Deelsaneringsplan bij rioolvervanging Ben Elsendoorn gemeente Den Haag
Algemene aspecten • • • •
1500 km riolering in Den Haag 15 km rioolvervanging per jaar 250 km riool ouder 80 jaar (per 2010) Centrum Den Haag veel locaties ernstige gevallen van grondwaterverontreining
Centrum Den Haag
Case: Hugo de Grootstraat Afweging deelsanering • Definitie deelsanering grondwater • Omvang grondwaterverontreiniging • Type verontreiniging (VOCl, olie, etc)
Omvang VOCl vlek tpv Hugo de Grootstraat
Case: Hugo de Grootstraat Afweging deelsanering
• Diepte verontreiniging • Alternatieven rioolvervanging (relining of uitstel tot sanering gereed)
Geohydrologische opbouw en diepte verontreiniging
Case: Hugo de Grootstraat
• In welk traject is een deelsanering bij rioolvervanging werkelijk nodig
• Locaties monitoringspeilbuizen • Aantal peilbuizen
Locaties monitoringspeilbuizen
Grondwatermonitoringsprogramma deelsanering Hugo de Grootstraat • 2 monitoringspeilbuizen tussen spiegelput en bemaling • bemonstering voor de start van de deelsanering (ivm vaststellen nulsituatie) • daarna wekelijks peilbuizen en spiegelput (effluent) bemonsteren • 1 maand na afloop saneringsbemaling nogmaals bemonstering • analyses Vinylchloride (VC), Cis-1,2dichlooretheen (Cis)
Afronding deelsanering Hugo de Grootstraat • • • •
Evaluatie eindsituatie Opname nieuwe situatie grondwater Controle chemische gehalten effluent Vaststellen gehalten in peilbuizen
Meetresultaten pompput sanering Hugo de Grootstraat
Eindresultaat deelsanering Hugo de Grootstraat • Deelsanering met MKB volgens BRL 6000 en aannemer uitvoering conform BRL 7000 • Deelsanering is volgens plan uitgevoerd • Voor bemaling 10 % minder grondwater onttrokken • Voor tegenbemaling 15 % meer grondwater onttrokken • Ligging S-contour VOCl-vlek niet veranderd • Geringe vracht VOCl uit grondwater verwijderd • Riolering nabij ernstige verontreiniging is vervangen
Deelsaneringsplan bij rioolvervanging-Ingenieursbureau Den Haag.pdf
Omvang VOCl vlek tpv. Hugo de Grootstraat. Page 5 of 24. Deelsaneringsplan bij rioolvervanging-Ingenieursbureau Den Haag.pdf. Deelsaneringsplan bij ...
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