You need to adjust the grade levels where indicated on the lot grading letter. You can call 780-849-8004 for an explanation, or inquire in person at the Town of Slave Lake Office (Located at 10 Main Street S.W.) or refer to the Guide to Lot Grading handbook.
Some repairs may be as simple as adding some topsoil to a low area, or as complex as removing sod and lowering the soil to repair a high area.
You may also wish to consult a lot grading specialist.