HomeMy WebLinkAbout1980-01-09; Planning Commission; Resolution 1577. c e 0
I, I1 PLANNING COMMISSION RESOLUTION NO. 1577,
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RESOLUTION OF THE PLANNING COMMISSION OF THE CITY
OF CARLSBAD, CALIFORNIA, APPROVING A SPECIAL USE
PERMIT TO PERMIT DEVELOPMENT OF A FLOOD PROTECTION WALL AND ACCESS ROADWAY RAMP WITHIN THE F-P OVERLAY
ZONE.
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San Marcos County Water District 6
CASE NO. : SUP-4
APPLICANT: La Costa Land Company and
WHEREAS, a verified application for certain property, a
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to-wi t :
A parcel of land lying within the northeast quarter
of Section 30, Township 12 South, Range 3 West,
San Bernardino Meridian, in the County of San Diego, State of California
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by law to consider said request; and 27
December, 1979, hold a duly noticed public hearing as prescrj 26
WHEREAS the Planning Commission did on the 12th day of 25
subsequent actions to approve development of the site. 24
project. Appropriate mitigating measures will be taken on 23
certified by the San Marcos County Water District for this 22
mental impacts, and an environmental impact report has been 21
1 posed change of zone will not cause any substantial environ- 20
has been processed through Environmental Review and the pro- 19
and the State Environmental Quality Act, in that the project 18
City of Carlsbad's Environmental Protection Ordinance of 197, 17
WHEREAS this project complies with the requirements of 16
by Title 21 of the Carlsbad Municipal Code; and 15
WHEREAS, said application constitutes a request as prov: 14
Planning Commission; and 13
has been filed with the City of Carlsbad, and referred to th
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WHEREAS, at said public hearing a staff report was pres1
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Permit were heard; 3
and all persons desiring to speak on the subject Special Use
4 NOW, THEREFORE, BE IT RESOLVED by the Planning Cornissic
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B. After consideration of all evidence presented at the pu: 7
A. That the above recitations are true and correct. 6
of the City of Carlsbad as follows:
hearing, the Planning Commission finds the following fa 8 and reasons to exist:
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Findings
1. The Special Use Permit is consistent with the purposes
of the floodplain overlay zone because the proposed
engineering improvements to the site adequately mitigatl
the flood hazard to the site, and have been made condit
of approval.
l3 2. The City Engineer has found that no increased flood danj
the reinforced concrete wall seems sufficient to protec, 14 is likely due to the construction of the wall. Additio:
the treatment plant from the 100 year flood. 15
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3. The Special Use Permit is consistent with all applicablc specific and general plans because:
A. The use of the site for a wastewater treatment
facility is in conformance with General Plan Land
Use Element designation of public utilities.
B. The proposed engineering improvements to the site
implement the Public Safety Element's goal of
minimizing injury, loss of life and damage to
property resulting from flood disaster.
22 4. The issuance of the Special Use Permit will not adverse: affect or unduly hinder, restrict or alter the water
carrying function of the floodplain because the propose( 23 engineering improvements specifically provide for the si
24 efficient disposal of storm water.
25 policies since the site will be used for a wastewater treatment plant. 26
5. The project is consistent with all public facility
6. The subject application has complied with the requireme]
28 because an Environmental Impact Report has been certific
by the applicant, and San Marcos County Water District.
27 of the City of Carlsbad's Environmental Protection Ordil
PC Reso #1577 Page 2
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C. That the Planning Commission, recommends APPROVAL of SU:
based on the findings and subject to the condition that
all development and erosion protection measures occur substantially as shown on SUP-4, Exhibits A and B, datec November 15, 1979, on file in the Planning Department ai incorporated by reference.
PASSED, APPROVED AND ADOPTED at a regular meeting of thc
Planning Commission of the City of Carlsbad, California, helc
the 9th day of January' , 1980, by the following vote,
to wit: 7
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9 AYES : Larson, Leeds, Marcus, Schick.
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NOES : None.
ABSTAIN : None.
ABSENT : Friestedt, Jose.
23 ATTEST : I1 24
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.,d-cAmSBAD PLAmINXoN 26
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28 PC RES0 #1577 Page 3 .3
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CALIFORNIA REGIONAL WATER QUALITY CONTROL BOARD
SAIJ DIEGO RZGION
ORDER NO. 79-23 -
WASTE DISCHARGE REQbTKEMENTS
FOR
SAN ItMCOS COUNTY LTATER DISTRICT
WASTENATER RECLPJQ'LTION PROJECT
NEAR SAI? MARCOS C€I.EEK
The California Regional Water Quality Contro'l Board, San Diego Region (hereaf
Regional Board), Pinds that:
1'. &Ire James F. McKay, Secretary/General Manager, San Marcos County Water
District (District),submitted an incomplete Report of Waste Discharge da!
December 5, 1978, proposing to treat and dispose of up to 0.6 million
gallons per day (MGD) in a wastewater reclamation project to be located
. southerly of Lake San Marcos and easterly of La Costa in San Diego Count:
hf'ier receipt of additional information requested by Regional Board staf:
the completed Repart of Waste Discharge'was accepted on February 22, l97!
2. The discharger proposes to reactivate and expand their activated sludge
secondary treatment plant located near San Marcos Creek downstrem of Ra?
Santa Fe Road. The plant was taken out of service in 1969 when the Distl
began ocean disposal through the Encina Vater Pollution Control Facility
!The District wishes to reactivate the 'treatment plant to (I) reuse water
that might otherwise be discharged to the ocean, and (2) provide additiol
wastewater treatment and disposal capacity.' Additional t.reatment units 1
be added thus bringing the plant's total capacity to 0.6 MGD of oxidize(
.coagulated, filtered, and disinfected wastewater.
3. The 0.6 biGD of treated wastewzter would be used to irrigate landscaping
crops, and open space. Excess effluent would be disposed of by land app:
cation. Provisions would be made to dispose of up to 0.5 I4GD within the
Rancho La Costa development on 177 acres. It is anticipated that additic
uses would be developed in the San Marcos area to establish a demand for
reaaining 0.1 MGD of treated wastewater.
4. The District proposes to construct a seasonal storage reservoir (175 acre
feet) that would contain the treatment plant's effluent output for 90 day
The reservoir would store effluent during periods when irrigation disposz
could not be used because of inclement weather. The location of the vast
water treatment and storage facilities are shoyn in Attachment No. I.to t
Order.
5. The discharger reports that the sludges produced by the treatment proces:
would be aerobically digested then mechanically dewatered. The processec
sludge would be made available for nearby agricultural or landscaped are2
and surplus digested sludge would be disposed of' at an approved sanitary
landfill. The discharger reports thzt the Encina Joint Powers Regional
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Order No. 79-23 - .2-
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Sewerage 'Agency (JPRSA) is currently stuwing an alternative regional
solids handling program and if carried out, the District's sludge would
be transported to the Encina Vater Pollution Control Facility via sewer.
6. The District proposes to implement the above plans in two major phases.
The first phase would be the reha5ilitation of the existing facilities t
provide 8 treatment capacity of 0.2 MGD. The 175 acre-foot storage rese
voir would be coqleted in this initial phase and a portion of the ird-
gation system with sufficient piping to irrigate 75 acres (0.2 MGD) wit?
Ranc.heros De La Costa development within the Rancho La Costa development
. The next phase would involve expanding the wastewater.treatnent and disI
capacities to 0.6 NGD. The treatment portion of this phase is expected
be operational within nine months after beginning operation of the first
phase; however, the disposal capabilities are expected to be provided ir
increments as the wastewater flows increase. The general locations of -
effluent disposal sites are shokm in Attachment No.11 of this Order.
7. . The District proposes to install a dual water system in.the Rancheros Dl
Costa subdivision; one system would distribute potable water while the '
system would distribute treated wastewater to the estate size lots for
gation of landscaping and crops. The La Costa Land Company, developer,
would (1) irstall the dual distribution system; (2) provide area for wa
water disposal within the subdivision; (3) establish a plan of planting
(4) form an organization to manage and operate the disposal system; and
use conditions, covenants and restrictions to ensure individual homeom
participatfon. Other dual water systems k-ould likely be proposed for c
disposal areas as they are developed.
8. The discharger reports that the full treatment and disposal facilities
provide sewerage service for about.2,400 single faroily dwelling units 2 . level of developaent is expected to take 1.1 years to complete. The 19t
and 1990 wastewater flows are expected to be 0.135 MGD, 0.506-KGD , and
respectively,
9. The District reports that the project is for residential development 0:
and industrial wastewater flows are not expected. The District would :
the use of onsite self-regenerated water softeners and the expected wa
. water total dissolved solids (!XIS) with Colorado River water as the su:
1,100 mg/l. The expected blend of Northern California water in the su:
would lower the effluent's TDS to 850 mg/l..
10. The District supplies potable water to the development area and curren
obtains its water supply from the San Diego County Watkr Authority. 7
water supply is imported Colorado River water and Northern California
At the present tine a blend containing 529 mg/1 TDS is being distribut
however, this blend and hence water quality is subject to change.
