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Carbon Monoxide

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					                Carbon Monoxide Updating & Screening Assessment
(A) Monitoring data           Overview
                              Stage 1 assessment revealed no areas of concern and so there
                              was no monitoring undertaken. Consideration of the background
                              data avaialble on the archive site shows the background values not
                              to be significant. Guidance indicates that exceedance of the
                              objective is very unlikely to occur except at very busy roads and/or
                              junctions in built up areas.

                              Approach
                                                                National    Inventory   background
                                                                concentrations show average of 0.21
                                                                     3
                                                                mg/m (Range 0.17 to 0.28) cf
                                                                                         3
                                                                annual standard 10 mg/m ( 8 hour
                               Collate all CO monitoring data   average). Monitoring data shows
                                                                there is no exceedance of the 8-
                                                                hour objective when annual mean is
                                                                         3
                                                                <2 mg/m

(B) Very busy roads or        Approach
junctions in built up areas
                              There are no busy roads as defined in the LAQM.TG(03)
Conclusion
                              Traffic flow data from Gloucestershire County Council
                              indicates that there are no roads or junctions that meet
                              the above criteria in Tewkesbury Borough Councils area.
                              There have been no significant changes within the
                              district since the Stage 1 review, which concluded that
                              further assessment of this pollutant, was not necessary.
                              Therefore there is no requirement to proceed with a
                              further detailed assessment for this pollutant.
                      Benzene Updating & Screening Assessment
(A) Monitoring data             Overview
                                Stage 1 assessment revealed no areas of concern and so there
                                was no monitoring undertaken. Consideration of the National
                                background data shows the background values not to be
                                significant.
(B) Very busy roads or          Approach
junctions in built up areas
                                There are no busy roads as defined in the LAQM.TG(03)
(C) Industrial Sources          Approach

                                There are no industrial sources as defined in the LAQM.TG(03) of
                                concern within within or adjacent to the Borough.
(D) Petrol Stations             Approach

                                There are no petrol stations with accommodation within 10 metres
                                as defined in the LAQM.TG(03)
(E) Major fuel storage depots   Approach
(petroleum only)
                                There are no fuel depots as defined in the LAQM.TG(03)
Conclusion
                                The only relevant area for concern found was that associated
                                with Service Stations purveying petrol. Examination of known
                                service stations in the Borough show that none fall within the
                                above distance criteria in Tewkesbury Borough Councils area.
                                There have been no other significant changes within the
                                district since the Stage 1 review, which concluded that further
                                assessment of this pollutant, was not necessary. Therefore
                                there is no requirement to proceed with a further detailed
                                assessment for this pollutant.
                  1,3 Butadiene Updating & Screening Assessment
(A) Monitoring data           Overview
                              Guidance indicates that on a National level monitoring data shows a
                              running average well below the the 2003 objective for this pollutant.
                              In respect of Industrial premises there are 2 Rubber processes,
                              potentially capable of producing the pollutant, prescribed as Part B
                              Authorised Premises in the Borough Councils area of responsibilty.

(B) New Industrial Premises   Approach
                              There have been no new industrial premises, capable of producing
                              this pollutant, introduced either into or adjacent to the Borough area
                              since the Part 1 Review and Assessment.
(C) Industrial Sources        Approach
                              Two Industrial processes both Authorised under LA-PPC are known to
                              produce raw rubber and various products within the Borough and potentially
                              emit this pollutant. Whilst initially they were both considered and assessed
                              as not likely to give rise to a problem with production of 1,3 Butadiene, one
                              of the sites now produces raw rubber for all of its operations in the UK and
                              produces considerably more product than the smaller of the 2 operations.
                              This has led to an increase in overall emissions. The firm achieves
                              compliance with the requirements of the authorisation via Clause 19 of
                              Guidance Note PG6/28(97) in terms of Kilogrammes of solvent emitted per
                              tonne of rubber processed. In 1992 the figure was 33.3 Kg solvent/tonne of
                              rubber reducing to 1.2 Kg solvent/tonne of rubber in 2001 and rising again
                              in 2002 up to 3.4 Kg solvent/tonne of rubber. The firm was approached in
                              2001 and undertook an assessment and calculations in order to produce an
                              annual mass emission and concentration figure in respect of 1,3 Butadiene
                              at the site boundary.


