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Lo Geological Technics Inc. Page 3 <br /> Ripon Milling Inc. <br /> Monitoring Well Installation Work Plan <br /> Project No.253.2 <br /> 46WProject <br /> 3, 1995 <br /> i- A bailer blank for each well will be collected prior to sampling by filling the <br /> decontaminated stainless steel bailer with water{provided by the laboratory) and <br /> then filling a VOA vial (provided by the laboratory) using the same procedures <br /> for actual sample collection. <br /> Bailer blanks for each sample, along with a field blank (prepared from water <br /> provided by the laboratory poured into a VOA vial on site), will accompany the <br /> samples to the laboratory and serve as checks against cross contamination. <br /> `+ A chain of custody document, listing all samples collected, accompanies the samples <br /> from field to laboratory, thereby providing a means to track their movement and <br /> insure their integrity. <br /> All water purged from each monitoring well and not used as a sample, was placed <br /> in a 55 gallon DOT approved container, properly labeled and stored onsite. <br /> 1.3 Soil Sampling Procedure <br /> 16. <br /> Soil samples will be collected for geological and analytical evaluation at five foot <br /> intervals. A boring log providing sediment description using the U.S.C.S. and field <br /> w,. observations will be maintained by a professional geologist working under the <br /> supervision of a registered geologist. Soil samples will be collected in 6.0 inch brass <br /> liners using a 2.0 inch modified California split spoon sampler. All soil samples will <br /> +• be sealed with aluminum foil,capped, labeled and placed in a cooler at 4° Celsius for <br /> transport to the laboratory following Chain of Custody protocol. <br /> +-' Because every soil sample collected will not be submitted for laboratory analysis, a <br /> screening process will be used to gather additional information through field <br /> observation noting sediment type, especially grain size and clay content; moisture <br /> `' content; visible evidence of contamination, i.e., color change due to reduction of iron <br /> or discoloration from hydrocarbons and other pollutants, and the readings above <br /> background on a organic vapor meter (OVM). The OVM is a field portable photo <br /> ionization detector that uses a 10.0 eV lamp to detect compounds with ionization <br /> potential below 10.0 eV (hydrocarbon range). <br /> 1.4 Soil and Water Analyses <br /> L. Based on field screening observations one soil sample from the capillary fringe will <br /> be submitted to Sherwood Laboratories of Hilmar (State Certified Laboratory#1400) <br /> and analyzed for benzene, toluene, ethylbenzene and xylene (BTEX by EPA method <br /> 8020), and diesel range petroleum hydrocarbons analyses (TPH-Diesel by EPA <br /> method 3540/8015m). The detection limits for these compounds are listed below. A <br /> V <br /> LW <br />