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r Additional Monitoring Wells At least two or more monitoring wells are proposed to locate the perimeter of the plume in addition to the one in Weber Street which will be identified as MW 7. See Plate No. 4. Mw 7 would be drilled 30 to 50 feet east of the spill site to determine the direction and distance traveled by the plume. More than one drill hole may be required to accomplish this. if no contamination is found 30 to 50 feet east, no additional boring would be planned in this area. MW 8 would be drilled southwest of the spili area to confirm if ground water slopes toward California Canners s Growers and to locate edge of plume in the westerly direction. The City of Stockton has .indicated it will not permit any discharge to the sewer due to lack of trunk line and treatment plant capacity. The proposed discharge will be to surface storm - drain. This will require a surface discharge permit. City DrainaSe System The east area of Stockton and the Teichert site drain to McLeod Lake and to the Stockton Deep Water Channel. See Plate No. 7. The Teichert site drains to a drain inlet at `he intersection of Weber Street and 'D' Street which is within. 100 feet of the contaminated zone. An 18" pipeline flows north through Teichert and the extension of "D" to Fremont Street. At Fremont Street it connects to a 48" pipeline which changes to a 54' pipeline at Wilson Way and .finally connects to a 72" pipeline ' draining to ,McLeod Lake. The drainage area upstream of Teichert's site at Weber and "D" Streets is approximately 50t acres and consists generally of housing with some light. industrial. A typical runoff for this area for storm drain design would be 10 cu. ft./sec. During the summer months the only runoff available would pe from lawn irrigation, washing driveways, etc. A typical summer flow may be between. 0.1 & 0,5 cu.ft./sec. or 45 to 225 gal./min. Assuming the stripping tower discharge rate at 15 gal./min. maximum, the dilution rate would be ?:1 minimum and 15:1 maximum in the summer. The dilution rate in winter would be much greater.