Per table 2 in the article you cited, the recommendations are:

• 5-9 ug/dL: minimize exposure, consider removal from exposure for pregnancy
• 10-19 ug/dL: decrease exposure, remove from exposure for pregnancy
• 20-29 ug/dL: remove from exposure if level remains >20 in 4 weeks.

Remediation measures get progressively more drastic after that.

Spez: here's a direct link to the table:

https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5379568/table/Tab2/

Per table 2 in the article you cited, the recommendations are:

• 5-9 ug/dL: minimize exposure, consider removal from exposure for pregnancy
• 10-19 ug/dL: decrease exposure, remove from exposure for pregnancy
• 20-29 ug/dL: remove from exposure if level remains >20 in 4 weeks.

Remediation measures get progressively more drastic after that.