# UNITED STATES ENVIRONMENTAL PROTECTION AGENCY REGION IX 

# 75 Hawthorne Street San Francisco, CA 94105-3901 

# DEC 1 1 2013

Mr. Larry Allen Air Pollution Control Officer San Luis Obispo County Air Pollution Control District 3433 Roberto Court San Luis Obispo, California 93401 Dear Mr. Allen: Thank you for your submission of San Luis Obispo County Air Pollution Control District ' s (SLOAPCD's) 2013 Ambient Air Monitoring Network Plan in July 2013. We have reviewed the submitted document based on the requirements set forth under 40 CFR 58. Based on the infonnation provided in the plan , EPA approves all portions of the network plan except those specifically identified below. Please note that we cannot approve portions of the annual network plan for which the infonnation in the plan is insufficient to judge whether the requirement has been met, or for which the information , as described, does not meet the requirements as specified in 40 CFR 5 8.10 and the associated appendices. EPA Region 9 also cannot approve portions of the plan for which the EPA Administrator has not delegated approval authority to the regional offices. Accordingly , the first enclosure 

# (A. Annual Monitoring Network Plan Items where EPA is Not Taking Action) provides a listing of specific items of your agency's annual monitoring network plan where EPA is not taking action
. The second enclosure 

# (B
. Additional Items Requiring Attention) is a listing of additional items in the plan that EPA wishes to bring to your agency's attention. The third enclosure (C. 

# Annual Monitoring N e twork Plan Checklist) is the checklist EPA used to review your plan for overall items that are required to be included in the annual network plan along with our assessment of whether the plan submitted by your agency addresses those requirements
. The first two enclosures highlight a subset of the more extensive list of items reviewed in the third enclosure. All comments conveyed via this letter (and enclosures) should be addressed (through corrections within the plan, additional information being included, or discussion) in n e xt y e ar ' s annual monitoring network plan.

Pri nt ed o n Recycled PapuIf you have any questions regarding this letter or the enclosed comments , please feel free to contact me at (415) 947-4534 or Dena Vallano at (415) 972-3134. Enclosures:

Sincerely, **--f/1~** k_ · _ Meredith Kurpius ,

**Manage ~­**  Air Quality Analysis Office A. Annual Monitoring Network Plan Items where EPA is Not Taking Action B. Additional Items Requiring Attention C. Annual Monitoring Network Plan Checklist cc: Karl Tupper , SLOAPCD Karen Brooks , SLOAPCD Gayle Sweigert, California Air Resources Board

# A. Annual Monitoring Network Plan Items where EPA is Not Taking Action We are not acting on the portions of annual network plans where either EPA Region 9 lacks the authority to approve specific items of the plan , or EPA has determined that a requirement is either not met or information in the plan is insufficient to judge whether the requirement has been met.

• EPA identified items 

# in your agency's annual monitoring network plan where a requirement was not being met or information in the plan was insufficient to judge whether the requirement was being met based on 40 CFR 58.10 and the associated appendices. Therefore , we are not acting on the following items: Item Checklist Row Issue (Attachment A) Instrument parameter code for 49 Not meeting requirement in some instances each instrument Monitoring objective for each 47 Not meeting requirement in some instances instrument Traffic count of nearest road 74 Insufficient information to judge PM 2.s collocation 37 Insufficient information to judge Additional information for each of these items may be found for the row listed in column 2 , in the third enclosure (C. 

# Annual Monitoring Network Plan Checklist).B. Additional Items Requiring Attention • [Item 43]: o The Mesa2 S02 monitor instrument model is listed as API TlOOU with method code 009 instead of method code 100. Assuming this is a typo , please correct in next year's plan. o Nipomo Regional Park N02 monitor listed as API 200 , but doesn't specify which model200. Please clarify in next year's plan. • [Item 44] Per 40 CFR 58 Appendix D, section (2)(e), the EPA Regional Administrator and state or local agencies "may divide the overall MSA/CSA monitoring responsibilities and requirements among the various agencies to achieve an effective network design. Full monitoring requirements apply separately to each affected State or local agency in

the absence of an agreement between the affected agencies and the EPA Regional Administrator." For future plans, please state if an agreement has been made to share network design responsibilities for any MSAs in your jurisdiction and attach documentation. • [Items 52-53] If there is no seasonal sampling or alteration from expected sampling frequency, then the "current sampling frequency" and the " calculated sampling frequency" should be the same. Please clarify in next year's plan. • [Item 74] Traffic counts from sites listing AADT information from 2006 or earlier (Paso Robles , San Luis Obispo , Morro Bay , and Nipomo Regional Park) should be updated in next year's plan if possible. If updated information is not available , please state why and/or when new data are anticipated.

