Too Many Results From One Table And Other Problems

ok, i'm not the strongest SQL programmer, so i can't figure this out. i'm working on a report with the following source code:

SELECT vio_access_mid.safety_survey_date, vio_access_mid.violation, vio_access_mid.comments, vio_chemical_mid.violation AS chem_vio, vio_chemical_mid.comments AS chem_comm, vio_chemical_mid.safety_survey_date AS chem_date

FROM vio_access_mid INNER JOIN vio_chemical_mid ON vio_access_mid.lab_id = dbo.vio_chemical_mid.lab_id

WHERE EXISTS
(SELECT ehs_labs.lab_id, tbl_list_building.building_desc, tbl_list_department.department_desc, ehs_labs.lab_room, ehs_list_lab_type.lab_type_desc, ehs_princ_inv.princ_inv_fname, ehs_princ_inv.princ_inv_lname
FROM ehs_labs INNER JOIN tbl_list_building ON ehs_labs.building_id = tbl_list_building.building_id INNER JOIN tbl_list_department ON ehs_labs.department_id = tbl_list_department.department_id INNER JOIN ehs_list_lab_type ON ehs_labs.lab_type_id = ehs_list_lab_type.lab_type_id INNER JOIN ehs_princ_inv ON ehs_labs.lab_id = ehs_princ_inv.lab_id
WHERE (ehs_labs.building_id = '0146') AND (ehs_labs.lab_room = '5678'))

AND (vio_access_mid.safety_survey_date = '6/1/2005') AND (vio_chemical_mid.safety_survey_date = '6/1/2005')


when i run the code, i get the correct amount of records (3) from vio_access_mid, but i also get 3 from vio_chemical_mid when in reality there are only 2 records. i will eventually add other vio_*_mid tables that will have a variety of results (some may have 0 while others might have 4 or 5, etc).

i would eventually like to be able to include the info from the WHERE EXISTS clause in my results, but one thing at a time...

anyone have suggestions on how to get the correct info from each vio_*_mid table?