Lead is also used in ceramic glazes and as a stabilizer in plastics. Lead was used extensively as a corrosion inhibitor and pigment in paints but concerns over its toxicity led to the CPSC in 1977 to ban the use of lead in paint for residential and public buildings.
The first digit assigned to all Visa cards is four, and the second through sixth numbers are connected to the financial institution. Then, either the seventh through 12th numbers, or the seventh through 15th, are the account number, while that final 13th or 16th digit is the check number.
For each H1B visa application, the USCIS assigns a unique 13 digit alphanumeric number. There are 4 USCIS service centers to handle H1B applications. The first 3 character of your receipt signifies the particular service center, where the application is being processed. They can be any one of WAC, EAC, SRC, and LIN.