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4, ..o Waterwork Soil Sampling Protocol A proposal will be submitted to the Public Health Division of the County Health Department with proposed boring/sampling locations . The exact location and number of borings at each site will be determined in the field by the Project Geologist . ` Prior to arriving at the sample site, the drill rig/augers will be steam cleaned and sample equipment will be washed with laboratory -rade detergent and rinsed twice with tap water and once with delonized water. This procedure will be conducted on site on all sampling equipment between each sample interval. Soil samples will be obtained using a California modified split- spoon sampler containing three six inch long, two inch diameter brass tubes . The sampler will be driven 18 inches ahead of the hollow stem auger with a 140 pound drop hammer falling 30 inches . The blows to drive the sampler each six inch interval will be recorded on the boring log. The sampler will be removed from the boring and opened to reveal the brass tubes . The bottom tube will be capped with aluminum foil and plastic end caps, taped and •- labeled with the following information: date, time, project ID, sample ID, name of sampler and type of analysis . This sample will be immediately placed into a cooler containing dry ice or ,blue ice" . The samples will be delivered to a state certified laboratory under chain of custody ice with 48 hours of sampling, when possible. Soil in the uppermost brass tube will be described for texture, color, consistency, moisture content, presence of contamination and any other distinguishing characteristics . Soil properties will also be noted in the middle brass tube and from the sampler shoe. These field observations will be noted on a log prepared for each boring/well . During sampling, latex gloves will be worn to prevent cross- contamination with other samples . The disposable gloves will be discarded after collecting samples from each 18-inch sample drive.