Difference between Mudjacking and Polyurethane Concrete Raising. Also called foam lifting, polyurethane for concrete raising has been in practice for about 20 years. However, the price of the equipment and polyurethane material made it way too expensive for private contractors to adopt and replace traditional mudjacking.
Farmed salmon available in Washington state markets is produced in Washington State, Canada, Maine, or Chile. Studies on salmon from these sources have shown low levels of organic contaminants in the fish.
If the salmon is farmed, it is not an issue. If it is wild salmon, the fish live much longer and get much larger (and by consequence have far more stored mercury within their fat/flesh). Farmed salmon are raised and killed long before they amass a worrisome amount of mercury. Also, it depends on your gender.