### C. 

### ANNUAL MON I TORING NETWORK PLAN CHECKLIST

(Updated ll/26/20 13 ) Year: 2013 Agency: San Luis Obispo County APCD

40 CFR 58.10(a)(l) requ i res that each Annual Network Plan (ANP) include information regarding the following types of monitors: SLAMS

monitoring stations including FRM

, FEM, and ARM monitors that are part of SLAMS, NCore stations, SlN stations, State speciation stations, SPM

stations , and/or, 

### in serious, severe and extreme ozone nonattainment areas

, P AMS stations

, and SPM monitoring stations.

40 CFR 58.10(a)(l) further directs that, "The plan shall include a statement of purposes for each monitor and evidence that siting and operation of

each monitor meets the requirements of appendices A, C, D

, and E of this part, where applicable

. " On this basis, review ofthe ANPs is based on the

requirements listed in 58.10 along with those in Appendices A, C, D, and E.

EPA Region 9 

### will not take action to approve or disapprove any i t em for which Part 58 grants approval authority to the Administrator rather than the

Regional Administrators

, but we will do a check to see if the required information is included and correct. The items requiring approval by the

Administrator are: P AMS, NCore, and Speciation (SlN/CSN).

Please note that this checklist summarizes many of the requirements of 40 CFR Part 58, but does not substitute for those requiremen t s, nor do its

contents provide a binding determination of compliance with those requirements. The checklist is subject to revision in the future and we welcome

comments on its contents and structure.

Key: White = meets the requirement. Yellow= requirement is not met, or information is insufficient to make a determination. Action requested in next year's plan or outside the ANP

process. (items listed in Enclosure A)



## Pr een 

# I =item requires attention in order to improve next year ' s plan (items listed in Enclosure B)

### ANP requirement
Citation Was the info Does the Notes within 40 submitted?

1 

### If 

### information CFR58 yes, page 

### #s. provided

3 

### meet Flag if incorrect

2 

### ? the req?

4 

### 1. Submit plan by July

1 st

58.10 (a)(l) Yes

, cover letter Yes 2. Statement
of purpose for each monitor

58.
1 0 (a)(1) Yes

, p 4-9 Yes 

### 3. 30-day public comment



## I inspection period

'

58

. JO(a)(1

), Yes, cover letter Yes 58.10 (a)(2) 4. Modifications

to SLAMS network

- case when we 58.10 (a)(2) Yes

, p 3 , 9 Yes are not approving actual system modifications (i.e., 58.10(e

) we will do it outside the ANP process

6 ) 5 . Modifications

to SLAMS network- case when we 58.10 (a)(2)

N / A



## N I A

See Item 4 are approving actual system modifications per 58.10 (b )(5) 58

. 14(c)

58.
I O(e ) 58.14 (c) 6. Does plan include docume ntation (e.g., attached

N/A


## NIA There were no system modifications approved since approval letter) for system modifications that have

last ANP approval. been approved since last ANP approval? 7. NCore site operational (by

1 /11 2011)
58.10 (a)(3) N/A



## N IA
SLO County does not have

a required NCore site. 8. Pb site for 0.5-1.0 tpy sources operational (by 58.10 (a)(4)

N / A

N / A
SLO County does not have any Pb sources
in the 12 / 27 / 2011)

county and therefore

is not required
to hav e any Pb sites

. 9. N0
2 plan for area-wide and RA40 sites submitted by 58.10 (a)(5) 

## NIA

N / A
SLO County does no t have

a requirement
for N02 7 / 1120 12

area-wide monitoring

or RA40 monitoring. 1 0. N0
2 area-wide and RA40 sites operational
by 58.10 (a)(5)

N / A



## N I A

See Item
9 111/2013 II. N0
2 plan for near-road sites submitted by 711 / 2013 58.10 (a)(5)


## N I A

N /A
SLO County does not have

a requirement
for N02 near-road monitoring. 12. 

