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i <br /> NOA Drywell Closure and Investigation Page 15 of 26 <br /> May 30, 2014 <br /> One (1) soil sample was collected from DW-1 and split between two identical containers to fulfill <br /> the Replicate Samples Quality Control/Quality Assurance requirement (See Section 4.5). Both <br /> containers were analyzed for the following: <br /> • RCRA Metals by EPA Method 6010 <br /> 5.1.3 Equipment Blank <br /> One (1) equipment blank was obtained during soil sampling and one (1) equipment blank was <br /> obtained during groundwater sampling. Both equipment blank samples were analyzed for the <br /> following: <br /> • RCRA Metals by EPA Method 6010 <br /> 5.1.4 Waste Characterization <br /> Seven (7) soil samples were collected from the seven (7) drums containing drill cuttings and <br /> waste water from overdrilling and sampling activities. Samples were composited 4:1 And 3:1, <br /> for a total of two (2) soil samples analyzed for CAM-17 Metals by EPA Method 6010 with the <br /> Total Threshold Limit Concentration (TTLC) extraction method. <br /> 5.2 Analytical Deviations <br /> The following deviations from the work plan arose during laboratory analysis: <br /> • Total Recoverable Petroleum Hydrocarbon samples were analyzed using EPA Method <br /> 418.1 rather than EPA Method 8440. This method was used since the certified analytical <br /> laboratory only uses this method for Total Recoverable Petroleum Hydrocarbon analysis. <br /> 5.3 Analytical Results <br /> A total of thirteen (13) soil samples, fourteen (14) groundwater samples, and two (2) <br /> equipment blank samples were collected during sampling activities for laboratory analysis. The <br /> analytical results for the soil and groundwater samples are summarized below in Tables 2 - 8. <br /> Only Constituents of Potential Concern (COPCs) with elevated levels in soil and/or groundwater <br /> samples are included below. In addition, the two (2) composite samples analyzed for CAM-17 <br /> Metals with TTLC for landfill profiling are included below in Table 9. All of the analytical results <br /> are attached as Appendix D. <br /> 1 902 Industrial Way • Lodi, CA 95240- 209.367.3701 • Fax 209.333.8303 02014 Neil 0.Anderson fi Associates, Inc. <br />