ARCHIVED REPORTS XR0001291 - Laserfiche WebLink

Home Browse Search

I APPENDIX A FIELD PROCEDURES Drilling Methods Before drilling began, Underground Service Alert was notified of the intent to drill so that approximate locations of underground utility lilies and structures could be marked The soil borings were started by hand-augering to a depth of 5 feet to minimize the possibility of damaging underground utilities The borings were drilled with a mobile B-61 or similar dell ng equipped with 10-inch-outside- diameter by 5-1/4-inch-inside-diameter, continuous-flight, hollow-stem augers The augers were steam cleaned before use in each boring to minimize cross-contamination of the borings The dell cuttings were stockpiled on site and covered with plastic before disposal at an appropriate disposal facility i Soil Sampling in Borings Soil samples for analysis and identification were collected at approximately 5-foot intervals from the bonngs during drilling Soil samples were collected by advancing the boring to a point just above the sampling depth, and then driving a California-modified, split-spoon sampler containing clean brass or stainless steel sleeves through the hollow center of the auger into the soil The sampler was 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 were counted and recorded to evaluate the relative consistency of the soil Sampling equipment was cleaned between each use with an industrial soap and clean tap water The samples selected for laboratory analysis were removed from the sampler and promptly sealed in their brass sleeves with Teflon® tape and plastic caps The samples were labeled and promptly placed in iced storage for delivery to the laboratory Logging of Borings Soil samples were logged using the Unified Soil Classification System Samples not selected for chemical analysis and the soil sampler shoe were extruded in the field for examination The texture, color, moisture, plasticity, and consistency of soil, the blow counts, and subjective SACW\PJW80"8051460 7DS-96VHb 2 A-1 Rev 0,10/25/96