## so 2 sites operational (by 1/1120 13 ) 58.10 (a)(6)

N / A

N / A
SLO County does not ha v e a requirement
for S02 and 58

. 13(d)

near-road monitoring. 1 Response options: NA (Not Applicable), Yes

, No, Incomplete, Incorrect. The responses "Incomplete" and

" Incorrect

" assume that some information has been provided

. 2 To the best of our knowledge. 3 Assuming the information

is correct 4 Response options: NA (Not Applicable )- [reason

], Yes

, No, Insufficient

t o Judge

. 5 The affected state or local agency mus

t document the process for ob t aining public comment and include any comments

r eceived through the pub

l ic notification process within their submitted plan

. 6 See 58.14

( c)



### 2

### ANP requirement Citation Was the info Does the Notes

within 40 submitted? 1 

### If 

### information
CFR58 yes, page 

### #s. provided 3 

### meet

Flag if 

### the req? 4 

### incorrect 2 

### ?

13. AQS site identification number fo r each site 58.10 (b)(1) Yes Yes
App C - detailed site info

14 . Location of each site: street address and ge o graphic 58

. 10 (b)(2) Yes Yes

coordinates App C - detailed site info

15 . Sampling and analysis meth o d(s) for each measured 58

. 10 (b) (3) Yes Yes Combination of instrument manufacturer/model and

parameter App C - detailed method code provides this information.

site info

16 . Any proposals to remove or move a monitoring 58

. 10 (b )( 5) Yes Yes See note for Item 4

.

station

within a per i od of 18 months following plan
submittal i

17 . Scale of representativeness for each monitor as 58.10(b )(6); Yes Yes

defined in Appendix D AppD pp 4-9; AppCdetailed site info

18 . Identification of s i tes suitable and sites not suitable 58

. 10 (b)(7) Yes Yes

for comparison to the annual PM 2 . 5 NAAQS as p 8; AppCdescribed in Part 58

. 30 detailed site info

19. MSA, CBSA, CSA or other area represented by the 58

. 10 (b)(8) Yes Yes

monitor 20. Designation of any Pb monitors as either source- 58.10 (b)(9) N / A N / A

oriented or non-source - oriented

21. Any source-oriented Pb site for which a waiver has 58

. 10 (b)(IO) N / A N/A

been granted by EPA RA

22 . Any Pb monitor for which a waiver has been 58

. 10 (b)(l1) N / A N/A

requested or granted by EPA RA for use ofPb

- PM 10

in

lieu of Pb- TSP

23. Identificat i on o f required N0 2 monitors as either 58

. 10 (b)(l2) N / A N/A SLO County does not have a requirement for N02

near - road or area-w i de area-wide monitoring or near - road monitoring.

24 . Identificat i on of any PM 2 . 5 FEMs and/ o r ARMs n o t 58

. 10 (b) ( 13) Yes

, p 8; App C- Yes All PM2.5 FEMs are elig i ble to be compared to the

eligible to be compared to the NAAQS (Note 1 : must 58

. 11 (e) detailed site info NAAQS

include required data assessment.) (Note 2: Required

SLAM S must monitor PM 2 . 5 withNAAOScomparable monitor at the required sample frequency. )

25 . For SPMs listed as non-regulatory, n o te the start 58

. 20(c) N / A N/A SLO County does not have any SPMs

.

Date

ofFRM/FEM/ARM at SPM. I f> 24 months, 

### 3

### ANP requirement
Citation Was the info Does the Notes within 40 submitted?

1 

### If 

### information CFR58 yes, page 

### #s. provided

3 

### meet Flag if 

### incorrect

2 

### ? the req?

4 and monitor

is eligible for comparison

to the NAAQS per 58

. 11 (e ) and 58.30

, the agency must supply information that App A , C orE requirements w ere not met. 26. Document how states and local agencies provide for 58.10 (c) Yes

, p 9

Y es the review of changes
to a PM 25 monitoring network that impact the location of a violating PM
2

