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21 <br /> More intensive treatment(TS-1 or TS-11)is required for package treatment systems than for <br /> basic onsite systems (DSE). <br /> • Package systems discharge to ditch/stream, so the water does not go through the <br /> soil for extra cleaning, but the higher effluent standards more than make up for that <br /> • Advanced pre-treatment can filter out heavy metals (usually with a fabric or heavy <br /> textile material that can be removed for cleaning and disposal) <br /> • Advanced pre-treatment generally does not address PFAS <br /> • Package treatment systems don't necessarily produce drinking-quality water, but it <br /> gets close to those standards <br /> • Package plants are highly regulated and monitoring is required <br /> Why use advanced pre-treatment? <br /> • Overcome a limiting site condition <br /> • Increase system capacity <br /> System Costs <br /> • Community systems tend to be more expensive on a per-lot basis, but there are cost <br /> savings compared to advanced pre-treatment for individual systems <br /> • The table below shows a per-lot basis; compact locations drive per-lot costs down <br /> (due to the amount of infrastructure required to transfer the water to the common <br /> Location) <br /> • The table below <br /> shows a range of Comparison of Treatment Methods <br /> estimates for <br /> Basic Septic Tank Soil <br /> wastewater systems onsite Prima Dispersal Dis rsalinto Final <br /> Treatment Soil Treatment <br /> in Orange County, System DSE DSE <br /> based on the Advanced Septic Tank Soil <br /> industry contacts of on5lte Primary ji, P Advanced Pre- Dispersal into Final <br /> Treatment Treatment Soil 0 Treatment <br /> Mr.Tony Whittaker System DSE TS-1orTS-II TS-1orTS-II <br /> (presenter) Package Septic Tank <br /> Treatment Primary Advanced Pre- * Discharge to <br /> System Treatmerrt Treatment Ditch/Stream <br /> DSE TS-1 or TS-11 <br />