11. The discharger reports that the wastewater treatment, transmission, ar
age facilities would be protected against runoff and flooding by loo-:
frequency rainfells and flood flows. The District further reports th:
public would be excluded from the wastewater treatment and storage fa{
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. 12. Mr. Dennis 'O'Leary, -Lowry and Associates, consulting engineer for the
. District, reports that. the vol&e of subsurface flow leaving the disposa
irrigation areas is not expected to cause surface seeps as it moves dom
stream underground. Mr. O'Leary further reported that if the assumption
regarding underflow prove incorrect, cne or more of the following method
would be used to stop surfacing of leachate: (1) revising irrigation
practices in'areas contributing to surface seeps; (2) capturing seepage
and recycling to the reclamation operation; (3) planting phreatophfles R
key locations; (14) capturing seepage for use elsewhere; (5) czpture sees
for use in decorative lakes/evaporation ponds; (6) capturing seepage for
ocean disposal through the Xncina JPRSA system; and (7) capturing seepag
for desalting with product water being used beneficially and waste brine
being discharged to the ocean.
13. The discharger reports that the precise location of the landscaping and
areas would not be known until the subdivisions are designed and approve
As such, the data reviewed in preparation of drafting these waste discha
requirements were not site specific. As ,a result, the Regional Board st
in cooperation with the State and County Zealth Department staffs, will
review and approve the specific disposal sites. The approval of the tre
ment and disposal concept addressed in-these waste discharge requirement
is not approval of specific disposal areas and methods.
14. The District reports that they would accept basic responsibility €or the
wastexater reclanation project inclufiing the ultimate responsibility for
meeting these waste discharge requirements. The day-to-day operation of
irrigation facilities and schedules would be by a separate properly orgaj
entity, which is currently under study. The District would instruct and
supervise the operating organization to ensure that waste discharge viol,
do not occur,
15. .The existing and proposed expansion of the wastewater treatment facilitif
are located in the SB4 of the Neq, Section 30, T12S, R3W, SBBgM. The prc
'. posed effluent storage pond is located in the 1@2 of the Nkk, Section 32,
T12S, R3W, SBB&M. The proposed effluent disposal areas would generally 1
located in Sections 19, 20, 29 and 30, . . T12S, .. R3W, SBB&M. The wastewater
reclamation project is located in an area with no groundhater quality -
objectives in the San Marcos Hydrologic-"kubunit of the Carlsbad Hydrolog:
16. The "Comprehensive \.later Quality Control Plan Report for the San Diego
Region (9)" (Basin Pian), adopted by this Regional Board,on March 17, 19'1
and approved by the State Water Resources Control Board on March 20, 1915
and updated by the Regional Board on February 27, 1978, established the
following objectives for surface and ground waters in the San Marcos HydI
logic Subunit;
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'.Order No. 79-23 ~
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Concentration not to be exceeded
more than 10 percent of the time
Constituent Surface water Groundwater*
Total dissolved solids
Chloride
Percent Sodium
Sulfate
Nitrate
Nitrogen & phosphorus
Iron
Manganese
Methylene blue active substances
Boron
Dissolved owgen
Odor
Turbidity
Color
Fluoride *L
500
250
250
60 '
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98
0.3
0.05
0.5 0.5 *?s+
None
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24" '
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1.0
men
mg/l
mg/l
id1 me/l
mg/l
mg/l
JTU
Units
mgll
1,000 mg/l
400 mg/l
60
10 mg/l
500 mg/l
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0.3 mg/l
O.O5me/l
0.5 mg/l
0.5 mg/l
None
5 JTU 15 Units
1.0 Eg/l
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17. I%e Basin Plan also contains the following prohibitions applicable to tf
proposed' discharge:
11 Discharge of treated or untreated sewage or industrial waste-
water, exclusive of cooling water or other waters which are
chemically unchanged, to a watercourse, is prohibited exc'ept in
cases where the quality of said discharge complies with the
receiving body's water quality 03jcctives.
"Discharging of treated or untreated sewage or industrial wastes
5.n such manner or volume as to cause sustained surface flow or
pond-ing on lands not owned or under the control of the discharger
is prohibited except in cases defined in the previous paragraph
* The groundwater objectives do not apply between IIwy 78 and X1 Cmino Real
** Concentrations of nitrogen and phosphorus, by themselves or in combinatior
with other nutrients, shall be maintained at levels below those which stir
late algae and emergent plant growth. Thresho1.d total phosphorus (P) con-
centrations shall not exceed 0.05 mg/l in any stream at the point where il
enters any standing body of water, nor 0.025 mg/l in any standing body of
water .
***Hinety percent or mo.rc of natural seasona1'minim.m oxygen concentration a1
more than 5.0 mg/l maintained et least 90 percent of the time.
NOTE: JTU = Jackson Turbidity Units mg/1 = milligrams per liter
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and.in czses in which the responsibility for all downstream
adverse effects is accepted by the discharger.
11 The dumping or deposition of oil, garbage, trash or other
solid municipal, industrial or egricultural waste directly '
into inland waters or watercourses or adjacent to the water-
.Icouses in any manner which may pel3lit its being washed into
the watercourse is prohibited.
It Land grading and similar operations causing soil disturbance
'which do not contain provisions to minimize soil erosion and
limit suspended matter in area runoff are prohibited."
18. Surface waters in the San Marcos Hydrologic Subunit are beneficially use(
for:.
(a) Agricultural supply
(b) Water contract recreation
. (c) Nonwater contact recreation
(d) Warm freshwater habitat
(e) Wildlife habitat
. (f) Preservation of rare and endangered species I.
13. Groundwaters in the San Marcos Hydrologic Subunit are beneficially used
for:
(a) Municipal and domestic supply
(b) Agricultural supply
(c) Industrial servtce supply
20, The Sal1 Marcos County Vater District has prepared a find enviromental
(Public Resources Code Section 21000 et seq..) and the State Guidelines.
'impact repor-t in accordance with the California Environmental Quality Act
21. The District has changed or altered the project as follows:
a. Vegetation in the landscaping to receive reclaimed wastewater will
be selected not on1.y for its ornmental value but also for its
high consmptive use and potential for high nutrient removal.
b. The effluent will be secondary treated including coagulation,
filtration, and disinfection to a level safe for irrigation near
residences.
c. Low trajectory sprinklers will be used to guard against the drift
of atomized reclaimed water into neighboring hones.
d. The irrigation rate will be regulated so that there would be no
runoff. As an additional safeguard ag;ain:;t.runoff and seepage,
collection ditches will be placed at the toes of slopes.
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e. Water collected at the toes of slopes will be monitored for
phosphorus and nitrogen concentrations. High concentrations
will call for reapplication of the water to the landscaping;
low concentrations could allow discharge of the water to the
creek. Such monitoring is especially important during the
first rains of the rainy season and as salts are periodically
leached from the soils in the landcaped areas. If necessary,
leachate through an ocean outfall.
. plant capacity trade-offs could be arranged.to discharge
f. There will be a collecti.on ditch below the dam to catch any
seepage from the reservoir. That water would be returned 'to
the reservoir.
g. .The proposed treatment plant design will have back-up systems
to prevent adverse impacts in case of failure. of the main
system.
h. Construction of the reclaimed wastewater irrigation system will
. comply with Title 17 of the California State Adninistrative Code
by including a water master on the job to monitor pipe con-
nections and to prevent cross-connections 'of the reclaimed water
lines with potable water lines.
i. The irrigation system will be maintained and operated by the
San Marcos County Water District under a contractual agreement
that will give them total ass&ance that they will, always have
the ability to discharge the effluent safely and efficiently.
j. The proposed sewage treatment facilities will use aerobic processes
to minimize the potential for odor. A sludge filter press will be
used at the end of the treatment process to minimize the storage
time of sludgz onsite. The sludge handled thkough the filter press
will be transported offsite to a county landfill or to be used on
domestic gardens. Malfunctions in the treatment system resulting
in odors will last in most cases only a few hours and rarely more
than one or two days. Also, there will be enough fluctuation of
the level of water in the reservoir through either irrigation use
or the infusion of rainwater to preven-t odors from occurring at the
reservoir due to. stagnation of the effluent.
22. The chances or alterations of the project mitigate or avoid the adverse
water quality impacts of the project.
23. The Regional Board has considered all environmental factors associated
with the proposed discharge of waste.
24. .The Regiona1,Board has notified the discharger and all known interested
parties of its intent to prescribe waste discharge requirements for the
proposed discharge.
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'.Order No. 79-23 ~ -7-
25. The Regional Board in a public meeting heard and considered all coments
pertaining to the proposed discharge.
IT IS KE33Y C3DE?IED, That the San Marcos County Water District shall conply
with the following waste discharge requirements for the wastewater reclamatic
pro j ect :
A. PROEIEITIOBS
1. Discharges of wastes to lands which have not been specifically
described to the Regional Board'and for which valid waste discharge
requirements are not in force are prohibited.
2. Bypassipg or direct discharge of treated or untrezted liquid or
solid wastes to Sm Marcos Creek or tributaries thereto is prohibit
3. Discharge 'of wastes to runoff impoundment facilities is prohibited.
4. . The wastewater or sludge disposzl operations shall not cause odors
or other,nuis.ances beyond the limits of the treatnent plant site.
5. Disposing of sludge by methods or at locations other than those
described in the Report of Waste Discharge or in the findings of
this Order is prohibited.
6. Discharges of wastes other than d'omestic sewage into the sewer sysi
are prohibited. Discharges of vater softener regeneration brines
into the sewer system are specifically prohibited.
