Suchergebnisse

This guideline has been produced to assist the management of contaminated sites in Latvia, in particular disused Russian military sites. A risk-based approach is proposed for adoption in the assessment of such sites in line with the approach adopted in recent years by other countries in the European Union. Some countries have set fixed numerical criteria to assess contaminated land based on generic assumptions on site conditions such as; soil type, depth to groundwater, geology and hydrogeology, and proximity to potential receptors (eg. groundwater supply well, surface water body). Such an approach ignores the fact that contaminated sites vary widely in terms of both complexity and the potential risk they may pose to either human health or the environment. As fixed numerical criteria are nearly always set at very low levels, their use leads to the clean-up of more land than may be necessary. The result is wastage of resources with clean-up costs incurred without an incremental reduction in risk to human health and the environment. ; 45568

Frie emneord: Olje \" \" : Tungmetaller A former Soviet military armoured vehicle workshop has been subject to site investigation to examine soil and groundwater contamination. Site investiga- tions have indicated that groundwater is contaminated by hydrocarbons, free phase LNAPL oil being found in one of the boreholes (borehole 3 beneath the scrapyard). Soils at the site are contamonated by oil and the heavy metals, Pb, Cu, Zn and Cd. Risk assessment techniques have been applied to make a so-called \"Tier2\" assessment of risk to human health and risk to water resources. The asessment has concluded that contamination from the site will not reach the River Daugava within 39 years, even without taking into account sorption and biodegradation. The risk assessment concludes that the site can remain in its current usage or be redeveloped for commercial purposes without any risk to human health. The assessment predicts no unacceptable risk to off-site groundwater resour- ces (well in Quaternary aquifer at 200 m distance or bore in Devonian at 500 m distance) or to the River Daugava from the site. If the site id redeveloped for residential use or for open public access (parkland), an unacceptable human health risk may be present. If suck redevel- opment is proposed, either (a) a \"Tier 3\" risk assessment should be carried out to make a more refined, less conservative assessment of risk or (b) cleanup of selected areas shoould be carried out to cited risk-based clean-up levels. ; 45572

Frie emneord: Olje A former Soviet military fuel depot has been subject to site investigation to examine soil and groundwater contamination. Risk assessment techniques have been applied to make a so-called \"Tier 2\" assessment of risk to human health and risk to water resourced from the site. The assessment has consluded that contamination from the site will not reach the nearest surface water body within 35 years, even without taking into account sorption and biodegradation. The risk assessment also concludes that the site can remain in its current usage or be redeveloped for commercial purposes without any risk to human health. The assessment predicts no unacceptable risk to groundwater resources or to the River Daugava from the site. If the site is redeveloped for residential use or for open public access (parkland), an unacceptable human health risk may be present. If such redevel- opment is proposed, either (a) a \"Tier3\" risk assessment should be carried out to make a more refined, less conservative assessment of risk or (b) cleanup of selected areas should be carried out to cited risk-based clean-up levels. ; 45569

Frie emneord: Olje \" \" : Tungmetaller A former Soviet military armoured vehicle workshop has been subject to site investigation to examine soil and groundwater contamination. Site investiga- tions have indicated that groundwater is contaminated by hydrocarbons, free phase LNAPL oil being found in one of the boreholes (borehole 3 beneath the scrapyard). Soils at the site are contamonated by oil and the heavy metals, Pb, Cu, Zn and Cd. Risk assessment techniques have been applied to make a so-called \"Tier2\" assessment of risk to human health and risk to water resources. The asessment has concluded that contamination from the site will not reach the River Daugava within 39 years, even without taking into account sorption and biodegradation. The risk assessment concludes that the site can remain in its current usage or be redeveloped for commercial purposes without any risk to human health. The assessment predicts no unacceptable risk to off-site groundwater resour- ces (well in Quaternary aquifer at 200 m distance or bore in Devonian at 500 m distance) or to the River Daugava from the site. If the site id redeveloped for residential use or for open public access (parkland), an unacceptable human health risk may be present. If suck redevel- opment is proposed, either (a) a \"Tier 3\" risk assessment should be carried out to make a more refined, less conservative assessment of risk or (b) cleanup of selected areas shoould be carried out to cited risk-based clean-up levels. ; 45571

Frie emneord: Olje A former Soviet military fuel depot has been subject to site investigation to examine soil and groundwater contamination. Risk assessment techniques have been applied to make a so-called \"Tier 2\" assessment of risk to human health and risk to water resourced from the site. The assessment has consluded that contamination from the site will not reach the nearest surface water body within 35 years, even without taking into account sorption and biodegradation. The risk assessment also concludes that the site can remain in its current usage or be redeveloped for commercial purposes without any risk to human health. The assessment predicts no unacceptable risk to groundwater resources or to the River Daugava from the site. If the site is redeveloped for residential use or for open public access (parkland), an unacceptable human health risk may be present. If such redevel- opment is proposed, either (a) a \"Tier3\" risk assessment should be carried out to make a more refined, less conservative assessment of risk or (b) cleanup of selected areas should be carried out to cited risk-based clean-up levels. ; 45570