WORK PLANS - Laserfiche WebLink

Home Browse Search

CLEARWATER G R O U P, I N C. • recorded on the field log. The soil sampler will be decontaminated prior to each sampling event. 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 either a photoionization detector (PID) or 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. The first boring will be continuously cored using a five-foot-long continuous . core barrel that is pushed through the subsurface. Descriptions of the continuous core and field screening for organic vapors will be conducted as described above. The number of soil samples to be submitted to the laboratory for analysis will be based upon the results of organic vapor screening and field observations; the criteria for selecting laboratory samples will be directed by the PHS staff. If submitting a cost estimate for implementation of this workplan, submit a unit price for TPHg and BTEX analyses on soil boring samples only (on a per sample basis). Monitoring Well Construction Depth to groundwater is unknown because there are no monitoring wells at the site. However, Ms. Margaret Lagorio states that the depth to groundwater is currently about 38 feet bgs at two sites located within 0.6 mile of the site. 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. Other well construction specifications are as follows: • Total depth of each monitoring well will be 10 feet below the depth to groundwater (encountered while drilling) D108 WP (revised)1/96 5