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NOW ..i <br /> ARCADIS Ms. Lisa Medina <br /> June 22, 2012 <br /> 4.3 Site Specific HASP <br /> As required by the Occupational Health and Safety Administration(OSHA) <br /> "Hazardous Waste Operations and Emergency Response"guidelines (29 Code of <br /> Federal Regulations Section 1910.120), and by California Occupational Health and <br /> Safety Administration (Cal-OSHA)"Hazardous Waste Operations and Emergency <br /> Response" guidelines (California Code of Regulations Title 8, Section 5192), <br /> ARCADIS will update the site specific health and safety plan (HASP) prior to <br /> commencement of field work. The field staff and contractors will review the <br /> HASP prior to beginning field operations at the site. <br /> 4.4 Underground Utility Locate <br /> Underground Service Alert (USA)will be notified a minimum of 48 hours prior to <br /> commencing field activities to identify public utility alignments that may be in conflict <br /> with the proposed borings. In conjunction with USA, a private utility locating company <br /> will be utilized to further evaluate the potential presence of underground utilities in <br /> the vicinity of the proposed boring locations. Prior to installation, the proposed <br /> borings will also be manually cleared of underground utilities. Locations may require <br /> field modifications due to on-site utility locations and/or field conditions. <br /> 4.5 Soil Boring Advancement and Well Construction <br /> 4.5.1 Soil Borings <br /> Prior to drilling, the borings will be hand cleared using an air knife or hand auger to a <br /> minimum depth of 6.5 feet(utility clearance depth) bgs and a minimum diameter of <br /> 110%of the outside diameter(OD) of the augers. The minimum diameter of the <br /> borehole to be hand cleared will be approximately 11 inches since the OD of the <br /> hollow stem augers (HSA)to be used is 10 inches. The borings will be advanced to a <br /> depth of approximately 70 feet bgs. The final depth for each borehole may be <br /> modified based on conditions encountered in the field. <br /> 4.5.2 Soil Sampling and Screening <br /> Soil samples will be collected at 5 foot intervals for logging, visual classification and <br /> analytical purposes from the bottom of the hand auger/air knife interval to borehole <br /> termination using the California Modified Split Spoon Sampler. Soil samples will be <br /> field screened with a photo-ionization detector(PID). The soil screening procedures <br /> Page: <br /> G NpigecfiENMMAG 590MNmm &v %am1SVE pilN tali r plenlAM5 1M22W SVE%W TUIV ft 4/9 <br />