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June 29, 2017 | Page 5 File No. 0504-119-00 quarters (assuming contaminant concentrations are not detected greater than MTCA cleanup levels) to obtain a data set spanning four consecutive quarters. 7.0 LIMITATIONS We have prepared this report for the exclusive use of Ecology and their authorized agents. Within the limitations of scope, schedule and budget, our services have been executed in accordance with generally accepted environmental science practices in this area at the time this report was prepared. The conclusions and opinions presented in this report are based on our professional knowledge, judgment and experience. No warranty or other conditions, express or implied, should be understood. Any electronic form, facsimile or hard copy of the original document (email, text, table and/or figure), if provided, and any attachments should be considered a copy of the original document. The original document is stored by GeoEngineers, Inc. and will serve as the official document of record. Please refer to “Report Limitations and Guidelines for Use,” Appendix C, for additional information pertaining to use of this report. 8.0 REFERENCES GeoEngineers, Inc. 2016. “Data Gap Investigation.” GEI No. December 16, 2016. GeoEngineers, Inc. 2017. “Supplemental Data Gap Investigation.” GEI No. June 26, 2017. Puls, R. W. and M.J. Barcelona. 1996. “Low-flow (Minimal Drawdown) Ground-water Sampling Procedures.” EPA Ground Water Issue. April. p.1-9. TerraGraphics Environmental Engineering, Inc., 2014. Limited Phase II Environmental Site Assessment Report, Lower County Shop, Ellensburg, Washington, prepared for U.S. Environmental Protection Agency. April 11, 2014. U.S. Environmental Protection Agency, Region 1. “Low Stress (Low-Flow) Purging and Sampling Procedure for the Collection of Groundwater Samples from Monitoring Wells.” EPA SOP No. GW 01, Revised January 19, 2010.