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O' McCAMPBELLANALYTICAL INC. 1534 Willow Pass Road, Pittsburg, CA 94565-1701 <br />W Telephone : 925-252-9262 Fax: 925-252-9269 <br />"When Quality Counts" http://www.mccampbell.com E-mail: main@mccampbell.com <br />June 16, 2020 <br />Fremouw Environmental Service, Inc. <br />RE: MAI WO# 1812236; Pick N Pull/Stockton Project, Metals data <br />Dear Anne Lozano, <br />Water sample "PNPS-01" (collected on 12/05/2018 per the COC) was manually <br />homogenized (shaken), a 50m1 portion was aliquoted then digested & analyzed in <br />accordance with EPA method 200.8 for Total (TTLC) CAM17 metals. EPA 200.8 was <br />used since it is our default method for water samples. EPA 200.8 is an equivalent method <br />to EPA 6020 under SW -846. Although the analytical page indicates >1% sediment <br />content in the header, this sampling container actually contained trace levels of sediment <br />per visual inspection since a Sediment Content note of "present" was indicated on the <br />Work Order Summary — see page 15 of 17 of the report. Had there been significant <br />sediment present in the received sampling container, an analytical descriptor "bl - <br />Aqueous sample that contains greater than —1 vol. % sediment" would have noted this <br />condition on the analytical results. <br />I hope that this information is helpful. <br />Regards, <br />Angela Rydelius <br />Laboratory Manager <br />McCampbell Analytical, Inc. <br />1534 Willow Pass Rd. <br />Pittsburg, CA 94565 <br />Toll Free Ph: 877-252-9262 <br />Ph: 925-252-9262 ext. 214 <br />angela@mccampbell.com <br />PNP0012757 <br />