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RMMME <br /> 3.2 Soil S&mplirig <br /> ."`. Grab samples of cuttings were logged continuously during <br /> drilling for identification of stratigraphy and detection of <br /> hydrocarbon ccntamination. Field screening of volatile <br /> organics emitted from the soils was conducted with a <br /> phctoionization detector (PID) . The PID readings are. <br /> plotted adjacent to the soil intervals tested on the well <br /> log (Appendix I) . Discrete samples were taken at five <br /> foot intervals to the water table starting at five feet <br /> below grade. These samples were collected in two inch <br /> diameter brass tubes using a California modified sampler. <br /> Samples were collected, preserved and transported under <br /> chain--of-custody in accordance with WaterWork's Soil <br /> Sampling Protocol (Appendix II) . The ten foot sample from <br /> each boring was analyzed for benzene, toluene, ethylbenzene, <br /> xyljne (BTEX) by EPA 8020 and total petroleum hydrocarbons <br /> as d i orn a e p a ment f Health <br /> ' erv' s methodo ogy. The minimum detection lev for <br /> TEX in. soil samples analyzed by B.C. Laboratories is 0. <br /> � = TPH in soil samples, 10.0 ppm. <br /> 3.3 Grcundwater Sampling <br /> Subsequent to installation and well development, water <br /> ' samples were collected from the monitoring wells after <br /> purging a minimum of four well volumes (casing and sand <br /> pack) from each well. The purging logs are presented in <br /> s Appendix 111. The parameters electrical conductivity (EC)', <br /> pH and temperature was checked during purging, and before <br /> and after sample collection to ensure samples collected are <br /> F representative of formation water. Purged water was <br /> discharged• directly into the facilities septic tank <br /> disposal system. Water sample collection, prnvervation and <br /> transportation under chain of custody wnconducted in <br /> i accordance with WaterWork's Groundwater :, snapling Protocol <br /> (Appendix II). The water samples were analyzed for BTEX, s fed <br /> and TPH as diesel by EPA 5030/8015/8020. The minimum . <br /> detection level for BTEX in water samples analyzed by , <br /> Sequoia Analytical is 0.3 ppb; for TPH in water samples, <br /> 30,0 ppb. Because the monitoring wells were located within p� <br /> 50 feet of sanitary sewer lines fecal coliform sampling was "���QK <br /> r-quired by the SJCPHSEHD. Fecal coliform samples were <br /> collected in sterile sample containers and immediately 2,9't2 <br /> delivered to California Water Labs for analysis by state 4�_ <br /> methodology. <br /> �e 9 <br /> 3.4 Quality Assurance/Quality Control Program �9 <br /> t1 WaterWork's Quality Assurance and Quality Control (QA/QG) <br /> Plan, Appendix IV, outlines the field and laboratory <br /> praredures followed to obtain representative data. The <br /> _-- ---._.-- -----_- _._.... -- ---previously-referenced _monitoring-and-sampling--pr.atocals--__-_ <br /> (Appendix II) outline additional QA/QC procedures The - -- - ---- - — <br /> s : <br /> 3 <br /> i <br />