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Hi Rita, Thank you very much for your detailed response. It is helpful and I appreciate it greatly. All the best, Mona _ We are responding to your email of July 11, 2015 to Miguel Del Toral. He is out of the office today, but has _ provided the following information to your lead questions. Overall, he agrees with Marc’s responses on the | water filter. Filters that are certified to remove lead are typically designed to remove 99 percent of the | lead. They are also designed with additional capacity as a safety measure, but you should still change the filter in accordance with the manufacturer’s instructions. If you identify elevated lead levels from other taps that do - not have water filters, we suggest either adding a filter to those, such as the bathroom tap, or only using the | filtered tap water for consumption. xxxEND_PAGE:deq21_b081_0253_0257_1 _ If you are still interested in having your water tested you should use a laboratory that has been certified by the | State for drinking water E enailyaes (a list i is swuilable from the anne link: : i é OG html. Please note that a first-draw - sample, emer of pre- flushing, is best for identifying lead that comes from the faucet and other in-home ' piping or fittings close to the faucet. First-draw sampling does not give a good indication of the lead - contribution from sources further from the faucet (i.e. lead service line, leaded brass meter, etc.). Information | for residents about first-draw samuling bi instructions can be found on the last page of ‘he 2006 memo on aerators | aerators 10202006. pdf In addition, bela are two Panne — our Region 5 “meat ort information - about how to identify if you have a lead service line coming into your home and for faucets that do not have | filters on them, how to clean the aerators. - Regarding your TTHM question, EPA has considered developmental and reproductive risks from multiple _ intake routes of exposure (e.g., ingestion, inhalation, and dermal) in our 2006 Disinfectants and Disinfection ' Byproducts (DBPR) rule. Some studies did suggest associations between TTHM exposure and various adverse - reproductive and development health effects. However, studies available overall showed inconsistent _ results. As such, our Agency could not conclude whether exposure to TTHMs could cause adverse _ health effects. However, we did note in our findings that there was the potential | for concern. - Currently, we are in the process of re-evaluating our DBPR rules and considering new toxicological data _ regarding reproductive and developmental health effects. Until our evaluation is complete, pregnant women - can elect to take additional precautionary measures such as taking shorter showers, venting the room while | showering/bathing, and not ingesting water with high TTHM concentrations. | We hope this information is helpful to you. Rita D. Bair : Section 2 Chief : Ground Water and Drinking Water Branch USEPA-Region 5 : phone: | fax: 312-692-2132 xxxEND_PAGE:deq21_b081_0253_0257_2 Lead service lines are generally a dull gray color and are very soft. You can identify them easily ay carefully scratching weak a hey, lf the pipe is rnade af lead, the area you've scratched will ture = beragit sibeer color. Da nat use a knife or other sharp instrument and take care not to puncture a hole in the pine. Ea Bees Le Lead sereire lines can be connected te the residential plumbing usag solder and have a characteristic solder “bulb” at the end, a compression fitting, ar other conmecter made of galvanized iron or brass/ bronze. MBter, YOu water wet? may be in your hame a Lead service lines often end dust inside the frant or side wall of the home, bur may extend further into the “meter pit” or “meter «i @s shwwn above. building as shown, where the Jead service line comes gut af the basement flanr te the water meter and then back into the floor, continuing Farther mto the building. i Sica ema ea : Ee EU eee eee ee Ee _-=Ssiésizs_i_C = eee i: __sazéwétié#iz. iMany taps have an aereter as part of the faucet assembly. Aerator screens are not intended to remove contaminants in: water, but may trap sediment or debris as water passes through the faucet. Lead-bearing sediment may end up in drin water from physical corresiom of leaded solder and can build up in the aerator over time. t. Remove the aerator by peisting off with hands or pliers. 2. Qae oy more parts are contained within the aerator. Mate the arder anc orientation of the parts as you remave them. 3. Rinse the pieces with weter and Orush aff the 4, Reassemble the ser screw it back onte the and hancd-tighten. if ar debris, For deposits that ace difficult ta remove, soak the parts in water for a few sinutes and scrub with a toothbrush, Backwashing parts are cracked or broken, repiace them. washer has hardened should be replaced. Berator campanents is also en effective cdeaning method for many aerator types. Hold the removed aerator uoside down under flowing water ta bechwash screens and mesh filters. xxxEND_PAGE:deq21_b081_0253_0257_3 _ From: Mona Munroe-Younis [mailto: _ Sent: Saturday, July 11, 2015 5:57 P ai