ARCHIVED REPORTS_XR0006308 - Laserfiche WebLink

Home Browse Search

rr SIERRA SES STANDARD OPERATING PROCEDURE GROUND WATER SAMPLING - QUARTERLY MONITORING The following describes sampling procedures used by SES field personnel to collect and handle ground water samples Before samples are coilccted careful consideration is given to the type of analysis to be performed so that precautions are taken to prevent loss of volatile components or contamination of the sample and to preserve the sample for subsequent analysis Wells will be sampled no less than 24 hours after well development Collection methods specific to ground water sampling are presented below Prior to sampling, each well is checked for the presence of free-phase hydrocarbons using an MMC flexi-dip interface probe Product thickness (measured to the nearest Q O1 foot) is noted on the sampling form Water level measurements are also made using either a water level meter or the interface probe The water level measurements are also noted on the sampling form Prior to sampling each \�ell is purged of a 01 LI-11 ce well casing volumes of water using a steam-cleaned PVC bailer or a pie-cleaned puillp t ennpei at uie pH and cicc_u ic,i l condueLivity are measured during puigini; Puigino is continued until these paralzieters have stabilized for consecutive readings Ground water saizlples are collected from the wells with s€earn-cleaned Teflon bailers The water samples are decanted into the applopi rate (,or)tarriei lui the_ to be perfririiizd 1'1 preserved sample containers may be used or Llie analytic laboratory innaN add preservative to Llie sample upon arrival Duplicate sainnpies a e collected horn each well as a back-up sample anti/or to provide quality control The samples aie labeled to include the project number sainple lD date pieservative and the field per-,ou 5 mit alis i he 5aniplcs ai e phnced ui pol�rethvlelie bIgS incl in an ice chest (marnLained it 1 C t i!h blur ice' r>r i L} lei lr ov1;I) art uiuiri els iuI of c r��t�icl� lei t1r< laboIaLon The chain of custody form include-, the prol(ct number analysis rec{uestcd saniplc ID date analysis and the SES field I h� forin r,; Sr nc d <ind dated (with the r Lime) by each person who vield, t11 ti,unple-, b(0liiniiir; v�rt1n Llie field pLr�iiiiiic i itul ending with the laboratory pei sonny i i I