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u -B <br /> f <br /> { <br /> -� The sample vials are placed in an iced cooler for delivery to a DHS-certified laboratory for <br /> analysis. Standard chain-of-custody procedures are followed. <br /> A.G.S Blanks <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 /> wafer at the laboratory,functioi►s as a trip blank. This trip blank travels with the sample kit from <br /> - the laboratory to the facility and back to the laboratory again W. 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 /> 4 ; <br /> A decontamination blank is prepared in the field during well sampling. After the first well is <br /> Ji`rz i sampled,DI water is poured into the clean,rinsed sampling bailer that is to be used for sampling i <br /> the next well. This DI water is then emptied,as a sample,into a preserved 40-m1 VOA bottle for <br /> g r anal with the.samples and trip blank.. The decontarr�ination blank indicates if any of the <br /> 3..-,;� <br /> samples are cortarninated from the sampling equipment orecontaininatioci process. ; <br /> 4. <br /> ASS Sample Analysi§ <br /> A undwater weIl saiples, the tz�ip blank,and the decontamination blank are analyzed by:tfie <br /> r .1.� <br /> All gro - - - i <br /> ` . laboratory according to'fable 2 of the Tri-Regional R4—commenclat:on§but typically for-total ; <br /> petroleutx►hydros arbons (TpH) by I HS-modified EPA Merhod 801,5 and fRr the aromatic <br /> hydrocarbons benzene,toluene,xylenes,and ethylbenzene(B'IX>:)by DHS lviothod 8020. <br /> E <br /> i <br /> U <br /> f : e42p 11050/nov/apa <br /> A-5 <br /> yl <br />