ARCHIVED REPORTS XR0011301 - Laserfiche WebLink

Home Browse Search

Geoioywaf?echnus inc Page 3 Groundwater Monitoring Report Project No 425 2 June 13, 1997 ' Extreme care was exercised while collecting samples to prevent agitation of the water contained in the bailer Water samples were transferred from the bailer into 40 ml VOA vials ' preserved with hydrochloric acid using a bottom emptying device which mininizes 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 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 i their movement and insure their integrity ■ 1.3 Laboratory Analyses Thesam roundwater les collected on January 17, 1997 were delivered to Sherwood Lab g P (Department of Health Services Certification No 1400), of Hilmar, California, for analysis The samples were analyzed using the following methods o EPA method 602 - BTEX and MTBE o EPA method 5030/8015(m) - TPH-Gasoline o EPA method 3510/8015(m) - TEPH-Diesel - for MW-3 only The detection limits for the above analyses are listed in Table 2 of Appendix A and the lab data is presented in Appendix B Confirmation of MTBE b method 8260 was not performed on this event, but will be on the Y next monitoring event 1.4 Free Product Removal ' Mr Teramshi removed the floating gasoline from MW-2 an a regular basis from November 1, 1996 through January 16, 1997 Refer to the field log in Appendix C A total of 30 plus 1 gallons of gasoline/water mix have been removed by hand bailing methods ' 2.0 FINDINGS AND DISCUSSION ' Floating product was observed in MW-2 (approximately 3/16 of an inch) during this sampling event The laboratory analytical data from this monitoring event shows that 1