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a <br /> it <br /> Prior to sampling,the depth to water was measured in all monitoring wells using an electronic immersion probe. ; <br /> All measurements were read to the nearest 0.01 foot. If free product was present,the depth to free product and <br /> the depot to water was measured using an interface probe and an observation sample was collected with a clear <br /> teflon bailer for confirmation, No analytical samples were collected from monitoring wells containing more <br /> t- than 0.25 inch of free product. <br /> The monitoring wells were sampled on December 30, 1984. Prior to purging,each well was checked with a clear . F <br /> N teflon bailer in order to observe the possible presence of floating hydrocarbons. Purging was accomplished using <br /> a <br /> a stainless steel or teflon bailer. The bailer was thoroughly cleaned prior to each sampling using a trisodium <br /> phosphate solution followed by a 10°Ic methylalcohol solution,and then rinsed twice with potable water. The . <br /> wells were purged prior to sampling until pH,conductivity, and temperature values stabilized. Generally, this 4 <br /> 0 approximately resulted lit the removal of approxately 3 to 5 well volumes of ground water from each well during the purging <br /> process. The water obtained from purging was placed in labeled 55-gallon drums and stared on-site. The bailer '+ <br /> i ,tine was replaced after each sampling. Samples recovered from each well were decanted into two appropriately .. . <br /> prepared and labeled 40-m1 volatile.organic analysis(VOA)bottles. A travel blank(numbered as MW-34)was <br /> also submitted for duality assurance. The sample bottles were immediately placed in an ice chest and maintained <br /> at 4'C until delivery to a State of California licensed laboratory. Routine chain-of-custody procedures were <br /> employed. <br /> 1 3S <br /> 1 <br /> } <br /> M < <br /> A-1 <br /> b , <br /> 15 <br /> MME <br /> .,rz cys�.bajevw*•-..— �viA k'.�.sot—_.`su .:r..d'L N..:r w,. ..m'ym' ti <br />