SuSanA - Forum Kunena Site Syndication http://forum.susana.org/ Thu, 05 Mar 2015 04:04:32 +0000 Kunena 1.6 http://forum.susana.org/components/com_kunena/template/default/images/icons/rss.png SuSanA - Forum http://forum.susana.org/ en-gb Re: Final version of the checklist on safer siting of sanitation systems - by: muench http://forum.susana.org/forum/categories/64-wg-11-groundwater/11902-final-version-of-the-checklist-on-safer-siting-of-sanitation-systems#11938 http://forum.susana.org/forum/categories/64-wg-11-groundwater/11902-final-version-of-the-checklist-on-safer-siting-of-sanitation-systems#11938 ]]> WG 11 (Groundwater) Sat, 07 Feb 2015 10:43:56 +0000 Re: Final version of the checklist on safer siting of sanitation systems - by: kanalwolf http://forum.susana.org/forum/categories/64-wg-11-groundwater/11902-final-version-of-the-checklist-on-safer-siting-of-sanitation-systems#11933 http://forum.susana.org/forum/categories/64-wg-11-groundwater/11902-final-version-of-the-checklist-on-safer-siting-of-sanitation-systems#11933
thank you for asking. The download link just worked out fine for me.
Nevertheless I attach the document also to this post.

I hope this works, anyone who has a major problem, please let us know-

Kind regards
Leif wolf]]>
WG 11 (Groundwater) Fri, 06 Feb 2015 21:47:53 +0000
Re: Final version of the checklist on safer siting of sanitation systems - by: fppirco http://forum.susana.org/forum/categories/64-wg-11-groundwater/11902-final-version-of-the-checklist-on-safer-siting-of-sanitation-systems#11930 http://forum.susana.org/forum/categories/64-wg-11-groundwater/11902-final-version-of-the-checklist-on-safer-siting-of-sanitation-systems#11930
Thanks for information I have downloaded link but in message and it title talk about checklist I could not opened check list I also have sent this message for Andrea but I have not received any respond.

Thank you for your kindly attention.

Mohammad Mojtabaei
www.fpp.ir]]>
WG 11 (Groundwater) Fri, 06 Feb 2015 18:50:16 +0000
Re: Final version of the checklist on safer siting of sanitation systems - by: kanalwolf http://forum.susana.org/forum/categories/64-wg-11-groundwater/11902-final-version-of-the-checklist-on-safer-siting-of-sanitation-systems#11905 http://forum.susana.org/forum/categories/64-wg-11-groundwater/11902-final-version-of-the-checklist-on-safer-siting-of-sanitation-systems#11905
Without BGR, all my hand made drawings would still be unreadable and without Andrea´s input, steady follow up and constant drive, the idea would probably never turned into a publication.


Kind regards,
Leif]]>
WG 11 (Groundwater) Thu, 05 Feb 2015 15:08:53 +0000
Re: Safer siting of sanitation systems: An introduction to criteria for risk reduction to groundwater quality - by: andreanick http://forum.susana.org/forum/categories/64-wg-11-groundwater/9843-safer-siting-of-sanitation-systems-an-introduction-to-criteria-for-risk-reduction-to-groundwater-quality#11903 http://forum.susana.org/forum/categories/64-wg-11-groundwater/9843-safer-siting-of-sanitation-systems-an-introduction-to-criteria-for-risk-reduction-to-groundwater-quality#11903
the final version is now in the library as announced in this new thread:

forum.susana.org/forum/categories/64-wg-...f-sanitation-systems

You are welcome to use the new thread for you comments.

