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CALIFORNIA LABORATORY SERVICES <br />Committed. Responsive. Flexible. <br />February 17, 2022 CIS Work Order #: 2260827 <br />COC #: <br />Jonathan HV Lee <br />Precision Enviro-Tech <br />3935 N. Coronado Ave <br />Stockton, CA 95204 <br />Project Name: 2020807 <br />Enclosed are the results of analyses for samples received by the laboratory on 02/10/22 <br />14:15. Samples were analyzed pursuant to client request utilizing EPA or other ELAP <br />approved methodologies. I certify that the results are in compliance both technically and <br />for completeness. <br />Analytical results are attached to this letter. Please call if we can provide additional <br />assistance. <br />Sincerely, <br />James Liang, Ph.D. <br />Laboratory Director <br />CA SWRCB ELAP Accreditation/Registration number 1233