. 5 monitor. 27

. Does the plan include

a request for approval for and 58.11 (a )( 2) N / A

N / A
SLO County does not have any SPMs. alternative

to appendix

A requirements
for SPMs operating

a FRM

/ FEM/ ARM which also meets appendix E? 28. Precision! Accuracy reports submitted

to AQS 58.16(a);
Yes

, p 10 Yes App A, 1.3 and 5.1.1 29. Annual data certification submitted

58.15 Yes, p 10 Yes App. A 1.3 30. Frequency
of flow rate verification
for manual PM App A 3.3.2

N / A

N / A samplers audit 31. Frequency
of flow rate verification
for automated App A 3

. 2

. 3 Yes

Yes PM analyzers audit

App C - detailed

! site info 32. Frequency
of one-point flow rate verification
for Ph AppA

N / A

N / A samplers audit

3.3 .4.1 33. Frequency

o f one-point QC check

( gaseous)
App. A 3.2.
1 Yes

Yes App C - detailed

I site info

I 34. Date of last Annual Performance Evaluation
App. A 3.2.2 Yes

Yes

I I (gaseous

)

Cover letter and App C -detailed site info 35. Dates of last two semi

- annual flow rate audits for App A, 3.2.4 Yes

Yes PM monitors

and 3.3.3 Cover letter and App C - detailed s i te info 36

. Dates of last two sem

i - annual flow rate audi

t s for Ph AppA

N / A

N / A monitors

3.3.4.1

I 37. PM
2
. 5 collocation

App A 3

. 2
. 5 No

NA
SLO ispart of th e ARB PQAO

, and relies on the 

### 4

## ANP requirement Citation Was the info Does the Notes

within 40 submitted? 1 

### If 

## information
CFR58 yes, page #s. provided 3 

## meet

Flag if 

## the req? 4 

## incorrece?

A p p B, Tab l e B-1 entire PQAO netwo r k to satisfY collocation requirements. It is ARB's res p onsi bil ity t o s h ow that

this req u ireme n t is met. A RB is c u rre n tly working

o n a network doc wn en t t h a t s h o uld a d dress this

.

(SLO

d oes not curren tl y have any collocated monitors . )

38. Designation of a primary monitor 

### if there is more Need to N / A N / A

than one monitor for a pollutant at a site

. determine collocation

39. Distance between collocated monitors (Note: waiver App.A N / A N / A

request or the date of previous waiver approval must 3

. 2.5

. 6 and

be included 

### if the distance deviates from 3.2.6.3 requirement.)
40. Manual PM 10 method collocation met? (note : AppA 3.3.1 N / A N / A

continuous PM 10 does not have 

### this requirement)

41. Pb collocation AppA N / A N/A

3.3.4.3

42 . PM 10 • 2 . 5 collocation (note: only applies to Fresno and App A 3.3.6 N/A N/A

Phoenix NCore sites)



### 43. Instrument/monitoring method code for each App 

# c 2.4.12 Yes Ye8 in 

### most cases, The Mes82 80

2 

### m0mtor ins1lrument 

### model is 

## listed as

monitor:

is 

### it reported properly? Is 

### it 

### reported App 

# c -detailed incorrect in 

### certain API TlOOU with method code 009 instead of method

correctly (ie., appropriate method! code for site info cases. See 

### notes. code 100. AsslUIW1g 

### this is a typo, please correct in



### regulatory monitors)? next year's plan. Nipomo Regional Park

**N~** 

### monitor listed as API



### 200- which model200? Please clarify in 

### next year's

plan.

44 . For agencies that 

### share monitoring responsibilities in 

### AppD2(e) Yes

, p4 Insufficien t to

an

MSA/CSA: does each affected State or local judge

agency meet full 

### monitoring requirements 

### or is



### an agreement between the affected agencies and the

EPA **Regi~nal** 

### Administrator in 

### place?

45. Start date for each monitor Required to Yes Yes determine if App C - detailed

other req. site info

(e.g ., min# and colloc) are met 

### 5

## ANP requirement
Citation Was the info Does the Notes within 40 submitted?

1 

### If 

## information CFR58 yes, page #s. provided

3 

## meet Flag if 

## the req?

4 

## incorrect

2 

## ? 46. Instrument monitor type for each monitor Required

to Yes

Yes determine

if App C - detailed other req. site info (e.g

. , min# and colloc) are met 47. Monitoring objective for each instrument

App D 1.1 Yes; incomplete
Yes in most cases; All SLAMS that collect data with FRM or FEMs can 58.10 (b){6) for PM
I 0 at CARB no for PMIO at be compared

