Query for work items in just one ProjectArea

I have code to query for work items in a particular project area, but it's returning work items in ALL the project areas in the repository (or maybe it's in my workspace--for now those are the same). The method takes the IProjectArea as a parameter, so I'm surprised that it doesn't limit the results to that project. What's the right code to get just the work items in a single project?

Here's my current code. The important line (I think) is the last line just before the return that does the query and passes the IProjectArea:

private IQueryResult<IResolvedResult<IWorkItem>> findWorkItemsByType(ITeamRepository repo,
IProjectArea project,
String typeName,
ItemProfile<IWorkItem> theProfile)
throws TeamRepositoryException {
//get needed libraries
IQueryClient queryClient = (IQueryClient) repo.getClientLibrary(IQueryClient.class);
IAuditableClient auditableClient = (IAuditableClient) repo.getClientLibrary(IAuditableClient.class);
IQueryableAttributeFactory attFactory = QueryableAttributes.getFactory(IWorkItem.ITEM_TYPE);
IQueryableAttribute typeAttribute =
attFactory.findAttribute(project, IWorkItem.TYPE_PROPERTY, auditableClient, null);
Expression expression= new AttributeExpression(typeAttribute, AttributeOperation.EQUALS, typeName);
IQueryResult<IResolvedResult<IWorkItem>> result = queryClient.getResolvedExpressionResults(project,
expression, theProfile);
return result;
}