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BLAINE TECH SERVICES, INC <br /> METHODS AND PROCEDURES <br /> FOR THE ROUTINE MONITORING OF <br />' GROUNDWATER WELLS AT EXXON STATIONS <br /> Blaine Tech Services, Inc performs environmental sampling and documentation as an independent third parry <br /> We specialize in groundwater monitoring assignments and intentionally limit the scope of our services to those <br /> centered on the generation of objective information <br /> ' To avoid conflicts of interest, Blaine Tech Services, Inc personnel do not evaluate or interpret the information <br /> we collect As a state licensed contractor(C-57 well drilling—water— 746684 )performing strictly technical <br /> services, we do not make any professional recommendations and perform no consulting of any kind <br /> ' SAMPLING PROCEDURES OVERVIEW <br /> ' SAFETY <br /> All groundwater monitoring assignments performed for Exxon comply with Exxon's safety guidelines, <br /> ' 29 CFR 1910 120 and SB-198 Injury and Illness Prevention Program (IIPP) All Field Technicians receive the <br /> full 40 hour 29 CFR 1910 120 OSHA SARA HAZWOPER course, medical clearance and on-the-job training <br /> prior to commencing any work on any Exxon site <br /> INSPECTION AND GAUGING <br /> ' Wells are inspected prior to evacuation and sampling The condition of the wellhead 3s checked and noted <br /> according to a wellhead inspection checklist <br /> ' Standard measurements include the depth to water (DTW) and the total well depth (TD) obtained with industry <br /> standard electronic sounders, which are graduated in increments of hundredths of a foot <br /> ' The water in each well is inspected for the presence of Immiscibles or sheen and when liquid-phase petroleum <br /> hydrocarbons (LPH) are suspected, it is confirmed using an electronic interface probe (e g MMC) If sheen or <br /> ' LPH is found in a well, the Project Coordinator notifies the appropriate party (e g Exxon employee or <br /> consultant) <br /> ' No samples are collected from a well containing sheen or LPH <br /> EVACUATION <br /> Depth to water measurements are collected by our personnel prior to purging and minimum purge volumes are <br /> calculated anew for each well based on the height of the water column and the diameter of the well Expected <br /> purge volumes are never less than three case volumes and are set at no less than four case volumes in some <br /> jurisdictions <br /> Lrpots 809 <br />