### Tax, Wienke From: Flagg, MichaelA 

### Sent: Tuesday, February 11,20145:14 PM To: Ungvarsky, John Cc: Tax, Wienke; Kurpius, Meredith Subject: RE: monitoring data request Attachments: SouthCoast_Ozone_Workbook_2008-201 3.xlsx; SouthCoast_TribalMonitors_Quicklook_ 1hour_Ozone_2008-201 3.pdf; SouthCoast_TribalMonitors_DesignValue_1997Ozone_ 2008-201 3.pdf; SouthCoast_DesignValue_1 997Ozone_2008-2013.pdf; SouthCoastQuicklooklhour Ozone_2008-201 3.pdf; monitoring data requestfor South Coast ozone_mf_2014 02_il .docx

John and Wienke, Attached are a completed data requestform, an excel spreadsheetwith the calculated DVs in summarytables, and the correspondingAQS reports that are the basis forthe information inthe excel spreadsheet. There are three sheets in the excel filethatcoverthe data request. (1) 1997 8-hour DVTable (2) 1-hourAve.Exp.Exceed. Table (3) 1-hour Exceed. CountTable As you will notice the Design Value sitefor2011-2013 forboth 1997 8-hourand 1-hourhas shifted from Crestlineto the Redlands site... which is interesting. Also, as you might expect most 2011-2013 DVs are incomplete, as final data forthe 4th quarter does not haveto be submitted until April 1, 2014. Afinal note, i 

### onlycalculatedthe 1-hour average excpected exceedance design valueforperiods when ALLthreeyears ofdata were present. Partial averages of 1 or2 years ofdata were not included and denoted with a IT11 

### in the correspondingsummarytable. These can be calculated, butwill take moretime, as i would haveto digthrough old guidanceto see howthis is determined. Eitherway, this does not affectthe most recentyearDV5. Please let me know ifyou have any questions or need additional information.

From: Flagg, MichaelA Sent: Friday, February 07, 2014 9:52 AM To: Ungvarsky, John Cc: Tax, Wienke; Kurpius, Meredith Subject: RE: monitoring data request Thanks John, this is very helpful. I should be ab.leto getyou something by early nextweek.

1From: Ungvarsky, John Sent: Friday, February 07, 2014 9:03 AM

To: Flagg, MichaelA Cc: Tax, Wienke; Kurpius, Meredith Subject: RE: monitoring data request Excellent. Wienke and I have parallel actions underway that may be signed on the same date or in close proximity to each other. I am working on South Coast VMT offset demonstrations for 1-hr and 8-hr (1997) ozone standards, and Wienke is working on the South Coast attainment plan for 1-hr ozone. See attached for relevant language in my draft NPR. In the current draft, I’m assuming Crestline is the high monitor for both 1-hr and 8-hr (1997). My action is on a narrowly defined issue (i.e., VMT offset demo), but I want to mention the current AQ situation in the background. Wienke’s needs are likely greater because she is acting on a plan. (She can elaborate.)I hope this helps. Let us know if you have any questions Thanks John Ungvarsky Environmental Scientist USE PA, Region 9

Air Division, Planning Office 415-972-3963 (office) 510-667-9743 (alternate work location) From: Flagg, MichaelA Sent: Thursday, February 06, 2014 4:32 PM

To: Ungvarsky, John Cc: Tax, Wienke; Kurpius, Meredith Subject: RE: monitoring data request I should be able to start on this tomorrow and have something next week. What actions are the data for? Michael Flagg EPA Region 9

Air Quality Analysis Office

P: 415.972.3372 E: Flagg.MichaelA@epa.gov<mailto:Flagg.MichaelA@epa.gov> From: Ungvarsky, John Sent: Thursday, February 06, 2014 4:29 PM

To: Flagg, MichaelA Cc: Tax, Wienke; Kurpius, Meredith Subject: RE: monitoring data request Hi Michael— 2Just wanted to check in aboutthe data request sent in Dec. I knowyou are typically swamped, but will you be able to get to this in the nearfuture? I’ll need to circulatethe draft NPR bythe end ofFeb (but soonerwould be better). Thanks John Ungvarsky Environmental Scientist USEPA, Region 9 Air Division, Planning Office 415-972-3963 (office) 510-667-9743 (alternate work location) From: Kurpius, Meredith Sent: Thursday, December 19, 2013 11:21 AM To: Ungvarsky, John Cc: Tax, Wienke; Flagg, MichaelA Subject: FW: monitoring data request John!Wienke, Michael is the ozone and SC monitoring lead so please workwith him (he is cc’d). -Meredith From: Ungvarsky, John Sent: Wednesday, December 18, 2013 4:51 PM To: Kurpius, Meredith Cc: Tax, Wienke Subject: monitoring data request Hi Meredith

— In Mar-Apr 2014, Wienke and I will have rulemaking actions on South Coast ozone. These will require some data pulls. Please see the attached request. There isn’t a big rush, but hopefullyyou can assign someone to completethis by early February. Thanks. Have a happy and healthy holiday season and new year. John Ungvarsky Environmental Scientist USEPA, Region 9 Air Division, Planning Office 415-972-3963 (office) 510-667-9743 (alternate work location)

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