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ALS Enuironme ntal <br /> CERTIFICATE OF ANALYSIS <br /> CLIENT: GeoEngineers, Inc. DATE: 4/14/2021 <br /> 1101 Fawcett Ave. S., Suite 200 ALS SDG#: EV21040032 <br /> Tacoma, WA 98402 WDOE ACCREDITATION: C601 <br /> CLIENT CONTACT: Jacob Letts <br /> CLIENT PROJECT: Smith St. Mill <br /> LABORATORY CONTROL SAMPLE RESULTS <br /> SPIKE LIMITS ANALYSIS ANALYSIS BY <br /> SPIKED COMPOUND METHOD %REC RPD QUAL ADDED RESULT MIN MAX RPD DATE <br /> 1,2,3-Trichlorobenzene-BSD SW8260D 93.3 5 10.0 9.33 50 150 25 04/08/21 DLC <br /> SPIKE LIMITS ANALYSIS ANALYSIS BY <br /> SURROGATE METHOD %REC RPD QUAL ADDED RESULT MIN MAX RPD DATE <br /> 1,2-Dichloroethane-d4-BS SW8260D 100 20.0 20.0 71 130 04/08/21 DLC <br /> 1,2-Dichloroethane-d4-BSD SW8260D 101 20.0 20.2 71 130 04/08/21 DLC <br /> Toluene-D8-BS SW8260D 109 20.0 21.8 80 120 04/08/21 DLC <br /> Toluene-D8-BSD SW8260D 110 20.0 22.0 80 120 04/08/21 DLC <br /> p-Bromofluorobenzene-BS SW8260D 98.5 20.0 19.7 78 120 04/08/21 DLC <br /> p-Bromofluorobenzene-BSD SW8260D 101 20.0 20.1 78 120 04/08/21 DLC <br /> ALS Test Batch ID: 164451 -Water by E200.8 Prepared 04/08/21 00:00 <br /> SPIKE LIMITS ANALYSIS ANALYSIS BY <br /> SPIKED COMPOUND METHOD %REC RPD QUAL ADDED RESULT MIN MAX RPD DATE <br /> Arsenic-BS E200.8 94.7 125 118 89.1 110 04/08/21 EBS <br /> Arsenic-BSD E200.8 97.1 2 125 121 89.1 110 10 04/08/21 EBS <br /> Chromium-BS E200.8 99.4 125 124 88.3 110.2 04/08/21 EBS <br /> Chromium-BSD E200.8 102 2 125 127 88.3 110.2 10 04/08/21 EBS <br /> Lead-BS E200.8 100 125 126 87.5 107 04/08/21 EBS <br /> Lead-BSD E200.8 99.2 1 125 124 87.5 107 10 04/08/21 EBS <br /> ALS Test Batch ID: 164460-Water by E200.8 Prepared 04/08/21 00:00 <br /> SPIKE LIMITS ANALYSIS ANALYSIS BY <br /> SPIKED COMPOUND METHOD %REC RPD QUAL ADDED RESULT MIN MAX RPD DATE <br /> Arsenic(Dissolved)-BS E200.8 94.7 125 118 89.1 110 04/08/21 EBS <br /> Arsenic(Dissolved)-BSD E200.8 97.1 2 125 121 89.1 110 10 04/08/21 EBS <br /> Chromium(Dissolved)-BS E200.8 99.4 125 124 86.2 107 04/08/21 EBS <br /> Chromium(Dissolved)-BSD E200.8 102 2 125 127 86.2 107 2.97 04/08/21 EBS <br /> Lead(Dissolved)-BS E200.8 100 125 126 87.5 107 04/08/21 EBS <br /> Lead(Dissolved)-BSD E200.8 99.2 1 125 124 87.5 107 2.43 04/08/21 EBS <br /> APPROVED BY <br /> Laboratory Director <br /> Page 24 <br /> ADDRESS 8620 Holly Drive,Suite 100, Everett,WA 98208 1 PHONE 425-356-2600 1 FAX 425-356-2626 <br /> ALS Group USA,Corp dba ALS Environmental <br /> www.aisgiobal.com <br /> RIGHT SU1-UTIOf15 � t I-F t t rlEF <br />