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2.0 GROUNDWATER MONITORING WELL SAMPLING METHODOLOGY <br /> 21 Groundwater Measurements <br /> ' Depth to groundwater measurements were made on March 7, 1994 using a Slope Indicator <br /> Company, water level irndicator Model No 51453 The depths were measured from the top of <br /> ' the surveyed well casings Groundwater measurements collected by Park during this and <br /> previous investigative efforts are presented in the following table <br /> GROUNDWATER MEASUREMENT DATA <br /> i <br /> � m'�«�',y'"� "--'xT y. .oxo�x���.,-xgsr ;4"���, �� wrw,.�.�--.. z�„ '_` '• .;✓, r" t ,. eco x °7 rimer r�.- g' "' <br /> DateaE1evaEionF a De th to <br /> � �_` �, ��,� �� � p , �. �w�ib � Elevation=of <br /> r wl�llinll�£r° risme w 1 eaS1IIeC� }`'3 ✓ Y 7 6n W Y r, A <br /> , x .. a z� � Topaof,Castng �_�e,Gr`ouiidwater" Groundwater,: <br /> 1 <br /> ' MW-1-P 9129192 2545 7641 -5096 <br /> 1125/93 7644 -5099 <br /> 6/30193 73 96 -48 51 <br /> 9/15/93 7504 4959 <br /> 1/28194 73 80 -48 35 <br /> 317194 73 08 -,4763 <br /> ' MW-2-P 9/29/92 25 65 7633 150 68 <br /> 1125193 7593 -5028 <br /> 6130/93 7360 4795 <br /> 9/15/93 7489 ;49 24 <br /> 1/28/94 7337 4772 <br /> 317/94 7261 -,4696 <br /> MW-3-P 9/29192 2505 75 11 -50 06 <br /> 1 1125/93 7549 -5044 <br /> 6/30/93 73 11 �8 06 <br /> ' 9115/93 7420 -49 15 <br /> 1/28/94 7296 -4791 <br /> 317/94 7207 -4702 <br /> ' MSL - above mean sea level <br /> ' 2.2 Monitoring Well Purging <br /> ' Each monitoring well was purged with a 4-mch submersible pump until at least three <br /> equivalent well volumes of water had been removed All purging and sampling equipment was <br /> washed in an Alconox solution and rinsed with distilled water prior to each usage to reduce the <br /> ' potential for cross contamination between wells As groundwater was removed from the <br /> wells, pH, temperature and conductivity were monitored and recorded on a field data sheet <br /> These field documents are kept in, a permanent project file The wells were allowed to stand <br /> go for a period of time to regain equilibrium prior to sampling Groundwaters purged ifrom the <br /> 5007 J3 2 <br /> 1 <br />