.7. The discharge of wastewater or sludge shall not:
(a)
(b 1
(c 1
(dl
(e)
( f)
(d
(h)
(i)
Cause the presence of coliform or pathogenic organisms
in water pumped from the basin;
Cause the occurrence of objectionable tastes and odors
in waters pumped from the'basin;
Cause k-aters pumped from the basin to foam;
Cause the presence of toxic materials in waters pumped
from the basin;
Cause the -pH of waters pumped from the basin to fall
below 6.0 or rise above 9.0;
Cause this Regional Board's objectives for the ground
or surface waters of the San blarcos Hydrologic Subunit
as established in the Basin Plan to be exceeded;
Cause odors, septicity, mosquitoes or other vectors,
weed growth or other nuisance conditions in San Marcos
Creek or its tributaries;
Cause a surface flow in San Marcos Creek or .its tributaries;
or
Cause.a pollution, contamination or nuisance.
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. Order No. 79-23 -8-
B. DISCILARGE SPECIFICATIONS
1. The monthly average concentration of 5-Day 20' Centigrade biochemi-
cal oqgen demand in the discharge to the irrigation or storage
facilities shall not exceed 30 milligrams per liter (mg/l) as dete:
mined from a 24-hour proportioned-to-flow composite sample. The
daily nzv,imun concentration shall not exceed 45 mg/1 as determined
in any single grab sample or 24-hour composite sample.
2.. .The concentration of suspended solids in the discharge to the irri.
gation or storage facilities shall not exceed 30,=/1 as determine1
from a 2bhour proportioned-to-flow composite sample. The daily
. maximum concentration shall not exceed 45 rngI1:a.s determined in an,
sin.gle grab sample or 24-hour composite sample.
3. The storage' ponds shall be so managed that a dissolved oxygen con-
cenl;rati.cn of not less than 2.0 mg/l is maintained in them at all
tines.
4'. Wastes, including windblown spray, shall be strictly confined to t
lands specifically designated for the.disposa1 operation and i.rri-
gation practices so mznaged that runoff of effluent frcm the.irrig
areas does not occur at any time.
5. Concentrations of mineral constituents in the discharges from the
wastewater treatment plant shall not exceed the following:
Increment over
Constituent water supply% -
Total dissolved solids 400 mg/l
Chloride 200 mg/l
Sulfaie 100 mg/l
Sodixm 200 mgjl
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"This requirement is based on quarterly analysis of the
water ' supply.
6. Effluent used for irrigation on the individual residential lots s
at all times conform with the provisions of Section 60303 of Tit1
Division 4, of the California Administrative Code in their presen
form or as they may be amended.
7. Effluent used for irrigation of landscaping shall at all times.cc
fonn with the provisions of Section 60313 of Title 22, Division 1
the Californiz Administrative Code in their present form or as tl
may be amended.
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* . Order No. 79-23 -9-
8. Effluent used for irrigat'ion of food crops shall at all times con-
form with the proirisions of Article 2, Title 22, Division 4 , of
the California Administrative Code in their present form os as they
may be mended.
9. Effluent used in recreational impoundments shall at all times con-
form with the provisions of Article 5, Title 22, Division 4, of the
. California Rhinistrative Code in their present form or as they may
be amended. ..
10; Smpling of effluent shall at least be conducted as specified in
Article 6, Title 22, Division 4, of the California Administrative
Code in its present form or as it may be amended.
11. .Adequate storage facilities shall be provided to contain the efflue
during and after periods of rainfall when disposal by irrigation
cannot be successfully practiced.
12. All waste treatment, containment and disposal facilities (includine
. storage ponds with the exception of irrigati.on areas, shall be pro-
tected against 100:year peak stre& flows as defined by the San Die
County flood control agency.
13.
14.
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16.
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18.
All waste treatment, containment and disposal facilities (includinc
storage ponds, with the exception of irrigation areas, shall be prc
tected against erosion, overland runoff and other impacts 1'esulting
from a 100-year frequency 24-hour storm.
Concentrations of radioactivity in the discharge above background .
level shall not exceed those specified in the California Administr:
Code, Title 17, Section 30355, Table 11, Colm 2. Background levc
is defined as the activity in the potable water.supply of the San b
.County Water District.
The annual application to land of cadmium from sludge shall not ex( 0.5 kilograms per hectare (0.232 kilograms per acre).
The wastewater reclanation facility shall meet the design and reli-
ability requirements of Articles 7, 8, 9 and 10 of the California
Administrative Code, Title 22. An engineering report conforming tc
Section 30323, Article 7, shall be developed.
Pursuant to requirements of the State Health Department, the San &I:
County Water District shall establish rules and regulations governi
the design and operation of facilities using reclaimed wastewater.
Irrigation practices and regulation of the storage ponds and any
emergency holding facilities shall be the immediate and direct res]
bility of the San Marcos County Water District at all times.
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Order 79-23 -10-
19. The San Plarcos County Water District shall not deliver treated or
untreated wast,ewater for discharge to those users who, by reason
their transpcrting, using, storing, etc. practices, cause nuisancj
associated with wastewater or otherwise contribu-te to the violatic
of the requirements of this Order.
C. PROVISIONS
1. The discharger shall conply with Xonitoring and Reporting Program
No. 79-23 as specified by the Executive Officer. Unless othemisl
specified, the Monitoring and Reporting Program shall be 5.n effec.
upon initiation of the discharge from the facility. In accord wil
the provisions of Section 13267(6) of the Water Code, the monitorj
reports shall be submitted under penalty 'of perjury.
2. Wastewater treatment and disposal facilities shall be completely (
structed and operable prior to the initiation of the discharge anc
the facilities shall initially have adequate capacity for the des:
flow of 0.2 I.:GD. A report from the design engineer certifying 4
adequacy of ezch component of the treatment and disposal facil-itic
. shall be subp2tted by the discharger prior to conmencement of the
discharge. !P"e certification report shall contain a requirement-k
requirement azalysis, based on acceptable engineering practi.ces , c
how the process and physical designs of the facilities will ensure
compliance with the waste discharge requirements. The certificati
report shall zlsc contain the design details of the proposed efflv
disposal- are23 and the details o,f how the District's continued use
of the disposzl and storage ereas is guaranteed. The design engir
shall affix hls signature and engineering license number to the ce
fication report and should submit it prior to construction of the
facilities. The discharge shall not be initiated until:
(a) The certificetion report is received;
(b) The Regional Board has been notified of the completion
of facilities by the discharger;
(c) An inspection of the facilities has been made by staff
of the Regional Board; and
(d) Staff has notified the discharger by letter that the
discharge can be initiated.
3. Prior to the t.-astewater flow through the treatment and disposal
facilities exceeding the esta3lished capacities, the District shal:
comply with Provisions of No. 2 above to gain approval for any
additional treatment and disposal facilities. ,.
4. The discharger's wastewater treatment plant shall be supervised an(
operated by persons possessing certificates of appropriate grade
pursuant to Chepter 3, Subchepter 14, Title 23, California Administ
Code.
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. Order No. 79-23 -11-
5. The discharger shall notif'y this Regional Board, by.letter, of
the commencement -of the discharge.
6. !Fhe discharger shall grant admission to the premises of the waste
treatment and disposal facilities to members of this Regional
Board and its staff at such times as nay be necessary in the COR-
duct of their duties in ccnnection with the waste discharge requirl
, ments established herein.
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7. Waste discharge requirements shall remain applicable regardless of .. changes in ownership or lessee. A change in ownership shall be
reported pronptly to this Regional Board by letter.
8. The engineering report required by Discharge Specification 16 shal. . be submitted to the Regional Board, State Health Department, and
San Diego County Health Depa-tment. The discharge shall not be
initiated until the engineering report is received and accepted by
the Executive Officer of the Regional Board.
9. . The rules and regulations required by Discharge.Specification 17
shall be submltted.to the Regional Board, State Xealth Department,
and San Diego.County Health Department. The discharge shall not b
initiated until the rules and regulations are received and accepte
by the Executive Oi'ficer of the Regional Board.
10. The above-prescribed waste discharge requirements are established
only for (a) a waste disposal-operation as described in the Report
of Waste Discharge and in the findings of this Order, and (b) a
waste discharge volume not in excess of 0.6 XGD.
ll. Prior to initiating discharges of wastes from the San Marcos Count .. Water District's facilities at locations other khan those provided
for by this Order or prior to initiating any material chmge in
characteristics or vol.me of discharge, the discharger shall (a> S
mit 12 copies of a supplementary Report of Waste Discharge, comple
with filing fee, describing the proposed changes , and (b) obtain w
discharge requirements for the proposed changes.
12. This Order is rescinded on March 26, 1984. If the discharger wish
.. to continue -the. discharge after that, an application for new waste
discharge requirements nust be submitted by January 1, 1984.
13. If cons-truction of the facilities described in the Report; of Waste
Discharge has not begun by March 26, 1980, this Order will expire
that date. Should the discharger wish to exkend the expiration da
of this Order, a written request must be submitted to the Executiv
Officer no later than January 1, 1980.
Should the discharger wish to initiate the project following the
expiration of this Order, 12 copies of a new Report of Waste Disch
complete with filing fee must be filed.
