The hillside residence in Deer Park, California had a stormwater management and NPDES requirement that was met by installing a RainSpace Water Storage Chamber. This is a very environmentally sensitive area in the Napa Valley wine country. The system was designed so the captured stormwater could be reused for onsite irrigation and water availability back-up in this drought and fire prone area. The challenging site was heavily treed with multiple slopes. Two RainSpace Water Storage chambers were easily installed on a downhill slope for an economical and useful solution for the regulatory requirements and the owner’s particular needs.