Laserfiche WebLink
MONITORING WELL PURGING PROTOCOL <br /> MEASURE AND RECORD DEPTH TO WATER <br /> AND WELL TOTAL DEPTH <br /> CALCULATE PURGE VOLUME BY <br /> USING THE FOLLOWING EQUATION: <br /> P= n r2hx7.48x4 <br /> where: <br /> P =calculated purge volume (gallons) <br /> 11 =3.14 <br /> r = radius of well casing in feet <br /> h = height of water column in feet <br /> EVACUATE WATER FROM WELL EQUAL TO <br /> THE CALCULATED PURGE VOLUME WHILE <br /> MONITORING GROUND-WATER STABILIZATION <br /> INDICATOR PARAMETERS <br /> (pH, CONDUCTIVITY, TEMPERATURE) <br /> AT INTERVALS OF ONE CASING VOLUME. <br /> WELL EVACUATED TO PRACTICAL LIMITS <br /> OF DRYNESS BEFORE REMOVING <br /> CALCULATED PURGE VOLUME <br /> NO YES <br /> FINAL TWO SETS OF GROUND-WATER <br /> STABILIZATION INDICATOR PARAMETER <br /> MEASUREMENTS MEET THE FOLLOWING WELL RECHARGES TO A LEVEL <br /> CRITERIA: SUFFICIENT FOR SAMPLE <br /> pH = = 0.1 pH units COLLECTION WITHIN 24 HOURS <br /> COND. = 10% OF EVACUATION TO DRYNESS. <br /> TEMP. = _ 1.0 °F <br /> YES i <br /> YES NO <br /> —r— c � — <br /> WELL PURGING CONTINUE PURGING; FIELD TEST FIRST RECORD WELL <br /> CRITERIA MET: EVACUATE ADDITIONAL RECHARGE WATER FOR AS DRY FOR <br /> PROCEED TO CASING VOLUME OF INDICATOR PARAMETERS, PURPOSES OF <br /> WELL SAMPLING WATER. MONITORING THEN PROCEED TO WELL SAMPLING. <br /> INDICATOR PARAMETERS SAMPLING. <br /> FOR STABILITY. <br /> 7;R; <br /> MAJIN <br /> MONITORING WELL PURGING PROTOCOL <br /> Associates <br />