Document v6Eb71rznZqVNXoGOb93r38xw

EFFECT OF DEGRADATION TEST SUBSTANCE ON FOAMING Identity:A mixturecontainingperfluorooctanesulfonatweh,ich may alsobe referredtoas PFOS, FC-95, or as a component of FC-206 or L3243. (1-Octanesulfoniacid)(CAS # 2795-39-3). Remarks: The 3M productionlotnumber was notnoted. The testsample isFC-206. Currentinformationindicatesitisa mixtureof 0.67% PFOS, 17.5% diethyleneglycolbutylether,78.91% water,1.33% Sultonefoamer, 1% sodium octylsulfate0,.04% sodium laurylsulfate0,.5% polyoxyethylene monooctylphenylether,and 0.05% benzotriazole. The followingsummary applies toa mixture with incompletely characterizedconcentrations of impurities.Data does not accurately reflectdegradation potentialof the fluorochemical component of the testsample. METHOD Method: Experiment inconjunctionwithModifiedOECD Screening Test GLP: No Year Completed: 1980 Analyticalmonitoring: Foam heightvs.time Statisticamlethods: Resultswere detprminedby calculatioonfthefoam heightaftershaking. Test organism source: Not given. Test condition: Dilutionwater: Nutrientsolution Reference and testsolutionpreparation: OECD testculture collectedfrom the end ofthe 28-day ModifiedOECD screeningtest. Samples dilutedwithnutrienstolutiontosame concentrationsas used inbeginningof 28-day ModifiedOECD Screeningtest.Vialscapped and shaken vigorouslyby hand for30 seconds. Test vessels: #4 glassvials(4-1/2in.). Number of concentrations: Sample from the28-day biodegradation test,freshlyprepared solutionsofidenticacloncentrationa,nd blank. Temperature: Not given. Total suspended solidsand pH on day of testing: Not given. Element Basis: Measured foam height RESULTS Nominal concentrations: Blank,freshiy-prpeared solutions,olutionfrom 28 day test.Test materialconcentratioonf each at425 mg/L. Elementvalues: Foam heigh(t30sec.)= 20 mm (fressholution) Foam height(30sec.)= 7 mm (solutiofnrom biodeg.test) Foam height(30sec.)= 15 mm (blank) Remarks: Testingwas conductedon themixtureas describedintheTest Substance Remarks field.The valuesreportedapplytothatmixtureand not the fiuorochemicalproportionalone. CONCLUSIONS Microbialmetabolicactivitryeduces theabilitoyfthe testsubstance to foam. Submifter: 3M Company, EnvironmentalLaboratory,P.O. Box 33331, St. Paul,Minnesota, 55133 DATA QUALITY ReliabilitKyl:imischranking3. Study lacksdescriptioannd recordsofthe method followed.The inoculumisnot propedy characterized.The sample puritywas notproperlycharacterizedand thestudy lacksanalytical confirmationofthe amount offluorochemicalproportioninthe solution. REFERENCES The studieswere conducted by the 3M Company, EnvironmentalLaboratory, St.Paul,MN, Lab Request number 5541 S, 1980. OTHER Last changed: 6/28/00 interrCmolrrespor4ence cc: D. L. Bacon/R. L. Bohon - 21-2W (58) D. R. Ricker 53-4N To@ J. A. PIGNATO COMMERCIAL CHEMICALS DIVISION - 236-2A Fromi E. A. REINER ENVIRONMENTAL LABORATORY (EE&PC) - 21-BW (63) Subject: EFFECT Date: AUGUST OF BIODEGRADATION 6, 1980 ON FOAMING OF "LIGHT WATER" PRO 3m 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 meaaured. Table 1 compares the results of these 28 day old cultures with those of freshly prepared OLIGHT WATER" solutions of identical concentration. Also compared in this table are 28 day old OLIGHT WATER" solutions kept sterile with 400 mg/l HgC12- Table I - Foam Height After 30 Seconds of Vigorous Shaking Fresh Solution After 28 Days Biodegradation 280 mg/l FC-203 15 mm 5 mm 425 mg/l FC-206 20 mm 7 mm 210 mg/l FC-3017 12 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 WATERO 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 thisN information. EAR/cel