ARCHIVED REPORTS_XR0002474 - Laserfiche WebLink

Home Browse Search

CLEAR-WATER K O U P 1 N C Ent,onw,nh.f S,,r— ' be recorded on the boring log All soil sampling equipment will be decontaminated between sampling events to avoid cross-contamination ' Soil removed from the top two brass liners will be used to describe the soil (in accordance with the Unified Soil Classification System) and to screen the soil for organic vapors The field screening equipment used should be a flame ' ionization detector (FID) Results of the field screening for organic vapors will be recorded on the field log ' Soil from the third brass liner will be sealed at both ends with Teflon sheets and plastic end caps If selected for laboratory analysis, the sample tubes will ' be labeled, documented on a chain-of-custody form, and placed in a cooler for transport to a state-certified analytical laboratory Monitoring Well Construction Depth to groundwater is unknown because there are currently no monitoring wells at the site For the purpose of this workplan, groundwater is assumed to be present at a depth of approximately 20 feet bgs The monitoring wells at the subject location should be constructed with 20 feet of screen so that the screen extends 10 feet below first encountered groundwater and 10 feet above first encountered groundwater rOther well construction specifications are shown on Figure 3 and are summarized below ' • Total depth of each monitoring well will be 10 feet below the depth to groundwater (as encountered during drilling) ' 0 Wells will be constructed of 2-inch-diameter Schedule 40 PVC casing and slotted screen I • Twenty feet of screen (0 010-inch slot size) will be placed in each well • A sand filter pack consisting of No 2/12 sand will be placed in the well annulus from total depth to two feet above the top of the screened interval • A bentonite seal two feet thick will be placed over the filter pack (the seal will be made by hydrating bentonite pellets) J I • 1 ' C-178 WP 4117 4