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2-WAC_246-272.txt - WAC - 10/3/2006 0:00:00 - Regulation - WA

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State
Washington Regulations
Chapter 246-272 WAC On-site sewage systems


(Effective Until July 1, 2007.)

Last Update: 7/18/05



246-272-990 Fees.

DISPOSITIONS OF SECTIONS FORMERLY CODIFIED IN THIS CHAPTER
246-272-001 Authority. [Statutory Authority: RCW 43.20.050. 91-02-051 (Order 124B), recodified as § 246-272-001, filed 12/27/90, effective 1/31/91; 83-13-014 (Order 259), § 248-96-010, filed 6/3/83; Order 101, § 248-96-010, filed 6/10/74.] Repealed by 94-09-025, filed 4/15/94, effective 1/1/95. Statutory Authority: RCW 43.20.050.
246-272-00101 Purpose, objectives, and authority. [Statutory Authority: RCW 43.20.050. 94-09-025, § 246-272-00101, filed 4/15/94, effective 1/1/95.] Repealed by 05-15-119, filed 7/18/05, effective 7/1/07. Statutory Authority: RCW 43.20.050. Later promulgation, see chapter 246-272A WAC.
246-272-002 Purpose and objectives. [Statutory Authority: RCW 43.20.050. 91-02-051 (Order 124B), recodified as § 246-272-002, filed 12/27/90, effective 1/31/91; 83-13-014 (Order 259), § 248-96-011, filed 6/3/83; Order 101, § 248-96-011, filed 6/10/74.] Repealed by 94-09-025, filed 4/15/94, effective 1/1/95. Statutory Authority: RCW 43.20.050.
246-272-005 Administration. [Statutory Authority: RCW 43.20.050. 91-02-051 (Order 124B), recodified as § 246-272-005, filed 12/27/90, effective 1/31/91; 83-13-014 (Order 259), § 248-96-018, filed 6/3/83; Order 101, § 248-96-018, filed 6/10/74.] Repealed by 94-09-025, filed 4/15/94, effective 1/1/95. Statutory Authority: RCW 43.20.050.
246-272-00501 Administration. [Statutory Authority: RCW 43.20.050. 94-09-025, § 246-272-00501, filed 4/15/94, effective 1/1/95.] Repealed by 05-15-119, filed 7/18/05, effective 7/1/07. Statutory Authority: RCW 43.20.050. Later promulgation, see chapter 246-272A WAC.
246-272-010 Definitions. [Statutory Authority: RCW 43.20.050. 92-02-019 (Order 225B), § 246-272-010, filed 12/23/91, effective 1/23/92; 91-02-051 (Order 124B), recodified as § 246-272-010, filed 12/27/90, effective 1/31/91. Statutory Authority: 1989 c 349. 89-21-026 (Order 332), § 248-96-020, filed 10/10/89, effective 11/10/89. Statutory Authority: RCW 43.20.050. 83-13-014 (Order 259), § 248-96-020, filed 6/3/83; 81-05-028 (Order 208), § 248-96-020, filed 2/18/81; 80-04-038 (Order 196), § 248-96-020, filed 3/20/80; Order 101, § 248-96-020, filed 6/10/74.] Repealed by 94-09-025, filed 4/15/94, effective 1/1/95. Statutory Authority: RCW 43.20.050.
246-272-01001 Definitions. [Statutory Authority: RCW 43.20.050. 94-09-025, § 246-272-01001, filed 4/15/94, effective 1/1/95.] Repealed by 05-15-119, filed 7/18/05, effective 7/1/07. Statutory Authority: RCW 43.20.050. Later promulgation, see chapter 246-272A WAC.
246-272-020 Local regulation. [Statutory Authority: RCW 43.20.050. 92-02-019 (Order 225B), § 246-272-020, filed 12/23/91, effective 1/23/92; 91-02-051 (Order 124B), recodified as § 246-272-020, filed 12/27/90, effective 1/31/91; 83-13-014 (Order 259), § 248-96-025, filed 6/3/83.] Repealed by 94-09-025, filed 4/15/94, effective 1/1/95. Statutory Authority: RCW 43.20.050.
246-272-02001 Local regulation. [Statutory Authority: RCW 43.20.050. 94-09-025, § 246-272-02001, filed 4/15/94, effective 1/1/95.] Repealed by 05-15-119, filed 7/18/05, effective 9/15/05. Statutory Authority: RCW 43.20.050. Later promulgation, see chapter 246-272A WAC.
246-272-030 Applicability. [Statutory Authority: RCW 43.20.050. 92-02-019 (Order 225B), § 246-272-030, filed 12/23/91, effective 1/23/92; 91-02-051 (Order 124B), recodified as § 246-272-030, filed 12/27/90, effective 1/31/91. Statutory Authority: 1989 c 349. 89-21-026 (Order 332), § 248-96-040, filed 10/10/89, effective 11/10/89. Statutory Authority: RCW 43.20.050. 83-13-014 (Order 259), § 248-96-040, filed 6/3/83; 80-04-038 (Order 196), § 248-96-040, filed 3/20/80; Order 101, § 248-96-040, filed 6/10/74.] Repealed by 94-09-025, filed 4/15/94, effective 1/1/95. Statutory Authority: RCW 43.20.050.
246-272-03001 Applicability. [Statutory Authority: RCW 43.20.050. 94-09-025, § 246-272-03001, filed 4/15/94, effective 1/1/95.] Repealed by 05-15-119, filed 7/18/05, effective 9/15/05. Statutory Authority: RCW 43.20.050. Later promulgation, see chapter 246-272A WAC.
246-272-040 Alternative systems. [Statutory Authority: RCW 43.20.050. 91-02-051 (Order 124B), recodified as § 246-272-040, filed 12/27/90, effective 1/31/91. Statutory Authority: 1989 c 349. 89-21-026 (Order 332), § 248-96-046, filed 10/10/89, effective 11/10/89. Statutory Authority: RCW 43.20.050. 83-13-014 (Order 259), § 248-96-046, filed 6/3/83; Order 101, § 248-96-046, filed 6/10/74.] Repealed by 94-09-025, filed 4/15/94, effective 1/1/95. Statutory Authority: RCW 43.20.050.
