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1 <br /> w <br /> WaterWork <br /> Soil Sam ling Protocol <br /> 1 • Sample Collection During Drilling Activities <br /> A proposal will be submitted to the Public Health Division of <br /> the County Health Department with proposed boring/sampling <br /> locations. The exact location and number of borings at each <br /> site will be determined in the field by the Project <br /> Geologist/Engineer. <br /> Prior to arriving at the sample site, the drill ri / <br /> auers <br /> will be steam cleaned and all sample equipment will be washed <br /> with laboratory grade detergent and rinsed twice with tap <br /> water and once with deionized water. This procedure will be <br /> conducted on-site on all sampling equipment between each <br /> sample interval . <br /> Soil samples will be obtained using a California modified <br /> split-spoon sampler containing three, six inch long, <br /> diameter brass tubes. The two inch <br /> sampler will be driven 18 inches <br /> ahead of the hollow stem auger by a 140 pound hammer with a <br /> 30 inch drop in accordance with American Society for Testing <br /> and Materials (ASTM) Methods D 1586-84 for split barrel <br /> sampling of soil and D 1587-83 for thin-walled tube sampling <br /> of soils. The blows required to drive the sampler each six <br /> inch interval will be recorded on the boring log. The <br /> sampler will be removed from the boring and opened to reveal <br /> the brass tubes . The bottom tube will be ca <br /> pped with <br /> aluminum foil and plastic end caps, taped and labeled with <br /> the following information: date, time, project ID, sample <br /> ID, name of sampler and type of analysis. This sample will <br /> be immediately placed into a cooler containing dry ice or <br /> frozen "blue ice" . A "high-low" temperature recording <br /> thermometer will accompany sample shipments to ensure proper <br /> temperature maintenance. The samples will be delivered to a <br /> state certified laboratory under chain-of-custody protocol <br /> within 48 hours of sampling, when possible. <br /> Soil in the uppermost brass tube will be described for <br /> texture, color, consistency, moisture content, presence of <br /> contamination and any other distinguishing characteristics . <br /> Soil properties will also be noted in the middle brass tube <br /> and from the sampler shoe. Alternatively the second sample <br /> tube may be used with the uppermost tube for preparation of <br /> duplicates. These field observations will be noted on a log <br /> prepared for each boring/well . <br />