I. 0 e
Order NO. 79-23 -12-
14. A copy of these requirements shall be posted at a prominent locatic
at or near the treatment/disposal facilities.
Attachments I and 11
I, Leonard Burtman, Executive Officer, dn hereby cez.tify the foregoing is a
tme, and correct copy of an Order adopted by the California Regional Water
. Control Board, San Diego Region, on March 26, 1979.
.. Executive officer
..
om2 110, 79-25
-<<" - ".. . .- -. . --.;';..d;p':4 - -:. ._ we
.. - ., ._ I .. - i. -1 -. _-. . r- \ AllAU
..
~I a e.
CALIFOR” REGIONAL IJATEK QUALITY CONTROL BOARD
SAN DIEGO REGION
MONITORING AND REPORTING PROGRAM NO. 79-23
FOR
SAN NARCOS COUNTY WATER DISTRICT
WASTEWATER RECL&!ATION PROJECT
NEAR SAN FltlRCOS CREEK
GENEFtAL PROVISIONS FOR SAMPLING AND ANUYSIS
Unless otherwise noted, all sampling, sample preservation, and analyses shal:
be conducted in accordance with the current edition of “Guidelines Establish:
. Test Procedures for Analysis of Pollutants,1f promulgated by the United Stater
Environmental Protection Agency, or approved by the Executive Officer.
All analyses shall be performed in a laboratory certifi.ed to perform such
analyses by the California Department of Health or a laboratory approved by
the Executive Officer.
With the exception of those for well water analyses, samples shall be 24-hou.
proportioned-to-flow composite samples unless otherwise specified. All grab
samples shall be representative of the waste -discharge under the conditions
of De& load.
GENERAL PROVISIOXS FOR UPOilTING
For every item where the’requirements are not met, the discharger shall subm
a statement of the actions undertaken or proposed which will bring the disch
into full compliance with requirements at the earliest tine and submit a tim
table for correction o
By January 30 of each year, the discharger shall submit an annual summary re
to the Regional Board, The report shall contain both tabular and graphical
summaries of the monitoring data obtained during the previous year. In addi
the discharger shall discuss the compliance record and the corrective action
taken or planned which may be needed to bring the discharge into full compli,
- ,
’ with the waste discharge requirements.
The di.scharger shall file a written report within 90 days after the average
weatllcr flow, for any month, equals or exceeds 70 percent of the design capa
of the waste treatment or’. disposal facilities. The report shall contain a
schedule for stuclics, design, and other steps needed to provide additional c
or limit the flow below the design capacity prior to the time’ when the waste
rate equals the capacity of the present units.
MONITORING PROGRAN
The discharger shall submit technical reports concerning the quantity and qu
of . the discharge, using the attached format, in accordance with the followi
schedule.
..
a' Monitoring and Reporting
Program NO. 7.9-23 - -2- m ..
A. Effluent
1. Effluent examination shall be conducted for the following items at
frequency shown, and reported at monthly intervals:
Determination Unit Frequency
5-day 20 Centigrade biochemical , mg/l
Suspended solids - Total md 1
Suspended solids - Volatile . mg/l
Total dissolved solids mg/l - Chloride 41
Sulfate mg/l Sodium mg/l Fluoride mg/1 Boron . mg/l
Synthetic detergents mg/l Dissolved oxygen2 .*. mgll
Percent sodiyn ,-
Coliforms* MPN/100 ml .
Settleable solids* ml/l
Turbidity JTU
0
oxygen demand
Weekly
Weekly
Weekly
Monthly
Monthly
.Monthly
Monthly
Monthly
Monthly
Monthly
Daily
Plonthly * *cJ; ' **
2. A daily log of the volume of water discharged through the irrigatic
systems and the areas irrigated shall be reported monthly.
3. Volume of effI.uent flow from the treatment plant shall be.measured
recorded continuously. Volume of flow for each day shall be report
to the Regional Board monthly.
B. ~ Storage Facilities
When the storage facilities are in'use, dissolved oxygen concentrations
shall be determined at least daily on grab samples taken at the surface
and bottom, not later than 8:OO a.m., and reported monthly to the Regio
Board. The samples ,shall be collected from the deepest portion of the
storage facilities.
* Grab sample.
** Sampling frequency shall be in accord with Section 60321 of Article 6 of
State Department of Health's "Wastewater Reclamation Criteria'' in its pre
form or as it may be amended.
Note: mg/1 = milligrams per liter ml/l = milliliters per liter
MPN/100 nrl. = hfost Probable Number . JTU = Jackson Turbidity Units
per 100 milliliters
I
c .I. .. m e
. Monitoring and Reporting
Program No. 79-23
-3-
C. Potab1.e Supply Waters
Examination of the potable water supplied to the service area of the
wastewater treatment facilities shall be conducted for the follawing .
items quart.erly with the results reported quarterly;
..
Cons ti tuent Unit
Total dissolved solids mg/l . '
Chloride mg/l
Sulfate mg/l
Sodiun ms/ 1
D. Sludge
a
1. Sludge examinations shall be conducted for the following items semi
. annually with the results reported semiannually:
-.
Determination * Unit
Cyanide
Arsenic
Cadmium
Chromium, Hexavalent
Copper
Lead
Mercury
Nickel
Silver
Zinc
Phenolic compounds
mg/kg
%/kg
mdkg
mdkg
mg/kg
mglkg
mdkg
%/kg
mdkg
mg/kg
mdkg
2. A daily log of the quantity of sludge hauled for disposal and the
point of disposal shall be submitted to this Regional Roard quarter
The report' shall contain the cadmium loading rate to land from the
sludge disposal operations.
Ordered by &czd&&zz- ' Leonard Bwltmmz
Executive Officer March 26, 1979
Note: mg/kg = milligrams per kilograms * Grab samples
RDR : mew : hmd
,!Ye 8.
L.6. .o @aQ,4;k I i2.e,744/- .- Ok .(..,., J+/ I/ cT .< a-
JsTATE BOARD SYSTEM ., ' /" I "
' ...- , , * ;-. ?' 5 ,- "' (;,' .' 2, :l+,.. ( Ui," f : j i :';' L:
-..--. Eh.0 f.2)
\
I
EXPLANATION -
1" -
'. """
DRAINAGE PROVINZE RCUrlDARY
HYDROGRAPHIC UNIT BOUNDARY'
HYDROGRAPHIC SUBUrJIJ BOUNDARY
HYDROGRAPHIC SURAREA ROUEdDARY
.- I. -. I u ',
.... TABLE 2-2
EXISTING AND POTENTIAL
NEFICIAL USES OF GROUNDWATER
- -7" 1
ydrogrrphic Subunit 1.1 1 r'? :*.33=
!O- L.\clly qF;7k,-ld - ",p-F"-
k&ELfl-K S.\n ?,laten
s.\~~,clcncr.t~ "- ~b- bn -oL\*Lr r
l a. Ysirfora
to oc.!.L:c
IO h!t.rricla' :o .4ulri
50
-1 r>c<.tlan2a 50 %on
" !O Pvilli Lo,~ml
- "
!O , --_.-I - S,>-n-Eie&tc> a I - "
10 1 p.lr.l<!i;C I
6gwc.r S:\l.~t~,alcr .- e !e," _. 0
?..!_? .P- -0 lt~rr Swzclw~:cr ?I?::-- - -"I-" " - " -" - - -. ;: i :;ru.:l.\qo
IO I ll*ll?.u,la
'0- ' Tia Ju.xn.1
.& "
&%o '0
-. I - 21 x-,.?" SL '2 ?. -JL? "f-1"
Ll-lli;z I .,:e
*:;rr.n,"oG.l
. - . -. . -. . - -
1 c<,rrcrtt - % .- I;l'tr .A" L". 2 ,o
I'I _c -
!O"_ Ill ' Slc*mtt:ynt -?-.E - I -
--Pi? - o_
0..1 p_ - - - ". cp I a- 0
"" "." >:.tren,t
'u Z.Lntvron
0
~-c~l~r"~~To q"Jj-f -1 1 : LI"1
0 - E\i.tinv lt.nvlic.1al U~CI
0 - I'ulvnluJI hvncfhrirl u;rs
% - t:rtrti?r hrnvflrial u\*,'btat \\.~tt.r qamalttv
debru nt.1 n,vrt l'rsl, .._ ,'*,r *~~uni~o~,.tl .nc1
eitlhvr .tgri,.ultural irricrtttln ... lt\...ttbcL
%alvr\ng.
.. 0 ,'
- a/ ,The beneficial uses do not apply " to I
- hydrorrapkic subarea 1.13 on the coastal side of 1:nrerstatc Hic,hway 5. 'The
benefi.ci.al uses for tl~e remainder of
hyc1rographi.c subunit 1.10 are as shown.
- -
" b/ The beneficial. uses do not apply westerly
of the eascerly boundary of the right-cf- .
wav of Interstate Ilir_ltwav 5. The I
.- I.
2- __ beneficial uses for the remainder of the
hydrographic subunit are as shown. .' I
- c/ The beneEici.al uses' do not apply to
hydrographic subareas 4.51 and 4.52 between Highway 78 and El Carnino Real
............ and - to - "... n1.l . lands which drain to >loonlight "
...._""I _""
C:!,(*d-.Ir.. 'itif.! ...................... hcnr!f:i.ci.:~l. ~lscs . for ... the
K(.:;'~::+ ji:~it~~: .:; l' I..~I<: ~!,.~!~~~!~~~~~~I~~~I~~ ... .... :<\111\1nit. . :Ire
as . shown ...
