Overall Rating Silver - expired
Overall Score 58.64
Liaison Kelsey Smith
Submission Date March 3, 2017
Executive Letter Download

STARS v2.0

University of the Pacific
OP-27: Rainwater Management

Status Score Responsible Party
Complete 2.00 / 2.00 Scott Heaton
Support Services
"---" indicates that no data was submitted for this field

Does the institution use Low Impact Development (LID) practices as a matter of policy or standard practice to reduce rainwater/stormwater runoff volume and improve outgoing water quality for new construction, major renovation, and other projects?:

A brief description of the institution’s Low Impact Development (LID) practices:

1. Grassy swales
2. Vegetated swales
3. Rock wells

Has the institution adopted a rainwater/stormwater management policy, plan, or strategies that mitigate the rainwater runoff impacts of ongoing campus operations through the use of green infrastructure? :

A brief description of the institution’s rainwater/stormwater management policy, plan, and/or strategies for ongoing campus operations:

California code is extremely stringent on these issues and we exceed code rules in managing storm water and run off.

A brief description of any rainwater harvesting employed by the institution:

Greenhouse Water Usage

Current greenhouse water usage is as follows:

The water system that is in the greenhouse is a homemade watering tree, with 6 half round shrub nozzles installed on the tree. There are two trees one for each room. The values below are for both rooms.

½ round shrub nozzle = 1.3 gpm

1.3 gpm x 12 nozzles = 15.6 gpm

15.6 gpm x 10 min. watering cycle = 156 gallons of water per cycle.

156 gallons x 3 cycles a day = 468 gallons per day.

468 gallons per day x 7 days a week = 3,276 gallons per week.

3,276 gallons per week x 52 weeks per year = 170,352 gallons a year.

If we were to install a water recovery system at the green house we would greatly reduce the water consumption. The values below show how much water could be recovered.

Water recovered from greenhouse coolers = .75 gpm

.75 gpm x 60 min = 45 gallons per hour.

45 gallons x 6 hr. average run time = 270 gallons per day.

270 gallons x 7 days a week = 1,890 gallons per week.

1,890 per week x 52 weeks = 98,280 per year of recovered water.

The average rainfall in Stockton is 14.06 inches per year.

The average size roof collects 600 gallons of water for every inch of rain. When you think about it the greenhouse is not much smaller than your average home. So with the information we should be able to recover 8,436 gallons of water from rain.

14.06 inches per year x 600 gallons an inch = 8,436 gallons per year of recovered rain water.

8,436 gallons per year of recovered rain water. + 98,280 gallons per year of recovered cooler water = 106,716 gallons per year of recovered water.

170,352 gallons per year of current usage.
-106,716 gallons per year of recovered water.
63,636 gallons per year of new current usage. That would be an almost 63% reduction in water usage

Rainwater harvested directly and stored/used by the institution, performance year:

A brief description of any rainwater filtering systems employed by the institution to treat water prior to release:

A brief description of any living or vegetated roofs on campus:

A brief description of any porous (i.e. permeable) paving employed by the institution:

Chambers Technology Center pathways are permeable. Many fire lanes are permeable also.

A brief description of any downspout disconnection employed by the institution:

A brief description of any rain gardens on campus:

Two rain gardens located at the Alumni House.

A brief description of any stormwater retention and/or detention ponds employed by the institution:

Pacific currently has eight retention ponds located in various locations on campus.

A brief description of any bioswales on campus (vegetated, compost or stone):

We have six vegetated swales, DeRosa Center East and West, Biology Bldg, Janssen Lagario Gym, McCaffrey Center and two at the Alumni House.

A brief description of any other rainwater management technologies or strategies employed by the institution:

We use bark, wattle, jule netting, vegation, filter screens and sand bags.

The website URL where information about the institution’s rainwater management initiatives, plan or policy is available:

The information presented here is self-reported. While AASHE staff review portions of all STARS reports and institutions are welcome to seek additional forms of review, the data in STARS reports are not verified by AASHE. If you believe any of this information is erroneous or inconsistent with credit criteria, please review the process for inquiring about the information reported by an institution and complete the Data Inquiry Form.