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A.4 Equipment Cleaning <br />Downhole equipment (rods, sampler) will be cleaned prior to each borehole. <br />It is anticipated that most sampling equipment will be disposable. Non-disposable sampling <br />equipment (e.g. a steel water sampling device) will be cleaned with a brush in a solution of high- <br />purity phosphate-free soap and potable water, then rinsed with potable water followed by double <br />rinsing with deionized water prior to each sampling run. <br />Downhole equipment and vehicles which warrant it, will be steam cleaned prior to leaving site at <br />completion of sampling. <br />A.5 Investigation-Derived Residuals <br />Soil cuttings will be placed in labeled 55-gallon DOT-approved drums with bolt-on covers. <br />Decontamination water and groundwater residuals will be contained in labeled 55-gallon <br />DOT-approved drums with bolt-on covers. All residuals generated during sampling activities will be <br />removed from the site and disposed of according to appropriate regulations. <br />Additional Soil and Groundwater Sample Work Plan, Page 3 <br />BNSF Mormon Yard, Stockton, California <br />11M1Nybnsf2bnsfwpIwp1201811899020 00 mormon_yardlwork_plan_rdlappa_soghycirpushdrive acpt chng_wp doc