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%W01 <br /> 1. H. KLEINFELDER & ASSOCIATES <br /> SOIL SAMPLING PROCEDURES <br /> Soil samples will be collected for chemical analysis and to complete <br /> lithologic logs. Samples will be collected every five feet beginning at <br /> the 10 foot depth or as field conditions allow with the deepest sample <br /> collected at approximately 20 feet. <br /> Soil samples will be collected by advancing the boring to a point <br /> immediately above the sampling depth and then driving a Modified <br /> California Sampler lined with three brass tubes into the undisturbed soil. <br /> The sampler will then be removed from the bottom of the borings and the <br /> bottom (third) tube sealed with aluminum foil and tight fitting plastic <br /> caps. The sealed tube will be immediately stored in an iced cooler. <br /> QUALITATIVE FIELD SCREENING <br /> A Photovac TIP using a photoionization detector (PID) will be used to <br /> screen each soil sample collected. The PIA measures total ionizable <br /> compounds in air in parts per million by volume (ppmv) in relation to a <br /> select standard. The standard proposed €orfthis investigation will be a <br /> 25 or 50 ppm benzene calibration gas. Calibration will be performed prior <br /> to use in the field. The PIT} field screening of the soil samples should <br /> provide a qualitative indication of the presence of petroleum <br /> hydrocarbons. <br /> SAMPLE SELECTION AND ANALYSIS <br /> The terminal sample (20 foot depth) from each boring will be submitted for <br /> analysis. All remaining samples will be retained until analytical results <br /> are obtained for the terminal samples. Should our field screening <br /> indicate possible contamination at any depth, Pacific Coast Producers will <br /> be notified. <br /> All samples collected will be handled under strict chain-of--custody <br /> procedures. The three terminal samples will be submitted to a state <br /> certified laboratory for analysis for Total Petroleum Hydrocarbons (TPH) <br /> using EPA method 8015 and benzene, toluene, xylene (BTX) by EPA method <br /> 8020. Routine analysis turn-around will be requested with results <br /> expected back in 10-15 working days. <br /> REPORT OF FINDINGS <br /> Upon receipt of the analytical results, a data report will be prepared for <br /> agency submittal. The report will present the field and laboratory <br /> findings, and copies of the boring logs. <br /> The data report is not intended to provide a detailed report covering all <br /> aspects of the investigation. It is solely for assessing whether or not <br /> soil contamination is present below and/or adjacent to the tank at a <br /> reasonable cost. If additional work or expanded information is required, <br /> Kleinfelder can provide such services at additional cost. <br /> 36-87--1057 2 <br />