Read the fine print at the bottom labeled "Right to a Hearing". It tells you exactly what to put in the request and where to send it. The hearing must be requested within 10 calendar days, NOT business days. If the request is even 1 minute late, the DLD will not give the person a hearing and will suspend or revoke the license.
Attend the Hearing
Go to the hearing. If the officer does not show up or call in, the license is saved (at least until the criminal case is resolved). The hearing must be set by the DLD within 29 days of the arrest. The hearing can be held in person or via telephone if arrangements are made beforehand.
Question the Officer
Question every aspect of the officer's case. Point out the reasons that the breath machine result was wrong, the reasons why the officer's observations were wrong, and why you were not a drunk driver that night.
DLD will not give you a decision on the day of the hearing. It will come in the mail approximately 10 days after the hearing. If the decision was to suspend/revoke, then you have the option to appeal the case to a district court if the appeal is filed within 30 days of the decision from the DLD.