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• • DEPARTMENT OF PLANNING AND DEVELOPMENT POLICY REGARDING LIFE-EXTENDING CONSTRUCTION effective March 1, 1988 SUBJECT: On-Site Sewage Disposal Requirements Applicable to Life-Extending Building Construction. SCOPE: This policy is applicable in those circumstances where the repair or improvement of an on-site sewage disposal system is warranted in conjunction with life-extending building construction. This policy is applicable County-wide to residential structures only, and is intended to supplement existing Ordinances. In all cases, connection to sanitary sewerage shall be required consistent with the provisions of Section 6-4.102 of the Los Altos Hills Municipal Code instead of Section B11-16 of the Santa Clara County Ordinance Code. CATEGORY I - Major Expansion and/or Major Intensification of Use. Where construction associated with an existing structure will result in a major expansion of the structure (greater than 500 cumulative square feet of all additions) or where such construction will result in a major intensification of the use of the property, the on-site sewage disposal system shall meet the minimum prevailing sewage disposal requirements of the Santa Clara County Ordinance Code. Provided, however, each condition made applicable to a "minor expansion" below also shall be applicable to a "major expansion." CATEGORY II - Minor Expansion. Where construction associated with an existing structure will result in a minor expansion of the structure (500 cumulative square feet or less of all additions), the following conditions are applicable: A. Require on-site inspection by Environmental Health Services (EHS) to determine adequacy and safe functioning of existing sewage disposal system. B. Require exposure and pumping of existing septic tank except EXHIBIT "A"