Laserfiche WebLink
i <br />{ <br /> The e sample vials are placed in an iced Cooler for delivery to aDHS-certified laboratory For <br /> analysis. Standard chain-of-custody procedures are followed. <br /> C.6.5 Blankfi <br /> In addition to the groundwater samples,a trip blank and a decontamination blank are analyzed <br /> during each sampling round. A 40-ml glass VOA bottle with a Teflon septum lid, filled with DI <br /> water at the laboratory,functions as a trip blank. This trip blah!.-travels with the sample kit from <br /> the laboratory to the facility and back to the laboratory again in the sample containing cooler. <br /> The blank is analyzed for the same parameters as the samples to indicate if the samples have <br /> been contaminated,from whatever source,during the trip from the site to the laboratory. <br /> A decontamination blank is prepared in the field during well sampling. After the first well is <br /> sampled,DI water is poured into the clean,rinsed sampling bailer that is to be used for sampling <br /> the next well. This DI water then is emptied, as a sample,into a preserved 40-m1 VOA bottle for <br /> analysis with the samples and trip blank. The decontamination blank indicates if any of the <br /> samples are contaminated from the sampling equipment or decontamination process. <br /> C.6.6 SamplC Anawis <br /> T All groundwater well samples, the trip blank, and the decontamination blank are analyzed by the <br /> laboratory according to Table 2 of the "Tri-Regional Recommendations"but typically for total <br /> petroleum hydrocarbons (TPH) by DHS-modified EPA Method 8015 and for the aromatic <br /> hydrocarbons benzene,toluene,xylenes,and ethylbenzene(BTXE) by DHS Method 8020. <br /> c67/97780/apc C-5 <br />