2.2. Sample collection
Four seawater samples were collected from a location near
the Hawaiian Islands. The latter have been used to train military
personnel for air and sea attacks, as well as for marine
landings over a period extending from 1941 to 1990. Samples
UXO-1 and UXO-3 were collected from WWII-ERA UXO
disposal sites, sample UXO-5 was collected at a subsurface
detonation site and sample UXO-7 came from a reference site
with no ordnance field nearby.At each labeled site,waterwas
collected about 0.5m below the surface, in polyethylene 4-L
bottles. Samples were immediately transferred into 1-L amber
glass bottles containing 1.5 g of sodium bisulphate for
acidification. At the end of the 6.5-h campaign, all samples
were immediately placed on ice in a commercial cooler and
processed for shipping. Upon arrival at BRI-CNRC (MontrealMontreal,
Que.), samples were immediately stored at 4 .C, and
analyzed 3 days later.