Laserfiche WebLink
6. Request 3 <br /> "Tile work plan provides one sample result from one swimming pool in 1987 to suggest that <br /> there is a significant contribution of chloroform froth swimming pools to the aquifer in the area <br /> downgradient of MW-7. More data is necessary to support this conclusion." <br /> 7. Response 3 <br /> _ Neither local or state environmental health and water agencies were able to provide any <br /> meaningful information. A private research firm for an association of manufacturers of <br /> swimming pool and spa chemicals in southern California has a large data base, but considers it <br /> proprietary information. <br /> An extensive literature search was made for technical data that would show chloroform levels <br /> in pool water. One study is summarized here and enclosed as Appendix A of this addendum. <br /> Researchers at the University of Modena, Modena, Italy, studied Chloroform in Alveolar Air of <br /> Individuals Attending Indoor Swimming Pools. The study used eight sampling sessions at two <br /> �. indoor swimming pools during a period of twelve months. The chloroform concentrations (mean <br /> of three samples) ranged from 159 nmol/L to 787 nmol/L (19 ppb to 94 ppb). <br /> In 1994 the Department of Health Services, County of Los Angeles, completed an internal <br /> special report on the Use of Swinuning Pools For Emergency Drinking Water. The study was <br /> based on 50 pools that were reasonably well maintained to which had been added the maximal <br /> amount of chemical which might be reasonably used in the course of competent maintenance of <br /> the pools. A subset of ten (10) samples were analyzed from trihalomethane concentrations. <br /> Results of this analysis are shown in 'fable 3. Excerpts of the report are enclosed in Appendix <br /> Q of this addendum. <br /> Table 3 <br /> Trihalomethane Concentrations - Swimming Pool Water (10 pools) <br /> Public llealth Programs and Services <br /> Department of health Services - County of Los Angeles(" <br /> Analyte (ppb) Average Maximum 95th <br /> n = 10 Percentile <br /> _ Chloroform 51.0 130.0 116.5 <br /> Bromodichloromethane 4.6 15.0 12.5 <br /> _ Dibromochloromethane 1.6 6.8 5.6 <br /> (1) Draft report: Use of Swinuning Pools for Emergency Drinking Water. R. Kebabjian, MPH, EHS., P.J. <br /> Papanek, Jr., MD, MPH. Febwary 7, 1994. Received by personal communication. <br /> Aswisment of Contamination <br /> Addendum to Revised Work Plan <br /> Triple E Produce Corp..Tracy <br /> 3 <br /> �� CONDOR <br />