ARCHIVED REPORTS_2012_3 - Laserfiche WebLink

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Sampling And Analytical"Protocol The following protocols have been developed to increase the accuracy and comParabilit groundwater monitoringdata The Y-of the Purposes of estabtis ° and following, field protocols •(1) to reduce sources of error that can be introduced during arc sampling and, t® +collect sum In a consistent manner so that data sets arc'comparable_ pies The,_ Protect goats for cnmparabitity .and accuracy include following the duces deurl°bea in this section to the Cxtent-Possible. When field conditions necessitate a change from,the established protocols, the neccssary changes will be implemented with maintenance of sampling:accuracy and data set ,Comparability as priorities. Airy modification to the standard Procedures delineated in this protocol necessitated by field conditions and the-reasons-will be noted on the Technicians Daily Report(See Section 2.7)_. Depth To Water Measurements Depth to water measurements will be made in all_the wells at the site prior to initiating purging andPzamling, including-wells that.are not to be sampled .The measurements Will be made fou, tunes a year prior to initiating each sampling round ?here are no piezometers at the site She depth to water measurements will be made consecutively,in-as.short a time as po=-bl,, io reduce.: � potential errors due to daily variations in the water table- Depth-to-water. (DTW} will be measured .in the well to within 11100 of a foot using a conducxivity-based water level indicator.- Measurements will be taken from the north or ruarked side of the top of casing of each well. These marks on the casings have been surveyed by a stu-vey relative to M=m sea level ). wells with dedicated Pun 4n,the water level Probe is inserted into the well through a special hole in the well cap. The conductivity probe and cable-Will be rinsed in deionized water before and af3ca-m the fim.well, and-after each subsequent well. The same water level indicator will be used in each well. Depth to water InemIrern,ant will be recorded on a field observation-sheaf.. Monitoring Well Purging prior To Sampling Groundwatcr•samplcs will be.collected from wdsting monitoring wells at Forward Landfill after Pig the wcr,stan&g in the well° This water will be purged using either dedicated Pumps or*aSP44W Purgepumpthat is daconbminated between each wilt. The following Proccdtn c will be used to purge the waW sWxbg in the welt prior to=mpling the wells: _ l 849-Fo 312310 A-6 My 14,2040 COO-A&200 Kk&tMda,Inc.