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10 Tacoma Smelter Plume ResultsBush, Roed & Hitchings, Inc. 2009 Minor Avenue East Seattle, WA 98102-3513 Ph: 206.323.4144 Fx: 206.323.7135 www.brhinc.com Page 1 TACOMA SMELTER PLUME TEST RESULTS File Number: #18-102386-00-PC Project Address: 2200 SW 320th Street, Federal Way, WA Prepared by: Ted Dimof - Bush, Roed & Hitchings Date: March 18th, 2019 Attached is a summary of test results for the Tacoma Smelter Plume analysis. Soil sampling was performed by Bush, Roed, & Hitchings on December 10th, 2019 where samples S-1 through S- 22 where collected at 2200 SW 320th Street, Federal Way, WA. Sampling methods followed the “Tacoma Smelter Plume Model Remedies Guidance” dated June 2012. Samples were tested by AM Test inc., a professional analytical service. Based on the test results, elevated levels of arsenic and lead were not found at this site, therefore, cleanup will not be required. Below is a summary of the results: Description: Parameter: Results: Comments: Average Arsenic > 20 ppm 10.6 ppm Parameter not exceeded. Soil cleanup not required. Maximum Arsenic > 40 ppm 33.0 ppm Parameter not exceeded. Soil cleanup not required. Average Lead >250 ppm 28.1 ppm Parameter not exceeded. Soil cleanup not required. Maximum Lead > 500 ppm 97.4 ppm Parameter not exceeded. Soil cleanup not required. See attached for Form 1 & Form 2 from the “Tacoma Smelter Plume Model Remedies Guidance,” soil sampling site plan, and laboratory test results. Ted Dimof tedd@brhinc.com 206-323-4144 S-1 S-2 S-3 S-4A & S-4B S-5 S-6 S-7 S-8A & S-8B S-9 S-10 S-11 S-12A & S-12B S-13 S-14 S-15 S-16A & S-16B S-17 S-18 S-19 S-20 A & S-20 B S-21 S-22 S-22 S-22 S-22 S-22S-22 LEGEND: S-X DECISION UNIT INFORMATION: S-XX S-22 98102-3513BUSH, ROED & HITCHINGS, INC.2009 MINOR AVE. EASTSEATTLE, WashingtonLAND SURVEYORS & CIVIL ENGINEERSFAX# (206) 323-7135(206) 323-41441-800-935-0508SOIL SAMPLING GRID2200 SW 320TH ST SKYLINE PROPERTIES INC.FEDERAL WAYKING COUNTYWASCALE IN FEET 0 20 1"=20' 20 10 40 Am Test Inc. 13600 NE 126TH PL Suite C Kirkland, WA 98034 (425) 885-1664 www.amtestlab.com Professional Analytical Services ANALYSIS REPORT BUSH, ROED, & HITCHINGS, INC Date Received: 12/10/18 2009 MINOR AVE E Date Reported: 12/28/18 SEATTLE, WA 98102 Attention: TED DIMOF Project Name: 2200 SW 320TH ST, FEDERAL WAY, WA Project #: 2018224 All results reported on an as received basis. _________________________________________________________________________________________________ AMTEST Identification Number 18-A021801 Client Identification S-1 Sampling Date 12/10/18, 07:54 Total Metals PARAMETER RESULT UNITS Q D.L. METHOD ANALYST DATE Acid Digestion Y SW-846 3050B KQ 12/19/18 Arsenic 14.2 ug/g 0.13 EPA 6010D KQ 12/27/18 Lead 97.4 ug/g 0.26 EPA 6010D KQ 12/27/18 BUSH, ROED, & HITCHINGS, INC Project Name: 2200 SW 320TH ST, FEDERAL WAY, WA AmTest ID: 18-A021802 _________________________________________________________________________________________________ AMTEST Identification Number 18-A021802 Client