(D) Emission Results          Approach
                              A series of readings were taken from 3 stacks concerned. These
                              resulted in an assessment of background levels being made by the
                              consultants conducting the measurements. The total mass emission
                              was calculated at 1.87 kg per year, which was well below the level
                              which the nomogram provided in the guidance would indicate that a
                              problem might exist.The calculations were, in addition, checked by
                              Consultants to the Council.
Conclusion
                              As there is no likelihood of the objective for this pollutant to be
                              exceeded guidance indicates that no further action need be
                              taken.
                      Lead Updating & Screening Assessment
(A) Monitoring data            Overview
                               Stage 1 assessment revealed no areas of concern and so there
                               was no further monitoring undertaken. Consideration of the
                               background data shows the background values not to be
                               significant.
(B) New Industrial Processes   Approach
                               There are no industrial sources as defined in the LAQM.TG(03) of
                               concern within within or adjacent to the Borough.
Conclusion
                               There have been no significant changes to industries in
                               or around the district that would give rise to
                               exceedences, therefore there is no requirement to
                               proceed further for this pollutant.
                                                        Nitrogen Dioxide Updating & Screening Assessment
     Road Traffic
                                                                                         Overview
                                 DMRB predicted NO2 concentrations based upon the 2001 traffic data were generally in reasonable agreement with measured data
                                 from diffusion tubes deployed in the area.
                                 No exceedences were predicted by the DMRB Screening Method, either for the 2001 or 2005 traffic data at any of the locations
                                 considered.
                                 DMRB estimates for 2005 traffic data show reductions, relative to 2001 data, in ambient NO2 concentrations of between 4 and 7 µg m-
                                 3 in the vicinity of the roads considered.
                                 Differences were observed between predictions for the 2 sites in Tewkesbury High Street. These differences were attributed to the
                                 fact that the Vidivision site has taller buildings around it and is closer to the carriageway and provides a greater restriction to the
                                 dispersal of pollutant emissions from passing vehicles. The Vididvision site has been subject to real time chemiluminescent
                                 measurements and the Authority are satisfied with the diffusion tube data and accuracy of the predictions.

                                 Using the 2001 traffic data for Withybridge Gardens, immediatley adjacent to the M5, the DMRB Screening Method predicted an
                                 exceedence of the Annual Objective Value of 40 µg m‑3 for NO2 in 2003 cf the measured value of 38 µg m‑3. It was recommended
                                 by Consultants that Tewkesbury Borough Council should consider the need for an extended measurement programme using the
                                 reference chemiluminescence method to quantify ambient NO2 concentrations more accurately.

      Monitoring
(A) Monitoring data outside an   Action
AQMA

                                 The data provided below are collated from the 20 Nitrogen Dioxide diffufion tubes located through out the Borough's area of
                                 responsibility. Six tubes are located to accord with the National NO2 survey requirements and all are located in areas deemed to be
                                 at risk of possibly exceeding the annual average objective following the earlier Review and Assessments conducted by the Authority.
                                 The tube supplier was changed on 1 April 2002 from AEA to GRADCO using the same preparation 50:50 TEA. Tube Bias was
                                 established by exposing 3 tubes every month at Cheltenham Borough Councils real time chemiluminescent urban monitoring station.