246-272-04001 Alternative systems and proprietary devices. [Statutory Authority: RCW 43.20.050. 94-09-025, § 246-272-04001, filed 4/15/94, effective 1/1/95.] Repealed by 05-15-119, filed 7/18/05, effective 9/15/05. Statutory Authority: RCW 43.20.050. Later promulgation, see chapter 246-272A WAC.
246-272-050 Experimental systems. [Statutory Authority: RCW 43.20.050. 91-02-051 (Order 124B), recodified as § 246-272-050, filed 12/27/90, effective 1/31/91; 83-13-014 (Order 259), § 248-96-047, filed 6/3/83.] Repealed by 94-09-025, filed 4/15/94, effective 1/1/95. Statutory Authority: RCW 43.20.050.
246-272-05001 Experimental systems. [Statutory Authority: RCW 43.20.050. 94-09-025, § 246-272-05001, filed 4/15/94, effective 1/1/95.] Repealed by 05-15-119, filed 7/18/05, effective 9/15/05. Statutory Authority: RCW 43.20.050. Later promulgation, see chapter 246-272A WAC.
246-272-060 No surface discharge. [Statutory Authority: RCW 43.20.050. 92-02-019 (Order 225B), § 246-272-060, filed 12/23/91, effective 1/23/92; 91-02-051 (Order 124B), recodified as § 246-272-060, filed 12/27/90, effective 1/31/91; 83-13-014 (Order 259), § 248-96-050, filed 6/3/83; Order 101, § 248-96-050, filed 6/10/74.] Repealed by 94-09-025, filed 4/15/94, effective 1/1/95. Statutory Authority: RCW 43.20.050.
246-272-070 Connection to public sewer system. [Statutory Authority: RCW 43.20.050. 91-02-051 (Order 124B), recodified as § 246-272-070, filed 12/27/90, effective 1/31/91. Statutory Authority: 1989 c 349. 89-21-026 (Order 332), § 248-96-060, filed 10/10/89, effective 11/10/89. Statutory Authority: RCW 43.20.050. 83-13-014 (Order 259), § 248-96-060, filed 6/3/83; Order 101, § 248-96-060, filed 6/10/74.] Repealed by 94-09-025, filed 4/15/94, effective 1/1/95. Statutory Authority: RCW 43.20.050.
246-272-07001 Connection to public sewer system. [Statutory Authority: RCW 43.20.050. 94-09-025, § 246-272-07001, filed 4/15/94, effective 1/1/95.] Repealed by 05-15-119, filed 7/18/05, effective 9/15/05. Statutory Authority: RCW 43.20.050. Later promulgation, see chapter 246-272A WAC.
246-272-080 Larger on-site sewage systems. [Statutory Authority: RCW 43.20.050. 92-02-019 (Order 225B), § 246-272-080, filed 12/23/91, effective 1/23/92; 91-02-051 (Order 124B), recodified as § 246-272-080, filed 12/27/90, effective 1/31/91; 83-13-014 (Order 259), § 248-96-075, filed 6/3/83; 80-04-038 (Order 196), § 248-96-075, filed 3/20/80; Order 101, § 248-96-075, filed 6/10/74.] Repealed by 94-09-025, filed 4/15/94, effective 1/1/95. Statutory Authority: RCW 43.20.050.
246-272-08001 Large on-site sewage systems (LOSS). [Statutory Authority: RCW 43.20.050. 94-09-025, § 246-272-08001, filed 4/15/94, effective 1/1/95.] Repealed by 05-15-119, filed 7/18/05, effective 9/15/05. Statutory Authority: RCW 43.20.050. Later promulgation, see chapter 246-272A WAC.
246-272-090 Permit. [Statutory Authority: RCW 43.20.050. 91-02-051 (Order 124B), recodified as § 246-272-090, filed 12/27/90, effective 1/31/91; 83-13-014 (Order 259), § 248-96-080, filed 6/3/83; 80-04-038 (Order 196), § 248-96-080, filed 3/20/80; Order 101, § 248-96-080, filed 6/10/74.] Repealed by 94-09-025, filed 4/15/94, effective 1/1/95. Statutory Authority: RCW 43.20.050.
246-272-09001 Permits for OSS under three thousand five hundred gallons per day. [Statutory Authority: RCW 43.20.050. 94-09-025, § 246-272-09001, filed 4/15/94, effective 1/1/95.] Repealed by 05-15-119, filed 7/18/05, effective 7/1/07. Statutory Authority: RCW 43.20.050. Later promulgation, see chapter 246-272A WAC.
246-272-09501 Location. [Statutory Authority: RCW 43.20.050. 94-09-025, § 246-272-09501, filed 4/15/94, effective 1/1/95.] Repealed by 05-15-119, filed 7/18/05, effective 7/1/07. Statutory Authority: RCW 43.20.050. Later promulgation, see chapter 246-272A WAC.
246-272-100 Minimum land area requirement. [Statutory Authority: RCW 43.20.050. 92-02-019 (Order 225B), § 246-272-100, filed 12/23/91, effective 1/23/92; 91-02-051 (Order 124B), recodified as § 246-272-100, filed 12/27/90, effective 1/31/91; 83-13-014 (Order 259), § 248-96-090, filed 6/3/83; Order 101, § 248-96-090, filed 6/10/74.] Repealed by 94-09-025, filed 4/15/94, effective 1/1/95. Statutory Authority: RCW 43.20.050.
246-272-110 Determination of site characteristics. [Statutory Authority: RCW 43.20.050. 92-02-019 (Order 225B), § 246-272-110, filed 12/23/91, effective 1/23/92; 91-02-051 (Order 124B), recodified as § 246-272-110, filed 12/27/90, effective 1/31/91; 83-13-014 (Order 259), § 248-96-094, filed 6/3/83.] Repealed by 94-09-025, filed 4/15/94, effective 1/1/95. Statutory Authority: RCW 43.20.050.
246-272-11001 Soil and site evaluation. [Statutory Authority: RCW 43.20.050. 94-09-025, § 246-272-11001, filed 4/15/94, effective 1/1/95.] Repealed by 05-15-119, filed 7/18/05, effective 7/1/07. Statutory Authority: RCW 43.20.050. Later promulgation, see chapter 246-272A WAC.
246-272-11501 Design. [Statutory Authority: RCW 43.20.050. 94-09-025, § 246-272-11501, filed 4/15/94, effective 1/1/95.] Repealed by 05-15-119, filed 7/18/05, effective 7/1/07. Statutory Authority: RCW 43.20.050. Later promulgation, see chapter 246-272A WAC.
