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o� <br /> Monitoring Report Compliance Checklist <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 County elected not to do retest <br /> (Sept 93/Aug 97) Monitoring Parameter, and COCs for Cr VI(see their letter 22 <br /> (if required) samples and analyzed? June 2000). <br /> m. Have any groundwater concentration X Increasing trend of chloride in <br /> limits been exceeded? If yes, identify well MW-2 (17.7 µg/1). pH in <br /> upgradient well MW-1 is slightly <br /> in comments. above the C.L. at 8.19 (field <br /> n. Is there a description and graphical monitored <br /> presentation of groundwater flow X <br /> direction and gradient? <br /> o. Monitoring Wells: Is there a <br /> description,method, and time X <br /> of water level measurement and <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 /> County did not complete the repairs as need to the top deck of the landfill. Their letter of 22 June indicates <br /> that repairs will be completed by the end of August 2000. <br /> Annual sampling in 1999 indicated the presence of hexavalent chromium in all wells,however the <br /> downgradient well, MW-4 had the highest concentration. Our letter of 25 May requested a retest of these <br /> wells with results reported to the Regional Board by 15 July. The county elected not to retest based on <br /> similar detects at North County and Foothill (their letter dated 22 June). <br /> Higher pH in upgradient well noted. <br /> No VOCs detected in any well. Chloride in monitoring well MW-2 still increasing trend (17.7 mg/1),though <br /> within drinking water standards. Groundwater flow direction has shifted from southerly to SSE, so MW-2 is <br /> side-gradient to downgradient. <br /> RWQCB Staff Signature: <br /> Date: 4 August 2000 <br />