Laserfiche WebLink
19 September 2001 <br /> AGE-NC Project No. 01-0872 <br /> Page 6 of 6, <br /> 4.3. GRAB GROUND WATER SAMPLING AND ANALYSIS <br /> For the collection of`grab' ground water samples,selected probe borings will be advanced to a depth <br /> of four feet below the ground water surface. The grab ground water samples will;be collected using <br /> a Geoprobe water sampling assembly with a wire-wound steel screen.or a pre-cleaned one-inch <br /> diameter,0.01-inch slotted screen.Each ground water sample will be extracted by.lowering a Teflon <br /> bailer through the hollow center of the push rods into the screened section.Samples will be collected <br /> into laboratory-supplied, 40-m1 VOA vials containing 0.5 ml hydrochloric acid as sample <br /> preservative and into one-liter amber bottles-without a preservative.-The labeled containers will be <br /> placed in a chilled container under ice and transported under chain-of:custody to a DHS-certified <br /> laboratory.- <br /> 4.4. <br /> aboratory:4.4. EQUIPMENT DECONTAMINATION _ <br /> Prior to use,all sampling tools used for sample collection will be thoroughly rinsed with clean water <br /> after being washed with a solution of Alconox. All probing rods will be cleaned prior to <br /> advancement at each probe boring location. <br /> 4.5. BORING ABANDONMENT . <br /> All soil borings will be permanently sealed to prevent vertical migration of potential contaminants. <br /> Soil borings shall be abandoned by backfilling with a cement slurry from the total depth to surface <br /> grade. The PHS-EHD will be notified for grout,inspection at.least 72,hours prior to conducting <br /> grouting procedures. <br /> Advanced GeoEnvironmental,Inc. <br />