ARCHIVED REPORTS XR0012568 - Laserfiche WebLink

Home Browse Search

-. °xm ,� .'� :;« ' ^ .,, _ 4' +•r�. ,r ""''"" `". '. _ ,a material below the water table, suspected to be of lower permeability; _ whichever was less deep. Undisturbed soil samples were obtained using the Dares & Moore Type-U sampler driven by a 140-pound i.ammer falling 30 inches, Samples were collected from the borings at minimum irtervdls-of five feet. The clean sampler was driven into the soil beneath the open borehole. The soil samples retained in the 3-inch stainless steel tubas were reme ved from the sampler and their ends sealed with teflon cembranes Pnd plastic and caps. Ech sample selected for chemical analyals was securely sealed, labeled and stored in ice cooled containers and delivered to Sio National -, Corporation under proper chain•of-custody. t11 samllas were logged according to the Unified Scil Classification System (Appendix A), To prohibit cross-contamination of successive samples, the sampling equipment was disassembled between sampling attempts and washed with a tri- sodium phosphate (TSP) soap solution and thoroughly rinsed with deioaized water. The samplers were thFn reassembled with clean 3•1nch stainless steel tvLes and then used for subsequent sampling. All. augers and sampling equipment were thoroughly otesm-zleaned bet=ween hor•ings to prey+nt cross- i:_ contamination. 3.2 Ground Waternvest�Qatin�y _ IT The purpose of this investigation was to: o Evaluate the depth rf ground water; _ 6- ,r o ivaluate the � ounti-Stater gradient; and o E=valuate the Lydrocarbons in the ground wat r. 3.2,1 Ohservatlgn Weil T stallatfoD Four. ground water- observation wells were instal'a d a4 the facility. , The wells were installed for water level monitoring :and ground 'water w sampling purposen. Thewfollowing procedures were used Zor oaservation well insCallation: SAC01,014 _ 4 January -1, 19C9 me