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June 29, 2017 | Page 4 File No. 0504-119-00 <br />TABLE 2. SUMMARY OF CHEMICAL ANALYTICAL RESULTS <br />Sample <br />Number <br />Petroleum- Range <br />Hydrocarbons Volatile Organic Compounds (µg/L)4 GRPH2 (µg/L) DRPH3 (mg/L) ORPH3 (mg/L) Benzene Toluene Ethyl- benzene o-Xylene m,p-Xylenes3 Total Xylenes3 MTBE MW-1:033117 <150 <0.25 <0.42 <0.40 <1.0 <1.0 <1.0 <2.0 <3.0 <1.0 <br />MW-1:051217 <150 <0.25 <0.41 <0.40 <1.0 <1.0 <1.0 <2.0 <3.0 <1.0 <br />MW-2:033117 490 <0.26 <0.43 1.5 <1.0 3.3 <1.0 4.6 5.4 <1.0 <br />MW-2:051217 200 <0.25 <0.42 <0.40 <1.0 <1.0 <1.0 <2.0 <3.0 <1.0 <br />MW-3:033117 <150 <0.25 <0.42 <0.40 <1.0 <1.0 <1.0 <2.0 <3.0 <1.0 <br />MW-3:051217 <150 <0.25 <0.42 <0.40 <1.0 <1.0 <1.0 <2.0 <3.0 <1.0 <br />DUP:051217 <150 <0.25 <0.41 <0.40 <1.0 <1.0 <1.0 <2.0 <3.0 <1.0 <br />MW-4:033117 <150 <0.25 <0.41 <0.40 <1.0 <1.0 <1.0 <2.0 <3.0 <1.0 <br />MW-4:051217 <150 <0.25 <0.41 <0.40 <1.0 <1.0 <1.0 <2.0 <3.0 <1.0 <br />MW-5:033117 <150 <0.25 <0.42 <0.40 <1.0 <1.0 <1.0 <2.0 <3.0 <1.0 <br />MW-5:051217 <150 <0.25 <0.41 <0.40 <1.0 <1.0 <1.0 <2.0 <3.0 <1.0 <br />MW-6:033117 <150 <0.25 <0.42 <0.40 <1.0 <1.0 <1.0 <2.0 <3.0 <1.0 <br />MW-6:051217 <150 <0.25 <0.41 <0.40 <1.0 <1.0 <1.0 <2.0 <3.0 <1.0 <br />MTCA Method <br />A Cleanup <br />Levels <br />1000/8004 0.500 0.500 5 1,000 700 1,0006 20 <br />Notes: <br />1Chemical analyses completed by TestAmerica Laboratories, Inc. located in Spokane Valley, Washington. <br />2GRPH were analyzed by Northwest Method NWTPH-Gx. <br />3DRPH and ORPH were analyzed by Northwest Method NWTPH-Dx <br />4BTEX and MTBE were analyzed by EPA 8260. <br />5Cleanup level for gasoline-range petroleum hydrocarbons is 1,000 µg/L if benzene is not detected; otherwise the cleanup level is <br />800 µg/L. <br />6Cleanup level for total xylenes (o-xylene and m,p-xylene) is 1,000 µg/L. Concentrations were summed to determine compliance. <br />µg/L = micrograms per liter <br />Bold indicates the contaminant was detected at a concentration greater than the laboratory reporting limits. <br />6.0 SUMMARY, CONCLUSIONS AND RECOMMENDATIONS <br />Groundwater monitoring was conducted on May 12, 2017 at the Kittitas County Shop located at <br />505 West 14th Avenue in Ellensburg, Washington. Six groundwater samples collected from monitoring wells <br />MW-1 through MW-6 were submitted for GRPH, BTEX, MTBE, DRPH and ORPH analysis. GRPH was detected <br />in the groundwater sample collected from monitoring well MW-2 at concentrations less than the MTCA <br />Method A cleanup level. We recommend continuing groundwater monitoring for at least two additional