.... _.. .__...." .....-... "..."
".".___.." _... ........................... ......_....... I" -.-.-_-. "". .-""
- d/ The beneficial uses do not ap& to all . 1
lands whi.ch drain to Los Penasquitos I
Ca'nyon from 1.5 miles west of Interstate j
Kighway -. 5. The beneficial uses for the I remainder of the hydrographic subunit are i
as shown.
-. e/ The beneficial uses do not apply west of * -.
Iilterstate Mip,tlrJay 15. The beneficial
uses fpr the remainder of the hydrographic . .
subunit are as shown.
f/ The beneficial uses do not apply west of
IIollistler Street. The beneficial uses
for the remainder of the hydrographic
subunit are as shown.
"
..
..
1-2-5 I
~-
.
I. a .. .a
-\ .
TABLE 4G" 4-5
&*~ATER OUALITY OE!JECTiVES FOR INLAND SUSFACE VIATEiS
*. a
" "___~-~___ """". - __ "_" ". ,. -_ """_" __"_ . Co?ccolrrrion, Xnt ia 3- Cx:e.Jcd :.!orrc Til7 IC', of 3. Ttmc D-acln~ .\Y, 0:- YCI: Prnod fmrll 0.- a% .-~td;-==f ..
I.
e,em:.,,!:,< 5 .>.,air.
and Sub..->. 705 CI 3.r so, > L F~ r.h a!zrs s Odur "1 P I I -~~~ ~ ~ ~ ~ ~ ~~~ ~ - "~_~ ~~- ~.
1.dO S.nJuanL'n~i
I. to t.tO. 1.10. 1.40. 1.50
1000 a00 60 wa 0.3 0.0; O.J 0.5 .\'"X 20 20 1.0
530 251 60 LjO 0.3 0.05 0.5 0.S ha. 20 20 I,O
z.co SA,,IS h(arerrt:r Unit
.. -
P.10.2.~3.2.:0.2.~0.2.90 . . 20 L.0 . .; 503 250 60 250 a 0.) 0.C; 0.5 0.5 Eon. 20 z3 1.0 2.t~. L.W. 2.50. 2.6~
1SO 300 SO lo\) a 0.1 t.Oi 0.1 0.: t:on* 20
1-00 Sul Lcir R-y Unit
..
1.10. J.20. I.)* 530 250 60 ' 250 I 0.1 0.0; 0.5 0.5 Sa". 25 20 1.0
\ LC9 clr1.b.l cni:
1 1.10, 1.19
4.20. 1. IC. .a. SO. 1.60 5W 250 60 23 I 0. J 0.05 0.5 0.5
Ron.. 20 LO 1.0 xon. 20 20 1.0
9.83 Sm i)i.*"itO cnir
f 5.10~5.20.5.30.5.~0.5.~0
500 250 60 250 L 0.5 0.05 0.5 0.5 ..ion. 23 ZJ 1.0
6.c~ P.~XW,.&IO. Unit
6-10. 6.20. 6.40 8. )O. 6.50
500 250 60 250 I 0.3 0.05 0.1 0.5 won. 20 20 a.0
1 wozc 20 20
7.M Sari Die'* Cnit
..
1 ' 7.11
1500 100 69 St0 0.3 0.05 0.5 1.0
7.12. 2.13. 1.14. 7.1s LO03 400 60 SO0 a 0.1 0.05 0.5 1.0
7.20. 7.)0. 7.40 300 50 63
Ken* 23 . 20
Konc 20 20
6; a 0.3 0.05 0.5 1.0 Eo*. 20 2J 110
3.03 coronado Unit
s. IO. 8.20. 8.30 Non. 20 20
9.CO S~ceivltrr Ustt
9.10
9.20. 9. $0
1509 5PO 60 SO0 a 0.1 . 0.05 0.5 0.5 . wo>r 20 20 1.0
x,"= LO
500 250 69 250 1 0.5 0.0; 0.5 0.5
20
1o.co 01.1 Unit
IO.ZO
IO. 50
tt.09 ria JY-~ Omir
lC00 100 60 500 0. > 0.05 0.5 0.5 KO*- za
500 Zjl) 60 LSO L 0.3 0.05 0.5 0.5
20 1.0
LDcr LO 20 1.0
, Il.11 zioo I xoor 20 20 ,
11.20. 11.10. 11.40. 11.50. L 11.60. 11.70. 11.60 SO0 250 60 250 0.1 0.05 0.5 1.0 : . Xona 20 I- ta 1.0 *
Conc.CtraliOn* Of n1:rop-n and phospborttr. by th.rnr-lrc, or ix corc5~~~50m uih Q:\== nutricntr. shall 5r rnrTz'rined rt ltvrls be!** t\o*- which
wtirnu'kt. alza. and ..x.rp.nt p1a-l gro*ch. Tkr.rho1.f rdal PtDo.jho.vr (PI canceatrr:iont .brit no? .xcrrd 0,Cj n~I1 in '"7 .:ream IL :hr p"ut
W3.r. I? .nir:* Zny r-ser-;r or Is:+. cor 0.0:; mgll LT a>y rc*er>~ir or l~ke. CI dssirtd por: i* order IO pcz.<m* plmt ~.II,.LICO~ in S:TCJ.T.~I 2-d ,
8th.t novia* 111.:. I?,prrS to 5e 0. I nzli brzl P. Thr.. valz=. &I" net io bz (ccrdrd T?Q<C tian 10'. of ~\r tic:. u:,>r at&tc~ a[ tSr *)rc;C;c
-xt*r bJY in FY.*'bT CI.IcIJ *!k-. thrt v~?cr y.4~L.y u>~r<.tir~ zhrn:-. xr. p-rng,>;bte a.,d chrng-s arc rpprord by :>e Rc~ion~I SoArd. h.-.rlolu.l,
*r*-hold *rlu-* ha"* not br-m srt lor nitros-n <on,p~~&: ho-.vrr. _ta?~r11 rat;o. Or nitrosen to p\o.+m, a:, to 5c drtrr-ince bl surr.i!lm~s and mnimrinz and u>hcld. C c'rti ace Iachlnp. 2 rr:io el S:P 2 10:l rhxll br u,&. - ..
..
!.
..
..
C.
1-4-15
. . . . I - " __
.A 0 ,' 1 , )I- ~ a.
OTES FOR'TABLES 4-6
CONCEM7RATlONS GIVEN IN MC/L OR AS NOTED-
DETAILED SALT BALANCE STUDIES ARE RECOMNENDEO F.OR TH1 S AREA TO DETERMINE
L1HlTlt4G PI1 NERAL CONCENTRATION LEVELS FOR DISCHARGES. ON THE eASl S OF
EXISTING DATA, THE TAOLULATED OOJECTI VES WOULD PROBABLY BE HA1 NTAINED IN
MOST AWEAS. UPON CONPLETION OF THE SALT BALANCE STUD1 ES, SIGN1 FI CANT WATER
QUALITY OBJECTIVE REV! S1 ONS HAY 8E NECESSARY. IN THE INTERIM PERIOD OF TINE,
PROJECTS OF GROUNDWATER RECPARGE Wl YH WArER QUAL1 TY 1 NFERlOR TO THE TABULATED
HUMERI CAL VALUES HAY BE PERMITTED FOLLOWING I NDIVI DUAL REV} EW 'AND APPROVAL BY
THE REG60NhL &ARD If SUCH PROJECTS DO HOT DEGRADE EX8 ST1 NG GROUNDWATER
QUALITY TO THE AQUl FERS AFFECTED BY THE RECHARGE-
THE RECOMMENDED PLAN WOULD ALLOW FOR WS+W+~BFbihr MEASU9?,RLE DEGRAOATION OF
GROUNDWATER IN XHI S BASi N TO PERNl T CONYINUED AGRl CULTURAL LAND USE.
POINT SOURCES, HOWEVER, WOULD BE CONTROLLED TO ACHl EVE EFFLUCNT QUALITY
CORRESPOND1 NC TO THE YABULATED NUMERI ChL VALUES. IN FUTURE YEARS DEMl NERALI-
ZATION MAY BE USED TO TREAT GROUMDWATER TO THE DESIRE0 QUAL! TY PRIOR YO USE.
A PORTION OF YHE UPPER MISSION BASIN IS BEING CONSIOERED AS AM UNDERGROUNO
POTABLE WATER STORAGE RESERVOIR FOR TREATED IMPORTEO WATER- THE AREA IS
LOCATED WORTH OF tilcwwnv 76 ON THE BOUNDARY OF HYCROGRAQHIC SUBAREAS 3.11
WND 3.12, t F TU! S PROGRAM ! S ADOPTED, LOCAL OBJECTIVES APPROACHING THE
QUALfYY OF THE lMPCRTED WATER WOULD BE SET AND RIGOROUSLY PURSUED,
NO SIGN\ FS CANT AwOUNT OF GROUNDWATER 1E.i TKI S UMI Te
I
THE WATER QUALITY OBJECTIVES DO NOT APPLY TO HYDROCRAPHtC SUBAREA 1.73 ON THE
COASTAL SI OE, OF INTERSTATE HIGHWAY 5- THE OBJECTIVES FOR THE REMATHDER OF
MYDROCRAPGI c SUBAREA ?,I3 ARE AS SHOWN.
