UNITED STATES ENVIRONMENTAL PROTECTION AGENCY 

REGIONS 

Mr. F. David Martin 

Secretary 

1445 ROSS AVENUE, SUITE 1200 

DALLAS TX 75202-2733 

New Mexico Environment Department 

Post Office Box 5469 

Santa Fe, New Mexico 87502-5469 

Dear Mr. Martin: 

Thank you for providing your correspondence for the New Mexico Environment Department's 

(NMED) 2011 Annual Monitoring Network Plan. The U.S. Environmental Protection Agency 

(EPA) has completed its analysis of the NMED's 2011 Annual Monitoring Network Plan to 

ensure it meets those requirements of 40 CFR Part 58 and its appendices that confer approval 

authority on the Regional Administrator. 

We appreciate your cooperation and work to submit your network plan. The EPA has reviewed 

the proposed particulate matter (PM) monitor changes to the New Mexico Monitoring Network, 

and I am pleased to inform you that your 20 II network plan is approved. The network 

assessment process presents an opportunity for the EPA and the NMED to collaborate on air 

monitoring network design. See 40 CFR Part 58 App. D, 1.1.2. Details regarding our review of 

your air monitoring network are provided in the enclosure. 

In addition, we would like to thank you for your correspondence expressing your interest in 

terminating PM monitoring at two ofNMED's air monitoring sites. The EPA has reviewed this 

information in conjunction with our review of the NMED's 2011 Annual Monitoring Network 

Plan. Details regarding our review are provided in the enclosure. 

We appreciate the NMED's work to upgrade the monitors in the Border and Energy Sectors and 

the NMED's collaborative work done on the ammonia and mercury monitoring special projects. 

We look forward to our continued collaborative work with the NMED on your 2012 ambient air 

monitoring network plan. If you have any questions, please contact me at (214) 665-2100, or 

your staff may contact Ms. Maria Martinez of my staff at (214) 665-2230. 

Enclosure 

Internet Address (UAL) • http:t1Www,epa.govtregion6 

Recycled/Recyclable • Printed with Vegetable Oil Based Inks on 100% Recycled Paper, Process Chlorine Free 
Technical Comments on New Mexico Environment Department (NMED) 20 II Annual 

Monitoring Network Plan 

Change Approvals: 

Particulate Matter (PM) 

We have no objections to NMED's proposal to deploy aiL continuous monitors. for 

PM2. 5 sampling by utilizing the BAM } 020 monitors.. T ransitionirjg to coritiriu!}us 

monitors will be a resource savings to NMED. The BAM I 020 is one. of the instruments 

approved as a Federal EquivalentMethod (FEM) .. Please note any PM2.5 datacoii.ectei:l 

With the BAM I 020 FEM monitors are coiJ1parablefor compliancewith the PM2.5 

National Ambient::Air:Quality Standari:ls.(NMQS). We en~ourage NMED toJearnas 

in\i_ch as. possil:)ka!Xnit iheB!\M I 020 monitors; espeCially aboui.(heir:jiliique operations 

ahddata·generation compared to.the fiher based methods to ensure a.smooth'transition;,to 

the·continuous·instruments. 

We also have no objections to your.proposal to replace PMlO FederaL Reference 

Methoi:l (FRM) m0nitors with PMI 0 tapered element oscillating irij~tobalari~e (TEOl\1) 

monitors, Any: data collected with the continuous PMlO TEOM monitors are:comparable 

for"ompliance with.the.PMlONAAQS, We wm.ild-prefer to.see·aselect mirtib.er ofthe, 

PM2.5 ani:IPMIO sites' c6ntinllous moilitors operated in corijiinction with'theiRM 

mo~ito~ to v~rizy dati! quality unfirtlie TEOM monitors. are stabilize(!. 

