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o ULUHGE DEUKMEJIAN,Governor <br /> CALIFORNIA REGIONAL WATER#ALITY CONTROL BOARD— • <br /> CENTRAL VALLEY REGION 'A <br /> -� <br /> 3443 GOUTIER RaAD � l; <br /> SACRAMENTO,CA 95827-3098 <br /> BETA ASSOC. <br /> SEP 1 -51987 <br /> P'n. RCF.IV <br /> 11 September 1987 <br /> PAGE V ED <br /> RE <br /> Ms. Sharon Ha 1 per SEP ? $ 1g81 <br /> Beta Associates <br /> 2068 Lincoln Avenue TAt HEALTH <br /> San Jose, CA 95112 EN pVERNa <br /> I NMT 5�?,vlCES <br /> INSTALLATION OF MONITORING WELLS AT FORWARD LANDFILL, SAN JOAQUIN COUNTY <br /> (CASE # 2209) <br /> I received a report, dated 25 August 1987, which contains a monitoring well work <br /> plan for the ash disposal project. You may install the wells as described in <br /> the report with the following revisions. The screens for both the upgradient <br /> and downgradient wells should be no longer than 20 feet. I understand that the <br /> ground water level at the south end of the site has dropped considerably during <br /> this dry#year and is at 60-65 feet below the ground water surface. Since many <br /> of the existing monitoring wells on the site are screened between 50 and 70 feet <br /> from the ground surface, I think that the two new wells should have similar <br /> screen intervals. Let me know if you find that ground water is much deeper than <br /> anticipated and we can set different screen elevations. <br /> The downgradient well is on the edge of the ash waste management unit that will <br /> be used as a tipping pad. Although the well will be installed in a Christy box, <br /> I think it would be prudent to move the well location 10 or 15 feet to the north <br /> edge of the grave access road. Until a new monitoring plan is developed, <br /> hopefully by March, the quarterly sampling you listed on Page 3 will be <br /> sufficient. <br /> If you have any questions, call me at (916) 361-5737. <br /> p4ee*-, 9 r4 c <br /> TIMOTHY . CRANDALL <br /> Project Engineer <br /> TAC:Jj <br /> cc: Mr. Greg Basso, Forward Inc. , Stockton <br /> Ms. Lisa Brown, San Joaquin County District Attorney's Office, Stockton <br /> Ms. Carolyn Richardson, California Farm Bureau Federation, Sacramento <br />