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TABLE 7 RESULTS OF DUPLICATE AND TRIP BLANK ANALYSES,MARCH 2O23 26700 South Banta Road Tracy,California Absolute Primary Sample Duplicate Sample Difference Between Trip Primary Duplicate Collection Reporting Sample Reporting Sample Sample Blank Sample ID Sample ID Date Compound' Limit Result Limit Result RPD' Results3 Result MW-15 MW-15-DUP 3/17/2023 1,2-Dichloropropane 0.20 0.071 0.20 0.070 NA 0.00 <0.20 MW-15 MW-15-DUP 3/17/2023 Carbon tetrachloride 0.20 0.42 0.20 0.42 0.0 NA <0.20 MW-15 MW-15-DUP 3/17/2023 Chloroform 0.20 18 0.20 18 0.0 NA <0.20 MW-15 MW-15-DUP 3/17/2023 Toluene 0.20 <0.20 U 0.20 <0.20 U NA NA 0.0673 Notes 1.Only those compounds detected in at least one of the primary or duplicate samples are shown. 2.Relative Percent Difference(RPD)is calculatf RPD % = 2 S 1 x 100 S1 + Sz Where S1,is the sample concentration and S2 is the duplicate sample concentration. 3.The RPD is not applicable when the sample results are less than two times(organics)or five times(inorganics) the reporting limit.In those cases,duplicate results are acceptable when the absolute difference between the results is less than the reporting limit.When a compound was detected in one duplicate sample,but was not detected at or above the laboratory reporting limit in the other sample,then the results are acceptable when the absolute difference between the detected result and the reporting limit is less than the reporting limit. Abbreviations <=less than the reporting limit shown Ng/L=micrograms per liter dup=duplicate sample J=The result is an estimated quantity.The associated numerical value is the approximate concentration of the analyte in the sample. NA=not applicable U=The analyte was analyzed for,but was not detected above the level of the adjusted detection limit or quantitation limit,as appropriate. httpsjAvoodplc.sharepoint.com/teams/0lintracy/shared documents/general/03.0 docctrl/2021 biennial report/01_text/tcy 2021 biennial_text_rev.docx Pagel of 1