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Monitoring P P Re ort Compliance CO'cklist <br /> Discharges Regulated by Title 27 and/or Part 258 <br /> RWQCB <br /> Reference Parameter Yes No N/A Reviewer Comment <br /> WDRs/MRP/ Groundwater Monitoring <br /> Standard <br /> Provisions 1. Are all groundwater Field Parameters X <br /> (Sept 93/Aug 97) Monitoring Parameter, and COCs <br /> (if required)samples and analyzed? <br /> in. Have any groundwater concentration X Increasing trend of chloride in <br /> limits been exceeded? If yes,identify well MW-2. <br /> in comments. <br /> n. Is there a description and graphical X <br /> presentation of groundwater flow <br /> direction and gradient? <br /> o. Monitoring Wells: Is there a X Recorded the recovery at well <br /> description,method, and time MW-4 for first 5 minutes after <br /> of water level measurement and purge,need the others. <br /> well recovery time? <br /> p. Purging: Is there a description X Dedicated purge and sample <br /> of the purging method,purge pumps. <br /> pump and its placement,and <br /> field parameters? <br /> Additional Comments and Recommendations: <br /> Monitoring well MW-2, located on the east side of the landfill and a cross gradient well,has an increasing <br /> trend of chloride, though still at 18 ppm. No VOCs were detected. Also,no VOCs were detected in well <br /> MW-1. County submitted this data as the previously requested retest. Therefore,VOC release is not <br /> confirmed and amended ROWD and EMP previously requested are not necessary. <br /> Well MW-2 is also near the areas of noted subsidence that require repair. <br /> The county is making repairs and upgrades to the landfill gas extraction system and proposes continued <br /> monitoring to determine if sporadic VOC impacts to groundwater are mitigated. <br /> Landfill cover subsidence noted. County should submit a workplan and their schedule for repairs that will <br /> adequately prevent ponding on the landfill cap. Our 18 August 1999 letter indicated that repairs should be <br /> made prior to 31 October 1999. <br /> Purge rate is approximately 1 gallon per minute for each well. MW-4 had 6 feet of drawdown, others had <br /> minor or no drawdown. <br /> RWQCB Staff Signature: <br /> Date: <br />