SU0011354 SSNL - Laserfiche WebLink

Home Browse Search

TABLE 1 Year/ JAN FED MAR APR MAY JUN JUL AUG SEP OCT NOV DEC CALC.TOTALS Month 2012 2013 2 5 1 5 3 N/A 2014 7 32 44 55 45 60 70 53 46 51 44 50 557 CCF:748 pis= 416,636 gpy+362 dpy=1,151 gpd 2015 48 41 46 49 48 50 69 57 60 52 53 57 630 CCF a 748 g 1,= 471,240 gpy-362 dpy=1,302 gpd 2016 52 41 54 61 54 r54 73 86 68 53 36 54 686 CCF r 748 gals 513,128 gpy +362 dpy=1,417 'Pd The total yearly gallons (gpy)will be divided by 362 since the restaurant is closed approximately three days out of the year and only operates from 5AM to 2PM daily. To arrive at the most accurate water usage in gallons per day(gpd - also known as the Average Daily Flow ADF), for engineering discussions and calculations found in Section III, an average effluent gpd value will be calculated as an average between the years 2015 and 2016 as illustrated in Table 1. During this time frame the Restaurant operated full-time. The calculated ADF = 1,302 + 1,417=2 = 1360 gpd. B. ARCO Service Station /Convenience Store Influent volumes from the ARCO facility will flow from fixture units as denoted on the attached Fixture Unit Description Chart. These include toilets, sinks, coffee machines, beverage machines and floor drains for refrigeration condensate. Influent characteristics are a combination of blackwater, graywater and clear water condensate. The percentages of these sources contributing to the total volume of waste water influent are unknown and unpredictable. Although certain publications estimate wastewater flows based upon fixture units (e.g., California Plumbing Code - CPC), it is virtually impossible to accurately determine flow volumes based on fixture units. The CPC assigns 1,000 gallons per day for service stations with one bay(for mechanical work) and an additional 500 gpd for an additional bay. The proposed ARCO Station will have no mechanic's bay. The San Joaquin County EHD Sewage Standards assign 10 gallons per vehicle. However,there is no method to determine the number of daily vehicles once this facility is operational and at 10 gallons/vehicle, the daily flow volume projections would be astronomical. Therefore, an average daily flow(ADF) for the ARCO facility will be derived pragmatically under worst-case scenario conditions. The highest wastewater flows will originate from the two toilets and two lavatories. A value of 1.6 gallons per flush and 0.5 gallons for hand washing for an approximate 2.0 gallons is assigned for each use. If the two restrooms are used under maximum conceivable conditions of every 15 minutes,the ADF =2.0 gals x 4x/hr x 24 hrs/day x 3 restrooms = 576 gpd. Factoring in remaining flows from the other fixtures, such as refrigeration condensation and ice machines of approximately 424 gallons, a value of 1,000 gallons per day of effluent volume originating from the ARCO Service Station/Convenience Store is derived,thus correlating with the CPC value. This value will also be used for filter bed design purposes. Page 3 of 8 Chesney Consulting