30. (1) The owner and the operator of a landfilling site shall ensure that the final slopes above grade within the waste fill zone at the time of site closure do not exceed one unit vertical to four units horizontal and are not less than one unit vertical to 20 units horizontal.  O. Reg. 232/98, s. 30 (1). (2) Subsection (1) does not apply if a written report has been prepared that confirms that an alternative design for the final slopes is acceptable, having regard to the slope stability of the deposited waste and final cover, the potential for erosion of the final cover, the proposed end use of the site and the infiltration requirements for ground water protection.  O. Reg. 232/98, s. 30 (2). PART VI   CLOSURE Closure Report

31. The owner and the operator of a landfilling site shall ensure that a written report on activities for the closure of the site, activities for the post-closure care of the site and the proposed end use of the site is prepared not later than the date 90 per cent of the total waste disposal volume is reached or two years before the anticipated date of closure, whichever comes first.  O. Reg. 232/98, s. 31. Annual Post-Closure Care Report

32. The owner and the operator of a landfilling site shall ensure that, within three months after each anniversary of the date on which waste was last placed on the site, an annual report is prepared respecting the post-closure care of the landfilling site, including a summary of results from monitoring programs.  O. Reg. 232/98, s. 32.

33. Omitted (provides for coming into force of provisions of this Regulation).  O. Reg. 232/98, s. 33. TABLE 1   LEACHATE CHARACTERISTICS (Section 10) Column 1 Contaminant   Column 2 Initial Source Concentration (mg/L)   Column 3 Mass as a proportion of total (wet) mass of waste (mg/kg)   Column 4 Half-Life in Leachate (years)   Column 5 Health Related Drinking Water Objective (mg/L)   Column 6 Aesthetic Drinking Water Objective (mg/L) 

  1. Benzene   0.02   0.014   25   0.005   n/a 

  2. Cadmium   0.05   0.035   n/a   0.005   n/a 

  3. Chloride  ≤  150,000 t/ha increasing to ≥  250,000 t/ha   1,500 increasing to 2,500   1,800   n/a   n/a   250 

  4. Lead   0.6   0.42   n/a   0.01   n/a 

  5. 1,4 Di-chlorobenzene   0.01   0.007   50   n/a   0.001 

  6. Dichloro-methane   3.3   2.3   10   0.05   n/a 

  7. Toluene   1.0   0.7   15   n/a   0.024 

  8. Vinyl Chloride   0.055   0.039   25   0.002   n/a  Notes: 1. The initial source concentration of chloride is taken to vary linearly between 1,500 and 2,500 milligrams per litre with maximum waste loading between 150,000 and 250,000 tonnes per hectare. 2. Half-lives may be used in considering a decrease in source concentration with time and for estimating the contaminating life span. O. Reg. 232/98, Table 1. TABLE 2   MAXIMUM WASTE LOADINGS FOR GENERIC DESIGN OPTIONS (Section 10) Background Chloride Concentration (mg/L)   Column 1 Maximum Waste Loading (m3/ha) - Single Liner Design Option (Subsection 10 (4))   Column 2 Maximum Waste Loading (m3/ha) - Double Liner Design Option (Subsection 10 (5)) 

  0   98,500   287,000 

  10   100,500   295,500 

  20   102,500   299,500 

  30   104,000   303,000 

  40   106,000   307,000 

  50   107,500   310,500 

  60   109,000   314,000 

  70   110,500   317,500 

  80   112,000   321,500 

  90   113,500   325,000 

  100   115,000   328,500 

  110   117,000   332,000 

  120   118,500   335,500 

  130   120,000   339,000 

  140   121,500   343,000 

  150   123,500   346,500 

  160   125,000   350,000 

  170   126,500   353,500 

  180   128,000   357,000 

  190   129,500   360,500 

  200   131,000   363,500 

  210   132,500   366,500 

  220   134,500   370,000 

  230   136,000   373,000 

  240   137,500   376,000 

  250 or more   139,000   380,000  Note:  If the Background Chloride Concentration falls between two values in Table 2, the appropriate limiting value shall be interpolated from the values in Column 1 or 2, whichever applies.  These values are considered to vary linearly with the values for chloride. O. Reg. 232/98, Table 2. Schedule 1   SERVICE LIVES — PRIMARY LEACHATE COLLECTION SYSTEMS (Sections 6 and 10) 100-Year Service Life

1. A landfilling site’s primary leachate collection system, consisting of perforated collection pipes bedded in a layer of stones with a separating layer above and below the stones, may be assumed to have a service life of 100 years, starting at the earlier of the mid-point of the site’s operating life and the tenth anniversary of the first deposit of waste in the waste fill zone, if the following conditions are met: 1. The pipes must be bedded in a continuous layer of stones that extends completely across the base of the waste fill zone and that has a minimum thickness of 0.3 metres on the base side slopes and a minimum thickness of 0.5 metres elsewhere.  The stones must have a D85 of not less than 37 millimetres, a D10 of not less than 19 millimetres, a uniformity coefficient (D60/D10) of less than 2.0, and, when measured by weight, not more than 1.0 per cent of the stones may pass the US #200 sieve. 2. A suitable geotextile or graded granular separator must be installed between the stone layer and the overlying waste and between the stone layer and any underlying soil or liner. 3. The perforated leachate collection pipes must be made of high density polyethylene (HDPE), with a minimum internal diameter of 150 millimetres and with perforations not less than 12 millimetres in diameter located along and around the pipes so that, i. the hydraulic capacity of the perforations can readily accommodate the expected quantity of leachate, ii. leachate that enters the pipes can readily flow within the pipes, iii. blockage by sedimentation is minimized, and iv. the structural integrity of the pipes is maintained. 4. The perforated leachate collection pipes must be bedded in the stones so that there is at least 250 millimetres of stones above the pipes and at least 50 millimetres of stones below the pipes. 5. The perforated leachate collection pipes must be placed across the base of the waste fill zone, excluding the base side slopes, and spaced so that the drainage path before leachate can potentially intercept a collection pipe is not more than 50 metres in length. 6. The leachate collection pipes must have adequate structural integrity to withstand impacts from waste placement and other site operations and to withstand the weight of the waste, cover material and any structures that may be located over them. 7. Leachate collection pipes must be inspected at least annually for the first five years after placement of waste overtop of each pipe and then as often as future inspections indicate to be necessary. 8. Leachate collection pipes must be cleaned whenever an inspection indicates that cleaning is necessary. 9. Leachate must be removed from the collection system in order to avoid obstructions to leachate flows within the system. 10. The base of the waste fill zone must be contoured to provide minimum surface grades of 0.5 per cent toward the leachate collection pipes. 11. Sludge must not be deposited in the waste fill zone in a manner that would allow sludge to move into the leachate collection system and promote biological clogging. 75-Year Service Life