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i <br /> ti <br /> ■ <br /> s <br /> • <br /> preservation, and all VOC vials were prepared with H1 <br /> to prevent volatile degradation prior to analysis, All <br /> saiples for mewl analysis were field filtered, <br /> utilizing a .45 um cellulose acetate filter pad and <br /> preserved in a bottle with H . <br /> -All volatile samples were taken from the tap of the <br /> bailer prior to other sampling to ensure minimal loss. <br /> -After collection, samples were immediately placed in <br /> an iced cooler, before proceeding to the next well. <br /> -Once samples were gathered frorn each individual <br /> well all equipment ent was cleared according to <br /> standard field protocol to avoid crass-contamination) , <br /> This process includes ars initial rinse in a detergent <br /> solution Alconox , a triple rinse in distilled Mater, <br /> a rinse in 1 pesticide grade methanol solution and a <br /> final triple rinse in distilled water. Additionally, <br /> the bailer- purged with 5 or more volumes of water from <br /> the well which is to be sampled in order to ensure the <br /> gathering of formation water. <br /> -For additional duality control a laboratory (Distilled <br /> Water) trip blank, equipment blanks and duplicate <br /> samples are taken for each day of sampling. <br /> -A field log is }sept for each sampling trip with <br /> accurate field conditions, field readings, and <br /> notations alerting the laboratory of any possible <br /> sampling problem which might affect accuracy of <br /> analysis or might explain discrepencies. <br /> ANALYTICAL METHODS: <br /> Approved methods were used for all analyses. A .fisting of the <br /> method used for each parameter tested follows. <br /> Parameter Method Reference <br /> pH electrode <br /> Conductivity Wheatstone Bridge or electrode <br /> Dissolved- Oxygen electrode <br /> Ammonia 417 E ref, 1 <br /> Alkalinity 403 . c ref. 1 <br /> Nitrate 418 A, 1 ref,, 1 <br /> Calcium' 215, 1 ref. 2 <br /> Iron 236. 1 ref. 2 <br /> Magnesium 242 . 1 ref. 2 <br /> Manganese 243 , 1 ref. 2 <br /> Sodium 273. 1 ref. 2 <br /> Volatile Organic <br /> Compounds 502 . 1/503 ref, <br /> 2 <br />