246-272-120 Subdivision and individual site review. [Statutory Authority: RCW 43.20.050. 92-02-019 (Order 225B), § 246-272-120, filed 12/23/91, effective 1/23/92; 91-02-051 (Order 124B), recodified as § 246-272-120, filed 12/27/90, effective 1/31/91; 83-13-014 (Order 259), § 248-96-095, filed 6/3/83; Order 101, § 248-96-095, filed 6/10/74.] Repealed by 94-09-025, filed 4/15/94, effective 1/1/95. Statutory Authority: RCW 43.20.050.
246-272-12501 Holding tank sewage systems. [Statutory Authority: RCW 43.20.050. 94-09-025, § 246-272-12501, filed 4/15/94, effective 1/1/95.] Repealed by 05-15-119, filed 7/18/05, effective 7/1/07. Statutory Authority: RCW 43.20.050. Later promulgation, see chapter 246-272A WAC.
246-272-130 Larger tract requirements. [Statutory Authority: RCW 43.20.050. 92-02-019 (Order 225B), § 246-272-130, filed 12/23/91, effective 1/23/92; 91-02-051 (Order 124B), recodified as § 246-272-130, filed 12/27/90, effective 1/31/91; 83-13-014 (Order 259), § 248-96-096, filed 6/3/83; Order 101, § 248-96-096, filed 6/10/74.] Repealed by 94-09-025, filed 4/15/94, effective 1/1/95. Statutory Authority: RCW 43.20.050.
246-272-13501 Installation. [Statutory Authority: RCW 43.20.050. 94-09-025, § 246-272-13501, filed 4/15/94, effective 1/1/95.] Repealed by 05-15-119, filed 7/18/05, effective 7/1/07. Statutory Authority: RCW 43.20.050. Later promulgation, see chapter 246-272A WAC.
246-272-140 Location. [Statutory Authority: RCW 43.20.050. 91-02-051 (Order 124B), recodified as § 246-272-140, filed 12/27/90, effective 1/31/91; 83-13-014 (Order 259), § 248-96-100, filed 6/3/83; Order 101, § 248-96-100, filed 6/10/74.] Repealed by 94-09-025, filed 4/15/94, effective 1/1/95. Statutory Authority: RCW 43.20.050.
246-272-14501 Inspection. [Statutory Authority: RCW 43.20.050. 94-09-025, § 246-272-14501, filed 4/15/94, effective 1/1/95.] Repealed by 05-15-119, filed 7/18/05, effective 7/1/07. Statutory Authority: RCW 43.20.050. Later promulgation, see chapter 246-272A WAC.
246-272-150 Design. [Statutory Authority: RCW 43.20.050. 92-02-019 (Order 225B), § 246-272-150, filed 12/23/91, effective 1/23/92; 91-02-051 (Order 124B), recodified as § 246-272-150, filed 12/27/90, effective 1/31/91. Statutory Authority: 1989 c 349. 89-21-026 (Order 332), § 248-96-110, filed 10/10/89, effective 11/10/89. Statutory Authority: RCW 43.20.050. 83-13-014 (Order 259), § 248-96-110, filed 6/3/83; Order 101, § 248-96-110, filed 6/10/74.] Repealed by 94-09-025, filed 4/15/94, effective 1/1/95. Statutory Authority: RCW 43.20.050.
246-272-15501 Operation and maintenance. [Statutory Authority: RCW 43.20.050. 94-09-025, § 246-272-15501, filed 4/15/94, effective 1/1/95.] Repealed by 05-15-119, filed 7/18/05, effective 7/1/07. Statutory Authority: RCW 43.20.050. Later promulgation, see chapter 246-272A WAC.
246-272-160 Repair of failures along marine shorelines. [Statutory Authority: RCW 43.20.050. 92-02-019 (Order 225B), § 246-272-160, filed 12/23/91, effective 1/23/92; 91-02-051 (Order 124B), recodified as § 246-272-160, filed 12/27/90, effective 1/31/91. Statutory Authority: 1989 c 349. 89-21-026 (Order 332), § 248-96-120, filed 10/10/89, effective 11/10/89.] Repealed by 94-09-025, filed 4/15/94, effective 1/1/95. Statutory Authority: RCW 43.20.050.
246-272-16501 Repair of failures. [Statutory Authority: RCW 43.20.050. 94-09-025, § 246-272-16501, filed 4/15/94, effective 1/1/95.] Repealed by 05-15-119, filed 7/18/05, effective 7/1/07. Statutory Authority: RCW 43.20.050. Later promulgation, see chapter 246-272A WAC.
246-272-170 Marine expansions. [Statutory Authority: RCW 43.20.050. 92-02-019 (Order 225B), § 246-272-170, filed 12/23/91, effective 1/23/92; 91-02-051 (Order 124B), recodified as § 246-272-170, filed 12/27/90, effective 1/31/91. Statutory Authority: 1989 c 349. 89-21-026 (Order 332), § 248-96-125, filed 10/10/89, effective 11/10/89.] Repealed by 94-09-025, filed 4/15/94, effective 1/1/95. Statutory Authority: RCW 43.20.050.
246-272-17501 Expansions. [Statutory Authority: RCW 43.20.050. 94-09-025, § 246-272-17501, filed 4/15/94, effective 1/1/95.] Repealed by 05-15-119, filed 7/18/05, effective 7/1/07. Statutory Authority: RCW 43.20.050. Later promulgation, see chapter 246-272A WAC.
246-272-180 Designer program. [Statutory Authority: RCW 43.20.050. 91-02-051 (Order 124B), recodified as § 246-272-180, filed 12/27/90, effective 1/31/91; 83-13-014 (Order 259), § 248-96-130, filed 6/3/83; Order 101, § 248-96-130, filed 6/10/74.] Repealed by 94-09-025, filed 4/15/94, effective 1/1/95. Statutory Authority: RCW 43.20.050.
246-272-18501 Abandonment. [Statutory Authority: RCW 43.20.050. 94-09-025, § 246-272-18501, filed 4/15/94, effective 1/1/95.] Repealed by 05-15-119, filed 7/18/05, effective 7/1/07. Statutory Authority: RCW 43.20.050. Later promulgation, see chapter 246-272A WAC.
