STP - Water, Air Quality and Noise level Test Reports

[Govindan]

Dear Members,

The samples of STP Treated Water were tested in Feb 2016.

The Air Quality test and Noise level tests were conducted then. 

The reports of Results of the same is attached. 

The TNPCB Standards is also attached. 

The following points are worth noting - 

(All references to TNPCB Standards)

Discharge of Sewage - Table 2.4 (Page 17)

Drinking Water - Table 2.5 (Page 18)

Class A - Drinking water source without conventional Treatment but after disinfection.

Class B - Outdoor Bathing 

Class C - Drinking water source with conventional Treatment followed by disinfection.

Class D - Fish Culture and Wildlife Propagation 

Class E - Irrigation, Industrial Cooling or Controlled Waste Disposal.

ph value - meets specification for Class A

Total Suspended solids value - not found in the table

Total Dissolved solids value - meets specification for Class C

COD value - not found in the table 

BOD value - meets specification for Class B

Chlorides value - almost meets specification for Class A

Sulphates value - meets Specification for Class A

Oil and Grease value - not found in the table

Air Quality - Table 4.3 - Page 40. 

Sulphar Dioxide - meets specification for Ecologically sensitive area (20) - (Residential Area - permissible level is 50) - 

Measured 6.80 near STP Collection Point; and 6.35 near STP Plant

Carbon-di-oxide - not specified in the Table. 

Noise Level - Table 5.3.5 (Page 44)

Actual measured 70.78 dBA Maximum - Specification Max 75 dBA

For information of all. 

V Govindan

for COM

[seshadri seshadri]

Gentlemen

I beg to differ

Notice standard for residential are is 55 db in day time and 45 db during night.

With regard to air quality I will reply in my subsequent mail.

Please note the consistency of notice level and it is not touch and go.

Average will not work since the distance carry and notice level vary.

Values were taken when all door and windows closed and denying our own fan, tv notices.

Thanks

Regards

Seshadri

Sent from my iPad

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<Water-Air-Noise Feb 16.pdf>

<tnpcb_standards.pdf>

[seshadri seshadri]

Gentlemen/Gentlewomen

Thanks for updating on efficiency of. STP.  Good. Job. Thanks a lot.

There has been no question as to letting of this treated water for gardening.

Suspicion arose when this was sprayed and come into contact with residence.

The report amply refers to letting this water to inland water surface, and for bathing

Certain more parameters are required.  Especially E. coli  levels.

This water may be disposed by watering as well as discharge to water surface or to

Socking pits for re harvesting water, but not desirable to get in contact with residents.

Even for watering in spite of heavy rains and dilution of nutrients our plants has withered and I have told you in person too much of nutrients are not advisable.

This is what I feel.

Regards

Thanks

Seshadri

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On 15-Feb-2016, at 11:34 PM, Govindan <vgvi...@gmail.com> wrote:

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<Water-Air-Noise Feb 16.pdf>

<tnpcb_standards.pdf>

[seshadri seshadri]

Gentlemen/gentlewomen

Thank you for updating with test reports along TNPCB Standards.

The notice level issues are so far in my opinion from STP area was my understanding.

The permissible notice level indicated as per the table applies to power generators and not from blowers.

It say the area should be enclosed and notice level taken at one meter level.

Notice levels taken from various distances from various places, especially flats with all doors and closed as well fans, tv, audio equipment switched off is not representative.

In my house probably 15 meters away from notice producing source with the above conditions average was 66db.  It cannot be 66db at one meter level.

The booklet PDF states booklet for entrepreneurs and does not cover domestic

Residential notice levels.

Residential notice levels are 55 during day time and 45 during night.

Trust I am right, and would stand corrected.

Regards

Thanks

Seshadri

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On 15-Feb-2016, at 11:34 PM, Govindan <vgvi...@gmail.com> wrote:

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<Water-Air-Noise Feb 16.pdf>

<tnpcb_standards.pdf>

[J SWAMINATHAN]

Dear All,

Appreciation to the all people who spent their personal time and toiled to achieve this result.

My comments are as below.

1. STP - Performing well.

2. Sound level Acceptable. Ambient noise level is 60 dB and running noise is 70 dB. As per TNPCB, it suits both the conditions of 10 dB above normal noise level which is still lower than 75 dB of maximum.

3. The area classification can not be residential. Residential means our home boundary with the defined set back distance. The utility area can always be considered as Industrial since we use industrial equipment.

4. The air quality is in very much acceptable level.

In short, everything is fine and it is not necessary to raise too much of alarm and annoyance.

