ARCHIVED REPORTS XR0009279 - Laserfiche WebLink

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GeologualrecluucsInc 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 decontarmnation 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 falling a VOA vial (provided by the laboratory) using the same procedures 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 containination 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 o 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) 0 3 2 50