Laserfiche WebLink
WASTE DISCHARGE REQUIREMENTS ORDER NO. -3- <br /> CALIFORNIA <br /> 3_CALIFORNIA NATURAL PRODUCTS <br /> WASTEWATER TREATMENT FACILITY <br /> SAN JOAQUIN COUNTY <br /> treatment systems proposed in the City of Lathrop. CNP has also considered using interim <br /> capacity available in the City of Manteca's expansion project. Wastewater generation at CNP is <br /> expected to increase in the future as presented in the table below. The data presented is the total <br /> anticipated flow rate and will be split between the land application area and municipal treatment <br /> system discharges. <br /> Year Projected Flow (end) Year Proiected Flow(gpd) <br /> 2000 250,000 2006 578,000 <br /> 2001 288,000 2007 665,000 <br /> 2002 331,000 2008 765,000 <br /> 2003 380,000 2009 879,000 <br /> 2004 437,000 2010 1,011,000 <br /> 2005 503,000 <br /> 17. The current average wastewater flow rate from the facility is 240,000 gpd; of this, 60,000 gpd <br /> discharged to the City of Lathrop wastewater system. Accounting for near-term growth of the <br /> CNP facility, the Discharger has proposed average annual and maximum monthly average <br /> wastewater generation rates of 310,000 and 350,000 gpd. Based on the anticipated discharge of at <br /> least 60,000 gpd of wastewater to the municipal system, the expected average and maximum <br /> volumes of wastewater applied to land will be 250,000 to 290,000 gpd. <br /> WASTEWATER SYSTEM <br /> 18. Process and cleanup wastewater is piped to a central collection sump where it is pumped to the <br /> treatment system. <br /> 19. Wastewater generated in the processing plant is characterized by a high organic matter and solids <br /> content. Effluent concentrations have declined substantially since the recent addition and <br /> optimization of additional wastewater pretreatment systems. The RWD reported the average <br /> concentrations of analytes in the process wastewater and treated wastewater are as follows: <br /> Constituent Units Untreated Wastewater t Treated Wastewater 2 <br /> Biochemical Oxygen Demand mg/1 2,205 165 <br /> Chemical Oxygen Demand mg/l 5,287 300 <br /> Electrical Conductivity µmhos/cm 1,550 1,800 <br /> Total Dissolved Solids mg/l 2,190 1,1453 <br /> Fixed TDS mg/1 1,279 9943 <br /> Total Nitrogen mg/l 49.3 17.4 <br /> pH Standard 8.6 7.7 <br /> 1 Untreated wastewater data from Wastewater Capacity Plan, 17 January 2000,prepared by B.Dickson. <br /> 2 Treated wastewater data from monthly average data,RWD Addendum,Table 6,Nov.2001. <br /> Data from the Discharger's response to the tentative WDRs,March 2001. <br /> 20. CNP's treatment of process wastewater consists of screening using a rotary screen and two <br /> 100-micron stainless steel parabolic screens; holding/recycle tank; pH control;Dissolved Air <br /> cwa..r.w..c�x..�awaxvwnimv..a.vma,m <br />