Document eYroOO2wL3kevBD6qDyQ5m9m

AR 2.6 _ 0779 EFFECT OF DEGRADATION ON FOAMING TEST SUBSTANCE____________________________________________ Identity: A mixture containing perfluorooctanesulfonate, which may also be referred to as PFOS, FC-95, or as a component of FC-206 or L3243. (1-Octanesulfonic acid) (CAS # 2795-39-3). Remarks: The 3M production lot number was not noted. The test sample is FC-206. Current information indicates it is a mixture of 0.67% PFOS, 17.5% diethylene glycol butyl ether, 78.91% water, 1.33% Sultone foamer, 1% sodium octyl sulfate, 0.04% sodium lauryl sulfate, 0.5% polyoxyethylene monooctylphenyl ether, and 0.05% benzotriazole. The following summary applies to a mixture with incompletely characterized concentrations of impurities. Data does not accurately reflect degradation potential of the fluorochemical component of the test sample. METHOD____________________________________________________ Method: Experiment in conjunction with Modified OECD Screening Test GLP: No Year Completed: 1980 Analytical monitoring: Foam height vs. time Statistical methods: Results were determined by calculation of the foam height after shaking. Test organism source: Not given. Test condition: Dilution water: Nutrient solution Reference and test solution preparation: OECD test culture collected from the end of the 28-day Modified OECD screening test. Samples diluted with nutrient solution to same concentrations as used in beginning of 28-day Modified OECD Screening test. Vials capped and shaken vigorously by hand for 30 seconds. Test vessels: #4 glass vials (4-1/2 in.). Number of concentrations: Sample from the 28-day biodegradation test, freshly prepared solutions of identical concentration, and blank. Temperature: Not given. Total suspended solids and pH on day of testing: Not given. Element Basis: Measured foam height RESULTS_________________________ ;__________________________ Nominal concentrations: Blank, freshly-prepared solution, solution from 28 day test. Test material concentration of each at 425 mg/L. 001449 Element values: Foam height (30 sec.) = 20 mm (fresh solution) Foam height (30 sec.) = 7 mm (solution from biodeg. test) Foam height (30 sec.) = 15 mm (blank) Remarks: Testing was conducted on the mixture as described in the Test Substance Remarks field. The values reported apply to that mixture and not the fluorochemical proportion alone. CONCLUSIONS_______________________________________________ Microbial metabolic activity reduces the ability of the test substance to foam. Submitter: 3M Company, Environmental Laboratory, P.O. Box 33331, St. Paul, Minnesota, 55133 DATA QUALITY_______________________________________________ Reliability: Klimisch ranking 3. Study lacks description and records of the method followed. The inoculum is not properly characterized. The sample purity was not properly characterized and the study lacks analytical confirmation of the amount of fluorochemical proportion in the solution. REFERENCES________________________________________________ The studies were conducted by the 3M Company, Environmental Laboratory, St. Paul, MN, Lab Request number 5541S, 1980. OTHER_________ :_____________________________________________ Last changed: 6/28/00 001450 Internal Correspondence cc: D. L. Bacon/R. L. Bohon - 21-2W (58) D. R. Ricker - 53-4N To: J. A. PIGNATO - COMMERCIAL CHEMICALS DIVISION - 236-2A From: E. A. REINER - ENVIRONMENTAL LABORATORY (EEfcPC) - 21-BW (63) Subject: EFFECT OF BIODEGRADATION ON FOAMING OF "LIGHT WATER" PRO Date: AUGUST 6, 1980 ' In conjunction with the OECD Modified Biodegradation Screening Test on FC-203, PC-206, and PC-3017, a side study was done that provided data on the effect of biodegradation on the foaming of "LIGHT WATER" products. After 28 days of incubation, 25 ml of each OECD test culture was poured into separate #4 (4 1/2") glass vials. The vials were capped, shaken vigorously by hand for 30 seconds, and the foam height measured. Table 1 compares the results of these 28 day old cultures with those of freshly prepared "LIGHT WATER" solutions of identical concentration. Also compared in this table are 28 day old "LIGHT WATER" solutions kept sterile with 400 mg/1 HgCl2* Table 1 - Foam Height After 30 Seconds of Vigorous Shaking 280 mg/1 FC-203 425 mg/1 FC-206 210 mg/1 FC-3017 Fresh Solution 15 mm 20 mm 12 mm After 28 Days Biodegradation 5 mm 7 mm 2 mm HgCl2 Stabilized For 28 Days 10 mm 15 mm 10 mm These results clearly demonstrate that microbial metabolic activity reduces the ability of "LIGHT WATER" products to foam. These data may prove useful in responding to future, customer inquires about the treatability of these products. Please call me on 778-5079 if you have any questions concerning this information. fa . EAR/cel 001451