246-272-190 Inspection. [Statutory Authority: RCW 43.20.050. 92-02-019 (Order 225B), § 246-272-190, filed 12/23/91, effective 1/23/92; 91-02-051 (Order 124B), recodified as § 246-272-190, filed 12/27/90, effective 1/31/91; 83-13-014 (Order 259), § 248-96-140, filed 6/3/83; Order 101, § 248-96-140, filed 6/10/74.] Repealed by 94-09-025, filed 4/15/94, effective 1/1/95. Statutory Authority: RCW 43.20.050.
246-272-19501 Septage management. [Statutory Authority: RCW 43.20.050. 94-09-025, § 246-272-19501, filed 4/15/94, effective 1/1/95.] Repealed by 05-15-119, filed 7/18/05, effective 7/1/07. Statutory Authority: RCW 43.20.050. Later promulgation, see chapter 246-272A WAC.
246-272-200 Appeals. [Statutory Authority: RCW 43.20.050. 91-02-051 (Order 124B), recodified as § 246-272-200, filed 12/27/90, effective 1/31/91; 83-13-014 (Order 259), § 248-96-150, filed 6/3/83.] Repealed by 94-09-025, filed 4/15/94, effective 1/1/95. Statutory Authority: RCW 43.20.050.
246-272-20501 Developments, subdivisions, and minimum land area requirements. [Statutory Authority: RCW 43.20.050. 94-09-025, § 246-272-20501, filed 4/15/94, effective 1/1/95.] Repealed by 05-15-119, filed 7/18/05, effective 7/1/07. Statutory Authority: RCW 43.20.050. Later promulgation, see chapter 246-272A WAC.
246-272-210 Waiver of state regulations. [Statutory Authority: RCW 43.20.050. 91-02-051 (Order 124B), recodified as § 246-272-210, filed 12/27/90, effective 1/31/91; 83-13-014 (Order 259), § 248-96-160, filed 6/3/83; Order 101, § 248-96-160, filed 6/10/74.] Repealed by 94-09-025, filed 4/15/94, effective 1/1/95. Statutory Authority: RCW 43.20.050.
246-272-21501 Areas of special concern. [Statutory Authority: RCW 43.20.050. 94-09-025, § 246-272-21501, filed 4/15/94, effective 1/1/95.] Repealed by 05-15-119, filed 7/18/05, effective 9/15/05. Statutory Authority: RCW 43.20.050. Later promulgation, see chapter 246-272A WAC.
246-272-220 Disposal of septic tank waste. [Statutory Authority: RCW 43.20.050. 91-02-051 (Order 124B), recodified as § 246-272-220, filed 12/27/90, effective 1/31/91; Order 101, § 248-96-170, filed 6/10/74.] Repealed by 94-09-025, filed 4/15/94, effective 1/1/95. Statutory Authority: RCW 43.20.050.
246-272-22501 Certification of designers, installers, pumpers, inspectors, and maintenance personnel. [Statutory Authority: RCW 43.20.050. 94-09-025, § 246-272-22501, filed 4/15/94, effective 1/1/95.] Repealed by 05-15-119, filed 7/18/05, effective 7/1/07. Statutory Authority: RCW 43.20.050. Later promulgation, see chapter 246-272A WAC.
246-272-230 Installer requirements. [Statutory Authority: RCW 43.20.050. 91-02-051 (Order 124B), recodified as § 246-272-230, filed 12/27/90, effective 1/31/91; 83-13-014 (Order 259), § 248-96-175, filed 6/3/83; Order 101, § 248-96-175, filed 6/10/74.] Repealed by 94-09-025, filed 4/15/94, effective 1/1/95. Statutory Authority: RCW 43.20.050.
246-272-23501 Technical review committee. [Statutory Authority: RCW 43.20.050. 94-09-025, § 246-272-23501, filed 4/15/94, effective 1/1/95.] Repealed by 05-15-119, filed 7/18/05, effective 9/15/05. Statutory Authority: RCW 43.20.050. Later promulgation, see chapter 246-272A WAC.
246-272-240 State advisory committee. [Statutory Authority: RCW 43.20.050. 91-02-051 (Order 124B), recodified as § 246-272-240, filed 12/27/90, effective 1/31/91; 83-13-014 (Order 259), § 248-96-180, filed 6/3/83; Order 101, § 248-96-180, filed 6/10/74.] Repealed by 94-09-025, filed 4/15/94, effective 1/1/95. Statutory Authority: RCW 43.20.050.
246-272-24001 State advisory committee. [Statutory Authority: RCW 43.20.050. 94-09-025, § 246-272-24001, filed 4/15/94, effective 1/1/95.] Repealed by 05-15-119, filed 7/18/05, effective 9/15/05. Statutory Authority: RCW 43.20.050. Later promulgation, see chapter 246-272A WAC.
246-272-25001 Waiver of state regulations. [Statutory Authority: RCW 43.20.050. 95-09-018, § 246-272-25001, filed 4/11/95, effective 5/12/95; 94-09-025, § 246-272-25001, filed 4/15/94, effective 1/1/95.] Repealed by 05-15-119, filed 7/18/05, effective 9/15/05. Statutory Authority: RCW 43.20.050. Later promulgation, see chapter 246-272A WAC.
246-272-26001 Enforcement. [Statutory Authority: RCW 43.20.050. 94-09-025, § 246-272-26001, filed 4/15/94, effective 1/1/95.] Repealed by 05-15-119, filed 7/18/05, effective 9/15/05. Statutory Authority: RCW 43.20.050. Later promulgation, see chapter 246-272A WAC.
246-272-27001 Notice of decision -- Adjudicative proceeding. [Statutory Authority: RCW 43.20.050. 94-09-025, § 246-272-27001, filed 4/15/94, effective 1/1/95.] Repealed by 05-15-119, filed 7/18/05, effective 9/15/05. Statutory Authority: RCW 43.20.050. Later promulgation, see chapter 246-272A WAC.
246-272-28001 Severability. [Statutory Authority: RCW 43.20.050. 94-09-025, § 246-272-28001, filed 4/15/94, effective 1/1/95.] Repealed by 05-15-119, filed 7/18/05, effective 9/15/05. Statutory Authority: RCW 43.20.050. Later promulgation, see chapter 246-272A WAC.



