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a <br /> r <br /> : <br /> 1 <br /> cement/bentonite mixture. After well RW-1 is abandoned, <br /> groundwater floss at the site will be controlled on an interim <br /> basis by pumping groundwater from well MW-19 and through the air <br /> W-1b, MW-17 , MW-18, and MW-21 will be <br /> stripper. Wells MW-14, M <br /> redrilled as wells for zones 3 or 5. See Table 5 and Appendix E <br /> for location and construction details. <br /> AQUIFER TESTING <br /> After completion of the Site Preparation work , several new wells <br /> i <br /> may be drilled and rigorous hydrological tests, (described in the <br /> following paragraphs) , will be conducted before new drilling and <br /> bioremediation are begun. New hydrological tes are needed <br /> because earlier tests did not provide good data to <br /> interconnected wells and poor experimenta `r gn. 'Accurate <br /> hydrological data is essential to deli 1 system which <br /> accurately controls the flows of ,•c to at d groundwater and <br /> nutrient solutions for bioremed ,,•'Protocols for pump <br /> testing are found inAppendix i <br /> s We recommend that initial tes ing and remediation work be focused <br /> on zone 3, which appears to contair, almost all of the <br /> 3 <br /> contamination. ".'We also recommend that zone 5 should not be <br /> reinediated until':zone" 3 is clean in order to <br /> avoid the potential <br /> a for introducing contamination into zone 5. <br /> The first pump test is"designed to help confirm the existence of <br /> E <br /> P `s a :postulatedpaleo-channel cross-connecting zones" 3 and 5 in the <br /> SEI Sid. corner of" the site. We propose to clean out and redevelop <br /> we11 MW:-15 so that it can be pumped using a 1 1/2" diameter' <br /> �✓ hose with a perforated base inserted. from Che surface. We.will <br /> electronically monitor--MW-1A.. and plot drawdown vs, time. if a -- --.--- --- -- — <br /> .y tl Yl/14 <br /> A {,q r r` i yRa 'Sa ssi ar-o"� c,Al <br /> Ja <br /> 3 l S <br /> rx3sv�,c <br /> its ; 9 <br /> Ej <br /> ; <br /> `t t <br /> r )F XYx <br />