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INFORMATION SHEET FOR ORDER NO. -4- LINNE ESTATES,LLC LINNE ESTATES WASTEWATER TREATMENT SYSTEM SAN JOAQUIN COUNTY Constituent Units Value Beneficial Criteria or Justification Use PH pH Units 6.5 to MUN Secondary MCL io 8.5 6.5 to AGR Protect sensitive crops 4 8.4 1 Municipal and domestic supply 2 J.E. Amoore and E. Hautala, Odor as an Aid to Chemical Safety: Odor Thresholds Compared with Threshold Limit Values and Volatilities for 214 Industrial Chemicals in Air and Water Dilution,Journal of Applied Toxicology, Vol. 3,No. 6 (1983). 3 Agricultural supply 4 Ayers,R. S. and D.W. Westcot, Water Quality for Agriculture,Food and Agriculture Organization of the United Nations—Irrigation and Drainage Paper No. 29,Rev. 1,Rome (19 85) 5 Title 22, California Code of Regulations(CCR), Section 64449,Table 64449-B 6 Title 22, CCR, Section 64449,Table 64449-A 7 Title 22, CCR, Section 64431, Table 64431-A 8 Title 22, CCR, Section 64439 9 Title 22, CCR, Section 64439 10 Title 40, Code of Federal Regulations, Section 143.3 11 California Department of Health Services,Division of Drinking Water and Environmental Management, Drinking Water Action Levels,http://www.dhs.cahwnet.gov/ps/ddwem. Municipal wastewater contains numerous dissolved inorganic waste constituents (i.e., salts, minerals) that together comprise Total Dissolved Solids (TDS). Each component constituent is not individually critical to beneficial use protection unless they are individually listed. The cumulative impact from these other constituents, along with the cumulative affect of the constituents that are individually listed can be effectively controlled using TDS as a generic indicator parameter. Not all TDS constituents pass through the treatment process and soil profile in the same manner or rate. Chloride tends to pass through both rapidly to groundwater. Groundwater chloride concentrations in the region normally are much lower than in treated municipal wastewater; therefore, chloride is a useful indicator parameter for evaluating the extent to which effluent reaches groundwater. However,the limited data collected to date indicates chlorine exists at higher concentration than that expected in the discharge. Boron is another TDS constituent that may occur in wastewater in concentrations greater than natural background groundwater depending on the source water and to the extent residents use cleaning products containing boron. Other indicator constituents for monitoring potential groundwater degradation due to wastewater discharge includes total coliform bacteria, ammonia, total nitrogen, and Trihalomethanes (THMs) (by-products of chlorination). Since the WWTF uses ozone to disinfect the effluent, THMs are not included in the monitoring program or interim groundwater limitations. A backup chlorine system does exist and if chlorine is regularly used, the MRP will be modified to include THMs in effluent and groundwater monitoring. Dissolved iron and manganese are useful indicators to determine whether components of the WWTF with high-strength waste constituents are ineffective in containing waste. Exceptionally high TDS and nitrogen also typifies this type of release. This Order assigns numeric groundwater limitations only for constituents anticipated to be present in the wastewater, known potential breakdown products of domestic wastewater, or known to potentially leach from soil as a result of domestic wastewater discharge to land.