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246-272-00101
Purpose, objectives, and authority.
(1) The purpose of this chapter is to protect the public health by minimizing:

(a) The potential for public exposure to sewage from on-site sewage systems; and

(b) Adverse effects to public health that discharges from on-site sewage systems may have on ground and surface waters.

(2) This chapter regulates the location, design, installation, operation, maintenance, and monitoring of on-site sewage systems to:

(a) Achieve long-term sewage treatment and effluent disposal; and

(b) Limit the discharge of contaminants to waters of the state.

(3) This chapter is adopted by the state board of health in accordance with the authority granted in RCW 43.20.050 to establish minimum requirements for the department of health, and local boards of health whether or not they choose to adopt local regulations.



[Statutory Authority: RCW 43.20.050. 94-09-025, § 246-272-00101, filed 4/15/94, effective 1/1/95.]




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246-272-00501
Administration.
The local health officers and the department shall administer this chapter under the authority and requirements of chapters 70.05, 70.08, 70.46, and 43.70 RCW. Under RCW 70.05.060(7), fees may be charged for this administration.



[Statutory Authority: RCW 43.20.050. 94-09-025, § 246-272-00501, filed 4/15/94, effective 1/1/95.]




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246-272-01001
Definitions.
"Additive" means a commercial product added to an on-site sewage system intended to affect performance or aesthetics of an on-site sewage system.

"Alternative system" means an on-site sewage system other than a conventional gravity system or conventional pressure distribution system. Properly operated and maintained alternative systems provide equivalent or enhanced treatment performance as compared to conventional gravity systems.

"Approved" means a written statement of acceptability, in terms of the requirements in this chapter, issued by the local health officer or the department.

"Approved list" means "List of Approved Systems and Products," developed annually and maintained by the department and containing the following:

List of proprietary devices approved by the department;

List of specific systems meeting treatment standard 1 and treatment standard 2;

List of experimental systems approved by the department;

List of septic tanks, pump chambers, and holding tanks approved by the department.

"Area of special concern" means an area of definite boundaries delineated through public process, where a local health officer, or the department in consultation with the health officer, determines additional requirements for on-site sewage systems may be necessary to reduce potential failures, or minimize negative impact of on-site systems upon public health.

"Cesspool" means a pit receiving untreated sewage and allowing the liquid to seep into the surrounding soil or rock.

"Conforming system" means any on-site sewage system, except an experimental system, meeting any of the following criteria:

Systems in full compliance with new construction requirements under this chapter; or

Systems approved, installed, and operating in accordance with requirements of previous editions of this chapter; or

Systems or repairs permitted through departmental concurrence by the waiver process which assure public health protection by higher treatment performance or other methods.

"Conventional gravity system" means an on-site sewage system consisting of a septic tank and a subsurface soil absorption system with gravity distribution of the effluent.

"Conventional pressure distribution system" means an on-site sewage system consisting of a septic tank and a subsurface soil absorption system with pressure distribution of the effluent. Design, operation and maintenance, and performance monitoring are described by "Guidelines for Pressure Distribution Systems" by the Washington state department of health.

"Covenant" means a recorded agreement stating certain activities and/or practices are required or prohibited.

"Cuts and/or banks" means any naturally occurring or artificially formed slope greater than one hundred percent (forty-five degrees) and extending vertically at least five feet from the toe of the slope to the top of the slope as follows:





"Designer" means a person who matches site and soil characteristics with appropriate on-site sewage technology.

"Development" means the creation of a residence, structure, facility, mobile home park, subdivision, planned unit development, site, area, or any activity resulting in the production of sewage.

"Department" means the Washington state department of health.

"Disposal component" means a subsurface absorption system (SSAS) or other soil absorption system receiving septic tank or other pretreatment device effluent and transmitting it into original, undisturbed soil.

"Effluent" means liquid discharged from a septic tank or other on-site sewage system component.

"Engineer" means a person who is licensed and in good standing under chapter 18.43 RCW.

"Expansion" means a change in a residence, facility, site, or use that:

Causes an on-site sewage system to exceed its existing treatment or disposal capability, for example, when a residence is increased from two to three bedrooms or a change in use from an office to a restaurant; or

Reduces the treatment or disposal capability of the existing on-site sewage system or the reserve area, for example, when a building is placed over a reserve area.

"Experimental system" means any alternative system:

Without design guidelines developed by the department; or

A proprietary device or method which has not yet been evaluated and approved by the department.

"Failure" means a condition of an on-site sewage system that threatens the public health by inadequately treating sewage or by creating a potential for direct or indirect contact between sewage and the public. Examples of failure include:

Sewage on the surface of the ground;

Sewage backing up into a structure caused by slow soil absorption of septic tank effluent;

Sewage leaking from a septic tank, pump chamber, holding tank, or collection system;

Cesspools or seepage pits where evidence of ground water or surface water quality degradation exists;

Inadequately treated effluent contaminating ground water or surface water; or

Noncompliance with standards stipulated on the permit.

"Ground water" means a subsurface water occupying the zone of saturated soil, permanently, seasonally, or as the result of the tides. Indications of ground water may include:

Water seeping into or standing in an open excavation from the soil surrounding the excavation.

Spots or blotches of different color or shades of color interspersed with a dominant color in soil, commonly referred to as mottling. Mottling is a historic indication for the presence of ground water caused by intermittent periods of saturation and drying, and may be indicative of poor aeration and impeded drainage. Also see "water table."

