Marty - First of two. Please include the emails belo w and the 2 attachments in the e-docket for the Coso

Junction redesignaton action (-0336). Thanks.

----- Forwarded by Doris Lo/R9/USEPA/US on 07/29/2010 11:39 AM -----

From: "Ted Schade" <tschade@gbuapcd.org>

To: Doris Lo/R9/USEPA/US@EPA

Cc: "'Lanane, Chris'" <clanane@gbuapcd.org>, "'Daniel Johnson'" <danj@gbuapcd.org>, <duaneono@yahoo.com>, Jan

Taradash/R9/USEPA/US@EPA, Kerry Drake/R9/USEPA/US@ EPA, Meredith Kurpius/R9/USEPA/US@EPA, <cellis @

Date: 07/28/2010 11:58 AM

Subject: RE: Valid data the the Coso Junction PM-10 monitoring site

Doris,

Good news on the Coso comment period. Attached is a copy of Coso’s dust control plan and permit.

Condition 36 in the permit requires operation of the Coso Junction PM10 monitor. Coso has committed

to multiple watering of the site this week and a crust is beginning to form, so the District will consider

the data to be valid starting on August 1. Chris Ellis, Coso’s site manager, has committed to “water the

**** out of the site” through the rest of the summer. Dan Johnson, our air monitoring technician that

keeps an eye on the site, is in the field today, but we will send you his inspection report in a day or so.

Ted Schade

Air Pollution Control Officer

Great Basin APCD

www.gbuapcd.org

(760) 872

‐ 8211

From: Lo.Doris@epamail.epa.gov [mailto:Lo.Doris@epamail.epa.gov]

Sent: Tuesday, July 27, 2010 10:29 AM

To: Ted Schade

Cc: 'Lanane, Chris'; 'Daniel Johnson'; duaneono@yahoo.com; Taradash.Jan@epamail.epa.gov;

Drake.Kerry@epamail.epa.gov; Ku rpius.Meredith@epamail.epa.gov

Subject: Re: Valid data the the Coso Junction PM-10 monitoring siteTed,

Thank you for your email re: the status of the Coso Junction monitor site. We received no comments on

our proposed redesignation for Coso Junction so we plan to finalize our action this week as required by

the consent decree. We are now in the process of drafting the final language and need to fill in some

blanks with information you refer to in y our message below. Specifically, we will need:

1) a copy of the Coso Operating Company's dust control plan

2) the date(s) when watering and valid data collection begin/began

3) the District's report/findings during it 's inspection of the site this week

Also, if possible, we would like to get a copy of the the permit with the Coso Operating Company which

requires that they maintain this site and an expected date for installation of a web-camera.

Sorry for all these requests, but we believe this info rmation is important for the final redesignation to

attainment of the area and would really apprecia te getting it as soon as possible this week.

Thank you again,

Doris Lo

(415) 972-3959

From: "Ted Schade" <tschade@gbuapcd.org>

To: Doris Lo/R9/USEPA/US@EPA, Kerry Drake/R9/USEPA/US@EPA

Cc: Jan Taradash/R9/USEPA/US@EPA, Meredith Kurpius/R9/U SEPA/US@EPA, "'Lanane, Chris'" <clanane@gbuapcd.org>,

d.org>, <duaneono@yahoo.com> "'Daniel Johnson'" <danj@gbuapc

Date: 07/23/2010 11:58 AM

Subje

ct: Valid data the the Coso Junction PM-10 monitoring site



### Doris and Kerry,

Thanks for the call today. Meredith Kurpius se nt the District some questions regarding the

operation of the Coso Junction monitor and when it will restart collecting va lid data. Here is the

latest:

1. Status of the problems around the Coso Juncti on monitoring site. Are the nearby siting issues

resolved or still being addressed?

### The access road and turn-around area for the Coso Junction site have been covered with gravel

and are no longer emissive. The previously vegetate d areas are to be watered with a water truck

so that they will develop a competent crust that will likely last though the summer. This

summertime watering was done once at the end of J une, but did not form a competent crust. It

will be re-watered early next w eek and will continue to be watered regularly during the summer.

In September these areas will be seeded and wate red with the expectation that the watering and

winter rains will enable the seed to geminate and provide more permanent control.

2. If resolved, when did valid data collection begin?

Valid data collection has not yet begun at this site . The District will insp ect the site next week,

after the watering, in hopes that valid data collection can re-start immediately.

3. Plan or assurance for future site maintenance so that similar problems will not recur. Who will

maintain the site and what tasks will that involve, such as wate ring, graveling, etc.?

Coso Operating Company owns and maintains the site . At this point the plan is to water the untrafficked areas that will eventually be cove red by vegetation and grav el any additional areas

used for access. The District will routinely inspect the site to ensure th e area around the site is

maintained in a non-emissive state. We can, through Coso’s permits, require Coso Operating

Company to maintain the site in a non-emissive condition. The District plans to install a webcamera at the site this summer that will operate during daylight hours. This camera will enable

the District to maintain visual record of any potential local influences on the PM10 monitor. (We

are big on webcams; see our public cams: http://gbuapcd.org/dustcam.htm and secret cams:

http://gbuapcd.org/dustcam/underground/ .)

I just spoke with the Coso Operating Company. Th ey have committed to get the District a draft

dust control plan for the site t oday. I will review and approve ear ly next week. Coso has taken

before-and-after photos of the emissive areas that are now covered with gravel. They will do the

same with the areas to be watered. They will forward these photos to me and I will forward them

to you in order to document the mitigation of the emissions around the site. With a few more

good doses of water, the site should be ready to re-start valid data collection next week.

Give me a call if you have any questions.

### Ted

Ted Schade

Air Pollution Control Officer

Great Basin APCD

www.gbuapcd.org

(760) 872-8211