                                 Approach
                                                                      Collated data since 1 April 2002
  Date/Site Number    1     2   3      4         5       6      7    8      9   10     11   12     13  14  15    16   17    18    19    20     21
Apr-02               16    13   6      8         6      13      7     6     7    16    9           10  10   8     4    3     3    3      8
May-02               10    16   4      5         9      15     10     6     6    16    11    6     9        9     4    2     3    2      6
Jun-02                7     9   5      2        11      16     12     8    11    20    16    8     16  12  10     6    3     3    4     10
Jul-02               17    22   6      6         9      13     13     7     6    18    14    9     13  14  11     4    2     4    2     10
Aug-02               15    16   7      6        10      10     11     5     7    11    15   10     16  15   8     5    3     4    3     12
Sep-02               11    12   11     10       12       8     10     4     7    15    8     8     6    9   8     5    3     5    4     11
Oct-02               10     9   5               10       6      8     3     6    12    6     6     5    7   7     4    3     4    3      9
Nov-02                8     7   4               13      12     11     9    11    14    13   12     13  12  12     11   9     9    8     14
Dec-02                0    16   12     11       17      18     14    10    13    20    14   10     17  16  12     9    8     7    5     12     17
Jan-03                0    20   10     11       17      18     14    10    13    20    15   10     17  16  12     9    8     7    5     12     17
Feb-03               23         14     13       19      14     17    15    14    18    17   17     17  17  19     12  11    12    11    18     19
Mar-03               17    18   10     10               18     15    13    14    20    19   12         17  13     7    7     8    6     16     17
Apr-03               17    15   8      8        14      14     13     9    10    18    17   10     15  14  12     5    6     6    5     19     12
May-03               13    20   5      5        10      16     11     7     8    19    13          11  13   8     4    3     3    2      7     8
Average ppb          11    14   7      7        12      13     12     8    10    16    13   10     13  13  11     7    6     6    6     12     16
Average mgm/m3       21    26   14     14       22      25     22    15    18    31    25   19     24  25  21     13  11    12    11    24     30
Bias Factor          1.2   1.2 1.2    1.2       1.2     1.2 1.2 1.2 1.2 1.2 1.2 1.2 1.2 1.2 1.2 1.2 1.2 1.2 1.2 1.2 1.2
Corrected Value      25    32   17     17       26      30     27    18    22    38    30   23     29  31  25     16  13    15    13    28     36
Limit Value          40    40   40     40       40      40     40    40    40    40    40   40     40  40  40     40  40    40    40    40     40
                      The DMRB Calculations associated with sites indicated as below were subcontracted to Millenium Science and their report is
                                                                              attached.
                    Site Location    Grid Ref 1                                           Site Description
Site 1 = Sutherlands                   895327     Tewkesbury High Street Location                            DMRB
Site 2 = Vidivision                    889324     Tewkesbury High Street Location                            DMRB
Site 3 = Tewkesbury Hospital           897327     Back ground site NO2 Survey
Site 4 = Mitton School                 902327     Back ground site NO2 Survey
Site 5 = Dupont                       888 164     Brockworth High Street location NO2 Survey
Site 6 = Windrush Belmont Ave          875169     M5 Site survey
Site 7 = 32 Ermin Street              895 163     Background site NO2 Survey
Site 8 = 40 cedar Road                886 173     Background site NO2 Survey
Site 9 = 3 Stocken Close               876168     M5 Site survey
Site 10 = Withybridge Gds              905255     M5 Site survey                                             DMRB
Site 11 = High Street. Winchcombe.    026 284     Town centre location                                       DMRB
Site 12 = White Bear                  896 333     Town centre location - possible road extension
 Site 13 = 77 Sussex Gds B'ckworth     897173     M5 Site survey                                             DMRB
Site 14 = Ashchurch Village Hall.     928 333     A46 Roadside location                                      DMRB
Site 15 = Shorekarn.                  904 331     A46 Roadside location
Site 16 = Woolstone.                  968 305     Background site NO2 Survey
Site 17 = Chargy Hill Farm.           805 235     Background site NO2 Survey
Site 18 = Harkaway.                   853 323     Background site NO2 Survey
Site 19 = Snowshill.                  095 335     Background site NO2 Survey
Site 20 = Showborough.                907 382     M5 Site survey
Site 21 = Sussex Gardens              877 172     M5 Site survey new location                                DMRB
                                                                    Monthly Nitrogen Dioxide Results TBC Monitroring Stations 2002 - 2003