"Holding tank sewage system" means an on-site sewage system which incorporates a holding tank, the services of a sewage pumper/hauler, and the off-site treatment and disposal for the sewage generated.

"Industrial wastewater" means the water or liquid carried waste from an industrial process. These wastes may result from any process or activity of industry, manufacture, trade or business, from the development of any natural resource, or from animal operations such as feedlots, poultry houses, or dairies. The term includes contaminated storm water and leachate from solid waste facilities.

"Installer" means a qualified person approved by a local health officer to install or repair on-site sewage systems or components.

"Large on-site sewage system (LOSS)" means any on-site sewage system with design flows, at any common point, greater than three thousand five hundred gallons per day.

"Local health officer" means the health officer of the city, county, or city-county health department or district within the state of Washington, or a representative authorized by and under the direct supervision of the local health officer, as defined in chapter 70.05 RCW.

"May" means discretionary, permissive, or allowed.

"On-site sewage system (OSS)" means an integrated arrangement of components for a residence, building, industrial establishment or other places not connected to a public sewer system which:

Convey, store, treat, and/or provide subsurface soil treatment and disposal on the property where it originates, upon adjacent or nearby property; and

Includes piping, treatment devices, other accessories, and soil underlying the disposal component of the initial and reserve areas.

"Ordinary high-water mark" means the mark on lakes, streams, and tidal waters, found by examining the beds and banks and ascertaining where the presence and action of waters are so common and usual, and so long continued in all ordinary years, as to mark upon the soil a character distinct from that of the abutting upland with respect to vegetation, as that condition exists on the effective date of this chapter, or as it may naturally change thereafter. The following definitions apply where the ordinary high-water mark cannot be found:

The ordinary high-water mark adjoining marine water is the elevation at mean higher high tide; and

The ordinary high-water mark adjoining freshwater is the line of mean high water.

"Person" means any individual, corporation, company, association, society, firm, partnership, joint stock company, or any governmental agency, or the authorized agents of any such entities.

"Planned unit development" means a development characterized by a unified site design, clustered residential units and/or commercial units, and areas of common open space.

"Pressure distribution" means a system of small diameter pipes equally distributing effluent throughout a trench or bed, as described in the "Guidelines for Pressure Distribution Systems" by the department. Also see "conventional pressure distribution."

"Proprietary device or method" means a device or method classified as an alternative system, or a component thereof, held under a patent, trademark or copyright.

"Public sewer system" means a sewerage system:

Owned or operated by a city, town, municipal corporation, county, or other approved ownership consisting of a collection system and necessary trunks, pumping facilities and a means of final treatment and disposal; and

Approved by or under permit from the department of ecology, the department of health and/or a local health officer.

"Pumper" means a person approved by the local health officer to remove and transport wastewater or septage from on-site sewage systems.

"Repair" means restoration, by reconstruction or relocation, or replacement of a failed on-site sewage system.

"Reserve area" means an area of land approved for the installation of a conforming system and dedicated for replacement of the OSS upon its failure.

"Residential sewage" means sewage having the constituency and strength typical of wastewater from domestic households.

"Restrictive layer" means a stratum impeding the vertical movement of water, air, and growth of plant roots, such as hardpan, claypan, fragipan, caliche, some compacted soils, bedrock and unstructured clay soils.

"Seepage pit" means an excavation more than three feet deep where the sidewall of the excavation is designed to dispose of septic tank effluent. Seepage pits may also be called "dry wells."

"Septage" means the mixture of solid wastes, scum, sludge, and liquids pumped from within septic tanks, pump chambers, holding tanks, and other OSS components.

"Septic tank" means a watertight pretreatment receptacle receiving the discharge of sewage from a building sewer or sewers, designed and constructed to permit separation of settleable and floating solids from the liquid, detention and anaerobic digestion of the organic matter, prior to discharge of the liquid.

"Sewage" means any urine, feces, and the water carrying human wastes, including kitchen, bath, and laundry wastes from residences, buildings, industrial establishments or other places. For the purposes of these regulations, "sewage" is generally synonymous with domestic wastewater. Also see "residential sewage."

"Shall" means mandatory.

"Soil log" means a detailed description of soil characteristics providing information on the soil's capacity to act as an acceptable treatment and disposal medium for sewage.

"Soil type" means a numerical classification of fine earth particles and coarse fragments as described in WAC 246-272-11001 (2)(e).

"Subdivision" means a division of land or creation of lots or parcels, described under chapter 58.17 RCW, now or as hereafter amended, including both long and short subdivisions, planned unit developments, and mobile home parks.

"SSAS" or "subsurface soil absorption system" means a system of trenches three feet or less in width, or beds between three and ten feet in width, containing distribution pipe within a layer of clean gravel designed and installed in original, undisturbed soil for the purpose of receiving effluent and transmitting it into the soil.

"Surface water" means any body of water, whether fresh or marine, flowing or contained in natural or artificial unlined depressions for significant periods of the year, including natural and artificial lakes, ponds, springs, rivers, streams, swamps, marshes, and tidal waters.

"Table VI repair" means a repair or replacement of an existing on-site sewage system which, because of site limitations, must utilize treatment standards shown in Table VI in lieu of compliance with new construction requirements for vertical separation and/or horizontal set back from surface waters or drinking water wells or springs.

"Treatment standard 1" means a thirty-day average of less than 10 milligrams per liter of biochemical oxygen demand (five-day BOD5), 10 milligrams per liter of total suspended solids (TSS), and a thirty-day geometric mean of less than 200 fecal coliform per 100 milliliters.

"Treatment standard 2" means a thirty-day average of less than 10 milligrams per liter of biochemical oxygen demand (five-day BOD5), 10 milligrams per liter of total suspended solids (TSS), and a thirty-day geometric mean of less than 800 fecal coliform per 100 milliliters.

"Unit volume of sewage" means:

A single family residence;

A mobile home site in a mobile home park; or

Four hundred fifty gallons of sewage per day where the proposed development is not single family residences or a mobile home park.

