Laserfiche WebLink
0°3C3=? :0?[ OF 'iO3K <br /> On 30 and 31 October 1986, A='`C drilled t':ree shallow groundwater <br /> monitoring wells with a ten ;nch hollow stem auger at the loca- <br /> tions shown on Figure 2. The borings were logged using a <br /> continuous coring device. Geologic and completion logs are <br /> included as Appendix 1. Groundwater was encountered at 9.5-11.5 - <br /> feet below ground surface (BGS). The ten inch diameter borings <br /> were terminated in moist, silty clay at 21.5-23.5 feet BGS. The <br /> wells were constructed with 15 feet of 0.01 slot four inch diam- <br /> eter PVC screen, approximately ten feet of which was placed <br /> below the water table. A six inch screw-on bottom cap was in- <br /> stalled at the bottom of the screen. Monterey 1-20 sand was <br /> poured into the annulus of the boring, creating a filter pack <br /> from the bottom of the boring to one to two feet above the <br /> screened section. One and one-half to three feet of bentonite <br /> pellets were placed above the filter pack and hydrated. Neat <br /> cement grout was poured into the annulus which was then filled to <br /> ground surface. The wells were completed by placing an eight <br /> inch diameter locking steel casing into the wet grout. <br /> The well locations and elevations were surveyed by Nolte and <br /> Associates on 5 November 1986 . <br /> On 7 November 1936 , all wells were developed by surge block and <br /> pumping. All wells were checked for free, floating product with <br /> a clean bailer. No free product was found. After development <br /> and purging, water samples were taken with a stainless steel <br /> 2 <br />