". . .. . ~~~~~-.L'L"O"--~-~~~~~:.-~.~~",~:~.?~~;:I ,~~y~~~*~..~R~~~.r':.:..~,.~~~,~,, ~~?:..~~-.~-~~...:ri -:;; .,,.n;,*..~~-'u.-~..~.~~.-~-~ .:
THE MATER QUAL# TY OBJECT8 VES DO NOT APPLY TO HYDRoCRAPHI C SUnAREAS 4-51 AND
\<
? 4-52 BETWEEN M~GH~AY 78 AND EL CnHiuo REAL AND To ALL LANDS WHICH DRAIN TO \
MOOMLiGHT CREEK. THE OBJECTtVES FOR THE REMAINDER OF,THE HYDROGRAPHlC SUBUNIT
"""~,~ ARE AS SHOWN,- ,.~~~~~~-~c:rur,r~~.T,T".~r_LUU~?)-~~~.I.i.CL.~*.-.-.~~\~.J:.~~_..~.i1I~,~.~.-.~~~~f--l-~-~~-~''~-~~~~~~L-."-~~- ~ .. , ,. \.,.. 'r
...,....,-.a. . - ._ .. I
THE WATER QUALITY O€lJECT/VES DO N3T APPLY 70 ALL LANDS WHICH DRADN TO LOS
PENASQUITOS CANYON FROM 1.5 MILES WEST OF INTERSTATE HIGHWAY 15 TO INTERSTATE .
Ml.oHWAV 5. THE. OPJECTIVES FOR THE REMAI MOER OF THE HYDROGRAPHIC SUBUNt T ARE
AS SHOWN. ..
THE WATER QUAL1 TY ODJECTIVES 00 NOT APPLY WEST OF I HTERSTATE HICH'JAY 15.
THE OBJECTIVES FOR THE REMAINDER OF THE HYDROGRAPHIC SUBUNIT ARE AS SHOWN-
THE WATER QUALITY OBJECTIVES Do NOT APPLY WEST OF HOLLISTER STREET. THE
OBJECTIVES FOR THE REMAINDER OF THE HYDROGRAPH1 C SUOUNl T ARE AS SHOWN-
THE WATER QUALITY OBJECTIVES 00 NOT APPLY UESTERLY.OF THE EASTERLY BOUNDARY
OF 1NTERSTA.TE HIGHWAY 50 THE OBJECTIVES FOR THE REMAINDER OF THE 'UYQROCRAPHI C
SUBUNIT (SUBAREA) ARE AS SHOWN.
b I
k. . I. - WATER QUALITY w QEUJECTIVES FOR GRO'-lpdDWATEH 8 . i
1. c ~~~~~.~"~.~"~"""""~~~.~ - """ __ ."_
the S-bunnI.
h,...
"___I_ "."". "" _I_ ""-" __ """ I """
Co*r.nlralr.m. hot h *re Llrr-d.4 Mor- :?an 10'. ul I*. I.rnr Khrw~ Anr 0.7- Yrrr ;*-rid {,rz,l Yr ,. nu(,dr i "_I_ . 10s : c1 , FX.
""""
I 50, Nol ,F. , #.(n I ctBAs ! t3
Wor 7urba4hcy Calor F
IJTU) in;:.)
" I _" I tam Gnlt
6- -AM -Lo *aa.-J. -44c 4-4- .L-"f- "
W) 1.14 400 60 500 10 0.3 0.05 0.9 0.5 None 5 - 1000 - "_ - - I_ " __ " "- I I 1s u
1000 __ LO 0 - 60 a x 0.3 OI OS 0.5 0.5 Nons- 2- " _. . , - 15 1.0
l.4Oh.50~ . ; SOO'.. . Zi0 10 250. I"
'U.*,.,il. Unit
45L 0.1. . ' 0.05- . 500 I 150 60 150 10 0.5 0.03 0. 5 ' 0.). NO&. 0.5 0.5 5 . ' I5 .l.O
5 Keno 15 1.0 i L' 7. JO ?lob 2. IO 500 250 2.60. 2.70. 2.60, 2.90 60 500 250
' 30Ob 60 100b ,106 OJb o.Ojb 0.5 0.i~ KSnn, I 1 $0 10 0.5 0.05 13 1.0 0.5 0.5 Son. 9 0.5 0. s 5 None I5 1.0 60 2.50 10 0.5 0.05 ' I5 ' 1.0
U(s Re, Unir
5.lL 1500kc soobc 6o
1.14. 3.15. 1.16 300 3 00 5°obc 4ihc O.BlbC O.lSbc 0, ,C 0.5bc ~~"~ I
5
5 I5 1.0
tkn. ' IS 1.0 5 . I5 1.0
I 900b JOOb
LOOb
EO 400 10 0.1 .O.OE KO SOob 15b 0. IOb 0.0jb 0.5 0.5b Lon.
60 250 5 0.4
IS< 1.0C' 0.5 0.5 NO*. 15 1.0
0.3. 0.5b we*. 5 J. 11. 3. 12 )@Ob 60 400b IO' o.,b
500 0.05b 150 0.05 0.5 0.5
i:x+
%
y- . IO00 400 . 60 100 u 0.3 - 0.65 2 -0s ' -
* low' 400' ' 60 -, 500' lo* o.)* a 0.05* 0.5 0.5* a r;, nr
_750% 300% 60 300- l& -a- (105- i).s osa ??One h 15 1.0
IS 1.0 - "
'f k 1200 500' - 60 500 E 0.3 - 0.05 - - __-_ - 0.5 03 None 5 . 15 1. 0
None 5 " "
"
15 1.0 "
.I
"uof & a. ' " - * aL. ". &.+. .".b.' k " "
Kc- 5 Lj 1.0 750 300 KO 300 IO 0.1 0.05 0.5 0.5 -
Pui1o unit, I.
1500' $00. 60 500' 4s* 0.85' . 0.1.1 0.5 n 5' NW
LOO0
s
L 60 . 500. 10. . 0. 5- o.r,i- 0.5 0.5a ace. . 13 ' 1.0 5
- ,IS 1.0
Sen. t5 1.0
FOR. 5 I5 1.0
I. 30 IVd .ooa .. 400 60 500 IO 0.3 0.0% 0.5 0.5
500 ., 250 6o . 250 5 0.5 0.05 0.5 0.5
3.
luitee Uoit
b.10, 6.40- I 750 300 h 3 60 300 . IO c. 3 . 0.0) 0.5 0.5 E;*- IS 1.0
rrz.) L 1200 500 60 500 10 0.3 0.05 0.5 0.5 None 5 15 1.0
""" -" " "
'10 umu -. . .
L i 1500" 400' 500' 45. 0.3. 0.01. 0.5 0.s. son. 5 45* 0.1. 0.05. 0.) , 0.5. Kon.
45* 0.lL 0.05. 0.) 0.5. Son.
250 ' +So .?so 5 0.) 0.03 o.5 0.5 Ev- 0.0) 0.5 0.5 ! None
4:; ' 60 r. 1J 500 45 0.1 0.05 o.,~ 0.5 &on-
400" 60 6o ' 100.
IS 1.0
I5 1.0
I5 1.0.
1% 1.0 I IS . 1.0
4 IOOO' zso. 60 500' , 12004
z50a 60 1W 1.1s I 600* 5 IS, 1.0 '
5
3
I5 1.0
5. ' 0.3. , 0.03- 0.5 0.5' 8 Sons
; 600, 5
5 1.40 i 150 60 60 5. 0. I
do U"lI* '
' I000 . ..
der Unia
. .I
I 1500' 3ooa 60 500. 454 O.I*
I '0°
0.05. 0.5 0.5' Nom-
400 (0 $00 IO 0. ) , LOO0 250 60 250 !O
0.0s 0.5 0.5 Lon.
0.5 . 0.05 0.5 0.5 SOW
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RICK ENGINEERING COMPANY I !%*~!'I%%%FE
3088 PI0 PIC0 DR. SUITE 202 CARLSBAD, CA 92008
P.O. BOX 1129 PHONE AREA CODE 714 729-4987
ADDENDUM TO "SUMMARY DESCRIPTION OF S.M.C.W.D. WASTE
WATER RECLAMATION PROJECT" DATED 9-25-79
1. The balancing reservoir as discussed in the September 25, 1975 Summary Description has been deleted from this project. A hydro- pueumatic pump located near the treatment plant will be used inste
This will greatly reduce the expense to build and maintain the sys tem.
2. The dam embankment is designed for the "Probable Maximum Preci tation". This guideline is from Table 3(Hydrologic Evaluation Guic lines), page D-13, Appendix D of Volume l(Report of Chief of Enginc
on the National Program of Inspection of Dams)of the National Prog: of Inspection of Dams Report issued May, 1975 by the Department of Army, said report issued in response to Federal Public Law No.92-31 the National Dam Inspection Law.
The dam is classed "high hazard"(that is, if the dam failed, it WOI
create loss of life), and "intermediate" size class and therefore, designed for Probable Maximum Precipitation.
Construction of this reservoir is under permit and supervision of 1 State Department Division of Safety of Dams, permit Wo.854-2.
