Arsenic, chromium, calcium, iron, manganese, potassium, and sodium by <br /> USEPA Method 6010B; and <br /> • Sulfate,nitrate as nitrogen(N), and nitrite as N by USEPA Method 300. <br /> 4.2.1.2 Grab Groundwater Sampling <br /> At location EBI on Figure 3 and locations B2 and B4 on Figure 5, grab groundwater <br /> samples will be collected at 10 foot intervals within the A-Zone aquifer and the B-Zone <br /> aquifer. Grab groundwater samples will be collected by advancing a hydropunch <br /> groundwater sampler or equivalent to develop a vertical profile of COPCs in <br /> groundwater. Prior to advancement of the groundwater sampling apparatus, the outer <br /> sonic casing shall be advanced to the top of the desired sampling interval. <br /> Groundwater samples will be collected directly from the sampling apparatus and placed <br /> directly into the sample containers supplied by the laboratory. All groundwater samples <br /> will be stored in an iced cooler, packaged under COC protocol, and shipped to a <br /> California-certified analytical laboratory as described below in Section 4.2.5 and in the <br /> QAPP (Appendix A). Sample containers will be labeled with sample identification <br /> number, date, time, requested analyses, preservation method, and sampler's initials. <br /> Groundwater samples from the borings will be analyzed for VOCs using USEPA <br /> Method 8260B. <br /> 4.2.2 Well Installation <br /> Five (5) groundwater wells will be installed in the A-Zone aquifer east of the source <br /> area as shown on Figure 4 (location Al through A5) and four (4) groundwater wells <br /> will be installed in the B-Zone aquifer east of the source area as shown in Figure 5 <br /> Pre-Design Investigation Work Plan 18 18.05.12 <br />