                       30

                       25
   Parts Per Billion




                       20

                       15

                       10

                       5

                       0
                            37257   37288     37316    37347       37377   37408   37438    37469      37500   37530   37561    37591      37622   37653    37681   37712   37742
                                                                                                                       Month

                            Tewkesbury - Sutherlands High Street              Tewkesbury - Vidivision High Street              Tewkesbury -Hospital                           Tewkesbury - Mitton Scholl
                            Brockworth - Dupont                               M5 (S) - Belmont Avenue Windrush                 Brockworth - Ermin Street                      Brockworth - 40 Cedar Road
                            M5 (S) - Stoken Close                             M5 (CEN) - Withybridge                           Winchcombe - High Street                       Tewkesbury - White Bear
                            M5 (S) - Sussex Gardens                           A46 - Ashchurch Village Hall                     A46 - Tewkesbury Shorekarn                     Woolstone Oxenton Hill
                            Maisemore Chargey Hill                            Fothampton Harkaway                              Snowshill                                      M5 (N) - Showborough
                            M5 (S) - Sussex Gardens

The above graph is a representation of bias corrected data since measurements with Gradco Tubes started in April 2002. It includes data from January
2002 collected using AEA supplied tubes, for comparison. As may be seen the overall trend is downwards. The drop in values in April 2002 was a
consequence of the change of tube supplier however the downward trend continues. As may be seen the results are less disparite in May 2003 cf
January 2002 and may be indicative of laboratory accuracy.
(B) Monitoring Data within an       Approach
AQMA


                                  The AQMA jointly declared by the Stroud and Tewkesbury Authorities has now been revoked. The associated Stage 4 Report was
                                  accepted by DEFRA (Letter dated 21 May 2003). The DEFRA response drew to the Authorities attention the need to keep the
                                  situation under careful monitoring review in the period to 2005 in order to confirm the DMRB predictions. A Copy of the report is
                                  attached.
(C) Narrow congested streets with Approach
adjacent residential properties


                                    Sites numbered 1, 2 & 11 are all Town centre locations and which fit in with the definition of potential Street Canyons. As may be
                                    noted from the results of diffusion tube monitoring (25, 32 & 30 µg m3 ) respectively there seems little cause for concern. DMRB
                                    calculations carried out by MSE (based on Version 1.01 February 2003) for 2005 gave values of 30, 34 & 30 µg m3 respectively.

(D) Junctions                       Approach


                                    Sites numbered 1, 10 & 13 were identified as falling into this category. The measured results for 2002 were 25, 38 and 29 µg m3
                                    respectively. The MSE report indicated that the DMRB values based on traffic flows for 2001 were likely to continue to fall. However
                                    given the constraints of the DMRB and the accuracy of the diffusion tube the Withybridge site may remain borderline in terms of
                                    compliance for 2005. Note that MSE were only given data up to and including Feb 2003. Subsequent data appears in this report,
                                    which may account for slight differences in values quoted by MSE.
(E) Busy Streets people exposed     Approach
> 1 hour

                                                                   There are no locations within the Borough similar to those mentioned
(F) Roads with high flows of        Approach
buses and/or HGV's
                                                                   There are no locations within the Borough similar to those mentioned
(G) New Roads constructed or        Approach
proposed since the first round of
R & A.
                                    The A46 at Ashchurch was highlighted in the stage 3 R&A. It was intended to alter the line of the road such that the traffic would
                                    move a further 6 metres away from a sensitive school location. This allied with the predicted drop for 2005 as calculated by DMRB
                                    should bring the final value well within the objective value for 2005.The road is currently in the construction phase.
(H) Roads close to objective           Approach
during the first round of R&A.


