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Groundwater Sampling <br /> The monitoring well will be sampled. A brief summary of the procedures follows: The <br /> borehole will be advanced into the aquifer and temporally cased. The water entering <br /> the borehole will be sampled using a clean bailer, and carefully poured into the <br /> appropriate laboratory prepared container with minimum cavitation. The <br /> monitoring well will be purged using calculated well volumes based upon the depth to <br /> water in each casing. Depth to groundwater measurements will be made to the <br /> nearest one-one hundredth of one foot, and also checked for the presence of separate <br /> phase product. As each purge volume is removed, measurement of pH, electrical <br /> conductivity and temperature will be taken until these parameters stabilize, which is <br /> interpreted to be aquifer water entering the casing. The sample will be carefully <br /> collected with a clean bailer and poured into the appropriate laboratory prepared <br /> container with minimum cavitation. <br /> Each water sample be labeled, logged onto a chain-of-custody form, and placed in a <br /> chilled ice chest. Upon completion of well sampling, the well will be closed and <br /> locked. <br /> Chemical Analysis and Results <br /> One groundwater sample will be analyzed at a state certified analytical laboratory. <br /> Selected samples were tested for the following; Total Petroleum Hydrocarbons as <br /> Gasoline (TPHG) and Benzene (B), Toluene (T), Ethylbenzene (E), Eylene (X) using EPA <br /> Methods 3510/8015 and 8020. <br /> Report <br /> A report of the well replacement will be prepared. This report will include all <br /> observations and chemical data from soil and water removal and disposal. Exploratory <br /> boring log, well construction detail, development, sampling and a-brief discussion of <br /> the excavation results and soil and groundwater disposal and well installation will be <br /> provided. <br /> p CEO <br /> Please call if you have any questions. <br /> Cl- N2 12fi2 <br /> Sincerely, r 1 n CERTIFIED <br /> ENGINEERING <br /> GE4LDGlST <br /> ohn' Lynch Christopher M. Palmer `��q�F 9Qt�`P <br /> President C.E.G. 1262; HG 246 QF CALWF <br /> attachments: Figure 1. Locations of Proposed Soil Excavation and Well Location <br /> Wright Sampling and Well Installation Protocols <br /> cc: Mr. Steve Sasson, (PHS-EHD) <br /> Mr. George Lockwood, (SWRCB UST Fund) with Preapproval Request <br />