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w Page 2 Ms. Mary Meays July 15, 1991 The remainder of the boring, from 15 to 30 feet, was filled with 10 to 15 feet. Th sand. Both wells were secured with traffic boxes at 4 tihe ground surface. Standard ERM-West, Inc. Quality Assurance/Quality Control (QA/QC) procedures were followed throughout the construction process. All augers were decontaminated by steam cleaning prior to drilling each well. a an split spoon sampler was decontaminated prior to each us. by g Alconox solution followed by a clean water rinse. The brass tube liners for the sampler were similarly cleaned prior to use, The well casing or to use. screen were cleaned and decontaminated by steam cleaning p ri Soil cuttings from each boring were placed in labeled 55-gallon drums and stored on site. P D nnrnentapd meter Ss ]in Following construction, the r.ew wells were developed by hand-bailing approximately 15 to 18 gallons (or 12 to 13 well of mes)nd from each ac well. The balling was continued until temperature, p H. tivi stabilized, and the silt content lls the pu ged by water similar markedly of (Table 1). The pre-existing water. ffis QA/QC p racetlures were followed during develupment anti purging. Prig+ to work at eaeil well, the bailer was cleanczl and decontaminated with t,n Alconox solution followed by a clean waiver rinse. Bailer cord was replaced ocaion. ailed water and watefrom the in between sampling at es nclwastcontaBned n 55 gallon drumrs and stored decontamination pro on site. After development and purging procedures were completed, all wells were sampled. The wells were sampled with a pre-cleaned Teflon bailer equipped with a removable petcock. Water was transferred from he toiler into laboratory-supplied bottles. All sample.. (�pater and type plastic bags, he laboratory were labeled and sealed individually in zip- then placed on ice in a cooler. it n t r Anal Ltd., a `fh+, soil and water samples were submitted to Curtis &Tompkins, > ry located California , California. he samples were hippedtunder ified accha chain-or-custody in Berkeley, and analyzed according to the following test procedures: " Total Petroleum Hydrocarbons as Gasoline -- EPA Method 8015- Modified;