SU0002397 - Laserfiche WebLink

Home Browse Search

KLEINFELDER maximum seating capacity of 500 was assumed for the proposed Micke Grove Park ® Expansion. ® Micke Grove Park currently has picnic areas and shelters that can accommodate approximately 2,165 people, not including the golf course. According to the San Joaquin County Onsite Wastewater Disposal Standards (page 13 of 25), picnic parks should be considered to have a water use of 5 gallons per person per day. For the purpose of our nitrate loading calculation, we have estimated the maximum • waste/sewage flow per week for the 47-acre Micke Grove Park Expansion area as follows: • (500 person seating capacity x 5 gal/person/day x 7 days/week) = 17,500 gal/week For the purpose of evaluating the nitrate loading calculation for the Micke Grove Park as a whole (208.53 acres), we have estimated the maximum waste/sewage flow per week as follows: (2,665 person seating capacity x 5 gal/person/day x 7 days/week) = 93,275 gal/week 14 3. PRESENT AND PAST USE Currently, the majority of the project site proposed for development is a field with dense weed growth and scattered trees. It is unknown if any structures ever existed on the expansion site. Based on a historical aerial photograph review and a review of USGS maps, it appears that the expansion site contained a grape vineyard for many years, and we saw no evidence that the area had ever been used as a dairy. We 4 know of no other past uses of the site at this time. 4. SEPTIC PERMITS AND PERFORMANCE SJCEHD files were searched to identify septic permits for parcels in the project vicinity. Twenty-six permits were on file — twenty-three for the expansion site and three for parcels located adjacent to or near the expansion site. These permits were obtained for new installations and repairs/additions to existing septic systems and wells. The permitted sewage disposal systems were conventional septic/leach field M systems, with thirteen having seepage pits. A summary of the information obtained from the permits is presented on Plate 3. Copies of the permits are attached. 5. FIELD INVESTIGATION In order to evaluate the subsurface conditions at the project site, on May 9, 2006, one soil profile boring was drilled within the proposed leach field area to a depth of about 25 feet below existing site grade. The boring was drilled using a Simco 2400 truck- 71071.G01/ST06R641 June 15,2006 Copyright 2006 Kleinfelder,Inc. Page 2 of 8