Document mm6867L3kMz8wnG8Gxj7rQonQ

UHM diM E OWUMDMl E. I. d u P o n t d ewcNowwemmToOu r s 51 C o m p a n y P. O. Box 6090 NEWARK, DE 19714-6090 engineering department November 26,1991 AR226-2736 CC: A. H. Pagano-Chem-Chambers Works H. W . Heath Jr.-Chem-Chambers Works S.W .C . Constable-Engr-L33E34 R. A. Reich-Engr-L3356 F. SEPULVEDA - DU PO NT POLYM ERS - D -12032-1 R. J. ZIPFEL - DU PONT POLYMERS - W ASHINGTON WORKS EVALUATION OF SURFACTANT 0 8 RELATIVE T O CHAMBERS W ORKS SUMMARY: Washington Works is currently discharging the surfactant 0 8 , (Ammonium Perflurooctonate) in a wastewater generated from one of its processes, to the Ohio River. Washington Works would like to decrease the amount of 0 8 being discharged into the Ohio River. An alternative method of disposal would be to send additional wastewater containing 0 8 to Chambers Works for treatment. Currently Washington Works is sending 12,000 Ibs./year of 0 8 mixed with wastewater by rail cars to Chambers Works and would like to increase it to 24,000 ibsVyear. The surfactant 0 8 is not degradable by biological systems. Thus Washington Works has requested Engineering to determ ine the fate of 0 8 in the Chambers Works wastewater treatment system and the Delaw are River at the proposed loading of 24,000 lbs./year. It appears that the increase of 0 8 to 24,000 Ibs/year to Chambers W orks will not affect their NPDES perm it Also the point at which Chambers Works discharges into the Delaware River"is brackish w ater thus not suitable for drinking water. Specific comments, conclusions, and recommendations are presented below: o Currently no data exists on w hether C -8 will bioaccumalate in fish tissue. However, an estimation of the octanol-water partition coefficient predicted that C -8 will not accumulate to large concentrations in the fatty tissues of organisms. o Washington Works would like to concentrate the wastewater going to Chambers Works to reduce the amount of wastewater that needs to be sent. Therefore an evaluation of the Chambers Works ability to handle the increased concentration of pollutants form Washington W orks should be completed. An E/BQ D Test to determ ine if the increased concentrations will effect the PACT system should be done by Chambers Works (Stan Tem ple), Engineering, thru the Engineering Test Center or Washington Works. Company Sanitized. Does not contain TSCA CB1 The percent removals ot 0 8 across the PACT system should be determined. Currently a bench scale lest is planned by Washington Works with Chambers Works activated carbon to determine the amount of removal of 0 8 by the PACT system . ft is recommended that Chambers Works equalize the. Washingloni Works wastewater as much as possible to reduce concentrations within the PACT system and the discharge outfall, if this is not already being done. D IS C U S S IO N : In review of the proposal to increase the amount of the surfactant 0 8 to be treated at Chambers Works from 12,000 Ibs/year to 24,000 Ibs/year theJ j !l wl evaluated to determine the fate and impact of 0 8 within the Chambers Works W W TP and the Delaware River: ' o Chambers Works NPDES permit o Concentrations of 0 8 at outfall 661, outfall 001, edge of the zone of initial dilution, and the edge of the mixing zone. o The disposal of the activated carbon in relation to 0 8 Attachment 1 outlines some human health and aquatic toxicity information on 0 8 relative to Chambers Works NPDES permit. In relation to aquatic toxicity testing and the Ames te s t, this information shows that the surfactant 0 8 will not negatively impact the perm it The Chambers permit does have a testing requirement for surfactants- however, it is only a monitor and report requirement. The Delaware River at the point which Chambers Works discharges is brackish, thus drinking waters concerns are not present. The concentrations of 0 8 were calculated at the following points; outfall 661, outfall 001, edge of the zone of initial dilution, and the edge of the ml*'ng zone (Figure 1) Table 1 shows the current and proposed loading concentrations at the Points identified above. Note, these concentrations were based on the assumption that no treatm ent occurs in the Chambers Works PACT system. If the surfactant C -8 is attach!ng/coating to the activated carbon, the O B would be removed with the carbon once wasted. Chambers Works is currently disposing of waste PACT carbon to an onsite landfill. However, in Decem ber 1991 Chambers W oiks plans to regenerate the wasted carbon to reuse within the PACT system. The carton regeneration system is a multiple hearth furnace with counter current flow. Rrst the w ater in the ir b o n fines will evaporated at 212 F{100 C ). then the poralys.s of the carbon fines will occur ot 1000 F(573 C) and lastly tt e PACT carbon will be regenerated. The surfactant C -8 volatilizes at 392 F(200 C ) and decomposes at 762 F 'Company Sanitized. Does noi confalnTSCA CB1 (400 C) to C 0 2 and HF. Therefore any C -8 removed by the PACT carbon will be destroyed during the regeneration process. An evaluation was performed by Tony Rogers of Michigan Technological University on C -8 to estimate the octanol-water partition coefficient (kow) to predict the ability of C -8 to accumulate In the fatty tissue of organisms. His evaluation is in attachment 2. Based on his evaluation it was predicted that very little of the target chemical will partition into a lipid phase and therefore will not accumulate to large concentrations on the fatty tissues of organisms. DU P O N T ENGINEERING W ater Quality Group *3"" B J. B. Ruiter Consulting Engineer JBR/kcl Company Sanitized. Does no! contain TSCA CBl CONCENTRATIONS or C-i AT DirrEREHT LOCATIONS AT C H A H B M S W K K S (mg/l) 1K9 HHK U ko OM fot* o5 MH B9 O<4 4M 0 o T** nl o m r* n oe Q Mm o o oo S IH I 5 3J SO * tfaJ3<. C m mmo *o>< I ** &aH o'mll fenO5*U* \ mIUCb HnNmAmtmuct 44obJ Ii >e u Tt*f47Jl*tB*U* * H ^3 t l l \ O ^U Ti^9n S*U4OAm93 4tS3 O 9>Q 49bJ Be *u Vmn9 4aeIl Company Sanitized. Does not contain TSCA CBt IS 'Company Sanitized. Does not contain TSCA CBl