to the NAAQS and therefore must sites CARB sites include the objective of

" NAAQS"- note that it is App C - detailed acceptable

to have more than one objective. site info 48. Site type for each instrument

App D 1.1.1 Yes

Yes App C - detailed

I site info

I 49

. Instrument parameter code for each instrument Required

to Yes in most cases; Yes in mos

t cases; The parameter code for PM 10 at the CARB sites is determine

if incorrect for PM
I 0 no for PM
I 0 at listed as 8510
I. The only acceptable PM

1 0 parameter

1 other req.

at CARB sites CARB sites code for SLAMS

is 81102. Please correct
in next (e.g
., min # App C - detailed

year

' s plan. and colloc) site info are met

I I 50. Instrument parameter occurrence code for each Required

to Yes

Yes instrument

determ

i ne if App C - detailed other req. site info (e

. g. , min# and colloc) are met 51. Sampling season for ozone (n o te: date of waiver 58.10 (b)(4) Yes

Yes approval must be included
if the sampling season App D , 4.l(i) App C - detailed deviates from requirement)

site info 52. Sampling schedule for 

### PM 25

- applies to year-round 58.10 (bX4> Yes-see
Yes Note: 

### if there 

### is no seasoniil sampling or alteration 

### and seasonal sampling schedules (note: date of 58.12(d) clarification

in

from expected sampling frequency, then the "current waiver approval must 

### be included


### if llhe sampling AppD4.7 notes
sampling frequency'' and the "calculated sampling season deviates from requirement)

EPA App C- detailed frequency'' should be the same. flowchart
site info 53. Sampling schedule for 

### PM 10
58.10 (bX4) Yes

- see Yes Note: 

### if there is no seasonal sampling or alteration 58.12(e) clarification

in

from expected sampling frequency, then the "current AppD4.6 notes
sampling frequency" and the "calculated sampling App C - detailed frequency" should be the same.



