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Case Narrative <br />CONDOR EARTH <br />21663 Brian Lane <br />Sonora, CA 95742 <br />John Lane <br />Lab Job <br />Number: <br />514395 <br />Project No:RIVERBACK CITY <br />DUMP <br />Location:Riverback City Dump <br />Date Received:08/20/24 <br />This data package contains sample and QC results for ten three-point soil composites, requested for the above <br />referenced project on 08/21/24. The samples were received cold and intact. <br />Report reissued 09.11.2024 with corrected sample IDs. <br />TPH-Extractables by GC (EPA 8015M): <br />No analytical problems were encountered. <br />Semivolatile Organics by GC/MS (EPA 8270C): <br />COMPOSITE DP9 (lab # 514395-036) was diluted due to the dark color of the sample extract. <br />No other analytical problems were encountered. <br />Semivolatile Organics by GC/MS SIM (EPA 8270C-SIM): <br />Responses exceeding the instrument's linear range were observed for nitrobenzene-d5, 2-fluorobiphenyl, and <br />terphenyl-d14 in many samples; affected data was qualified with "E". <br />COMPOSITE DP9 (lab # 514395-036) was diluted due to the dark color of the sample extract. <br />No other analytical problems were encountered. <br />PCBs (EPA 8082): <br />No analytical problems were encountered. <br />Metals (EPA 6010B and EPA 7471A): <br />Low recoveries were observed for antimony in the MS/MSD for batch 348642; the parent sample was not a project <br />sample, the LCS was within limits, and the associated RPD was within limits. <br />High recovery was observed for mercury in the MSD for batch 348741; the parent sample was not a project sample, <br />the LCS was within limits, the associated RPD was within limits, and this analyte was not detected at or above the RL <br />in the associated sample. <br />No other analytical problems were encountered. <br />pH of Solid Samples (EPA 9045C): <br />No analytical problems were encountered. <br />1 of 1 <br />4 of 76