Code To Exclude Records In A Crosstab

Using MS ACCESS I have:

TRANSFORM Avg(SAP_CALD.[CASE_DAYS]) AS AvgOfCASE_DAYS
SELECT SAP_CALD.[OPN_YEAR], SAP_CALD.[CLD_MONTH], Avg(SAP_CALD.[CASE_DAYS]) AS [Total Of CASE_DAYS]
FROM SAP_CALD
GROUP BY SAP_CALD.[OPN_YEAR], SAP_CALD.[CLD_MONTH]
PIVOT SAP_CALD.[Model];

which works fine. I want to look at the query SAP_CALD and disclude any record in the field 'department' that has a record of any {DPSG, System, Dealer, DealerIT, Inbound}..I can do this by piggybacking a another query that removes these but wondered if it would be easier to exclude them in the crosstab code.