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ENTHALPY <br /> �■■� A N A I V T 1 C A L <br /> Case Narrative <br /> Cornerstone Technologies Lab Job Number: 427167 <br /> 100 Oceangate Location: Sierra Building, Color Pigment <br /> Suite 410 Date Received: 04/15/20 <br /> Long Beach, CA 90802 <br /> Ryan Berlino <br /> This data package contains sample and QC results for three solid samples, requested for the above referenced project on <br /> 04/15/20. The samples were received cold and intact. <br /> Metals (EPA 60108 and EPA 7471A): <br /> High response was observed for mercury in the ICV analyzed 04/16/20 16:40; affected data was qualified with "b". Low <br /> recoveries were observed for arsenic and selenium in the MS/MSD of S-2 YELLOW 42 (lab#427167-002); the LCS was <br /> within limits. High RPD was observed for selenium; this analyte was not detected at or above the RL in the associated <br /> samples. High recovery was observed for mercury in the LCS for batch 244695; this analyte was not detected at or above <br /> the RL in the associated samples. No other analytical problems were encountered. <br /> 1 of 1 <br /> 3 of 13 <br />