WORK PLANS - Laserfiche WebLink

Home Browse Search

Groundwater Well Development Field Standard Operating Procedure SWE-FSOP-602;Revision 1 Ahtna Southwest Environmental Operations Monitoring Well. A well that provides the collection of representative groundwater samples, the detection and collection of representative light and dense nonaqueous phase organic liquids, and the measurement of fluid levels. Mudwall. A layer of fine-grained soils formed around the boring annulus during drilling can impede the formation water's free flow into a well. Piezometer. A tube placed in soil to depths below the water table extends to the soil surface and opens to the atmosphere. The bottom of the piezometer is perforated or slotted to allow groundwater water under positive hydrostatic pressure to enter the tube. Surging.A well development technique in which a surge block is alternately raised and lowered within the well casing or screen to create a strong inward and outward movement of water through the well screen. Surging helps remove fine-grain material from the boring wall and the filter pack. Turbidimeter. An instrument measuring the turbidity (the cloudiness or haziness of fluid caused by individual particles) of a liquid. Well Casing. A durable pipe placed in a borehole to prevent the walls of the borehole from caving in, and to seal off surface drainage or undesirable water,gas,or other fluids, and prevent their entrance into the well. Well development.The act of removing fine-grained sediment and drilling fluids from the sand pack and formation in the immediate vicinity of the well, thus increasing the porosity and permeability of the materials surrounding the intake portion of the well. Well Screen. A perforated, wire-wound, continuous wrap, or slotted casing segment used in a well to maximize the entry of water from the producing zone and to minimize the entrance of sand and fine particulates. 2.0 Relevant Documents Standard Operating Procedures • SWE-FSOP-001, Field Documentation • SWE-FSOP-101, Water Quality Measurements • SWE-FSOP-102, Groundwater and NAPL Measurements • SWE-FSOP-801, Equipment Decontamination • SWE-FSOP-802, IDW Management Field Forms • SWE-FFRM-004, Daily PFAS Sampling Checklist [PFAS Projects] • SWE-FFRM-402, Well Development • SWE-FFRM-501, Water Level/NAPL Measurements • SWE-FFRM-801, Equipment Calibration Page 6 of 11