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v <br /> April 22, 1987 AGS 8691-6 <br /> Beacon Service Station #1-502 - Lodi, California <br /> A cast-iron C.N.I . utility box with a steel skirt was placed over <br /> the well head and set in concrete flush with the surrounding <br /> surface grade. The utility box has a water-tight, threaded seal <br /> to protect against surface water infiltration and requires a <br /> specially designed spanner wrench to open. This reduces the <br /> possibility of well vandalism or accidental disturbance. <br /> WELL DEVELOPMENT AND SAMPLING <br /> Applied GeoSystems personnel were present on March 23, 1987 to <br /> develop the well and collect samples. The water level was <br /> measured and found to be approximately 42 feet below the ground <br /> surface. After the initial water level measurement, the well was <br /> sampled using an acetone-washed and distilled water-rinsed teflon <br /> bailer. The bailer was lowered half-way through the ground water <br /> surface to obtain a sample from the surface of the water. The <br /> sample was then examined for hydrocarbon odor, sheen, emulsion, <br /> or floating product. No evidence of contamination was noted. <br /> The well was then developed by air jetting, swabbing, and <br /> pumping. The pump used was an electrical submersible type, and a <br /> minimum of six well volumes were purged from the well. After <br /> ground water recovery to static conditions, the bailer was <br /> cleaned with acetone and distilled water and the formation water <br /> was sampled for chemical analysis. The bailer was lowered <br /> 6 <br /> .4,�,o/ied Geosystems <br />