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0 <br />STL, a State of California certified and USACE validated laboratory, analyzed soil <br />samples collected during this tank removal project. All soil samples were analyzed for total <br />petroleum hydrocarbons as diesel (TPH-D) using EPA Method 8015B LUFT, and for BTEX and <br />MTBE using EPA Method 8021B. <br />Soil samples collected during the tank removal from underneath the pipeline locations <br />(PL -1 and PL -2), samples collected from under the hold down slab (T-1 (SE), T-2 (SE center), <br />T-3 (NE), T-4 (SW), T-5 (SW center) and T-6 (NW)), and samples collected from the stockpile <br />soil/pea-gravel mix (SP -1 (W), SP -2 (E), SP -3 (W), SP -4 (E), SP -5 (E) and SP -6 (W)) did not <br />contain TPH-D, BTEX, or MTBE above laboratory method detection limits. Unknown <br />hydrocarbons in the CIO to C24 range (i.e., diesel range) were detected in soil samples SP -1 (W), <br />0 SP -2 (E), SP -4 (E), SP -5 (E) and SP -6 (W) at concentrations ranging from 12 to 21 mg/kg. The <br />concentration of unknown hydrocarbons in SP -3 (W) was below the laboratory method detection <br />limit. These unknown hydrocarbon concentration levels are below the applicable action level of <br />1,000 mg/kg. Table 3 presents the laboratory analytical results of all samples. The complete <br />laboratory analytical reports along with chain of custodies are included in Appendix B. <br />IN <br />