ARCHIVED REPORTS XR0009779 - Laserfiche WebLink

Home Browse Search

Bank of Stockton Page 3 ' Wmter 1996 Quarterly Monitoring Report Project No 358 2 April 8,1996 ' collecting it in a VOA vial) prior to collecting the analytical sample Before and m between uses, all sampling equipment was washed using a portable hot water cleaner. Extreme care was exercised while collecting samples toP agitation revent talion of the water contained in the bailer Water samples were transferred from the bailer into 40 ml VOA vials preserved with hydrochloric acid and 1 liter capacity amber glass bottles (provided by the analytical laboratory) using a bottom emptying device which mi in zes sample aeration during transfer of the ' sample All samples were checked for head space bubbles, labeled, inserted into foam holders and placed in an ice chest cooled to 4°C for transport to the ' laboratory Disposable gloves were worn by the sampling technician while collecting all ' samples. The gloves were changed between wells to reduce the potential for cross-contamination. A chain of custody document, listing all samples collected and their intended analyses, accompanied the samples from field to the laboratory, thereby providing a means to track their movement and insure their integrity. 1.4 Laboratory Analyses The groundwater samples obtained March 28, 1996 were delivered to Sherwood Lab (Department of Health Services Certification No. 1400), of Hilmar, California, for analyses These samples were stored overnight in a secure Del Tech refrigerator and relinquished to the Sherwood courser the following day, March 29, 1996 The samples were analyzed using the following methods • method 602 - benzene, toluene, ethvibenzene, total xylenes (BTEX); • method 8015m/LUFT- total volatile hydrocarbons as gasoline (TPH- IGasoline), • method 8015m/LUFT- total extractable petroleum hydrocarbons (TEPH); ' The detection limits for the above analyses are listed in Table 2 of Appendix B.