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i <br /> Ground-Water SamRing <br /> The static water level in each well was measured to the nearest 0 01-foot with a Solinst <br /> water-level sounder cleaned with industrial soap and water before use in each well A clean <br /> bailer was used to obtain a sample from the surface of the water in each well The sample <br /> was retrieved and inspected for floating product, sheen, emulsion, color, and clarity The <br /> thickness of floating product detected was recorded to the nearest 1/8-inch <br /> Wells that did not contain floating product were purged using a 3 5-inch-diameter stainless- <br /> steel electric submersible pump The pump, cables, and hoses were cleaned with industrial <br /> soap and water before use in each well The wells were purged until withdrawal is of <br /> sufficient duration to result in a stabilized pH, temperature, and electrical conductivity of <br /> the water measured using portable meters calibrated to a standard buffer and conductivity <br /> standard If the well was dewatered, the water level was allowed to recover to at least 80 <br /> percent of the initial water level <br /> Before collecting each groundwater sample, a Teflon bailer was cleaned with industrial soap <br /> and rinsed with tap water and deionized water, and the sampler changes latex gloves The <br /> appropriate preservative (concentrated sulfuric, nitric, or hydrochloric acid) was added to <br /> each sample bottle as required for the preservation of the sample before laboratory analysis <br /> A sample of the formation water was then collected from the surface of the water in each <br />. of the wells using the Teflon bailer The water samples were sealed in laboratory-cleaned, <br /> 40-milliliter glass vials with Teflon-lined lids so that no air bubbles are present The <br /> samples were then labeled and promptly placed in iced storage Chain of Custody Records <br /> were initiated by the field geologist and accompanied the samples to the analytical <br /> laboratories A field log of well evacuation procedures and parameter monitoring was <br /> maintained <br /> The fluids generated during sample purging were directed into type 17E, steel, 55-gallon, <br /> liquid waste drums approved for this use by the Department of Transportation The drums <br /> were labeled and temporarily stored onsite pending disposal <br /> Sample Labeling and Handling <br /> Sample containers were labeled in the field with the fob number, sample location and depth, <br /> and date and promptly placed in iced storage for transport to the laboratory A Chain of <br /> Custody Record was initiated by the geologist and updated throughout handling of the <br /> samples and accompanies the samples to a laboratory certified by the State of California for <br /> the analyses requested Samples were transported to the laboratory promptly to help ensure <br /> that recommended sample holding times will not be exceeded Samples in our custody will <br /> be properly disposed of after their useful life has expired <br /> i �$-s <br />