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� v <br /> of in a timely and appropriate manner after review$ng the <br /> analytical results and obtaining agency approval. The storage <br /> area will be posted with a sign indicating the source and <br /> contents of each pile or drum. <br /> Groundwater will be monitored in accordance with WaterWork's <br /> QA/QC Plan. Subsequent to installation and well development, <br /> water samples will be collected from the monitoring well after <br /> purging a minimum of four well volumes (casing and sandpack) from <br /> each well. Stabilization of EC, pH, and temperature will be <br /> checked after purging and before and after sample collection to <br /> ensure samples collected are representative of formation water. <br /> The purged water will remain on-site, in secured 55-gallon drums, <br /> until laboratory results are received. A proposal for treatment <br /> or disposal of the water produced during development will then be <br /> prepared. Water sample collection and preservation will be in <br /> accordance with WaterWork's GA/QC Plan. Bailers with bottom <br /> emptying devices to reduce volatilization will be used. The <br /> water samples will be analyzed by Applied Analytical for BTEX and <br /> TPHG by appropriate EPA and DHS methodologies. <br /> During well development/purging, drawdown will be monitored in <br /> order to estimate formation transmissivity. This data will be <br /> used along with the lithologic descriptions to assess contaminant <br /> pathways and velocities. <br /> All site activities involving potential contact with hazardous <br /> materials (i.e. gasoline contaminated soils) will be conducted in <br /> accordance with WaterWork's Health and Safety Plan. A problem <br /> assessment report will be prepared according the RWQCB guidelines <br /> summarizing the findings of the investigation and recommending <br /> remedial action alternatives, as appropriate. The field <br /> investigation will be conducted under the direct supervision of <br /> Russell W. Juncal, California Registered Geologist No. 3864 <br /> and/or Nora H. Kataoka, California Registered Civil Engineer No. <br /> 38322. The appropriate individual will review and sign the <br /> assessment report. <br /> Completed Applications for Permit and filing fee are attached to <br /> this addendum. If you have any questions or wish to discuss this <br /> matter, please contact me at your earliest convenience. <br /> Respectfully, <br /> WaterWork Corp. <br /> Nora H. Kataoka <br /> Registered Civil Engineer <br /> No, CA 38322 <br /> NHK/kj <br /> pc: Mr. Bill Neuman, BJJ Co. , Inc. <br /> Regional Water Quality Control Board, Central Valley Region <br />