Regards,

Swaminathan

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From: Govindan <vgvi...@gmail.com>
To: JARA <jar...@googlegroups.com>
Sent: Monday, February 15, 2016 10:03 PM
Subject: STP - Water, Air Quality and Noise level Test Reports

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[seshadri seshadri]

Honourable Members.

Two test report and a PDF file attached has not answered pertinent requests made but tries to outwit the whole issues and tries to convince the members with a wrong data (as  per my knowledge, and I would agree if am wrong and would not linger further)

Regarding noise levels an average has been worked out from different distances after switching off domestic notice of fans, televisions, and closing the doors and windows. Where as I am entailed to my own noise levels. Even  then it shows an average of 66db and permissible is 55 db. If you add up my own notice levels, this would be an alarming figure.  I am sacrificing fresh air, since I have to close my windows.

The Manual attached is a guide line for entrepreneurs and does not apply to domestic permitted noise levels.  The reference or standard is for diesel generator and not for blower.  Noise  level has to be measured as per guide lines one meter level from the closed chamber. Under the circumstances it is not acceptable.

Regarding no one wanted the air quality, but pertinent issue is from gas emanating from STP process.  Even the air quality test is piece meal leaving out many other parameters.

Results are fine when 100 odd times say once in three days tested and a weighted Average arrived it.  Ambient air quality never arrived from the treated/aerated effluent.

This report water as well air have failed to mention other parameters as required and not acceptable.

There could be no change in our requirement as to noise reduction to 55/45 db at one meter level and provision of stack at STP.

It is futile to impress that gas evolves when there is bio methenaisation and aeration process wherein Bactria grows and with the help of air  pumped in reduces COD 

and BOD levels. Air minus oxygen undergoes chemical reaction and comes out as unsuitable gases for human consumption.  It happens continuously for 40 minutes once in twenty minutes.  Reaction is biological and not chemical to expect desired results at desired time. Air quality vary as per ambient air quality and it has to be vented in atmosphere at safe level.

A specific tank has a stack, our own toilets have a stack, our well in front near Alfa has been provided with a stack. Why refuse to provide a stack here.

Nor accepting correct views only show COM. Is obstinate.

As per the suggestion of our member you can notify STP area as industry.

It is okay and fine. 

I need not refer this report to TNPCB SINCE  you would declare it as industry,

And arrange to obtain CONSENT AND RENEW IT YEARLY, PAY WATER CESS, SUBJECT YOURSELF TO ALL FORMALITIES SUCH AS PERIODICAL INSPECTION ETC.

Then

As industry, you would apply and get licence from MUNICIPALITY, FACTORY LICENCE

ELECTRICAL APPROVAL ETC ETC.

It is your domain, but DELTA EAST WILL NOT PARTICIPATE AND PAY THEIR SHARE

THANKS

REGARDS

SESHADRI

 

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[mohanvenkatachari .]

Dear Residents,

I have been reading the trailing mails posted by some members of JARA with concern and was some what worried. I remember, in the last General Body meeting, the issue of construction of stack or enhancing the ventilation at the STP area were discussed and the idea of construction of stack was in principle agreed upon and also was minuted, That being the case, why again and again this issue is to be kept under debate is not clear. Majority of JARA members do not have any objection in having a stack for the STP- keeping aside the correctness of the Test Reports. The issue is not only technical but also psychological.
 Comparing different sets of living conditions ( slum or railway stations etc with that of living in our apartment may score some points but would not be congenial to harmony and good relationship among the residents ).

Many of the readers of these mails might have felt  that scholastic exposition of information and airing of views should not go down to a level of 'I win- you lose' type of situation. What JARA wants at the end of the day, is 'All-of-us-Win' type situation.   

I make an earnest appeal to the COM- which is very efficient and dynamic in resolving the problems- to break its silence and come out with some action plan of constructing a stack ( towards implementing the last GB decision) at the earliest and help close the whole issue.

With warm regards and best wishes,

V.Mohan, 54, Beta

On Thu, Feb 18, 2016 at 1:32 PM, seshadri seshadri <indiras...@hotmail.com> wrote:

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Honourable Members.

Two test report and a PDF file attached has not answered pertinent requests made but tries to outwit the whole issues and tries to convince the members with a wrong data (as  per my knowledge, and I would agree if am wrong and would not linger further)

Regarding noise levels an average has been worked out from different distances after switching off domestic notice of fans, televisions, and closing the doors and windows. Where as I am entailed to my own noise levels. Even  then it shows an average of 66db and permissible is 55 db. If you add up my own notice levels, this would be an alarming figure.  I am sacrificing fresh air, since I have to close my windows.

