SR 06:208 - Laserfiche WebLink

carries urban pollutants. which create water-quality problems in downstream water bodies and which. in turn. impact aquatic life and the overall ecosystem health. Because the Federal Cleall If/ateI' Ad requires municipalities to implement stormwater management programs. the City prepared the Phase I Storm Water Program in 1989 and Phase 1I prol'ram in 2001. To protect water quality municipalities - under new established rules - must obtain a National Pollution Discharve Elimination System (NPDES) permit for developing and implementinv a stonnwatcr rnanagctncnt program. The stormwatcr managclncnt program must include the following "control measures" for reducing the quantity of pollutants that stormwater picks up and carries into the stormwater system: Public Education and Outreach Public Participation/Involvement. Illicit Discharge Detection and Elimination. Constnlction Site Runoff Control. Post-Constnlction Runoff Control. and Pollution Prevention / Good Housekeeping. 'l1,ese control-measure programs tarvet reducing stonnwater pollution in storm-drain systems and creeks. which eventually flow into water bodies including the San Francisco Bay. To implement Phase I and II rules under the Cleall If/ateI' Ad. Alameda County established a county-wide water program to guide cities in establishing "control measure" programs. The City of Pleasanton actively participates in this prol'ram and has joined other Bay Area communities in implementing the clean water nmoff permit provisions. 'l1,e City recognizes that new stormwater quality controls and development requirements may add cost to development projects and business operations. '111erefore. as development occurs. Pleasanton is attempting to balance the obiectives of meeting clean-water program mandates utilizinl' biolol'ical methods - such as vCRctatcd swales and bia-retention ponds - along with cncounllnnp- cconolnic development and business retention. See the Public Facilities Element discussion of stormwater drainage and flood control facilities along with related policies and programs. As discussed therein. Zone Ts Stream Malla~C1IJCllt Master l'/all would mitigate flooding impacts due to stormwater nll1off. Plan implementation would increase the watercourse carr.yin!' capacity in the Tri Valley and provide additional stonnwater storage in the Chain of l.akes. See also Chain of I.akes discussion under Sand and Gravel below. Sand and Gravel .\bout 2,700 "ere.l of land ar~ dejign"ted on The General Plan l\1ap designates about 1.600 acres of regionally significant sand and Vravel deposits in the eastern Planning Area for Sand and Gravel Harvesting. 'Il,is land generally lies east of Martin A venuc lint! nerth of the .\ne) 0 Del ','"ll;;, west of Isabel Avenue and north of Vineyard Avenue. 'l1,e Planning Area contains the largest single concentration of sand and gravel deposits in the entire Bay Area. Large sand and gravel harvestin!' companies own most of this land. Alameda County has granted Vulcan Materials Company and CEMEX pemuts entitling them to extract sand and gravel deposits. Over half of this land within the Con ().') }'Jl'fTlt'Tlt, 0: OH2<)(16, fl'uhnc VII-12