### 6ANPrequirementCitationWastheinfoDoestheNoteswithin40submitted?11finformationCFR58yes,page#s.provided3meetFlagifthereq?4incorrect2?siteinfio54.SamplingscheduleforPb58.10(b)(4)N/ANIA58.l2(b)App04.555.SamplingscheduleforPM10_2_558.10(b)(4)N/AN/A58.12(f)App04.856.Minimum#ofmonitorsfor03[Note:shouldbeApp0,4.1(a)YesYessupportedbyMSAID,MSApopulation,DV,#andAppA,Table A-1monitors,and#requiredmonitors](seefootnote)7Table0-257.Identificationofmax.cone.03monitor(s)App04.1(b)YesYesAppC,C-1558.Minimummonitoringrequirementsmetfornear-App04.3.2N!ANIASLOCountydoesnothavearequirementforN02roadN02(2014startdate)nearroadmonitoring.59.Minimummonitoringrequirementsmetforarea-App04.3.3N/AN/ASLOCountydoesnothavearequirementforN02wideN02area-widemonitoring.60.MinimummonitoringrequirementsmetforRA-40App04.3.4NIAN/ASLOCountydoesnothavearequirementforN02N02RA40monitoring.61.MinimummonitoringrequirementsmetforS02App04.4YesYes[Note:OnlymonitorsconsideredtoberequiredAppA,A-3SLAMsareeligibletobecountedtowardsmeetingminimummonitoringrequirements.]62.MinimummonitoringrequirementsmetforPbAppD4.5YesYesSLOCountydoesnothavearequirementPb[Note:Onlymonitorsconsideredtoberequired58.13(a)AppA,A-4monitoring.SLAMsareeligibletobecountedtowardsmeetingminimummonitoringrequirements.]63.Minimum#ofmonitorsforPM2.5[Note1:shouldbeAppD,Yes,YessupportedbyMSAID,MSApopulation,OV,#4.7.1(a)andAppA,A-1monitors,and#requiredmonitors][Note2:OnlyTableD-5monitorsconsideredtoberequiredSLAMsareeligibletobecountedtowardsmeetingminimummonitoringrequirements.l64.OptionalPM2.5NetworkClarifications:ProvidealistNeedtoN/ANIAofrequiredsitesifitdoesnotincludeallSLAMS.assessseveral-------7OnlymonitorsconsideredtoberequiredSLAMsareeligibletobecountedtowardsmeetingminimummonitoringrequirements.Inaddition,ozonemonitorsthatdonotmeettrafficcount/distancerequirementstobeneighborhoodscale(40CFR58AppendixE,TableE-1)cannotbecountedtowardsminimummonitoringrequirements.II7ANPrequirementCitationWastheinfoDoesthe Noteswithin40submitted?'IfinformationCFR58yes,page#s.provided3meetFlagifthereq?4incorrece?[Note:defaultwillassumeallSLAMSarerequirementsconsideredrequiredsites.]65.RequiredPM2.ssitesrepresentarea-wideairqualityAppDYesYes4.7.l(b)Seesitetypeinfoinpp.4-9andAppc66.ForPM2.5,isatleastonesiteatneighborhoodorAppDYesYeslargerscaleinanareaofexpected maximum4.7.1(b)(1)Seesitetypeinfoconcentrationinpp.4-9andAppC(C-7)67.IfadditionalSLAMSPM2.5required,isthereasitein_AppDN/AN/AOnlyonePM2.5siteisrequired.anareaofpoorairquality4.7.1(b)(2)68.MinimummonitoringrequirementsforcontinuousAppD4.7.2YesYesPM2.sAooA,A-269.RequirementsforPM2.5backgroundandtransportAppD4.7.3N/AN/A-StatesitesRequirement70.ArePM2.5ChemicalSpeciationrequirementsmetforAppD4.7.4N/AN/ATherearenoCSNsitesinSLOCounty.officialSTNsites?71.Minimum#ofmonitorsforPM10AppD,4.6YesYes(a)andTableAppA,A-2D-472.MinimummonitoringrequirementsmetforPM10.2.5AppD4.8N/AN/AThisrequirementonlyappliestoNCoresitesandmasstherearenorequiredNCoresitesinSLOCounty.73.DistanceofsitefromnearestroadAppE6YesYesAppC-detailedsiteinfo74.TrafficcountofnearestroadAppEYesInsufficienttoTrafficcountsfromsiteslistingAADTinformationAppC-detailedjudgefrom2006orearlier(PasoRobles,SanLuisObispo,siteinfoMorroBay,andNipomoRegionalPark)shouldbeupdatedinnextyear'splanifpossible.Ifupdatedinformationisnotavailable,pleasestatewhyand/orwhennewdataareanticipated.75.GroundcoverAppE3(a)YesYesIAppC-detailedIsiteinfo76.ProbeheightAppE2YesYesAppC-detailed8

### ANP requirement Citation Was the info Does the Notes

within 40 submitted? 1 

### If 

### information
CFR58 yes, page 

### #s. provided 3 

### meet

Flag if 

### the req? 4 

### incorrect 2 

### ? site info

77. Distance from supporting structure AppE2 Yes Yes
App C - detailed site info I



### 78 . Distance from obstructions on roof App E 4(b) Yes Yes
App C

- detailed site info

79. Distance from obstructions not on roof App E 4(a) Yes Yes
App C - detailed site info

80. Distance from trees AppE5 Yes Yes
App C

- detailed site info

81. Distance to furnace or incinerator flue App E 3(b) Yes Yes
App C

- detailed site info

82. Unrestricted airflow App E, 4(a) Yes Yes

and 4(b) App C

- detailed site info

83. Probe material (if applicable) AppE9 Yes Yes
App C

- detailed site info

84. Residence time (if applicable) AppE9 Yes Yes
App C- detailed site info -----

--- 

### 9

### Public Comments
on Annual Network Plan Were comments submitted

to the S/LIT agency during the public comment period? No. If no, skip the remaining questions. If yes: • Were any of the comments substantive? o If yes, which ones? o Explain basis for determination

if any comments were considered not substantive: • Did the agency respond
to the substantive comments? o If yes

, was the response adequate? • Do the substantive comments require separate EPA response (i.e., agency response wasn't adequate)? • Are the sections of the annual network plan that received substantive comments approvable after consideration

of comments? o If yes, provide rationale:

10