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i Sample Labeling and Handling The soil samples selected for possible laboratory analysis will be removed from the sampler and quickly sealed in their brass sleeves with Teflon tape and plastic caps The respective sample containers will be labeled in the field with the lob number, sample location and depth, and date, and promptly placed in iced storage for transport to the laboratory Chain-of-custody records will be initiated in the field by the geologist and accompany the samples to a laboratory certified by the state of California to perform the analyses requested Drilling Methods Before drilling begins, we will notify Underground Service Alert of our intent to drill so that approximate locations of underground utility lines and structures can be marked The soil borings will be started by hand-augenng to a depth of 5 feet to iruni m ize the possibility of damaging underground utilities The bonngs will be drilled with a mobile B-61 or similar drill rig equipped with 10-umch-outside- diameter by 5-1/4-inch-inside-diameter, continuous-flight, hollow-stem augers The augers will be steam cleaned before use in each boring to irunmuze cross-contamination of the borings The drill cuttings will be stored in type 17-E, steel, 55-gallon drums or stockpiled on site and covered with plastic before disposal at an appropriate disposal facility Soil Sampling in Borings Soil samples for analysis and identification will be collected at approximately 5-foot intervals from the bonngs during drilling Soil samples will be Collected by advancing the boring to a point dust above the sampling depth, and then driving a California-modified, split-spoon sampler containing clean brass or stainless steel sleeves through the hollow (,enter of the auger into the soil The sampler will be driven 18 inches with a standard 140-pound hammer repeatedly dropped 30 inches The number of blows needed to drive the sampler each successive 6 inches will be counted and recorded to evaluate the relative consistency of the soil Sampling equipment will be cleaned between each use with an industrial soap and clean tap water The samples selected for laboratory analysis will be removed from the sampler and promptly sealed in their brass sleeves with Teflon tape and plastic. caps The samples will be labeled and promptly placed in iced storage for delivery to the laboratory Logging of Borings Soil samples will be logged using the Unified Soil Classification System The texture, color, moisture, plasticity, and consistency of soil, the blow counts, and subjective evidence of 40 SAL\N\,PIM805v08051400 31)S-95 p t.+ 1 A-2 Rev 0,7/23/96