Thanks,
Andrea]]>
WG 11 (Groundwater) Thu, 05 Feb 2015 14:13:39 +0000
Final version of the checklist on safer siting of sanitation systems - by: andreanick http://forum.susana.org/forum/categories/64-wg-11-groundwater/11902-final-version-of-the-checklist-on-safer-siting-of-sanitation-systems#11902 http://forum.susana.org/forum/categories/64-wg-11-groundwater/11902-final-version-of-the-checklist-on-safer-siting-of-sanitation-systems#11902
with a big hand to Leif Wolf and Aidan Cronin and all reviewers, I'd like to present to you the latest publication of this working group:

How to keep your groundwater drinkable. Safer siting of sanitation systems

It is available from the Susana library for downloads:
www.susana.org/en/resources/library/details/2155


The checklist is meant to give an insight to planners and implementors in how far sanitation siting is more than separation distance.

Your comments are welcome; I would be most interested in where and how you use this document in your work and how useful you will find it.

Best regards,
Andrea

+++++++
A discussion about earlier drafts of this document took place here on the forum.]]>
WG 11 (Groundwater) Thu, 05 Feb 2015 11:12:25 +0000
Re: Safer siting of sanitation systems : An introduction to criteria for risk reduction to groundwater quality - by: andreanick http://forum.susana.org/forum/categories/64-wg-11-groundwater/9843-safer-siting-of-sanitation-systems-an-introduction-to-criteria-for-risk-reduction-to-groundwater-quality#11875 http://forum.susana.org/forum/categories/64-wg-11-groundwater/9843-safer-siting-of-sanitation-systems-an-introduction-to-criteria-for-risk-reduction-to-groundwater-quality#11875
thanks a lot for taking part in this discussion and for your valuable input and references.

In our checklist which will be posted here tomorrow we direct he readers who are keen on knowing more about the topic to the Graham et al publication you have also linked to your post. Also we ask them to consider reading the ARGOSS manual and report by the British Geological Survey which is I think the standard on the onsite sanitation and groundwater protection issue at the moment.

I agree with you that pedestals are an important thing when talking about keping you wellwater safe. We have built in a figure on wellhead construction and sealing of annular space, but the pedestal might not be coming out as you wish. We will keep this in mind for a future version.

We have to make compromises between overall length of the document, depth of knowledge expected of the reader and mass of information that could be included.

So thank you again for the comments and be sure we thought about each of them.

All the best
Andrea]]>
WG 11 (Groundwater) Tue, 03 Feb 2015 15:20:01 +0000
Re: Safer siting of sanitation systems : An introduction to criteria for risk reduction to groundwater quality - by: F H Mughal http://forum.susana.org/forum/categories/64-wg-11-groundwater/9843-safer-siting-of-sanitation-systems-an-introduction-to-criteria-for-risk-reduction-to-groundwater-quality#11753 http://forum.susana.org/forum/categories/64-wg-11-groundwater/9843-safer-siting-of-sanitation-systems-an-introduction-to-criteria-for-risk-reduction-to-groundwater-quality#11753
Attached is 1984 publication of the World Bank titled “Manual on the Design, Construction and Maintenance of Low-Cost Pour-Flush Waterseal Latrines in India.” Please see section 2.4.4 on Distance between 2 pits (pp. 7); section 2.4.8 on Water pollution aspects (pp. 8 ) and; Table 4 on pp. 10.

I think, the distances must be highlighted, when there is level difference, e,g., when latrine is uphill and a water well is downhill; and vice versa.

A paper on “Pit Latrines and Their Impacts on Groundwater Quality: A Systematic Review, by Jay P. Graham and Matthew L. Polizzotto,” (also attached), draws attention to nitrate, chloride and ammonia
(chemical contamination), as major contaminants of groundwater from latrines, due to their higher concentrations in excreta.

Whenever, I’m on a topic, like the one you have initiated, I’m always reminded of the proper platform for the handpumps on wells. Please highlight this briefly, as well. A RWSN publication on Platform Design is attached.