                                       The M5 AQMA has now been revoked but it is intended to conduct further chemiluminescent measurements to confirm predictions

(I) Roads      with    significantly   Approach
changed traffic flows.
                                                                      There are no locations within the Borough similar to those mentioned
(J) Bus   Stations                     Approach


                                                                      There are no locations within the Borough similar to those mentioned
(k) New Industry                       Approach
                                                                     There is no new industry in the Borough with any significant emissions
(L)  Industrial    sources    with     Approach
substantially increase emissions


                                                         There are no industrial premises within the Borough with any substantially increased emissions
(M) Aircraft                           Approach
                                                                      The criteria for assessement are well below the required parameters.
(N) Diesel & Coal-Fired                Approach
locomotives

                                       There is a Network Rail line and preserved Railway in the Borough. Both types of locomotive in use emit nitrogen oxides but
                                       guidance indicates that there is no evidence to suggest that there is any risk of either the 1 - hour or annual mean objectives for
                                       nitrogen dioxide in 2005 being exceeded.

Conclusion
                                       NO2 is set to achieve compliance with the objective target values for 2005. In accordance with advice received in
                                       respect of the revocation of the AQMA at Hucclecote (joint declaration with Stroud) it is intended to monitor
                                       actual values of NO2 at sites close to the M5 during 2004 in order to confirm the predictions for 2005 and 2010.
                                             Particulate (PM 10) Updating & Screening Assessment
(A) Monitoring Data outside AQMA             Overview
                                             The Part 3 Review and Assessment conducted by TBC indicated that there was no likely exceedances of the
                                             NAQS Objective likely to take place in the Borough. More recent data obtained from the two monitoring stations
                                             at Cheltenham (urban) and Forest of Dean (rural) indicates those locations being well within limits. There
                                             seems little cause for concern in Tewkesbury Borough area.
(B) Monitoring Data inside AQMA              Action
                                             The AQMA previously declared is now in the process of being rescinded. A special report undertaken during
                                             the Part 3 Review and Asessment alongside the M5 (a primary source or particulate) showed levels well below
                                             the National objective. See the following site for more detail:
                                             http://www.tewkesburybc.gov.uk/living/health/documentation/air_quality.pdf
(D) Junctions                                Action
                                             There were 10 junctions assessed as over 10000 vehicles per day identified. This included Tewkesbury Town
                                             Centre as well as Motorway junctions with Trunk and minor roads all with relevant exposure within 10m. DMRB
                                             Calculations were undertaken for several of these locations. There were no exceedances of either the 40
                                             µg/m3 (Gravimetric) annual mean or the 50 µg/m3 (Gravimetric) 24 hour mean x 35 values predicted for 2004.

   Location         Year           Dist to      Flow          LDV          HGV               Back                 Annual                  Days
                                   Centre       AADT           %            %               Ground                 Mean                 Exceeded
Tewkesbury          2004             10         10800          98            2                17.6
Cross               2004             10         5000           98            2                17.6
                    2004             10         11600          98            2                17.6                  29                      23
Withybridge         2004             40         71200          91            9                17.6
                    2004             90         18300          96            4                17.6                  23                       8
Teddington          2004             20         14200          93            7                17.6
                    2004             15         6300           98            2                17.6
                    2004             15         15300          93            7                17.6
                    2004             10          8600          98            2                17.6                  28                      23
Sussex Gdns         2004            400         39700          92            8                17.6
                    2004             40         64572          91            9                17.6                  21                       5
(E) Roads with High Flows HGV & Buses               Action
                                                    There were no unusually high levels of HGV and Bus flow (i.e. over 20%) noted. The DMRB calculations at (D)
                                                    covered the highest known.
(F) New Roads since last round                      Action
                                                    A new railway bridge on the line of the A46 is currently under construction.This will improve the AQ situation as
                                                    reported in the Part 3 Review and Assessment. The road has been taken further away from existing target
                                                    population by an extra 10 meteres or more thus leading to improvements in measured levels.
(G) Roads close to objective in last round          Action
                                                    Covered in the assessment at (D)
(H) Roads with significantly changed      traffic   Action
flows
                                                    There are no roads with significantly changed traffic flows
(I) & (J) New and Substantially increased           Action
emissions from Industry