The Manual attached is a guide line for entrepreneurs and does not apply to domestic permitted noise levels.  The reference or standard is for diesel generator and not for blower.  Noise  level has to be measured as per guide lines one meter level from the closed chamber. Under the circumstances it is not acceptable.

Regarding no one wanted the air quality, but pertinent issue is from gas emanating from STP process.  Even the air quality test is piece meal leaving out many other parameters.

Results are fine when 100 odd times say once in three days tested and a weighted Average arrived it.  Ambient air quality never arrived from the treated/aerated effluent.

This report water as well air have failed to mention other parameters as required and not acceptable.

There could be no change in our requirement as to noise reduction to 55/45 db at one meter level and provision of stack at STP.

It is futile to impress that gas evolves when there is bio methenaisation and aeration process wherein Bactria grows and with the help of air  pumped in reduces COD 

and BOD levels. Air minus oxygen undergoes chemical reaction and comes out as unsuitable gases for human consumption.  It happens continuously for 40 minutes once in twenty minutes.  Reaction is biological and not chemical to expect desired results at desired time. Air quality vary as per ambient air quality and it has to be vented in atmosphere at safe level.

A specific tank has a stack, our own toilets have a stack, our well in front near Alfa has been provided with a stack. Why refuse to provide a stack here.

Nor accepting correct views only show COM. Is obstinate.

As per the suggestion of our member you can notify STP area as industry.

It is okay and fine. 

I need not refer this report to TNPCB SINCE  you would declare it as industry,

And arrange to obtain CONSENT AND RENEW IT YEARLY, PAY WATER CESS, SUBJECT YOURSELF TO ALL FORMALITIES SUCH AS PERIODICAL INSPECTION ETC.

Then

As industry, you would apply and get licence from MUNICIPALITY, FACTORY LICENCE

ELECTRICAL APPROVAL ETC ETC.

It is your domain, but DELTA EAST WILL NOT PARTICIPATE AND PAY THEIR SHARE

THANKS

REGARDS

SESHADRI

 

Sent from my iPad

On 16-Feb-2016, at 4:17 PM, seshadri seshadri <indiras...@hotmail.com> wrote:

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[Govindan]

I may like to clarify the following in regard to noise - 

While calculating noise levels, two measurements are essential. One the latent ambience - noise when the concerned equipment is not operated -  and ambience after the equipment is switched on. This is what reflected in the respective data as 'before' and 'after'. 

The actual additional noise generated by the equipment is - ambience (switched on) minus latent ambience (switched off).

 

As per data, during day time, the ambient (latent) noise is well above the prescribed level of 55 dbA. Therefore, it may not be proper to insist that the ambience (after the equipment is switched on) should not exceed 55 dbA. 

During night time, the ambient (latent) noise is just around 45 dbA. When the equipment is switched on the noise level is exceeding this level. 

Hypothetically, even if total noise control for the equipment is made, the ambience (latent) is bound to remain at 45 dbA during night and 60 dbA during day time. 

The equipment generates additional 10 dbA during day time; and 22 dbA during night. The extra 12 dbA is due to 15 dbA drop in latent ambience during night time. 

It is therefore, a matter of opinion, whether sound proofing of the blower is indeed a solution, taking into account the latent noise levels both during day and night. 

[seshadri seshadri]

Honourable members

Regarding noise level switched off and switched on, noise level was taken when the 

equipment was running switching off household equipments in my house and it averaged 66db.  Night time it was not taken.

Noise level is not constant during day or night and this equipment creates various types of noise screening, hammering etc., and has to be corrected.

This is what my opinion.  Even as per report provided it exceeded the limits for residential areas.

Thanks

Regards

Seshadri

Sent from my iPad

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[alamelu viswanathan]

Dear Sir,

Tks for your effort taking for the reduction in the noise of the STP at our premises.

Sir, in the night small motor is running that sound is some how tolerable at the moment. but during day time big motor sound is not at all tolerable. whether shall we do the following pl. suggest which is viable.

1. shall we cut the compound wall by 2x2 or 3x3 and put the grill and close the three sides upto 5 to 6ft level with top opening.

of the motor shed.

2. three sides with sheet covering (honeycomb brick work format)

3. sound proof sheets to be fixed

for all the above work wherever possible exhaust fan to be fixed.

4. last option to change the big motor into a small motor

it is nothing but a suggestion any other suggestion pl. welcome.

kindly do something to arrest the noise and also pl. try to come out with any solution. but I need solution desperately. I am sorry to say that the sound during holiday on day time is absolutely intolerable.

tks

w/r

murali

delta 90

9444101632

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