Smiles,

F H Mughal]]>
WG 11 (Groundwater) Sun, 25 Jan 2015 06:17:16 +0000
Re: Safer siting of sanitation systems : An introduction to criteria for risk reduction to groundwater quality - by: kanalwolf http://forum.susana.org/forum/categories/64-wg-11-groundwater/9843-safer-siting-of-sanitation-systems-an-introduction-to-criteria-for-risk-reduction-to-groundwater-quality#11727 http://forum.susana.org/forum/categories/64-wg-11-groundwater/9843-safer-siting-of-sanitation-systems-an-introduction-to-criteria-for-risk-reduction-to-groundwater-quality#11727 Thank you again for the helpful suggestions from the forum.
It was very quiet in this post because it took us some time to respond to feedback and also we added some subchapters.

Please see the final draft attached to this post. It is currently also for review with the SuSana core group.
If you have minor comments, please let us know before 30th of January and we will try to take them on board in this 2015 version before we publish it. Major suggestions however will be collected for the process of composing the next edition (probably in 2016)

Kind regards,
Leif]]>
WG 11 (Groundwater) Thu, 22 Jan 2015 16:17:34 +0000
Re: Safer siting of sanitation systems : An introduction to criteria for risk reduction to groundwater quality - by: kanalwolf http://forum.susana.org/forum/categories/64-wg-11-groundwater/9843-safer-siting-of-sanitation-systems-an-introduction-to-criteria-for-risk-reduction-to-groundwater-quality#10668 http://forum.susana.org/forum/categories/64-wg-11-groundwater/9843-safer-siting-of-sanitation-systems-an-introduction-to-criteria-for-risk-reduction-to-groundwater-quality#10668
Many thanks for the feedback and good suggestions to Kris, Christian and Percival.

I agree that it could be valuable to provide a bit more examples on separation distances.
However, I think that we need to make clear also to non-professionals that the idea of having a uniform separation distance for an entire country is most likely not the best approach.

E.g. even 50 m lateral separation distance migth not be sufficient in a strongly karstified system with a downgradient supply well or spring, while 10 m lateral separation distance is completely sufficient if there is a well developed clay cover layer and the annular space of the well is nicely sealed.

Ok. let me dream a little bit:
Possibly the best approach (if there is enough expertise available) would be to develop for each district or urban area an intitial water safety plan which 1) maps major and minor groundwater uses for drinking water 2) displays broad groundwater flow directions 3) maps the groundwater vulnerability based on criteria like karstification or vadose zone thickness / composition 4) maps high and low risk areas with corresponding minimum lateral separation distance regulations and 5)identifies the ability of residents to implement the recommended separation distances.

As for the checklist document, I will try to include
- more information on example separation distances,
- an explanation why it is completely sensible that so many separation distances were defined by different people ( in gross simplification of the real complexity of the problem)
- a simplified version of the table which Kris extracted.

Would this address your points?

Cheers,
Leif]]>
WG 11 (Groundwater) Thu, 23 Oct 2014 21:48:56 +0000
Re: WaSH case study Yaoundé / Cameroon (fr) - Pilot Study on Groundwater Quality and Health in Yaoundé - by: epesshydro1 http://forum.susana.org/forum/categories/64-wg-11-groundwater/9984-wash-case-study-yaounde--cameroon-fr-pilot-study-on-groundwater-quality-and-health-in-yaounde#10224 http://forum.susana.org/forum/categories/64-wg-11-groundwater/9984-wash-case-study-yaounde--cameroon-fr-pilot-study-on-groundwater-quality-and-health-in-yaounde#10224
www.bgr.bund.de/cameroon-epess

Best regards,]]>
WG 11 (Groundwater) Thu, 18 Sep 2014 20:42:09 +0000
Re: Safer siting of sanitation systems : An introduction to criteria for risk reduction to groundwater quality - by: christoph http://forum.susana.org/forum/categories/64-wg-11-groundwater/9843-safer-siting-of-sanitation-systems-an-introduction-to-criteria-for-risk-reduction-to-groundwater-quality#10222 http://forum.susana.org/forum/categories/64-wg-11-groundwater/9843-safer-siting-of-sanitation-systems-an-introduction-to-criteria-for-risk-reduction-to-groundwater-quality#10222 I thought of something like the Table 8.2 in the document you posted. To explain with a bit more imagination possibility for distances the problem.


