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_3 <br /> EUYUND G. BHUw,.JR. <br /> aDvennOr, <br /> G A L t F O W p 1 A MATT HEV.'RODRIOUEZ <br /> ECCtICTA[ty rO1T <br /> WaterS RONMENTnL PHOTtCIIO <br /> Centra! Valley Regional Water Quality Control Board RECEIVED <br /> 15 May 2012 <br /> Linda Novick ENVIRONMENTAL HEALTH <br /> Harvest-Lathrop PERMIT/SERVICES <br /> 916 Frewert Road <br /> Lathrop, CA 95330 <br /> REVIEW OF REPORT OF WASTE DISCHARGE, HARVEST-LATHROP COMPOSTING FACILITY, <br /> SAN JOAQUIN COUNTY <br /> Central Valley Water Board staff has reviewed the additional information submitted pursuant to our <br /> 19 April 2012 letter for the Report of Waste Discharge for the Harvest-Lathrop composting facility in <br /> San Joaquin County. As requested, the additional information includes groundwater data, runoff pond <br /> data, and a discussion of the data. The additional information also includes an updated application <br /> form with a new facility owner/operator and a new facility name which is now "Harvest-Lathrop", <br /> formerly "Tulare County Compost and Biomass, Inc. (Valley Organics)", and also includes an updated <br /> site map. <br /> The requested water quality data is presented in a 1 May 2012 report by.John Minney, PE. <br /> Groundwater quality data from three geoprobe borings that were advanced in 2008 prior to onsite <br /> composting operations is included. Groundwater samples from the two borings closest to the site <br /> (GP-1 and GP-2) indicate very poor groundwater quality with total dissolved solids (TDS) <br /> concentrations of 5,380 milligrams per liter(mg/L) and 8,170 mg/L, respectively. The results for other <br /> constituents also indicate very poor groundwater quality. The third boring (GP-3) indicates much <br /> better water quality; however, the GP-2 sample location is on the same side of and is much closure to <br /> the site than the GP-3 boring indicating that water quality in at the GP-2 location is more <br /> representative of what is beneath the composting and runoff basin area. <br /> The report also includes the sampling results from the runoff(leachate) pond that is required by <br /> Monitoring and Reporting Program (MRP) No. R5-2008-0811. The data from the pond shows TDS <br /> concentrations ranging from 440 mg/L to 1,600 mg/L with an average of 1,013 mg/L. This indicates <br /> that the water in the runoff pond is of much better quality than that of the underlying groundwater. <br /> Other constituents in the pond are similarly of lower concentration than underlying groundwater. It is <br /> also reported that the pond is usually dry. The current composting operations at the site would <br /> therefore not be expected to cause the quality of underlying groundwater to worsen as compared to <br /> conditions that were present prior to composting operations. <br /> It is stated in the Report of Site Composting Information we received in April 2012 that the facility <br /> proposes to begin accepting and composting curbside collected green waste that may or may not be <br /> commingled with food scraps. While the addition of food scraps to the feedstock may cause the <br /> leachate and pond water quality to worsen, we would not expect it to be worse that the existing <br /> underlying groundwater quality. The facility is however required to continue to monitor and report in <br /> accordance with the MRP No. R5-2008-0811 to ensure that water quality in the pond remains of <br /> better quality than the underlying groundwater. <br /> KAR'_ E. LONGLEY SCD, P.E., CHAIP i PAMELA C. CREEDON P.E.. BCEE, EXECUTIVE OFFICER <br /> 11020 Sur Center Drive H200,RancndCordova,CA 95670 www.watbrboirds.ca.gov/contralvaLey <br /> ��rc cvo ecu rA _, <br />