Laserfiche WebLink
28 April 2005 <br /> AGE-NC Project No 97-0351 <br /> Page 8ofII <br /> chain of custody procedures to a DHS-certified laboratory for analysis for the constituents listed in <br /> Section 3 2 Each sample sleeve will be labeled with the boring designation, depth,time, date, and <br /> sampler's initials Soil encountered in the borings will be visually classified by an AGE geologist in <br /> accordance with the Unified Soil Classification System(USCS) Additionally, soil samples will be <br /> field-screened for the presence of volatile organic compounds using an organic vapor meter(OVM), <br /> equipped with photo-ionization detector(PID) Soil sample descriptions and OVM readings will be <br /> recorded on a log for each boring <br /> 4 12 Grab Ground Water Sampling Procedures <br /> The soil borings will be advanced to the top of the ground water table, as identified by collection of <br /> a saturated soil sample, to collect a grab ground water sample Once ground water has been <br /> encountered, samples will be collected with a hydropunch water sampling assembly, a 1-inch <br /> diameter polyvinylchloride (PVC) casing with a 5-foot long, 0 010-inch slotted well screen at the <br /> lower end will be temporarily installed in the borehole and a grab ground water sample will be <br /> collected by lowering a Teflon hose-bailer through the hollow center of the push rods into the <br /> • screened section In addition, grab ground water samples will be collected at total depth from three <br /> soil borings to assess the vertical extent of contamination <br /> Ground water samples will be transferred into laboratory-supplied,40-milliliter(ml)volatile organic <br /> analysis(VOA)vials containing 0 5 ml 18%hydrochloric acid solution as a sample preservative,and <br /> 1-liter amber bottles without preservative Following collection, the samples will be appropriately <br /> labeled,placed in a chilled container,and transported under chain of custody procedures to a DHS- <br /> certified laboratory for analysis for the constituents listed in Section 3 2 <br /> 42 MONITORING WELL INSTALLATION PROCEDURES <br /> Utilizing a CME-75HT truck-mounted hollow-stem drill rig equipped with 8 25-inch diameter <br /> hollow-stem augers,the three pilot soil borings will be advanced to a depth of 20 feet bsg Relatively <br /> undisturbed soil samples will be collected from each soil boring at 5-foot intervals using a California <br /> modified split-spoon sampler fitted with 2-inch diameter,6-inch long brass sleeves Upon removal <br /> from the sampler,the sample sleeves will be separated with a knife The exposed ends of the second <br /> sleeve will be covered with Teflon sheets,capped,and sealed with tape Soils sampled in the borings <br /> will be visually classified by an AGE geologist in accordance with the USCS Additionally, soil <br /> samples will be field screened for the presence of volatile organic compounds using an OVM <br /> equipped with a PID Soil sample descriptions and OVM readings will be recorded on a log for each <br /> boring <br /> Advanced GeoEnvironmentsi,Inc <br />