The lead is 3 times the limit for drinking water. Certainly higher than it should be, but it doesn't sound astonishingly toxic since the EPA is pretty cautious in its limits for most things (except regarding Fluoride).

Edit: Actually 42ppb would be 42 micrograms per kg of product. If you had high absorption of that you could get toxicity by binge-ing on them since you only need a few micro grams per dL for toxic symptoms.

Though absorption is the big question. Metals like Aluminum can be naturally occurring in food and have low absorption. That may or may not be the case for lead.