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1 <br /> Coca-Cola Enterprises - West <br /> USTEC Job No. 90054.03 <br /> lower sample was used for organic vapor monitoring and sample screening. The procedures <br /> followed for organic vapor monitoring are described in Section 3.1.5. <br /> ` 3.1.2 Groundwater Monitorin and Va ar Extraction Test Well <br /> Construction <br /> Borings B-14 through B-17 were completed as vapor extraction test wells VEW-1 through VEW-4, <br /> respectively. Boring B-24 was completed as groundwater monitoring well MW-6, The <br /> installation permits for each well are presented in Appendix E. The typical groundwater <br /> monitoring well construction details are illustrated on Figure 8 and the typical vapor extraction <br /> well construction details are illustrated on Figure 9. A summary of the boring, groundwater <br /> well construction details is presented in Table 3. <br /> monitoring well,and vapor extraction test <br /> The vapoz'extraction and groundwater monitoring wells were installed through 8 5/8 inch inside <br /> por extraction and groundwater <br /> diameter(1.D.)hollow stern augers. The vamonitor wells were <br /> p <br /> constructed of a single string of 4-inch O.D.,Schedule 40, Flush threaded,PVC well screen and <br /> blank casing. To account for the varying lithology, different screened intervals were used in <br /> each VE well. A partial overlap in screening depths was used to insure complete coverage <br /> within each lithologic unit. Screened intervals for VEW-1,VEW-2,VEW-3,and VEW-4 were 25 <br /> to 45 feet bgs, 8 to 28 feet bgs, 8 to b8 feet bgs,and 43 to 69 ipet bgs, respectively. <br /> A 30-foot length of PVC well screen with a slot size of 0.010 inches was installed in MW-6 to a <br /> depth of 83 feet. Depending upon the screened interval,8 to 53 feet of blank PVC casing was <br /> installed to bring the wells to exisg surface grade. Following the installation of the slotted and <br /> tin <br /> blank PVC casing,the annulus of each well was packed with Number 2/12 RMC Lonestar silica <br /> i-.; sand from the bottom of the borehole to a height of about 2 feet above the top of the well screen. <br /> i+ <br /> :he monitoring well was surged prior to the seal placement to settle the sand pack. <br /> A 2 to 4-foot thick bentonite seal using 1/4-inch bentonite pellets was placed on top of the silica <br /> �• sand pack and hydrated with about 10 gallons of potable water. The remaining annular space <br /> was then sealed with a cement grout(eleven sack mix). All groundwater monitoring and vapor <br /> 1 <br /> 4 10 <br /> t <br /> 5 <br />