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Subsequent to installation and well development, water <br /> samples will be collected from the monitoring well after <br /> purging a minimum of four well volumes (casing and sandpack) <br /> from each well. Stabilization of Ec, pH, and temperature <br /> ' will be .hacked after purging and before and after sample <br /> collection to ensure samples collected are representative of <br /> formation water. The purged water will remain on-site, in <br /> secured 55-gallon drums, until laboratory results are <br /> received. A proposal for treatment or disposal of the water <br /> produced during development will then be prepared. Water <br /> sample collection and preservation will be in accordance <br /> 0„ with WaterWork's QA/(fir plan. Bailers with bottom emptying <br /> devices to reduce volatilization w-11 be used. The water <br /> samples will be analyzed by Sequoia Analytical for BTEX and <br /> TPHG by appropriate EPA and DHS methodologies. <br /> During well development/purging, drawdowns will be monitored <br /> in order to estimate formation transmissivity. This data <br /> " will be used aiong with the lithologic descriptions to <br /> assess contaminant pathways and velocities. <br /> All site activities involving potential contact with <br /> hazardous materials (i.e. gasoline contaminated soils) will <br /> � be conducted in accordance with WaterWork ' s Health and <br /> Safety Plan (Appendix .III ) . A problem assessment report <br /> will be prepared according the RWQCB guidelines summarizing <br /> � the findings of the investigation and recommending remedial <br /> action alternatives, as appropriate. The field <br /> Investigation will be conducted under the direct supervision <br /> of Russell W. Juncal, California Registered Geologist No. <br /> 3864 and/or Nora H. Kataoka, California Registered Civil <br /> Engineer No. 38322. The appropriate individual will review <br /> and sign the assessment report. <br /> „4, w <br /> 7 <br />