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LAWRENCE <br /> & ASSOCIATES <br /> ENGINEERS & GEOLOGISTS <br /> 10107.10 <br /> Task 2 <br /> July 23, 2018 <br /> Mr. Brendan Kenny <br /> California Regional Water Quality Control Board <br /> Central Valley Region <br /> 11020 Sun Center Drive#200 <br /> Rancho Cordova, CA 95670-6114 <br /> Dear Mr. Kenny: <br /> SUBJECT: TRANSMITTAL LETTER FOR 2ND-QUARTER 2018 GROUNDWATER- <br /> MONITORING REPORT FOR DIAMOND PET FOOD PROCESSORS OF <br /> RIPON,LLC AND ALTAGAS RIPON ENERGY INC.,RIPON, <br /> CALIFORNIA <br /> INTRODUCTION <br /> Please find attached a copy of Lawrence&Associates' (L&A's)2nd-Quarter 2018 Groundwater- <br /> Monitoring Report dated July 23, 2018, for Diamond Pet Food Processors of Ripon, LLC (DP) and <br /> A1taGas Ripon Energy Inc. (Ripon Energy), 942 and 944 South Stockton Avenue,Ripon, <br /> California. <br /> The work described in this report fulfills the monitoring and reporting requirements set forth in <br /> Waste Discharge Requirements (WDR), Order R5-2012-0105, dated 4 October 2012,issued to DP <br /> and Ripon Energy by the California Regional Water Quality Control Board,Central Valley Region <br /> (CVRWQCB). <br /> Certification Statements signed by DP and Ripon Energy representatives are presented on page 2. <br /> ESSENTIAL POINT(S)OF REPORT <br /> Groundwater chemistry in the semiperched aquifer is similar to previous monitoring events with <br /> groundwater quality either stable or improving under most of the site. <br /> The disposal of treated and diluted DP and Ripon Energy process water should not further degrade <br /> shallow groundwater quality as long as it is in compliance with the limitations established in WDR <br /> Order No R5-2012-0105. <br /> VIOLATIONS SINCE LAST REPORT <br /> No groundwater monitoring or reporting violations occurred at the DP and Ripon Energy site <br /> during the second quarter of 2018. <br /> CORRECTIVE ACTION IMPLEMENTATION SCHEDULE <br /> Because the current levels of total dissolved solids(TDS)and nutrients in the DP and Ripon <br /> Energy effluent are below the limits set forth in WDR Order No. R5-2012-0105 for salinity and <br /> nutrients(TDS and total nitrogen), a formal nutrient or salinity pollution prevention plan has not <br /> been required. DP and Ripon Energy,however, continue to investigate options to reduce both <br /> salinity and nutrients in their effluent. <br /> 3590 Iron Court • Shasta Lake,California 96019 • (530)275-4800 • fax(530)275-7970 • www.lwrnc.com <br />