The requests to:discontinue the PM2, s· and PM! 0 monitors at the SZG Roswell 

site (Air.Qualiiy System, AQS #35-005"0005) ani:l the 7S Silver City site:(A.QS#35-Q17-

1002) are ajljlr~ve<!. The.20Q8,201Q three year PM2.5design val lies are \y'ell within· the 

PM2.5 24~hour and.annuaLNAAQS (3'5 micrograms per cubic meier, ug/m3;:15 ug/m3) 

with values of 12.7 ug/m3 and p ug/m3 respectively at the SZ(JRos,We!Lsite and I 0.5' 

ug/m3 and 4:8 ug/rilJrespectively at the 7S Silver eity site, In addition, the PMlO 

monitors.atboth sites have·nobreporied any exceedance(s).ofthe 24-hour NAAQS'(150 

ug/ri13) .during 200,8"2,.0 10. The liigl)esfPMl Q Vallie mea5utedatthe 5ZQ R,oswell site 

was 98 ug/m3 in.2008 and at the 7S Silver City site was 32 ug/m3 ih 2009. We conClude 

.that the discontinuation woul9 not COIIlpromise the data collectiori ne~ded for 

imjllerilentation Of the PMIO and:PM2i5 NAAQS, ahdthe 40 CFRPart 58, App. D 

requirements are met. See40 CFR §58.14(c)(l) and Part 58, AIJP· D, 4.6 and4.7. 

Network Assessments: 

Ozone 

The current ozone network for NMED satisfies the. minimum requirements. See 

40 CFR Part 5~, App. D, 4.1. We appreciateNMED's wotk toward.the new rural ozone 

site in Rio Arriba County, 
Carbon Monoxide (CO) 

The current CO network forNMED satisfies the minimwn requirements. See 40 

CFRPart 58, App. D,4.2. 

Nitrogen Dioxide (N07) 

The current N02.network for NMED satisfies the minimwn requirements. See 40 

CFR Part 58, App. D, 4.3. 

Sulfur Dioxide (802) 

The current S02 network for. NMED satisfies the minimum requirements. See 40 

CFR Part 58; App. D, 4:4. The so2·m9nitor 111 the 7T Hurley Smelter ~~te (AQS #35~ 

Ol7-i003) has not come within 20%.ofthe l-hour.S02 NAAQS since2002, withinJ!% 

of, the 24-hour NAAQS since 2001 andwithin !Oo/,o of the annual NAAQS since.2001. 

The operation ofthe 7T Htiriy Smelter S02'fuimitoris included in the. ~tate 

Implementation Plan (SIP) maintenance plan and, any request to discontinue the monitor 

req~if<:s'an update to ~e SW. See 6UR 54627 (September 18, 2003). Any· request for a 

system-modification underAO CFR § S8. i4( c) should be.submitted in Writing to EPA 

Region6. . · 

Requests for Additional Information: 

Please provide .a Written.response for the following PM issues to the EPA Region 6 Air 

Quality Analysis Section Chief within 45 days ofthe date of this letter: 

PM 

The annual monitoring network .plan indicates. that NMED operates collocated 

PM 10 FRM monitors at the 3HM Runnels .site (AQS #35-049~0020) and the 7D Deming 

site(AQS•#35-029-0001). We don't S!=e any Pl\110 data froll'l a collocated m<mitor at 

these sites in AQS: Please check on this itiformation and verify that.the data is in AQS. 

According to the network plan, NMED operates both PM1 0 FRM and PM 10 

TEOM monitors at .the 6CM Anthony site (AQS #35-0 13-0016) and the 6ZG Suriland 

Park site (AQS #35-013-0017). Are the PMlO TEOM monitors collocated with the 

PMlO FRM monitors to meet the 15% collocation requirements? Please note that any 

PM I 0 monitoring-site that.is used to satisfy the 15% collocation• requirements must use 

the same Cl!libratioii, sampling, analysis and verification/validation procedures. See 40 

CFR Part 58, App.A, 3.3.1.2. Please clarify this information. 

The annual monitoring network plan .also indicates that NMEDoperates 

collocated PM2.5 FRM•monitors.at the !FO Farmington site (AQS #35-045-0019). We 
don't see any PM2.5 data from a collocated monitor at this site in AQS. Please check on 

this information and verify that the data is in AQS. 

According'to.AQS; there is·aPMlO TEOM State or Local Air Monitoring 

Stations (SLAM:S) monitor at the 6ZM Desert View site (AQS imc613c0021 ). This 

monitor. is not identified in the annual monitoring network plan. Please check on this 

inforrriation and verify whether this information is accurate in AQS.