Identification S-2 Sampling Date 12/10/18, 08:09 Total Metals PARAMETER RESULT UNITS Q D.L. METHOD ANALYST DATE Acid Digestion Y SW-846 3050B KQ 12/19/18 Arsenic 11.7 ug/g 0.12 EPA 6010D KQ 12/27/18 Lead 22.0 ug/g 0.24 EPA 6010D KQ 12/27/18 _________________________________________________________________________________________________ AMTEST Identification Number 18-A021803 Client Identification S-3 Sampling Date 12/10/18, 09:51 Total Metals PARAMETER RESULT UNITS Q D.L. METHOD ANALYST DATE Acid Digestion Y SW-846 3050B KQ 12/19/18 Arsenic 8.63 ug/g 0.12 EPA 6010D KQ 12/27/18 Lead 17.9 ug/g 0.24 EPA 6010D KQ 12/27/18 BUSH, ROED, & HITCHINGS, INC Project Name: 2200 SW 320TH ST, FEDERAL WAY, WA AmTest ID: 18-A021804 _________________________________________________________________________________________________ AMTEST Identification Number 18-A021804 Client Identification S-4A Sampling Date 12/10/18, 08:28 Total Metals PARAMETER RESULT UNITS Q D.L. METHOD ANALYST DATE Acid Digestion Y SW-846 3050B KQ 12/19/18 Arsenic 15.5 ug/g 0.12 EPA 6010D KQ 12/27/18 Lead 15.7 ug/g 0.24 EPA 6010D KQ 12/27/18 _________________________________________________________________________________________________ AMTEST Identification Number 18-A021805 Client Identification S-4B Sampling Date 12/10/18, 08:28 Total Metals PARAMETER RESULT UNITS Q D.L. METHOD ANALYST DATE Acid Digestion Y SW-846 3050B KQ 12/19/18 Arsenic 16.1 ug/g 0.12 EPA 6010D KQ 12/27/18 Lead 18.1 ug/g 0.25 EPA 6010D KQ 12/27/18 BUSH, ROED, & HITCHINGS, INC Project Name: 2200 SW 320TH ST, FEDERAL WAY, WA AmTest ID: 18-A021806 _________________________________________________________________________________________________ AMTEST Identification Number 18-A021806 Client Identification S-5 Sampling Date 12/10/18, 09:30 Total Metals PARAMETER RESULT UNITS Q D.L. METHOD ANALYST DATE Acid Digestion Y SW-846 3050B KQ 12/19/18 Arsenic 13.0 ug/g 0.12 EPA 6010D KQ 12/27/18 Lead 24.1 ug/g 0.25 EPA 6010D KQ 12/27/18 _________________________________________________________________________________________________ AMTEST Identification Number 18-A021807 Client Identification S-6 Sampling Date 12/10/18, 09:51 Total Metals PARAMETER RESULT UNITS Q D.L. METHOD ANALYST DATE Acid Digestion Y SW-846 3050B KQ 12/19/18 Arsenic 33.0 ug/g 0.12 EPA 6010D KQ 12/27/18 Lead 58.8 ug/g 0.25 EPA 6010D KQ 12/27/18 BUSH, ROED, & HITCHINGS, INC Project Name: 2200 SW 320TH ST, FEDERAL WAY, WA AmTest ID: 18-A021808 _________________________________________________________________________________________________ AMTEST Identification Number 18-A021808 Client Identification S-7 Sampling Date 12/10/18, 08:28 Total Metals PARAMETER RESULT UNITS Q D.L. METHOD ANALYST DATE Acid Digestion Y SW-846 3050B KQ 12/19/18 Arsenic 8.49 ug/g 0.13 EPA 6010D KQ 12/27/18 Lead 24.2 ug/g 0.25 EPA 6010D KQ 12/27/18 _________________________________________________________________________________________________ AMTEST Identification Number 18-A021809 Client Identification S-8A Sampling Date 12/10/18, 09:30 Total Metals