SU0006059 SSNL - Laserfiche WebLink

Home Browse Search

Comparable Septic Tank Effluent Chemistry In an effort to qualitatively and quantitatively analyze constituent concentrations for use in nitrate loading analysis for the St. Bernard's Church Complex, septic tank effluent from three different Churches with on-site septic systems were sampled. These three Churches represent different septic system design installations, operations, and areas of San Joaquin County. The following Tables illustrate the relative differences among the three Churches sampled. TABLE 9 Stockton Baptist St.Patrick's Catholic Church of Latter-day CHURCH Church Church Saints 5480 North Hwy.99 19399 East Hwy. 120 27150 Wilkinson Way Stockton Escalon Tracy Septic Tanks Four- 1,200 gallon One-2,000? gallon Two -2,000 gallon tanks in series. tank tanks in parallel. Operation Church and Elementary Church,with School Church school. partially using sampled septic tank. Kitchen No Yes Yes Septic Tank Compartment Last compartment of Second compartment First compartment of the Sampled the last tank. second tank. Lid could not be removed from second comp.of second tank. The following Tables summarize the analytical test results of the three sampled Churches. The percentages next to the Ammonia-Nitrogen and Organic Nitrogen concentrations indicate the percent these constituents comprise Total Nitrogen. In addition, concentrations of weak, medium and strong strength wastewaters have also been presented for comparison purposes from Wastewater EneineerinQ, 3'Ed., in the three columns on the right. TABLE 10 Stockton Baptist St.Patrick's Catholic Church of Latter-day wastewater Engineering ANALYTE Church Church Saints Metcalf&Eddy 3rd Ed. 5480 North Hwy.99 19399 East Hwy. 120 27150 Wilkinson Way (Concentrations in mg/L) Stockton Escalon Tracy Weak Medium Strong Ammonia Nitrogen(NH,N) 6.5 mg/L(71%) 147.7 mg/L(82%) 61.1 mg/L(84%) 12 25 50 Organic Nitrogen 2.7 mg/L(29%) 32.3 mg/L(I8%) 11.9 mg/L(16%) 8 15 35 Total Nitrogen 9.2 mg/L 180.0 mg/L 73.0 mg/L 20 40 85 Total Suspended Solids 12 mg/L 452 mg/L 92 mg/L 100 220 350 (TSS) Biochemical Oxygen 8 mg/L 391 mg/L 75 mg/L 110 220 400 Demand(BOD,) PH 1 7.3 1 7.3 8.2 n/a n/a n/a Toral Alkalinity 390 mg/L 864 mg/L 436 mg/L 50 100 200 Page -15- Chesney Consulting