ARCHIVED REPORTS_XR0012599 - Laserfiche WebLink

Home Browse Search

RV 0711, -10' to -15' , brown, silty sand, me(liLlm to fine-grained with some interspersed cla y,' from -15to -20' , stiff, tan clay, moist near bottam: from - 201 to -25 ' , light brown, moist, clayey sand. There was no obvious water table. From -25' to 26 1/2' , rcedium zlense clay, tan color, in core barrel . From -2.6 1/2' to -351 , sandy, silty clay, moist. Almost no cuttings returned to surface in this interval . Margaret Lagorio, EHD, was on site at 11 :30 AM. 4" , screw joint, scfledule 40, FVC casing was run from -35 ' to surface, perforated -35' to - 20' , gravel packed with # 3 Lonastar gravel from -35' to -17" , bentonite pellets placed from -17' to -141 , hydrated by pouring water into annulus, cement grouted from --14' to surface with 3% bentonite cement rnix. Purging and Capping Wells All three wells were developed by awabbing each for about 15 minutes, using a hard rubber disk fixed to a metal rod and reciprocated by a line and cat head. All three wells were bailed after swabbing, about 36 oallons from each. The bailed water was placed .in 55 gallon drums, sealed and left on site. MW # I was partially bailed using a vacuum pump, but the well pumped off after about 12 gallons had been removed and the remainder of the 36 gallons was removed using a 3" bailer, (5 standing water level casing volumes total about 33 gallons) . Diversified Well Products 14" diameter, metal cap, well vaults were installed on each well by hand cementing in place. MWSS-,T type, 4" expandable locking caps were placed on each well head. The high point of each well head was marked by pen and by filing a notch; this mark is to be used as a survey and water level recording reference point. The final capping of the last well was witnessed by R. Thorpe, 1 inasmuch as D. Allen had to leave the site in order to reach FGL laboratories before their closing time. SAMPLING SPOIL ILE The spoil piles shown on Figure 4 of attachment 1 had been mixed together into one pile, as shown on Figure I of this report. Because the only contaminates found had been volatile hydrocarbons, it was thought that sampling the spoil was worthwhile with regards to future filling of the excavation or for disposal . M. Lagorio witnessed the sampling and suggested that five samples be taken. R, Thorpe and D. Allen took the samples as shown on Figure 1 . These samples were added to those from MW # 3 in the cooler chest. Separate Chain-of-Custody (C-O-C) forms were filled out for these tests. All C-O-C forms for all sample collecting are attached. 5 I I