ARCHIVED REPORTS XR0009280 - Laserfiche WebLink

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""i4ccal recknccs lnc Page 8 Additional Site Characterization Work Plan Project No 724 2 June 27,2002 All non.-disposable sampling equipment will be decontaminated using a steam cleaner before and between uses The effectiveness of the decontamination procedure is ensured by ' using the following quality control measures • Disposable gloves will be used by the technician to collect all samples and will be ' changed with each sampling event • A bailer blank for each well may be collected prior to sampling by filling the decontaminated stainless steel bailer with water (provided by the laboratory) and then t filling a VOA vial (provided by the laboratory) using the same proceduies for actual sample collection Bailer blanks for each sample, along with a field blank (prepared from water provided by the laboratory poured into a VOA vial on site) may accompany the samples to the laboratory and serve as checks against cross contamination ' A chain of custody document, listing all samples collected, accompanies the samples from field to laboratory, thereby providing a means to track their movement and ensure their ' integrity All water purged from each monitoring well and not used as a sample, will be placed in a 55 gallon DOT approved container, properly labeled and stored on site until its proper disposition can be arranged ' 2.5.2 Groundwater Sample Analyses Groundwater samples from the new and existing wells will be submitted to Sherwood Labs ' of Hilmar, California (Department of Health Services Certification No 1400) for the following analyses ' • Benzene, toluene, ethylbenzene and xylene (BTEX), & MTBE by EPA method 5030/8020 • Gasoline range petroleum hydrocarbons (TPH-G)by EPA method 5030/8020 The detection limits for these compounds are listed below A Chain of Custody will be completed for all samples collected and tracked to ensure sample integrity Detection Limits BTEX MTBE TPH-G Water(µg/L) 03 2 50