Nothing sientific for all cases.
Christoph]]>
WG 11 (Groundwater) Thu, 18 Sep 2014 16:15:00 +0000
Re: Safer siting of sanitation systems : An introduction to criteria for risk reduction to groundwater quality - by: JKMakowka http://forum.susana.org/forum/categories/64-wg-11-groundwater/9843-safer-siting-of-sanitation-systems-an-introduction-to-criteria-for-risk-reduction-to-groundwater-quality#10219 http://forum.susana.org/forum/categories/64-wg-11-groundwater/9843-safer-siting-of-sanitation-systems-an-introduction-to-criteria-for-risk-reduction-to-groundwater-quality#10219 WG 11 (Groundwater) Thu, 18 Sep 2014 12:37:18 +0000 Re: Safer siting of sanitation systems : An introduction to criteria for risk reduction to groundwater quality - by: christoph http://forum.susana.org/forum/categories/64-wg-11-groundwater/9843-safer-siting-of-sanitation-systems-an-introduction-to-criteria-for-risk-reduction-to-groundwater-quality#10217 http://forum.susana.org/forum/categories/64-wg-11-groundwater/9843-safer-siting-of-sanitation-systems-an-introduction-to-criteria-for-risk-reduction-to-groundwater-quality#10217 the document is nice and clear in its layout, explaining the problem in a clear manner to nonprofessionals. I get the impression that it is meant for nonprofessionals.
But especially nonprofessionals would need examples. Explaining "what is close and what is far" in reality. In the document is mentioned 10 m as close (as it is so close that in all situations it is close) and 1000 m as far (so far that it will never be relevant).

Any quantitative information on separation distances provided within this document are general examples only. For application to your site or setting, it is strongly recommended to consult groundwater professionals to elaborate specific guidelines which are adapted to the regional setting.

The second zone is delineated at the line from which groundwater travels 50 days until it reaches the production well or spring.

I think you should include examples as: a 50 day line in sandy soils is about ...m whereas in loamy soils it is ... and it can go up to xxx m in fractured rock. Just to make clear for a non professional how extreme the difference could be.
How many people in areas with household wells have a groundwater professionals to elaborate specific guidelines .... so they need orientation to understand the reason the distance varies between "between 12 to 75 m between pit latrine and groundwater wells" in guidelines.

Regards
Christoph]]>
WG 11 (Groundwater) Thu, 18 Sep 2014 09:57:29 +0000
Safer siting of sanitation systems : An introduction to criteria for risk reduction to groundwater quality - by: prthomas http://forum.susana.org/forum/categories/64-wg-11-groundwater/9843-safer-siting-of-sanitation-systems-an-introduction-to-criteria-for-risk-reduction-to-groundwater-quality#10210 http://forum.susana.org/forum/categories/64-wg-11-groundwater/9843-safer-siting-of-sanitation-systems-an-introduction-to-criteria-for-risk-reduction-to-groundwater-quality#10210
This is an excellent document for public education on siting of septic systems. In Ontario Canada we have number of municipal wells and it has been legislated here 4 zones around a municipal well.

• Wellhead Protection Area WHPA-A : 100 m Radius
• Wellhead Protection Area WHPA-B : 2-Year time of travel
• Wellhead Protection Area WHPA-C : 10-Year time of travel
• Wellhead Protection Area WHPA-D : 25-year time of travel.

Also, there are septic re-inspection programs to check the septic systems within these time of travel.

You might have heard that Ontario has stewardship grants to owners of septic tanks located in the Wellhead Protection Areas for retrofits/rehabilitation. Also there mandatory septic tanks inspection programs as well.

Thanks and Best Wishes.

Percival


Percival R. Thomas, PhD, P.Eng.
Manager of Water/Wastewater Systems
City of Orillia
Environmental Services - Engineering
50 Andrew Street South, Suite 300
Orillia, Ontario L3V 7T5]]>
WG 11 (Groundwater) Wed, 17 Sep 2014 14:02:02 +0000