The rates for sanitary sewer service for customers inside the corporate limits of the City shall be as follows; these base monthly rates shall be charged for each month a customer's account is open, regardless of consumption history or actual use during any specific month:
A.
Monthly Base Customer Charges
(1)
Residential
$39.21 per month for each single family residence and duplex (if single account)
$39.21 per month for each unit of a duplex (if two separate accounts)
(2)
Trailer Courts and Apartments (Triplex and above)
$88.21 per month
(3)
Commercial, Churches, Schools and Motels/Hotels
$67.25 per month
B.
Consumptive Charges
In addition to the monthly charges shown above, the following rates shall be charged based on metered water consumed or as otherwise specified:
(1)
Residential
(a)
Monthly consumptive charges for single family and duplex residential customers shall be $6.51 per 100 cubic feet (CCF) multiplied times the customer's average metered water consumed per month during the previous winter season billing periods. For customers on a bi-monthly billing cycle, average consumption shall be calculated using the customer's water meter readings that generally represent the customer's consumption during the months of November through February, or during the months of December through March, depending on the customer's assigned billing cycle. Charges for customers on a monthly billing cycle shall be based on the monthly average of their water consumption during the November through February billing periods. Except as provided below, such charges shall remain constant for a 12-month period and shall be adjusted annually.
(b)
Single family and duplex residential customers who do not have a complete billing cycle water consumption history for the billing periods specified above shall be charged $6.51 per CCF multiplied by the metered water consumed, up to a maximum of 12 CCF per month, until such time as a consumption history is established as specified in (a) above.
(c)
Single family and duplex residential customers with an average water consumption of 1 CCF or less per month during the billing periods specified above, shall be charged $6.51 per CCF multiplied by the metered water consumed, up to a maximum of 12 CCF per month, until such time as a consumption history is established as specified in (a) above.
(d)
Single family and duplex residential customers who do not have a City water service account and for which the City is unable to obtain official billing history from a state of Washington Department of Health approved water system for the billing periods specified above, shall be charged $38.31 per month, which amount represents $6.51 CCF multiplied by the current average residential metered water consumption of 6 CCF per month.
(e)
For any billing period, if the customer's total metered water consumption is zero, the consumptive sewer charge will be $0.
(2)
Commercial, Churches, Schools, Hotels/Motels, Trailer Courts, and Apartments (Triplex and above)
(a)
The sewer consumptive charge shall be based on metered water consumed at the rate of $6.51 per 100 cubic feet.
(3)
The following charges for extra strength sewage shall be in addition to any other charges and shall be as determined by taking samples at intervals approved by the Director of Public Works. The fee shall be imposed on an industry or commercial business when any sample of wastewater discharged from that business during that month exceeds 350 mg/l TSS (total suspended solids) and/or BOD (biochemical oxygen demand). However, if the Volatile Suspended Solids (VSS) portion of the TSS is 100 mg/l or lower, then the surcharge for TSS shall not apply. The high strength fee shall be the greater of:
(a)
For single or intermittent discharges, the sum of the following high strength waste fees calculated for each sample tested during the month that exceeds 350 mg/l TSS and/or BOD:
TSS Fee = TSS (mg/l) – 350 (mg/l) x Flow (mgd) x 8.34 x $0.65 |
BOD Fee = BOD (mg/l) – 350 (mg/l) x Flow (mgd) x 8.34 x $0.47 |
VSS: If the VSS portion of the TSS is 100 mg/l or lower, then surcharges for TSS shall not apply. |
For the calculation above, "Flow (mgd)" means the volume of wastewater discharged during the sample collection period. |
OR: |
(b)
For discharges of longer duration, the high strength waste fee will be based upon the average TSS and/or BOD concentration for all samples tested during that month when either or both averages exceed 350 mg/l.
TSS Fee = TSS (mg/l) – 350 (mg/l) x Flow (mgd) x 8.34 x $0.65 |
BOD Fee = BOD (mg/l) – 350 (mg/l) x Flow (mgd) x 8.34 x $0.47 |
VSS: If the VSS portion of the TSS is 100 mg/l or lower, then surcharges for TSS shall not apply. |
For the calculation above, "Flow (mgd)" means the total volume of wastewater discharged during the month. |
(4)
Subject to City Council approval, the City Manager may recommend modifications to commercial and industrial user charges for businesses that use metered water in excess of 7,500 cubic feet per month. Any such modification shall be based on classification of user and shall reflect the businesses' sewage flow volume as well as the degree of sewage treatment required for that class of business.
(5)
For sewer discharge patterns not accurately predicted by metered water consumption nor captured by the billing periods or calculation methods specified above, the City may calculate the customer's sewer service charges based on past water consumption at the site, water consumption patterns for similar customers, or from customer-provided data. The calculated sewer consumption billing shall be agreed to in writing by the customer and the Director of Public Works. The City shall periodically review on-site water and sewer consumption patterns and business practices for continued accuracy, and retains the right to adjust the calculated sewer billing accordingly.