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proiectNumber 1RNBKQ1 Se�ltember 18. 2002 In addition to routine laboratory calibration of analytical instruments with standards and blanks, the analyst is required to run duplicates and spikes on 10 percent of analyses to assure an added measure of reliability and precision. Accuracy is verified through the following: 1. U.S. EPA and State certification of results; 2. Participation in inter-laboratory round robin program; 3. "Blind" samples are submitted for analysis by the quality control officer on a weekly basis; these are prepared from National Bureau of Standards specifications of EPA reference standards; 4. Verification of results with an alternative method. 7.0 SITE SAFETY PLAN Appendix A contains a Site Safety Plan, which complies with Worker Right to Know Regulations and CCR Title 2. 8.0 LIMITATIONS AND REPORT CERTIFICATION E2C has prepared this Workplan in accordance with generally accepted standards of care existing in California at this time. It should be recognized that definition and evaluation of geologic conditions is a difficult and inexact science. Judgments leading to conclusions and recommendations are generally made with limited knowledge of subsurface conditions present. No warranty expressed or implied is made. This workplan has been prepared under the professional supervision of the registered professional whose seal and signature appear herein. The conclusions of this report are based solely on the Scope of Services outlined and the sources of information referenced in this report. Any additional information that becomes available concerning the Site should be submitted to E2C so that our conclusions may be reviewed and modified, if necessary. Prepared By: \r�`RE� �' Reviewed By: alb it Mark W. Clardy, R.G. #7055 s;. hilip G, Twin, R.G. #4779 Senior Geologist ATF �' ��, ::.� Principal Hydrogeologist OF CALIF 13 E•C Re;^ad.ar;cn. LLC