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SAN JOAQUIN COUNTY September 14,2006 COMMUNITY DEVELOPMENT DEPARTMENT 1810 East Hazelton Avenue Stockton,CA 95205 To whom it may concern, Our concern on the MAJOR SUBDIVISION NO.PA-0600432 OF PLYMOUTH OAKS LLC(C/O WONG ENGINEERS).The project is located on the east side of Plymouth Road, 120 feet north of Del Rio Drive,west Stockton (Supervisorial District 1,Supervisor contacted about our concerns). Final condominium pad elevation 2,25 feet(approximately 27 inches) Drainage away from condominium unit elevation —1.67 foot(approximately 20 inches) Existing property elevation south - .08(less than one inch) The developer has added more landfill to their sight;bring the new sight higher than the adjoining South properties.We understand this was for the sewer line regulations and the storm drainage control,and to direct them to the center of the new project. Our concern is the final grade level(with fill dirt)of the new project in perspective to our properties to the south of the development for the storm run off and how will the storm run off be addressed between the rear of the two properties.Developer David Strobel has informed us that a retaining wall would be about three feet from our existing fences,a retaining wall 8-inches to 16-inches high would be built with cement or cement block,he wasn't sure yet.Max Gallegos told us there is a retaining wall that is going to be built next to the existing rear fence lines. The new sanitary maintenance holes are built on the existing fence line(picture enclosed).The existing property owners to the south of the project, clean outs and connection to the main county sewer line that runs to the west are located outside of their existing fence lines 3]-inches from existing fences in the Public utility easement area(enclosed pictures).Mr.Callahan from the county development department informed us today(9-14-06) that the retaining wall is planned to be built on top of our clean outs and that if we had a problem we would just have to dig them out.As far as drainage problems in the future and water flooding our back yards,he answer was"and a meteor could hit us right now." If the 8-inch to 16-inch retaining wall were to be built three feet from the existing fence lines,it would place the retaining wall on top of the sanitary maintenance hole and just miss the existing property sewer connections,leaving very little room for maintenance workers. 1. Build the retaining wall higher then the final grade level with fill dirt(which is to be 2.25feet above existing property.08).The final grade level with developer fill dirt is higher than 8 to 16 inches,even the proposed drainage level away from the new condominium is higher than 8 to 16 inches high.And storm water will run to the back of the property and over the retaining wall if the retaining wall is built lower than final grade level(there is only approximately 2 inches from the 16-inch retaining wall to the second grade level 1.67-foot.The new occupant could fill the proposed drainage area in the back in no time with planting soil for planting.The side of the property will drain to the front street but the back will be going over the 8 to 16 inch retaining wall and into existing back yards,because the retaining wall will be to low to hold storm run off the back and also normal back yard watering would run over the retaining wall. 2. The county approved storm drainage,as we were told by Mike Callahan is to have the 2nd elevation dirt 1.67 ft(20 inches)flow in a downward direction,making a dirt ditch below the 8 to 16 inch retaining wall on the south side of the property. Then carried to the outer sides of the property redirected by dirt ditches to the center of the project were the storm drains are located.In the future this approved plan is not going to be a positive drain flow.We would like the retaining wall built on the new project property line,to have enough room for public unity access to existing property county sewer connections. 3. The area between the existing property fence lines and the new retaining wall should be wide enough to handle storm water run off and direct it to the west of the property to Plymouth Road storm drains.We were told the retaining wall on the East side of the project naming North to South would run the full length of the property line next to John Tyler School.The retaining wall to the south running East to West might not be going the full length of the property(East to West on the South side),the storm nun off will surely run South then West down in between retaining wall and the existing fences on the South side of the project.What is in place to direct the Storm run off,if this is going to be developed this way? We would like this to be addressed. 4. The retaining wall is going to create a dam affect,in an area that in the past water could drain off in any direction.We would like this area to be revaluated for storm water drainage into the existing back yards. With the area's water drainage being redirected because the new development,has changed the storm water drainage,we are concerned it will flow into existing back yards to the south of the project,Can a positive drainage flow be done to have it flow to the Plymouth Road storm drains to the West? 5. Would Mr.Strobel,comment to us the height and length of the retaining walls and were on the easement he intends to build the retaining walls. Some of the dirt has been displaced in the easement areas,this ground is no longer level and will cause standing water,we would like this addressed so there is a positive drainage flow away from existing properties. FRANK AND PATRICIA HOSE 2523 DEL RIO DRIVE STOCKTON,CA 95204 209-462-3278 CC:KERRY SULLIVAN, DIRECTOR CC:TOM GAU, CHIEF DEPUTY DIRECTOR CC:STEVE GUTIERREZ, SUPERVISOR DISTRICT 1