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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 <br /> (Sept 93/Aug 97) Monitoring Parameter,and COCs <br /> (if required) samples and analyzed? <br /> in. Have any groundwater concentration x Low levels of PCE MW-14,-16, <br /> limits been exceeded? If yes, identify &-21. One or more inorganics <br /> 9 wells,including: Ba, Ca,Cl, <br /> in comments. <br /> Mg, Sr,Na, SO4,Bicarbonate& <br /> TDS. Cr6 and/or As detected in <br /> n. Is there a description and graphical 12 wells. <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 <br /> of the purging method,purge <br /> pump and its placement, and <br /> field parameters? <br /> Additional Comments and Recommendations: <br /> This site has a history, since 1988, of intermittent, low level, VOC and inorganic concentrations greater than <br /> background. The facility remains in corrective action proof monitoring from corrective actions implemented <br /> in 1995. The frequency and magnitude of organic and inorganic concentrations is decreasing over time. The <br /> VOC concentrations may represent contamination of groundwater by escaping landfill gas. <br /> The presence of hexavalent chromium and arsenic in several wells has been confirmed by re-sampling. <br /> RWQCB Staff Signature: <br /> Date: <br />