Laserfiche WebLink
The probe tip is then loYrered into the well and submerged In <br /> the groundwater An oscillating(beeping)tone indicates the <br /> Probe is In water The probe is slowly raised until either the <br /> oscillating tone ceases or becomes a steady tone In eRher <br /> case,this Is the depth-to-y,ater(OTW)indication and the OTW <br /> measurement is made accordingly The steady tone indicates <br /> 1laating liquid hydrocarbons(FLH) In this case,the probe Is <br /> slowly raised until the steady tone ceases This Is the depth-to- <br /> Product(OTP)Indication and the DTP measurement Is mala <br /> accordingly <br /> The process of layrsnng and raising the prate must be <br /> repeated several times to ensure accurate measurements The <br /> OTW and DTP measurements are recorded on the hquid-level <br /> data sheet When FLH are indicated by the probe's response, <br /> a product bailer is lowered partially through the FLH-water <br /> Interface to confirm the FLH on the water surface and as <br /> further Indication of the FLH thickness,particularly in cases <br /> where the FLH layer is quite thin This measurement is <br /> recorded an the data sheet as'FLH thickness' <br /> In order to avid crass-contamination of wells during the liquid- <br /> lewl.measurement process wells are measured in the order of <br /> 'clean"to'dirty"(where such information is available) In <br /> addtan,all measurement equipment is cleaned with solution <br /> and thoroughly rinsed with detanized water before use,between <br /> measurements in respective v etls and at the completion of the <br /> days use <br /> i <br /> SOP- Manhoring Wells <br />