The above information was provided by Stan Gizienski, Woodward-Clyi
Consultants.
3. The followinginformationconcerning seepage control at the stor reservoir was excerpted from Woodward-Clydek "Design Memorandum, GE logic Study, Geotechnical Engineer and Design Services for Reclaim€
Water Storage Reservoir No.1, La Costa, California, San Marcos Coun
Water District Reclamation Project,'dated September, 1979, Page 40"
- Seepage Control Features
The seepage control elements of the design consist of an imperv core, an upstream blanket, a chimney drain and collector pipes, and a series of relief wells.
T.he geometries of the core and the chimney drain were discussed in the previous sections. At the bottom of the chimney drain, there is a 6-in. diameter, perforated ACP(Transite Class 200) drainage pipe that collects the seepage water(Sheet 5 of the pl
The perforated drainage pipe at the toe of the chimney drain Zischarges into two unperforated collector pipes: one with
invert at about Elevation 522.25 feet, and another with invert
, 'Page 2 of 4 0 0
at about Elevation 520.0 feet. The two collector pipes
lead into the concrete-lined sump at the downstream toe of the dam. Any water accumulated in the sump will be
pumped back into the reservoir.
Although the available geologic data indicate that the bedrock is tight, some seepage might occur in the
upper 20 to 40 feet of the weathered rock. To intercept this possible seepage, a series of 35 foot deep, 5 inch
diameter wells will be'drilled into the bedrock of the
dam at 6-foot centers. The line of wells, which will be located at the base of the chimney drain, will be filled
with free-draining filter material and will discharge into
the perforated pipe.
4. The site plan submitted with the Precise Development Plan has changed from the original application. The amended plan now avoids the archaeological site at the northeast corner of the site
and also incorporates improved circulation.
5. Reclaimed water use.
See attached "La Costa Northeast Irrigation Plan".
.. -. Page 3 of 4 . .. - a .- 0 0 p +$ kA
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RiCK ENGINEERING COMPANY I %'%?~%t(k~&?
- 3088 PI0 PIC0 DR. SUITE 202 CARLSBAD, CA 92008
P.O. BOX 1129 PHONE AREA CODE 714 729-4987
LA COSTA NORTHEAST IRRIGATION PLAN
Briefly described, the irrigation system will consist of two
major phases. The first phase will utilize so-called Type I1 (1) application, which will gradually be replaced by a Type I(2) system as development occurs.
Although Type TI application is less desirable than Type I, it
is an interim measure only and is necessary for the reclaimed water system to be viable.
Such a phasing is necessary because La Costa is required to accept
and use a far greater percentage of the water produced by the plant than will be generated by them(83% and 33% respectively, equal to
500,000 gpd and 200,000 gpd). In later development this will noth
a problem. The Rancheros Subdivision, for example, is a large lot
development(average 3.8 acre per dwelling unit)and will consume much more water than it will produce. However, these lots will most likely be developed individually, and permanent landscaping
to consume the water generated from the San Marcos area.
The interim system will be an asset to the area because the plants chosen have a wide tolerance range for water consumption(from 16
inches per year natural rainfall up to 64 inches per year). There-
fore, as Phase I1 replaces the Type I1 landscaping, the plants will survive and continue to beautify the area.
- installed at that time. Therefore, an interim system is required
The plants chosen are also very salt-tolerant and, with occasional leaching with potable water,will easily accept the salts in the reclaimed water.
We have also chosen deep-rooted species to break up the clay-like soil and so encourage percolation.
(1) Type TI: use is water used in a manner that normally would not be served by a potable water system.
(2) Type T use is water used in a manner that would normally be served by a potable water system.
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The application rate averages 2500 gallons per day per acre;
per day per acre(January and July, respectively).
La Costa's allocated storage in the reservoir is 47.5 million
gallons. In the Phase I: program, as much as -47.0 million gallons may be stored, however this will stabilize to 46.8 million gallons
in Phase II(based on an average 30 year rainfall figure with a
50% safety figure added). .
" however this application rate ranges from 980 to 6600 gallons
In summary, we believe that, although Phase I: is a necessary seg-
ment of the overall reclawation project, and will eventually be
phased out, it will leave the City of Carlsbad and La Costa an
area that is aesthetically pleasing and beneficial to them.
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BCH ENGINEERING COMPANY I !&%'I%LC%%~~!~~
*%;;h&;;+ F-/
3088 PI0 PIC0 DR. SUITE 202 . CARLSBAD, CA 92008
P.O. BOX 1129 PHONE AREA CODE 714 729-4987
ADDENDUM TO "SUMMARY DESCRIPTION OF S.M.C.W.D. WASTE
WATER RECLAMATION 'PROJECT" DATED 9-25-79
1, The balancing reservoir as discussed in the September 25, 197 Summary Description has been',,deleted from this project. A hydro-
pueumatic pump located near the treatment plant will be used inst This will greatly reduce the expense to build and maintain the system.
2. The dam embankment is designed for the "Probable Maximum Prec
tation". This guideline is from Table 3(Hydrologic Evaluation GI lines) , page D-13, Appendix D of Volume 1 (Report of Chief of Engj
on the National Program of Inspection of Dams)of the National Prc of Inspection of Dams Report issued May, 1975 by the Department t
Army, said report issued in response to Federal Public Law No.92. the National Dam Inspection Law.
The dam is classed "high hazard"(that is, if the dam failed, it 1
create loss of life), and "intermediate" size class and therefor1 designed for Probable Maximum Precipitation.
Construction of this reservoir is under permit and supervision o
State Department Division of Safety of Dams, permit No.854-2.
The above information was provided by Stan Gizienski, Woodward-C Consultants.
3. The followinginformation concerning seepage control at the E
reservoir was excerpted from Woodward-Clyde's "Design Memorandum, logic Study, Geotechnical Engineer and Design Services for Recla
Water Storage Reservcir No-1, La Costa, California, San Marcos C Water Oistrict Reclamation Project,'dated September, 1979, Page
See?zge ~ontrs:: Fs.gtures
The sezpage C~ZZTCL elements of the design consist of an im]
and a series ~2 rslief wells.
T.he ~zsxetries 1zS.f khz CG~S and the chimney drain were discu in th.: previous sections. At the bottom of the chimney dra there is a 6-iz. diametsr, perforated ACP(Transite Class 20 drainzqe pipe %%at collects the seepage water(Sheet 5 of th
The perforated drainage pipe at the toe of the chimney drai Zischarges into two unperforated collector pipes: one with
invert at about Elevation 522.25 feet, and another with inv
~-
core, zpi ---------- UP~ il=cllit blanket, a chimney drain and collector pi]
P Page 2 of 4 e a
at about Elevation 520.0 feet. The two collector pipes
lead into the concrete-li.ned sump at the downstrean! .toe of the dam. Any water accumulated in the sump will be pumped back into the reservoir.
Although the available geologic data indicate that
the bedrock is tight, some seepage might occur in the
upper 20 to 40 feet of the weathered rock. To, intercept this possible seepage, a series of 35 foot deep, 5 inch diameter wells will be'drilled into the bedrock of the
dam at 6-foot centers. The line of wells, which will be
located at the base of the chimney drain, will be filled with free-draining filter material and will discharge into the perforated pipe.
4. The site plan submitted with the Precise Development Plan has changed from the original application. The amended plan now
avoids the archaeological site at the northeast corner of the site and also incorporates improved circulation.
5. Reclaimed water use.
See attached "La Costa Northeast Irrigation Plan".
" . -...
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0
H ENGINEERING COMPANY I %%'%L'%'&YK
d 3088 PI0 PIC0 DR. SUITE 202 CARLSBAD, CA 92008
P.O. BOX 1129 PHONE AREA CODE 714 729-4987
LA COSTA NORTHEAST IRRIGATION PLAN
Briefly described, the irrigation system will consist of two major phases. The first phase will utilize so-called Type I1
application, which will gradually be replaced by a Type 1(2)
system as development occurs. <%
(1)
Although Type XI application is less desirable than Type I, it
is an interim measure only and is necessary for the reclaimed water system to be viable.
Such a phasing is necessary because La Costa is required to accept
and use a far greater percentage of the water produced by the plan: than will be generated by them(83% and 33% respectively, equal to
500,000 gpd and 200,000 gpd) . In later development this will notb
a problem. The Rancheros Subdivision, for example, is a large lo+ development(average 3.8 acre per dwelling unit)and will consume
much more water than it will produce. However, these lots will most likely be developed individually, and permanent landscaping
to consume the water generated from the San Marcos area.
The interim system will be an asset to the area because the plants chosen have a wide tolerance range for water consumption(from 16
inches per year natural rainfall up to 64 inches per year). There fore, as Phase I1 replaces the Type I1 landscaping, the plants wil survive and continue to beautify the area.
- installed at that time. Therefore, an interim system is required
The plants chosen are also very salt-tolerant and, with occasional leaching with potable water,wi13 easily accept the salts in the
reclaimed water.
We have alscl chosen 6eeg-rooted species to break up the clay-like
soil and so zncouraqs prcolation.
(1) Type -L :ASS .is xz=sr used in a manner that normally would no. "
be sez~.;eZ by 2 2jstaSle water system.