"Vertical separation" means the depth of unsaturated, original, undisturbed soil of soil types 1B-6 between the bottom of a disposal component and the highest seasonal water table, a restrictive layer, or soil type 1A, as illustrated below by the profile drawing of a subsurface soil absorption system:





"Water table" means the upper surface of the ground water, whether permanent or seasonal. Also see "ground water."

"Wave barrier" means a bulkhead of adequate height and construction protecting the immediate area of on-site sewage system components from wave action.



[Statutory Authority: RCW 43.20.050. 94-09-025, § 246-272-01001, filed 4/15/94, effective 1/1/95.]




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246-272-09001
Permits for OSS under three thousand five hundred gallons per day.
(1) Prior to beginning the construction process, a person proposing the installation, repair, modification, connection to, or expansion of an OSS, shall develop and submit the following to the local health officer and obtain approval:

(a) General information including:

(i) Name and address of the property owner and the applicant at the head of each page of submission;

(ii) Parcel number and address, if available, of the site;

(iii) Source of drinking water supply;

(iv) Identification if the property is within the boundaries of a recognized sewer utility;

(v) Size of the parcel;

(vi) Type of permit for which application is being made, for example, new installation, repair, expansion, alteration, or operational;

(vii) Source of sewage, for example, residential, restaurant, or other type of business;

(viii) Location of utilities;

(ix) Name of the site evaluator;

(x) Name of the designer;

(xi) Date of application; and

(xii) Signature of applicant.

(b) The soil and site evaluation as specified under WAC 246-272-11001(2).

(c) A complete, detailed, and dimensional site plan including:

(i) Designated areas for the proposed initial system and the reserve area;

(ii) The location of all soil logs and other soil tests for the OSS;

(iii) General topography and/or slope of the site;

(iv) Site drainage characteristics;

(v) The location of existing and proposed encumbrances affecting system placement, including legal access documents if any component of the OSS is not on the lot where the sewage is generated; and

(vi) An arrow indicating north.

(d) A detailed system design meeting the requirements under WAC 246-272-11501 including:

(i) A dimensional drawing showing the location of components of the proposed OSS, and the system designed for the reserve area if reserve site characteristics differ significantly from the initial area;

(ii) Vertical cross-section drawings showing:

(A) The depth of the disposal component, the vertical separation, and depth of soil cover; and

(B) Other OSS components constructed at the site.

(iii) Calculations and assumptions supporting the proposed design, including:

(A) Soil type;

(B) Hydraulic loading rate in the disposal component; and

(C) System's maximum daily flow capacity.

(e) Such additional information as deemed necessary by the local health officer.

(2) The local health officer may develop the required information specified in subsection (1) of this section if authorization for such actions is included in local regulations.

(3) The local health officer shall:

(a) Issue a permit when the information submitted under subsection (1) of this section meets the requirements contained in this chapter and in local regulations;

(b) Identify the permit as a new installation, repair, expansion, modification, or operational permit;

(c) Specify the expiration date on the permit;

(d) Include a reminder on the permit application of the applicant's right of appeal; and

(e) State the period of validity and the date and conditions of renewal when requiring operational permits to be obtained and retained;

(4) The local health officer may revoke or deny a permit for due cause. Examples include, but are not limited to:

(a) Development or continued use of an OSS that threatens the public health;

(b) Misrepresentation or concealment of material fact in information submitted to the local health officer; or

(c) Failure to meet conditions of the permit or the regulations.

(5) Before the local health officer issues a permit for the installation of an OSS to serve more than one development, the applicant shall show:

(a) An approved public entity owning or managing the OSS in perpetuity; or

(b) An arrangement with a management entity acceptable to the local health officer, recorded in covenant, lasting until the on-site system is no longer needed, and containing, but not limited to:

(i) A legal easement allowing access for construction, operation and maintenance, and repair of the OSS; and

(ii) Identification of an adequate financing mechanism to assure the funding of operation, maintenance, and repair of the OSS.

(6) The local health officer shall not delegate the authority to issue permits.

(7) The local health officer may stipulate additional requirements for a particular permit if necessary for public health protection.



[Statutory Authority: RCW 43.20.050. 94-09-025, § 246-272-09001, filed 4/15/94, effective 1/1/95.]




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246-272-09501
Location.
(1) Persons shall design and install OSS to meet the minimum horizontal separations shown in Table I, Minimum Horizontal Separations:

TABLE I

MINIMUM HORIZONTAL SEPARATIONS
Items requiring setback From edge of disposal component and reserve area From septic tank, holding tank, containment vessel, pump chamber, and distribution box From building sewer, collection, and non-perforated distribution line1
Nonpublic well or suction line 100 ft. 50 ft. 50 ft.
Public drinking water well 100 ft. 100 ft. 100 ft.
Public drinking water spring3 200 ft. 200 ft. 100 ft.
Spring or surface water used as drinking water source2,3 100 ft. 50 ft. 50 ft.
Pressurized water supply line4 10 ft. 10 ft. 10 ft.
Properly decommissioned well5 10 ft. N/A N/A
Surface water3
Marine water 100 ft. 50 ft. 10 ft.
Fresh water 100 ft. 50 ft. 10 ft.
Building foundation 10 ft.6 5 ft 6 2 ft.
Property or easement line6 5 ft. 5 ft. N/A
Interceptor / curtain drains/ drainage ditches
Down-gradient7 30 ft. 5 ft. N/A
Up-gradient7 10 ft. N/A N/A
Down-gradient cuts or banks with at least 5 ft. of original, undisturbed soil above a restrictive layer due to a structural or textural change 25 ft. N/A N/A
Down-gradient cuts or banks with at least 5 ft. of original, undisturbed soil above a restrictive layer due to a structural or textural change 50 ft. N/A N/A

1 "Building sewer" as defined by the most current edition of the Uniform Plumbing Code. "Nonperforated distribution" includes pressure sewer transport lines.
2 If surface water is used as a public drinking water supply, the designer shall locate the OSS outside of the required sanitary control area.
3 Measured from the ordinary high-water mark.
4 The local health officer may approve a sewer transport line within ten feet of a water supply line if the sewer line is constructed in accordance with section 2.4 of the department of ecology's "Criteria For Sewage Works Design," revised October 1985, or equivalent.
5 Before any component can be placed within one hundred feet of a well, the designer shall submit a "decommissioned water well report" provided by a licensed well driller, which verifies that appropriate decommissioning procedures noted in chapter 173-160 WAC were followed. Once the well is properly decommissioned, it no longer provides a potential conduit to ground water, but septic tanks, pump chambers, containment vessels, or distribution boxes should not be placed directly over the site.
6 The local health officer may allow a reduced horizontal separation to not less than two feet where the property line, easement line, or building foundation is up-gradient.
7 The item is down-gradient when liquid will flow toward it upon encountering a water table or a restrictive layer. The item is up-gradient when liquid will flow away from it upon encountering a water table or restrictive layer.