PARAMETER RESULT UNITS Q D.L. METHOD ANALYST DATE Acid Digestion Y SW-846 3050B KQ 12/19/18 Arsenic 9.84 ug/g 0.12 EPA 6010D KQ 12/27/18 Lead 22.0 ug/g 0.25 EPA 6010D KQ 12/27/18 BUSH, ROED, & HITCHINGS, INC Project Name: 2200 SW 320TH ST, FEDERAL WAY, WA AmTest ID: 18-A021810 _________________________________________________________________________________________________ AMTEST Identification Number 18-A021810 Client Identification S-8B Sampling Date 12/10/18, 09:30 Total Metals PARAMETER RESULT UNITS Q D.L. METHOD ANALYST DATE Acid Digestion Y SW-846 3050B KQ 12/19/18 Arsenic 9.18 ug/g 0.12 EPA 6010D KQ 12/27/18 Lead 16.7 ug/g 0.24 EPA 6010D KQ 12/27/18 _________________________________________________________________________________________________ AMTEST Identification Number 18-A021811 Client Identification S-9 Sampling Date 12/10/18, 10:02 Total Metals PARAMETER RESULT UNITS Q D.L. METHOD ANALYST DATE Acid Digestion Y SW-846 3050B KQ 12/19/18 Arsenic 9.05 ug/g 0.12 EPA 6010D KQ 12/27/18 Lead 26.0 ug/g 0.25 EPA 6010D KQ 12/27/18 BUSH, ROED, & HITCHINGS, INC Project Name: 2200 SW 320TH ST, FEDERAL WAY, WA AmTest ID: 18-A021812 _________________________________________________________________________________________________ AMTEST Identification Number 18-A021812 Client Identification S-10 Sampling Date 12/10/18, 08:41 Total Metals PARAMETER RESULT UNITS Q D.L. METHOD ANALYST DATE Acid Digestion Y SW-846 3050B KQ 12/19/18 Arsenic 11.3 ug/g 0.12 EPA 6010D KQ 12/27/18 Lead 16.5 ug/g 0.24 EPA 6010D KQ 12/27/18 _________________________________________________________________________________________________ AMTEST Identification Number 18-A021813 Client Identification S-11 Sampling Date 12/10/18, 09:24 Total Metals PARAMETER RESULT UNITS Q D.L. METHOD ANALYST DATE Acid Digestion Y SW-846 3050B KQ 12/19/18 Arsenic 12.6 ug/g 0.12 EPA 6010D KQ 12/27/18 Lead 26.5 ug/g 0.24 EPA 6010D KQ 12/27/18 BUSH, ROED, & HITCHINGS, INC Project Name: 2200 SW 320TH ST, FEDERAL WAY, WA AmTest ID: 18-A021814 _________________________________________________________________________________________________ AMTEST Identification Number 18-A021814 Client Identification S-12A Sampling Date 12/10/18, 10:02 Total Metals PARAMETER RESULT UNITS Q D.L. METHOD ANALYST DATE Acid Digestion Y SW-846 3050B KQ 12/19/18 Arsenic 12.0 ug/g 0.12 EPA 6010D KQ 12/27/18 Lead 29.2 ug/g 0.24 EPA 6010D KQ 12/27/18 _________________________________________________________________________________________________ AMTEST Identification Number 18-A021815 Client Identification S-12B Sampling Date 12/10/18, 10:02 Total Metals PARAMETER RESULT UNITS Q D.L. METHOD ANALYST DATE Acid Digestion Y SW-846 3050B KQ 12/19/18 Arsenic 10.2 ug/g 0.12 EPA 6010D KQ 12/27/18 Lead 26.7 ug/g 0.25 EPA 6010D KQ 12/27/18 BUSH, ROED, & HITCHINGS, INC Project Name: 2200 SW 320TH ST, FEDERAL WAY, WA AmTest ID: 18-A021816 _________________________________________________________________________________________________ AMTEST Identification Number 18-A021816 Client Identification S-13 