Below is the list of tables from the database along with their columns and datatype. Need to generate an accurate SQL query for the question.
Only use the columns present in the respective table. Only use the columns which are required to generate the SQL query. Only use table joins if required and not otherwise.

### Tables ###
TABLE: CREATE TABLE table_55866 ( "CERCLIS ID" text, "Name" text, "County" text, "Proposed" text, "Listed" text, "Construction completed" text, "Partially deleted" text, "Deleted" text )

### Question ###
What was the Proposed date of the entry that has a CERCLIS ID of al0001058056?

### Accurate SQL ###

SELECT "Proposed" FROM table_55866 WHERE "CERCLIS ID" = 'al0001058056'