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Pace Analytical Services,LLC <br /> laneAnalyficalo 1700 Elm Street-Suite 200 <br /> Minneapolis,MN 55414 <br /> www.pacelabs.com <br /> (612)607-1700 <br /> PROJECT NARRATIVE <br /> Project: 7036 French Camp CA-Lathrop In-Revised Report <br /> Pace Project No.: 10508446 <br /> Method: EPA 8015 Modified <br /> Description: 8015 GCS THC-Diesel <br /> Client: UPRR_Arcadis <br /> Date: March 20,2020 <br /> General Information: <br /> 17 samples were analyzed for EPA 8015 Modified. All samples were received in acceptable condition with any exceptions noted below <br /> or on the chain-of custody and/or the sample condition upon receipt form(SCUR)attached at the end of this report. <br /> Hold Time: <br /> The samples were analyzed within the method required hold times with any exceptions noted below. <br /> Sample Preparation: <br /> The samples were prepared in accordance with EPA 3550 Sonication with any exceptions noted below. <br /> Initial Calibrations(including MS Tune as applicable): <br /> All criteria were within method requirements with any exceptions noted below. <br /> Continuing Calibration: <br /> All criteria were within method requirements with any exceptions noted below. <br /> Surrogates: <br /> All surrogates were within QC limits with any exceptions noted below. <br /> QC Batch:659949 <br /> S4:Surrogate recovery not evaluated against control limits due to sample dilution. <br /> •MS (Lab ID:3541950) <br /> •n-Triacontane(S) <br /> •o-Terphenyl(S) <br /> •MSD (Lab ID:3541951) <br /> •n-Triacontane(S) <br /> •o-Terphenyl(S) <br /> •SS-1-22 (Lab ID: 10508446001) <br /> •n-Triacontane(S) <br /> •o-Terphenyl(S) <br /> •SS-4-12 (Lab ID: 10508446007) <br /> •n-Triacontane(S) <br /> •o-Terphenyl(S) <br /> •SS-5-14 (Lab ID: 10508446009) <br /> •n-Triacontane(S) <br /> •o-Terphenyl(S) <br /> •SS-6-14 (Lab ID: 10508446011) <br /> •n-Triacontane(S) <br /> •o-Terphenyl(S) <br /> •SS-7-17 (Lab ID: 10508446013) <br /> •n-Triacontane(S) <br /> •o-Terphenyl(S) <br /> Method Blank: <br /> All analytes were below the report limit in the method blank,where applicable,with any exceptions noted below. <br /> REPORT OF LABORATORY ANALYSIS <br /> This report shall not be reproduced,except in full, <br /> without the written consent of Pace Analytical Services,LLC. Page 6 of 39 <br />