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ALS Enuironme ntal CERTIFICATE OF ANALYSIS CLIENT: GeoEngineers, Inc. DATE: 7/20/2021 1101 Fawcett Ave. S., Suite 200 ALS SDG#: EV21070056 Tacoma, WA 98402 WDOE ACCREDITATION: C601 CLIENT CONTACT: Jacob Letts CLIENT PROJECT: Smith St. Mill LABORATORY CONTROL SAMPLE RESULTS ALS Test Batch ID: 168076-Water by NWTPH-GX Prepared 07/16/21 00:00 SPIKE LIMITS ANALYSIS ANALYSIS BY SPIKED COMPOUND METHOD %REC RPD QUAL ADDED RESULT MIN MAX RPD DATE Gasoline-BS NWTPH-GX 83.6 500 418 66.5 122.7 07/17/21 KLS Gasoline-BSD NWTPH-GX 89.2 6 500 446 66.5 122.7 12 07/17/21 KLS SPIKE LIMITS ANALYSIS ANALYSIS BY SURROGATE METHOD %REC RPD QUAL ADDED RESULT MIN MAX RPD DATE TFT-BS NWTPH-GX 104 10.0 10.4 60 140 07/17/21 KLS TFT-BSD NWTPH-GX 105 10.0 10.5 60 140 07/17/21 KLS ALS Test Batch ID: 168161 -Water by NWTPH-DX Prepared 07/14/21 00:00 SPIKE LIMITS ANALYSIS ANALYSIS BY SPIKED COMPOUND METHOD %REC RPD QUAL ADDED RESULT MIN MAX RPD DATE Total Petroleum Hydrocarbon-Diesel- NWTPH-DX 97.6 6250 6100 67 125.2 07/18/21 JNF BS Total Petroleum Hydrocarbon-Diesel- NWTPH-DX 92.3 6 6250 5770 67 125.2 15.2 07/20/21 JNF BSD SPIKE LIMITS ANALYSIS ANALYSIS BY SURROGATE METHOD %REC RPD QUAL ADDED RESULT MIN MAX RPD DATE Pentacosane-BS NWTPH-DX 86.5 100 86.5 60 126 07/18/21 JNF Pentacosane-BSD NWTPH-DX 88A 100 88.4 60 126 07/20/21 JNF ALS Test Batch ID: 167974-Water by SW8260D Prepared 07/14/21 00:00 SPIKE LIMITS ANALYSIS ANALYSIS BY SPIKED COMPOUND METHOD %REC RPD QUAL ADDED RESULT MIN MAX RPD DATE Dichlorodifluoromethane(CFC-12)-BS SW8260D 156 Sol 10.0 15.6 50 150 07/14/21 DLC Dichlorodifluoromethane(CFC-12)-BSD SW8260D 157 1 Sol 10.0 15.7 50 150 25 07/14/21 DLC Chloromethane(Methyl Chloride)-BS SW8260D 128 10.0 12.8 50 150 07/14/21 DLC Chloromethane(Methyl Chloride)-BSD SW8260D 129 1 10.0 12.9 50 150 25 07/14/21 DLC Vinyl chloride-BS SW8260D 121 10.0 12.1 50 150 07/14/21 DLC Vinyl chloride-BSD SW8260D 120 1 10.0 12.0 50 150 25 07/14/21 DLC Bromomethane(Methyl Bromide)-BS SW8260D 105 10.0 10.5 50 150 07/14/21 DLC Bromomethane(Methyl Bromide)-BSD SW8260D 102 3 10.0 10.2 50 150 25 07/14/21 DLC Chloroethane-BS SW8260D 113 10.0 11.3 50 150 07/14/21 DLC Chloroethane-BSD SW8260D 111 2 10.0 11.1 50 150 25 07/14/21 DLC Carbon tetrachloride-BS SW8260D 110 10.0 11.0 50 150 07/14/21 DLC Carbon tetrachloride-BSD SW8260D 107 3 10.0 10.7 50 150 25 07/14/21 DLC Trichlorofluoromethane(CFC-11)-BS SW8260D 126 10.0 12.6 50 150 07/14/21 DLC Trichlorofluoromethane(CFC-11)-BSD SW8260D 122 3 10.0 12.2 50 150 25 07/14/21 DLC Carbon disulfide-BS SW8260D 109 10.0 10.9 50 150 07/14/21 DLC Carbon disulfide-BSD SW8260D 107 2 10.0 10.7 50 150 25 07/14/21 DLC Acetone-BS SW8260D 99.3 10.0 9.93 50 150 07/14/21 DLC Page 20 ADDRESS 8620 Holly Drive,Suite 100, Everett,WA 98208 1 PHONE 425-356-2600 425-356-2626 ALS Group USA,Corp dba ALS Environmental www.aisgiobal.com RIGHT SU1-UTIOf15 � t I-F t t rlEF