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a <br />•L - <br /> ORING AND SAMPLING PROCEDURES <br /> GRO� ATER NfO1`11T <br /> measured in <br /> all monitoring Wells using an electronic <br /> Prior to sampling, <br /> the dept4.j to water asproduct was present, <br /> ! y <br /> immersion robe. All meas'1Cetnents were read to the near ter were measuredf using am interface probe las we e <br /> immer P <br /> the• depth to free product and the depth to water <br /> sample was collected with a clear teflon bailer 0for co <br /> inch of re opt,ductnalytica same } <br /> observationp wells containing more than <br /> collected from monitoring <br /> g <br /> _ '1'}te monitoring wells were sampled on Decetnber 18' <br /> 1990. Prior to purging, each well was checked <br /> with a clear terton bailer in order to observe the possible presence of floating hydrocarbons. Putgl}g <br /> n owed by a 10%methyl alcohol solution, <br /> d using a stainless steel or tenon bailer. The bailer was thoroughly cl:shed Prior to <br /> was aecomplishep solution E lin until pH, <br /> each sampling using a trisodium Phosphate JSP) purged <br /> ed riot to sampling <br /> potable water. The wells his resulted in he removal of approximately <br /> and then rinsed twice with p process. The water obtained <br /> conductivity,and temperature values stab D,aed. Generally, the purging p <br /> — 3 to 5 well volumes of ground water from n d well duringThe bailer rope aced <br /> labeled 55-gall drums and stored on-site_ to two appropriatelyspp replaced <br /> from Purging was placed in la eacwell were decanted torewys <br /> after each sampling- Samples recovered from VOA bo <br /> ttles. A travel blank(numbered as MW-A) <br /> and labeled 40-tnl volatile organic analysis ) per site will be analyzed• Duplicate samples w7-es' <br /> also submitted for quality assurance. One travel blank p <br /> oratory when directed ry Du Pont Environmental <br /> ined at 4°C until deliveryjto a <br /> only be analyzed by the lim ry <br /> chest <br /> The sampleto Routine chain-of-custody procedures were employed• <br /> bottles were immediately placed in an ice t and maintained <br /> r State of California licensed laboratory. <br /> A- 1 <br /> F <br />