Document 6bqdzOEpkXyqy1p2qJEmy9nBg

M <6 - 0 7 5 8 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-203A or FC203 NFP. (1-Octanesulfonic acid) (CAS # 2795-39-3). Rem arks: The 3M production lot number was not noted. The test sample is FC-203A. Current information indicates it is a mixture of 1.34% test substance, 25% diethylene glycol butyl ether, 67.85% water, 2.66% Sultone foamer, 3% sodium octyl sulfate, 0.1% sodium lauryl sulfate, and 0.05% tolyltriazole. The following summary applies to a mixture with incompletely characterized concentrations o f impurities. Data may not accurately reflect the effects o f the fluorochemical component o f the test sample on foaming. METHOD_____________________________________ ___________________ M ethod: Experiment in conjunction with Modified OECD Screening Test, OECD 301E GLP: No Y ear Com pleted: 1980 A nalytical m onitoring: Foam height vs. time S tatistical m ethods: Results were determined by calculation of the foam height after shaking. T est organism source: A 50:50 mix of soil extract and secondary effluent was used in the biodegradation test. The secondary effluent was Pigs Eye mixed liquor, while the soil was from E.A. Reiner's garden. T est condition: Dilution w ater: Nutrient solution Reference and te s t 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.). Num ber o f concentrations: Sample from the 28-day biodegradation test, freshly prepared solutions of identical concentration, and blank. Tem perature: Not given. Total suspended solids and pH on day o f testing: Not given. Elem ent Basis: Measured foam height RESULTS________________________________________________________ 000966 Nom inal concentrations: Blank, freshly-prepared solution, solution from 28 day test. Test material concentration of each at ~ 280 mg/L. Elem ent values: Foam height (30 sec.) = 15 mm (fresh solution) Foam height (30 sec.) = 5 mm (solution from biodeg. test) Foam height (30 sec.) = 10 mm (blank) Rem arks: 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. C O N C L U S IO N S ___________________________________________________ Microbial metabolic activity reduces the ability of the test substance to foam. S ubm itter: 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 sample purity was not properly characterized and the study lacks analytical confirmation of the amount of fluorochemical proportion in the solution. R E F E R E N C E S ____________________________________________________ The studies were conducted by the 3M Company, Environmental Laboratory, St. Paul, MN, Lab Request number 5541S, 1980. OTHER__________;________ ________________________________________ Last changed: 6/28/00 0 0 0 9 6 *7 Internal Correspondence cc: D. L. Bacon/R. L. Bohon - 21-2W (58) D. R. Ricker - 53-4N To J. A. PIGNATO - COMMERCIAL CHEMICALS D IV IS IO N - 236-2A From: E . A . REINER - ENVIRONMENTAL LABORATORY (EE&PC) - 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 'fre-^203, FC-206, and FC-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/T 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. EAR/cel 000968 i rONM 1 -TWO SAMPLE DESCRIPTION BEST COPY AVAILABLE (-H T em-, P . no / * $ / ENVIRONMENTAL ENQR. LAB - WORK SHEET Date: Analyst: J . *? 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