In Gothenburg's waste treatment plant, Rickard discovered a silver lining in the cloudy waters.
Rickard believes that more study is required and there could be concerns for human health.
New Zealand's Glenn Snyders and Australia's Brenton Rickard tied for second place with England's Daniel Sliwinski seventh.
Since that Canada Cup tournament Rickard has scored more than 30 Test tries in an outstanding career.
Rickard won her record 104th cap in Wales' 31-10 win over Scotland in the 2009 Six Nations.
The cost doesn't bother Sally, Mr. Rickard's Transylvanian hound, who likes being rid of all the excess hair.
In the process Rickard, 38, helped Wales Women to the most successful season in their history in Europe.
Swedish researcher Rickard Arvidsson felt that these experiments were essentially missing a trick.
Brenton Rickard, Australia's 100m breaststroke world champion, looked strangely off the pace as he narrowly crept through his semi-final.
BBC: First Commonwealth Games golds for England and Scotland
Rickard has now set her sights on being part of Wales' challenge at the 2010 World Cup in England.
Working under the alias of Alex Gordon, William Rickard was employed just two years after being released from Broadmoor Mental Hospital.
Van der Burgh also broke a mark set at the 2009 championships in Rome, shaving Australian Brenton Rickard's old mark of 58.58 seconds.
The tool has become standard hardware for grooming professionals, says Ben Rickard, owner of the Dog Spot, a canine boarding house in Boulder, Colo.
Nationally, asthma deaths have eased recently, even as use of long-acting beta agonists has risen, Rickard notes, inconsistent with an epidemic of drug-induced deaths.
Holders and favourites New Zealand, plus rival southern hemisphere powers Australia and South Africa await Rickard and her Wales team-mates in the pool stages.
Rickard now plays for local team Woodbridge Amazons in Suffolk, East Anglia, while the biology and physical education teacher is also a keen hockey player.
"The future lies with large-scale 'super dairy' farms, " said Mr Rickard.
BBC: East of England farmers could be hit by 'super dairies'
In his study, Rickard found that the amount of metal in the sludge depended on the concentration in the clothing - and this varied hugely.
Rickard qualified seventh-fastest for the final, with Scottish duo Michael Jamieson and Kris Gilchrist through in fourth and sixth respectively, and Daniel Sliwinski of England rounding off the qualifiers in eighth.
BBC: First Commonwealth Games golds for England and Scotland
In the GT1 category, Aston Martin returned to the winner's podium, courtesy of David Brabham - son of legendary Aussie racer Sir Jack - Briton, Darren Turner, and Swede Rickard Rydell.
For Warrington-born Rickard, however, the year was also hugely significant as she bettered the 103-cap mark set by ex-Wales captain Gareth Thomas in the men's game, whose tally included three British and Irish Lions appearances.
Louise Rickard, with 110 caps behind her at wing and full-back, is on the bench as second row cover while uncapped number eight Vici Owens and centre Adi Taviner make their first appearance on the bench.
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