                                                    There are no new industrial processes neither are there any which have significantly increased emissions
(K) & (L) Coal Burning and Quarries etc             Action


                                                    There is little coal burning within the Borough and only one quarry. The latter has no sensitive premises within
                                                    .5 of a mile. The landfill operation within the area is controlled by the Environment Agency and conditions exist
                                                    to control particulate emissions.
(M) Aircraft                                        Action
                                                    Gloucester Airport is a small provincial airfield and passenger numbers are extremely small with only light
                                                    aircraft traffic on a daily basis and one regular flight to Jersey which operates at weekends. It falls outside the
                                                    suggested parameters requiring further work
Conclusion
                                                    There have been no significant changes to industrial proccesses in or around the district or changes in
                                                    traffic numbers that would be likely to affect levels of PM10. Therefore, against 2004 objectives it is not
                                                    likely that exceedences will occur. Further assessment will be considered for the next progress report
                                                    taking into consideration TG(03) for 2010 objectives.
                      Sulphur Dioxide Updating & Screening Assessment
(A) Monitoring data                    Overview
                                       Stage 1 Assessment revealed no areas of concern regarding this
                                       pollutant. Following discussion with the Gloucestershire Pollution
                                       Group a diffusion tube was placed in the north of the area as part of
                                       an area wide monitoring regime to look at background levels only.
                                       The measurements were made in concert with others in different
                                       parts of the area i.e. Forest of Dean, Cotswold and Stroud (see
                                       table below).
                                             Annual Average SO3 Diffusion Tube Data
                                       Site           1999       2000       2001        2002
                                       FOD 1            4         3.3         4          2.3
                                       FOD 2           6.7        6.2        2.2         2.9
                                       FOD 3           6.8
                                       COTSWOLD 2.8               4.2
                                       STROUD                                7.4         6.9
                                       STROUD                                5.1         6.4
                                       TEWKESBURY      6.9        4.3        3.7
                                                  Annual Average Standard 20 µg/m3
                                       As may be seen there are very low ambient concentrations of
                                       sulphur dioxide recorded by diffusion tube over the period with a
                                       general decrease evident. Annual mean concentrations of sulphur
                                       dioxide are well within the 20 µg m3 limit prescribed by the AQS
                                       for the protection of vegetation and ecosystems.
[C] New Industrial Sources             Action
                                       There is no new industry either in or adjacent to the Borough which
                                       uses significant amounts of hydocarbons other than gas.
  [D] Industrial Sources - increased
              emissions
                                                                       Action
                                       There is no new industry either in or adjacent to the Borough which
                                       uses significant amounts of hydocarbons other than gas.
[E] Domestic Burning                   Action
                                       There is no significant coal burning in the area under review nor in
                                       adjacent areas.
[F] Boilers > 5MW(Thermal)             Action
                                       There are no boilers in this category using any fuel other than gas.

[G] Shipping                           Action
                                       There is no shipping other than canal barges used for social
                                       purposes
[H] Railways                           Action
                                       There is one Network Rail main line route through the District but
                                       only 1 station for local trains. There is in addition a preserved
                                       railway operating in the District using both Steam and Diesel
                                       locomotives.
Conclusion
                                       There are no major concerns regarding emissions of SO2 in
                                       the area either from industry or domestic sources. The matter
                                       of exposure to coal generated SO2 from Steam locomotives is
                                       one which will require further work to be undertaken and it is
                                       hoped to collaborate with other local authorities in similar
                                       situations          to      progress         this       issue.
                                       A detailed assessement will therefore need to be undertaken in
                                       this specific area.
There are no major concerns regarding emissions of SO2 in
the area either from industry or domestic sources. The matter
of exposure to coal generated SO2 from Steam locomotives is
one which will require further work to be undertaken and it is
hoped to collaborate with other local authorities in similar
situations          to      progress         this       issue.
A detailed assessement will therefore need to be undertaken in
this specific area.

				
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