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1 Job No. 4780201 • 7 <br /> 1 4.0 FIELD QUALITY ASSURANCE AND QUALITY CONTROL <br /> 1 All soil and groundwater sampling, sample handling, and sample storage will be <br /> conducted under the direction of EZC, Inc. and in accordance with regulatory <br /> 1 guidelines presented in EPA document SW-846. All laboratory analyses will be <br /> performed at a laboratory certified by the State of California to perform the <br /> 1 requested services. Upon request, duplicate samples or field split samples will <br /> 1 be provided to evaluate the variability of analytical results. <br /> 1 All equipment that contacts samples will be thoroughly cleaned prior to use on <br /> the site and between samplings. All non-disposable bailers will be steam- <br /> cleaned or washed with an anionic detergent solution (i.e., Liquinox or <br /> Alconox), rinsed with tap water, rinsed with distilled water, drained of excess <br /> 1 water, and air-dried or wiped dry with a clean towel. <br /> 1 All containers used in the collection of groundwater samples will be provided by <br /> the contract laboratory. <br /> 1 <br /> 1 <br /> 1 <br /> i <br /> 1 <br /> 1 <br /> 1 <br /> 1 <br /> 1 EC, Inc. April 4, 1997 <br />