(2) Where any condition indicates a greater potential for contamination or pollution, the local health officer or the department may increase the minimum horizontal separations. Examples of such conditions include excessively permeable soils, unconfined aquifers, shallow or saturated soils, dug wells, and improperly abandoned wells.

(3) The horizontal separation between an OSS disposal component and an individual water well, spring, or surface water can be reduced to a minimum of seventy-five feet, by the local health officer, and be described as a "conforming" system upon signed approval by the health officer if the applicant demonstrates:

(a) Adequate protective site specific conditions, such as physical settings with low hydro-geologic susceptibility from contaminant infiltration. Examples of such conditions include evidence of confining layers and or aquatards separating potable water from the OSS treatment zone, excessive depth to ground water, down-gradient contaminant source, or outside the zone of influence; or

(b) Design and proper operation of an OSS system assuring enhanced treatment performance beyond that accomplished by meeting the vertical separation and effluent distribution requirements described in WAC 246-272-11501 (2)(f) Table IV; or

(c) Evidence of protective conditions involving both (a) and (b) of this subsection.

(4) Persons shall design and/or install disposal components only where:

(a) The slope is less than forty-five percent (twenty-four degrees);

(b) The area is not subject to:

(i) Encroachment by buildings or construction such as placement of swimming pools, power poles and underground utilities;

(ii) Cover by impervious material;

(iii) Vehicular traffic; or

(iv) Other activities adversely affecting the soil or the performance of the OSS.

(c) Sufficient reserve area for replacement exists to treat and dispose one hundred percent of the design flow;

(d) The land is stable; and

(e) Surface drainage is directed away from the site.

(5) A local health officer may allow expansion of an existing on-site sewage system adjacent to a marine shoreline that does not meet the minimum horizontal separation between the disposal component and the ordinary high water mark required by WAC 246-272-09501 Table I, provided that:

(a) The system meets all requirements of WAC 246-272-11501;

(b) The system complies with all other requirements of WAC 246-272-09501 and 246-272-17501;

(c) Horizontal separation between the disposal component and the ordinary high water mark is fifty feet or greater; and

(d) Vertical separation is three feet or greater with a conventional gravity drainfield, or two feet or greater with a conventional pressure distribution drainfield.



[Statutory Authority: RCW 43.20.050. 94-09-025, § 246-272-09501, filed 4/15/94, effective 1/1/95.]




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246-272-11001
Soil and site evaluation.
(1) The local health officer or department shall permit only engineers, qualified designers and soil scientists to perform soil and site evaluations.

(2) The person evaluating the soil and site shall:

(a) Record:

(i) A sufficient number of soil logs to evaluate conditions within:

(A) The initial disposal component; and

(B) The reserve area.

(ii) The ground water conditions, the date of the observation, and the probable maximum height;

(iii) The topography of the site;

(iv) The drainage characteristics of the site;

(v) The existence of structurally deficient soils subject to major wind or water erosion events such as slide zones and dunes;

(vi) The existence of designated flood plains; and

(vii) The location of existing encumbrances affecting system placement, such as:

(A) Wells and suction lines;

(B) Water sources and supply lines;

(C) Surface water;

(D) Abandoned wells;

(E) Outcrops of bedrock and restrictive layers;

(F) Buildings;

(G) Property lines and lines of easement;

(H) Interceptors such as footing drains, curtain drains and drainage ditches;

(I) Cuts, banks, and fills;

(J) Driveways and parking areas;

(K) Existing OSS; and

(L) Underground utilities.

(b) Use the soil and site evaluation procedures and terminology in accordance with chapter 3 and Appendix A of the "Design Manual: On-site Wastewater Treatment and Disposal Systems," United States Environmental Protection Agency, EPA-625/1-80-012, October, 1980, except where modified by, or in conflict, with this chapter (available upon written request to the department);

(c) Use the soil names and particle size limits of the United States Department of Agriculture Soil Conservation Service classification system;

(d) Determine texture, structure, compaction and other soil characteristics that affect the treatment and water movement potential of the soil by using normal field and/or laboratory procedures such as particle size analysis; and

(e) Classify the soil as in Table II, Soil Textural Classification:

TABLE II

SOIL TEXTURAL CLASSIFICATION
Soil Type Soil Textural Classifications
1A Very gravelly1 coarse sands or coarser. All extremely gravelly2 soils.
1B Very gravelly medium sand, very gravelly fine sand, very gravelly very fine sand, very gravelly loamy sands.
2A Coarse sands (also includes ASTM C-33 sand).
2B Medium sands.
3 Fine sands, loamy coarse sands, loamy medium sands.
4 Very fine sands, loamy fine sands, loamy very fine sands, sandy loams, loams.
5 Silt loams, that are porous and have well developed structure.
6 Other silt loams, sandy clay loams, clay loams, silty clay loams.
Unsuitable

for

treatment

or

disposal Sandy clay, clay, silty clay, and strongly cemented or firm soils.

1 Very Gravelly = >35% and <60% gravel and coarse fragments, by volume.
2 Extremely Gravelly = >60% gravel and coarse fragments, by volume.

(3) The owner of the property or his agent shall:

(a) Prepare the soil log excavation to:

(i) Allow examination of the soil profile in its original position by:

(A) Excavating pits of sufficientdimensions to enable observation of soil characteristics by visual and tactile means to a depth three feet deeper than the anticipated bottom of the disposal component; or (continued)
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