3003 COLBY AVE COURTYARD BY MARRIOTT 2021-03-09

I Proposed Everett Hotel Property Environmental Site Characterization and IEverett, Washington Remediation Recommendations Table 2 ISummary of Field Screening Results I Approximate Depth Range of Elevated PID Measurements and/or Range of PID Measurements Boring ID Petroleum Odors Over Impacted Depth I EB-1 None Observed All Measurements at Background EB 2 None Observed All Measurements at Background EB-3 None Observed All Measurements at Background EB-4 None Observed All Measurements at Background EB-5 17.5 to 37.5 Ito 111 EB-6 None Observed All Measurements at Background I EB-7 5 to 35 26 to 1,252 �' EB-8 None Observed All Measurements at Background EB-9 None Observed All Measurements at Background I EB-10 EB 1120 to 30 22 to 65 All Measurements `' ' None Observed at Background EB-12 None Observed All Measurements at Background I The PID field-screening results are included on the exploration logs in Appendix A. I2.2.2 Analytical Laboratory Testing ISoil Sampling and Testing Selected soil samples collected from each of the borings were submitted for analytical Ilaboratory testing. At least one sample was tested from each of the borings, but up to five samples were tested from borings where field screening results indicated the presence of Ipetroleum hydrocarbons. All downhole sampling tools were decontaminated prior to use at the site by steam cleaning. I Additional decontamination of the split spoon samplers was conducted between sampling intervals by scrubbing the samplers with a stiff brush in a detergent solution followed by rinsing in clean, potable water. Samples selected for laboratory analysis were transferred from I the split spoon samplers directly into laboratory prepared glass sample jars in preparation for laboratory analysis. These samples were then placed immediately into a chilled cooler and subsequently transported to our subcontracted laboratory for analysis. Chain-of-custody Iprocedures were maintained during transportation to document sample integrity. I During our initial study in January 2009, each of the selected soil samples was tested for gasoline-range total petroleum hydrocarbons (TPH) by State Method NWTPH-Gx, for diesel- and motor-oil-range TPH by State Method NWTPH-Dx, and for benzene, toluene, ethylbenzene I August 24, 2009 ASSOCIATED EARTH SCIENCES, INC. ITJP/tb-KV090168A5-Projects120090168IKVIWP Page 7