ARCHIVED REPORTS XR0001000 - Laserfiche WebLink

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r� May 24, 1995 - Cost estimates & workplan approved by Fund staff DETAILS OF WORK PERFORMED UNDER APPROVED WORKPLAN ADDENDUM Prior to beginning the work, the locations for the soil borings & monitoring wells were marked and labeled by Wm Hunter, RG, from Wm J. Hunter & Associates. Underground utilities had been previously identified during prior work at the site. On July 5, 1995, Mitchell Drilling Environmental, (MDE,) mobilized a CME 57 auger rig, support truck & decontamination trailer on site, driller was Bart Jurgens & helper was Chris Northard The rig was spotted on the location for monitoring well #4, refer to PLATE X for it's location The rig was equipped with 5 foot lengths of 8 1/4" hollow -stem augers, advanced by a 140 pound drive hammer Coring equipment consisted of two (2), 1811 California Modified split -spoon samplers designed to hold 2" diameter metal tubes While one barrel is being used, the other one will be thoroughly cleaned with an Alconox solution, and rinsed in clean water Metal core tubes will be cleaned in the same way, and placed in the clean barrel, which is set aside until needed This procedure will be followed each time a core is taken After holding a brief safety meeting, and discussing the procedures to be followed, work began at 0915 hours under the supervision of William Hunter, RG, from Wm J Hunter & Associates, (WJH,) assisted by Don Light of Del -Tech Geotechnical Support Surface sediments consisted of cobbles & gravels, grading to brown, slightly sticky clay The first core was taken from 51-616+1, it was laid on a clean plastic surface on the tailgate of Del -Tech s truck & carefully opened Recovery was 15" of gray to brown clay, firm & dry, not plastic The bottom metal sleeve was quickly sealed with teflon tape & plastic end caps, secured with duct tape, labeled and placed on ice in a sealed chest for preservation A portion of the top tube was placed in a plastic ziplock bag, sealed, labeled, and set aside to allow any petroleum vapors to volatize The core was described by the geologist, Wm Hunter, and unused portions placed in metal drums for future disposal After 10-15 minutes, the probe of a field calibrated PID meter was inserted into the plastic bag containing material from the core, and a reading was taken & recorded While the core was being described and preserved, the augers were advanced to 10 feet, a clean core barrel inserted into the flights, and a core was taken from 10'-11}6" as described above k"