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December 29, 2016 | Page 5 File No. 0504-119-00 TABLE 2. SUMMARY OF CHEMICAL ANALYTICAL RESULTS – SOIL (TPH) Sample Identification Date Sampled GRPH1 (mg/kg) DRPH2 (mg/kg) ORPH2 (mg/kg) Site-3: B-1 (4.5-4.75) 12/02/16 250 160 35 Site-3: B-2 (4.5-4.75) 12/02/16 46 17 <29 Site-3: B-3 (6.5-6.75) 12/02/16 <7.5 <12 <31 Site-3: B-4 (6-6.5) 12/02/16 <7.8 <13 <33 Site-3: B-5 (4.75-5) 12/02/16 0.64 <11 <28 Site-3: B-6 (8-8.25) 12/02/16 <5.8 <12 <29 Site-3: B-7 (6-6.25) 12/02/16 <8.2 <13 <33 MTCA Method A CUL3 30/1004 2,000 2,000 Notes: 1GRPH analyzed using Northwest Method NWTPH-Gx. 2DRPH analyzed using Northwest Method NWTPH-Dx. 3MTCA Method A CUL - Washington State Model Toxics Control Act Method A unrestricted land use cleanup level 4Cleanup level for gasoline-range petroleum hydrocarbons is 100 mg/kg if benzene is not detected and the total concentrations of ethylbenzene, toluene, and xylenes are less than 1 percent of the gasoline mixture; otherwise the cleanup level is 30 mg/kg. Bold - Analyte concentrations are greater than the laboratory method reporting limit. Yellow Highlight – Analyte concentrations exceeds MTCA Method A cleanup level. 5.2. Groundwater Chemical Analytical Results Four groundwater samples were submitted from the borings to TestAmerica for the chemical analyses described in “Section 3.0 Scope of Services.” TestAmerica’s laboratory report is included in Appendix B; chemical analytical results are summarized and compared to MTCA Method A cleanup levels for unrestricted land use in Summary of Chemical Analytical Results – Groundwater, Tables 3 and 4. GRPH, DRPH and ORPH concentrations exceeded the MTCA Method A cleanup level in the groundwater sample collected from boring B-1 groundwater. Although each groundwater sample collected from the other three temporary wells contained detectable concentrations of BTEXN, GRPH, DRPH and/or ORPH, none of those concentrations exceeded cleanup criteria.