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R' MEN I. OEM, y <br /> e <br /> 3-3 GROUTING OF SOIL BORINGS <br /> i <br /> After the soil borings had been drilled to 55 feet and the final <br /> samples collected at 55-60.5 feet, the holes were f!A led with a <br /> neat cement grout. E. Ratliffe of the SJLHD was on site to <br /> witness the mixing and pouring of the grout. SB5 was filled with <br /> cement mixed in a mud tub by the Rvilhaug drill crew, and SB6 and <br /> SB7 were filled using cement ordered from Nelson Redi-Mix <br /> Concrete of Stockton. On the basis of volume calculations for an <br /> I' <br /> 8-inch boring 55 feet deep, the borings were expectea to hold 19 <br /> i cubic feet of cement. SB5 was filled using exactly this amount; <br /> I and .SB6 and SB7 held slightly more than this, probably because <br /> those borings intersected tank fill material that had voids into <br /> ^-, which the cement seeped. <br /> ' 3 4 GROUNDWATER SAMPLING <br /> As .a continuation of the ongoing water chemist. ;monitoring for <br /> the site, EA personnel scheduled sampling off. the <br /> p g gra anL":,at.er fr0n <br /> the five monitoring wells for 19 July ;r8 �' : F�'is were <br /> gauged, and. it was discovered that MW5 w s . t-:p)dtely dry, <br /> `contained only:. moist 'mud at 'theboth, and t W3; _�,,-,ta_.ned �pss <br /> ,r) <br /> than: ,l foot of water. M4V4 and MW5 comI nod l e s�rrp�.,�� �. VOA <br /> sample .vial was filled with water fr6si MWS "qct the 46�31 could � <br /> j riot be':properly. purged .prior to col ;ec¢aan 61 tht, <br /> wat.,r sample. { <br /> MW1 and .MW2'r, having been completed at I -1t { <br /> as Opposed.to a0 . ! <br /> feet. for the other three wells) , were prapr'y purged and sampled <br /> using standard EA water sampling procedures as outlined above in . <br /> section 2.4.:. <br /> r 1 <br /> e <br /> NMI <br /> .. _, e25/71050/.8-89/txt. 14 <br /> i <br /> L � <br /> _ AS <br />