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Mr Daniel K Barber <br /> D K Barber& Associates <br /> April 30, 2001 <br /> ' Page 2 of 4 <br /> BORE INSTALLATION AND SAMPLING PROCEDURES <br /> ' On December 4 and 13, 2000 exploratory boreholes and monitoring well MW-1 were <br /> drilled by Fisch Environmental Exploration (Lodi, California), under direct supervision <br /> ' of SES's field geologists, Mr Fred Hayden or Mr Henry Pietropaoli The SES geologist <br /> also assisted the project site manager, Mr Dan Barber, P E , in geologic logging of the <br /> ' boreholes on which we provided oversight <br /> The locations of the boreholes are shown on the attached figure (base map provided by j <br /> Mr Barber) The boreholes were drilled using a hydraulic-powered, percussive, direct- <br /> push method (similar to GeoProbeTn, which advances an approximately 3 25-inch <br /> outside diameter (OD) hollow steel drive string that is lined with plastic or brass <br /> ' sampling sleeves This technique allows for depth-specific soil samples to be collected <br /> for laboratory analysis, and for visual examination of lithology and evidence of <br /> contamination Following removal of the sampling sleeves from the drill rods, the <br /> sleeves selected for laboratory analysis were labeled, capped, chilled, and readied for <br /> ' transport to the analytical laboratory <br /> A total of 3 exploratory boreholes were initially advanced on December 4, 2000, in <br /> 1 addition to the borehole for well MW-1 The exploratory boreholes were labeled C-1, C- <br /> 2, and C-3 A total of 15 soil samples were collected for laboratory analysis from two <br /> boreholes C-1, C-2 and C-3 These samples are designated by borehole number and depth <br /> below grade of the top of the approximately 6-inch long sample sleeve (e g C-3-52' was <br /> collected from borehole C-3 at a depth of 52 to 52 5 feet below grade) A total of three <br /> ' "grab" groundwater samples were collected from three boreholes (C-I C-2 and C-3) and <br /> are similarly designated (e g "C-3-W") Soil and water sample locations are recorded on <br /> the borehole geologic logs (Attachment A) <br /> 1 D K Barber & Associates advanced four additional boreholes - - <br /> C 4 through C 7 on which <br /> ' SES did not participate Mr Barber indicated to SES that soil samples from boreholes C- <br /> 4 and C-5 exceeded analytical laboratory holding times Therefore, boreholes C-6 and C- <br /> 7 were advanced within several feet of the original C-4 and C-5 boreholes to obtain new <br /> ' soil samples for laboratory analysis Attachment A contains the borehole geologic logs <br /> . for C-6 and C-7 that were logged by D K Barber & Associates <br /> Stellar Environmental Solutions <br />