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1 <br /> 5amptmg Mctitods Page 2 <br /> • <br /> 1 Drill ng augers, drill rods, and dell bits will be steam-cleaned prior to use and between <br /> bonngs Vmble soil, grease, and other unpunties wig]be removed <br /> 2 Soil sampling equipcwnt will be steam-cleaned prior to use and between each boring <br /> Prior to indrvxhial sample collection, any sampling device will also be cleaned in a TSP <br /> solution and rinsed twice im clean water Any visible soil residue will be removed <br /> 3 It is anticipated that disposable equipment will be used to collect water samples If <br /> disposable equipmemt is not used, water sampling equipment will be decontaminated <br /> using methods described in item 2 above for sail sampiing equipaient <br /> 4 Water satrnpling containers will be cleaned and prepared by the respect;ve analytical <br /> laboratories <br /> 5 Stainless steel or brass soii sampling tubes will be steam-cleaned or hashed in TSP <br /> solution and rinsed wrt--i clean water <br /> 6 Field inanitoruig equipment (pH, conductivity, or temperature proles) will be rinsed <br /> with clean water prior to use and between samples <br /> C FIELD MMASUTREMEtiTS <br /> Field data wi11 be collected during vanous sampling and monitoring acavrtits, this section describes <br /> routine procedures to be followed by personnel performing field measurements The methods presented <br /> below are intended to ensure that field measurements are consistent and reproducible when performed by <br /> various persom)el <br /> C 1 Buried Utility Locations <br /> Prior to conuriencernent of work on site Daulos will contact aporopriate utility compmies to have <br /> underground utility lines Iocaied Doulos will also visually survey the site to estimate the locations of <br /> potentially unmarked t_ndergrDLnd utilities All work associated with the borings will be preceded by <br /> hand augencg to a rnirwuum depth of 5 feet below grade to avoid damag-ng underground utilities <br /> C 2 Lnthologic Logging <br /> A log of soil candtuans encountered during the dndLng and sample collection will be rnauilainrd using the <br /> Uruhed Soil Classification System by a Doulos geologist A California registered geologist will review <br /> all boring logs <br /> The collected soil samples will be examined and the following uiforma im recorded boring location, <br /> sample uuerval and depth. blow counts, color, soil type, moisture content(qualitative), and depth at <br /> which ground water(if present)is first encountered Also recorded on the soil borng logs will be the <br /> field screcnirig results derived from the use of a portable PID or FID <br /> C 3 Disposal Procedures <br /> Soils and fluids that are produced an&or used during the installation and sampling of borings, and that are <br /> known or suspected to contain potentiaLly hazardous materials, will be con*dined during the above <br /> operations These substances will be retained on site until chemical iestmg has been completed to <br /> deterrnim the proper means of disposal Handling and disposal of substances known or suspected to <br /> contain potentially hazardous materials wi.1 comply with the applicable regulations of DHS, the California <br /> Department of Water Resources, and any other applicable regulations Soils and fhiids produced andlor <br />