Laserfiche WebLink
'4 .! <br /> i� <br /> Woodward-Clyde <br /> r <br /> 2.3 agit ; oint immediately above the <br /> Soil samples were recovered by advancing the augers to a p <br /> sample interval and tttien driving a modified Californiasampler then wr with inched out oflean brass the <br /> tubes through the hc•Slow stem of the auger. The P plastic end <br /> auger string and the sample tubes rem oved tubewrtn led eth each interval wasllon sheeting d retained for <br /> caps. Generally the second of the threeSample <br /> chemical analysis. The soil samples were delivered tourWid C Chaia off-Cuslodyr control. <br /> Pleasant <br /> Pleasant Hill, California for TPH and BTEX analyse Appendix B. Soil samples w^re <br /> The completed chain of custody forms are included in hotoianizatian <br /> visually inspected in the field for hydrocarbon stains and odor$eiected An u pholoiosampli were <br /> detector was used to check sail samples for o�alon teanic r probe was inserted to check the <br /> sealed in plastic bags, shaken, and the P were found to have a distinct <br /> headspace for organic vapors. Only a few soil sampleshave <br /> a distinct <br /> hydrocarbon odor or yielded a non-zero reading when tested with the p <br /> detector.The levels of vapors encountered in HHu units are shown on the log of borings <br /> in Appendix C. <br /> 2.4 i r <br /> Groundwater morritoring wells MW-5. -6' <br /> _7 _g, and 9 were constructed in the soil <br /> borings at the completion of drilling. The wells were constructed with 4-inch diameter ated <br /> PVC casing. The completed wells were constructed withfOO67t Leto the f feet below <br /> PVC casing with 0.020-inch slotted screen extending from <br /> l of each boring was <br /> grade. The annular space between the slotted ca elg 3 nd the to 4 feet walabove the perforated <br /> backfilted with too. 3 Monterey sand to approxi Y <br /> section. A 1- to 2-cool bentonite plug was placed above the sand pack and hydrated with <br /> lle <br /> to the <br /> acepotable water. The annular space from the top of the bent pi`alant, 3oaquground <br /> o <br /> irtGoduntyrfwell <br /> was filled wits, neat cement grout under the Supervision <br /> inspector. The wells were completed with water-lightnloFief'9 0�borings irrs and ltAppenfdix <br /> rated vault boxes.The well construction is summariz <br /> A. <br /> , of the well casings <br /> 2.5 <br /> July 3, 1990 WCC surveyed the vertical elevations <br /> ofol well Of 7. <br /> using a relative datum of •r10Water levels <br /> 0.D0 leaf placed on the top <br /> esults are sUmm8flzed in <br /> were also measured using an electric sounder. Theter levelurvey relevalions summarized in <br /> Table 2 below. Figure 9 is a <br /> plot of the ground wa <br /> G <br />