Sampling Date 12/10/18, 10:30 Total Metals PARAMETER RESULT UNITS Q D.L. METHOD ANALYST DATE Acid Digestion Y SW-846 3050B KQ 12/19/18 Arsenic 10.6 ug/g 0.12 EPA 6010D KQ 12/27/18 Lead 18.6 ug/g 0.25 EPA 6010D KQ 12/27/18 _________________________________________________________________________________________________ AMTEST Identification Number 18-A021817 Client Identification S-14 Sampling Date 12/10/18, 08:41 Total Metals PARAMETER RESULT UNITS Q D.L. METHOD ANALYST DATE Acid Digestion Y SW-846 3050B KQ 12/19/18 Arsenic 14.4 ug/g 0.12 EPA 6010D KQ 12/27/18 Lead 26.2 ug/g 0.25 EPA 6010D KQ 12/27/18 BUSH, ROED, & HITCHINGS, INC Project Name: 2200 SW 320TH ST, FEDERAL WAY, WA AmTest ID: 18-A021818 _________________________________________________________________________________________________ AMTEST Identification Number 18-A021818 Client Identification S-15 Sampling Date 12/10/18, 09:28 Total Metals PARAMETER RESULT UNITS Q D.L. METHOD ANALYST DATE Acid Digestion Y SW-846 3050B KQ 12/19/18 Arsenic 8.54 ug/g 0.12 EPA 6010D KQ 12/27/18 Lead 36.7 ug/g 0.24 EPA 6010D KQ 12/27/18 _________________________________________________________________________________________________ AMTEST Identification Number 18-A021819 Client Identification S-16A Sampling Date 12/10/18, 10:18 Total Metals PARAMETER RESULT UNITS Q D.L. METHOD ANALYST DATE Acid Digestion Y SW-846 3050B KQ 12/19/18 Arsenic 4.11 ug/g 0.12 EPA 6010D KQ 12/27/18 Lead 13.2 ug/g 0.25 EPA 6010D KQ 12/27/18 BUSH, ROED, & HITCHINGS, INC Project Name: 2200 SW 320TH ST, FEDERAL WAY, WA AmTest ID: 18-A021820 _________________________________________________________________________________________________ AMTEST Identification Number 18-A021820 Client Identification S-16B Sampling Date 12/10/18, 10:18 Total Metals PARAMETER RESULT UNITS Q D.L. METHOD ANALYST DATE Acid Digestion Y SW-846 3050B KQ 12/19/18 Arsenic 4.69 ug/g 0.13 EPA 6010D KQ 12/27/18 Lead 10.7 ug/g 0.25 EPA 6010D KQ 12/27/18 _________________________________________________________________________________________________ AMTEST Identification Number 18-A021821 Client Identification S-17 Sampling Date 12/10/18, 10:26 Total Metals PARAMETER RESULT UNITS Q D.L. METHOD ANALYST DATE Acid Digestion Y SW-846 3050B KQ 12/19/18 Arsenic 2.64 ug/g 0.13 EPA 6010D KQ 12/27/18 Lead 5.82 ug/g 0.25 EPA 6010D KQ 12/27/18 BUSH, ROED, & HITCHINGS, INC Project Name: 2200 SW 320TH ST, FEDERAL WAY, WA AmTest ID: 18-A021822 _________________________________________________________________________________________________ AMTEST Identification Number 18-A021822 Client Identification S-18 Sampling Date 12/10/18, 08:56 Total Metals PARAMETER RESULT UNITS Q D.L. METHOD ANALYST DATE Acid Digestion Y SW-846 3050B KQ 12/19/18 Arsenic 8.98 ug/g 0.13 EPA 6010D KQ 12/27/18 Lead 55.7 ug/g 0.25 EPA 6010D KQ 12/27/18 _________________________________________________________________________________________________ AMTEST Identification Number 18-A021823 Client Identification S-19 Sampling Date 12/10/18, 09:08 Total Metals PARAMETER