Laserfiche WebLink
17 September 2001 <br />AGE -NC Project No. 01-0861 <br />Page 5 of 5 <br />4.3. GRAB GROUND WATER SAMPLE PROCEDURES <br />For the collection of `grab' ground water samples, probe borings will be advanced to a depth of four <br />feet below the ground water surface, as indicated by collection of saturated soil samples. The grab <br />ground water samples will be collected using a Geoprobe water sampling assembly with a <br />wire -wound steel screen or a pre -cleaned one -inch diameter, 0.01 -inch slotted screen. Each ground <br />water sample will be retrieved by lowering a Teflon bailer through the hollow center of the push rods <br />into the screened section. Samples will be collected into laboratory -supplied, 40-m1 VOA vials <br />containing 0.5 ml hydrochloric acid as sample preservative and into 1 -liter amber bottles without a <br />preservative. The labeled containers will be placed in a chilled container under ice and transported <br />under chain -of -custody to a DHS -certified laboratory. <br />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 Geo Environmental, Inc. <br />