RESULT UNITS Q D.L. METHOD ANALYST DATE Acid Digestion Y SW-846 3050B KQ 12/19/18 Arsenic 10.8 ug/g 0.12 EPA 6010D KQ 12/27/18 Lead 40.5 ug/g 0.24 EPA 6010D KQ 12/27/18 BUSH, ROED, & HITCHINGS, INC Project Name: 2200 SW 320TH ST, FEDERAL WAY, WA AmTest ID: 18-A021824 _________________________________________________________________________________________________ AMTEST Identification Number 18-A021824 Client Identification S-20A Sampling Date 12/10/18, 10:18 Total Metals PARAMETER RESULT UNITS Q D.L. METHOD ANALYST DATE Acid Digestion Y SW-846 3050B KQ 12/19/18 Arsenic 3.07 ug/g 0.12 EPA 6010D KQ 12/27/18 Lead 7.76 ug/g 0.24 EPA 6010D KQ 12/27/18 _________________________________________________________________________________________________ AMTEST Identification Number 18-A021825 Client Identification S-20B Sampling Date 12/10/18, 10:18 Total Metals PARAMETER RESULT UNITS Q D.L. METHOD ANALYST DATE Acid Digestion Y SW-846 3050B KQ 12/19/18 Arsenic 2.52 ug/g 0.12 EPA 6010D KQ 12/27/18 Lead 7.30 ug/g 0.24 EPA 6010D KQ 12/27/18 BUSH, ROED, & HITCHINGS, INC Project Name: 2200 SW 320TH ST, FEDERAL WAY, WA AmTest ID: 18-A021826 _________________________________________________________________________________________________ AMTEST Identification Number 18-A021826 Client Identification S-21 Sampling Date 12/10/18, 10:26 Total Metals PARAMETER RESULT UNITS Q D.L. METHOD ANALYST DATE Acid Digestion Y SW-846 3050B KQ 12/19/18 Arsenic 7.80 ug/g 0.12 EPA 6010D KQ 12/27/18 Lead 25.9 ug/g 0.25 EPA 6010D KQ 12/27/18 _________________________________________________________________________________________________ AMTEST Identification Number 18-A021827 Client Identification S-22 Sampling Date 12/10/18, 09:15 Total Metals PARAMETER RESULT UNITS Q D.L. METHOD ANALYST DATE Acid Digestion Y SW-846 3050B KQ 12/19/18 Arsenic 12.9 ug/g 0.12 EPA 6010D KQ 12/27/18 Lead 68.9 ug/g 0.24 EPA 6010D KQ 12/27/18 _________________________________ Kathy Fugiel President Am Test Inc. 13600 NE 126th PL Suite C Kirkland, WA, 98034 (425) 885-1664 www.amtestlab.com Professional Analytical Services QC Summary for sample numbers: 18-A021801 to 18-A021827 DUPLICATES SAMPLE # ANALYTE UNITS SAMPLE VALUE DUP VALUE RPD 18-A021810 Arsenic ug/g 9.18 9.28 1.1 18-A021820 Arsenic ug/g 4.69 5.30 12. 18-A021745 Lead ug/g 2.65 1.79 39. 18-A021755 Lead ug/g 9.10 8.05 12. 18-A021763 Lead ug/g 3.52 2.68 27. 18-A021810 Lead ug/g 16.7 17.0 1.8 18-A021820 Lead ug/g 10.7 11.1 3.7 MATRIX SPIKES SAMPLE # ANALYTE UNITS SAMPLE VALUE SMPL+ SPK SPK AMT RECOVERY 18-A021810 Arsenic ug/g 9.18 31.7 24.0 93.83 % 18-A021820 Arsenic ug/g 4.69 26.9 25.0 88.84 % 18-A021745 Lead ug/g 2.65 39.2 32.0 114.22 % 18-A021755 Lead ug/g 9.10 49.7 42.0 96.67 % 18-A021763 Lead ug/g 3.52 49.1 42.0 108.52 % 18-A021810 Lead ug/g 16.7 36.6 24.0 82.92 % 18-A021820 Lead ug/g 10.7 27.9 25.0 68.80 % STANDARD REFERENCE MATERIALS ANALYTE UNITS TRUE VALUE MEASURED VALUE RECOVERY Arsenic ug/g 2.00 2.07 104. % Lead ug/g 0.80 0.77 96.2 % BLANKS ANALYTE UNITS RESULT Arsenic ug/g < 0.5 Lead ug/g < 1