(2) Type x -?se is x,=?~r uI.+.i !:-a* ,sL ir\ a manner that would normally be
served S:r a pota5l6 xi,-ater systzm.
.,
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The application rate averages 2500 gallons per day per acre;
per day per acre(January and July, respectively).
La Costals allocated storage in the reservoir is 47.5 million
gallons. In the Phase I program, as much as .47.0 million gallons
may be stored, however this will stabilize to 46.8 million gallon in Phase II(based on an average 30 year rainfall figure with a
50% safety figure added). .
In summary, we believe that, although Phase I is a necessary seg- ment of the overall reclamation project, and will eventually be
phased out, it will leave the City of Carlsbad and La Costa an
area that is aesthetically pleasing and beneficial to them.
”. however this application rate ranges from 980 to 6600 gallons
.,.,.
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,-.\ EXBdIBXT F
. 9/25/79
.. SUMMARY DESCRIPTION
of
SAN MARCOS COUNTY WATER DISTRICT
WASTE WATER RECLAMATION'PROJECT
September 25, 1979
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PROJECT NO. 02
September 25,
The San Marcos County lrlater District waste water reclamation project
compasses four District elements, a1 1 of which are essential for a functiol
system:
(1) Rehabilitation of the existing District plant and its en-
largement to a capacity of 0.6 mil 1 ion gallons per day;
(2) installation of a reclaimed water distribution system;
(3) construction of a seasonal storage reservoir to hold the
total output of the plant over a 90-day winter period; and
,-
(4) a reclaimed water use area.
The existing plant, located on San Marcos Creek just downstream from I
Santa Fe Road, is about to be repaired and improved after years of use as i
operator's training faci 1 i ty. New units wi 11 be added to structures now or
site to permit treatment of larger flows. The refurbished plant will be ci
of biological secondary treatment, using the extended aeration.version of 1
activated sludge process. Secondary effluent will be filtered and chlorini
before use. An emergency generator will supply electricity to operate the
during commerci a7 power outages.
An aerobic digester for stabilization of excess activated sludge will
provided, as we1 1 as equipment for mechanical dewatering of digested sl udgc
Dewatered digested sludge will be available for soil conditioner, with sur1
hauled to a sanitary fill approved by the Regional Water Quality Control Bc
*.'S I ', . e.
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The enti re waste water reclamation operation is u'nder the control of
Regional Water Quality Control Board, which has issued Order NO. 79-23, cover-
ing reclaimed water quality, along with permissible and prohibited practices '
in the reclaimed water use area. In compliance with Order No. 79.-30, all
reclaimed water will be used for irr'gation and there will be no discharge of
effluent to streams or other bodies of water. ..
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The Water Quality Control Board has issued "waste discharge requirements"
. mitting the reclamation program to take place.
Because of its total ly aerobic design 2 the enlarged PI ant wi 11 be' odo
free. The existing units operated for many years without odor problems wh
serving as the Community sewage treatment plant.
The reclaimed water distribution system will consist of a 12-inch pip
line extending both west and south from the District plant. The westerly
will lead to a 4.5 million gallon balancing reservoir in the Rancheros De
I Costa. subdivision, about 3000 feet from the plant 'site. From this point, 1
will be pumped throughout Rancheros De La C0sta.an.d other proposed subdivi
to designated areas of agricultural use and 1 andscape irrigation. A total
zoo =@!
3$@ acres will be irrigated, resulting in a water demand averaging 500,000
. . lons per day. San Marcos County Water District is presently,seeking a mar
for the remaining 100,000 gallons per day.
The southerly branch of the distribution system connects the plant to
seasonal storage reservoir, located east of Rancho Santa Fe Road, some 350
south of the plant. Capacity of this earthfill reservoir will .be 57 mill i
gallons, somewhat greater than needed to retain the full plant output of 0
1 ion gallons per day for 90 days. The seasonal storage reservoir will a1 s
"float" on the distribution system, automatically feeding stored water bac
the irrigated area as demands increase. Construction of this reservoir is
permit and supervision of the State Department of \dater Resources' Divisio
. Safety of Dams.
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STAFF REPORT
nAm :
TO :
.t;euc.mber 12, 1979
;rlannil.? Zommission
e
,FROM : Planning Dei'artment
CASE NO. : ZC 207, SUP-4, AZ"3
APPLICANT: La Costa Land Co And San Marcos County
Water District
REQUEST,: (11, CHANGE OF ZONE FROM L-C (i,?~!.ted Control): TO
P-U(Pub1ic Utility) AND F-P (E'Ic9.d Plain
0verla.y) FOR A FJVE ACRE SITE LOCATED
'' WEST OF RANCHO SANTA FE AT THE ENTRANCE ,
TO SAN MARCOS CANYON.
,.
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(2) SPECIAL USE PERMIT TO PERMIT DEVELOPMENT
OF A FLOOD PROTECTION WALL AND ACCESS
' ROADWAY RAMP WITHIN THE F-P OVERLAY ZONE.
(3) PRECISE DEVELOPMENT PLAN FOR: A) RE. .. HABILITATION OF THE EXIETTNG TREATMENT
PLANT AND ITS ENLARGEMENT TO A CAPACITY
OF 0.6 MGD, B) INSTALLATION OF A RECLAIMED
WATER DISTRIBUTION SYSTEM; c) CONSTRUCTION
OF A SEASONAL STORAGE RESERVOIR.TO HOLD THE
TOTAL OUTPUT OF THE.PLANT OVER A 90 DAY
WINTER PERIOD, AND D) A RECLAIMED WATER USE'
SYSTEM.
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BACKGROUND
Location and Description of P'zoperty
The site of the wastewater treatment facility is approximately
800 feet west of Rancho Santa Fe Road,'north'of the intersection
of Questhaven Road and Rancho Santa Fe-Road in the north east
La Costa area. The two reserv0ir.site.s are on property owned
by the La Costa Land Company. One is approximately 3000
feet to the southwest of the treatment plant, and the other
i.s approximately 4000 feet to the south.
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a * The wastewater treatment facility is at the entrance of the
San Marcos Canyon in a realtively flat, narrow valley. The
two reservoir sites will be placed in shallow valley's.
Existing Land Use
subject property: All' the property in question is vacant
except for the sewer treatment plant
as explained above.
approxinlately one mile.
approximatel'y one mile.
,.
North: The nearest residence t.0 the north is
South: Mostly vacant, with some residential
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East: Mostly' vacant, with some industrial
buildings approximately one-half
mile, to the east.
development approximately one mile to
the west.
West: Mostly vacant with some residential
'History and Related Cases
PDP-2, City Council Resolution No. 5871, approved 8/7/79,
Satellite Sewer Treatment Plant,.Lake Calavera Hills.
'PDP-2 is similar to the subject application .in that it is a
small satellite type plant with wastewater storage facilities.
The approved City Council Resolution for PDP-2 is attached.
City Council Policy on satelite treatment facilities:
. At.the time of considering PDP-2, the City Council adopted
.. par.ts: one being city wide policies - of these one policy
satelite sewer treatment policies. The policies are in two
requires that satelite.treatment facilities be also designed
for water reclamation. ":
PDP-1, City Council Resolution No. 5812, approved 6/19/79,
Expansion of the Encina Joint Agency Wastewater Treatment-
Facility.
This application differs from the subject applicaton in that
PDP-1 is a large treatment facility without water reclamation.
ZC-206/ME-l49(D), Request for rezoning and Master ,Plan
Amendment to delete a portion of northeast La Costa from the
La Costa'Master Plan. This area will be. served by the
subject treatment.plant. There actions'are presently being
processed and are scheduled for the January 2, 1980 City Council
meeting.
EkVIRONMENTAL IMPACT INFORMATION
An Environmental Impact Report as been certified by the
* * San Marcos Courisy Water District for the reactivation wastewater
project. Since the project is withi11 the incorporated
boundaries of the City of Carlshad, the City as a responsible
agency did review and cdmment on this Environmental Impact
Report. In addition, it is our responsibility to determine
that the mitigating measures as'indicated in the Environmental
Impact Report. will be met or there are overriding consideratiol1s in
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. approving the project. A copy of this E.IR has been distribute
for your information.
GENERAL PLAN INFORMATION
' Land Use: The Land Use Element of the General Plan indicates
a public utility site for the wastewater reclamation project,
therefore the project is consistent with the General Plan.
The reservoirs are in areas indicated as.low-medium residentia
A storage reservoir is considered compatible with residential
development. Therefore the project is consistent with the
Land Use Element of the General Plan. '
Public Facilities: The.goa1 of the public facilities element
is to provide a comprehensive pcblic services and facilities
for the citizens of the City of Carlsbad to insure that all
necessary public facilities will be available concurrent
with need in connection with the development of the City
pursuant to the balance of the General Plan. The reactivation
of this wastewater treatment facility meets this goal of the
public facilities element.
Other' E'l'ements: These applications are consistent with all ot
elements of the Genera3 Plan.
..
Ma j.0.r. Pla'nnhg Considerations
1. What impacts will the reactivation and operation of I:
this plant and reservoirs have on the area and havebthey
been sufficiently mitigated?
2. What are the potential growth inducing impacts caused
by the project and will the projects have precedence for
s-imilar proposals? What will these precedences mean to
the planning process of the public facklities management
program?
3. What guarantees have been established to ensure that
the treated water will he properly used for irrigation
as a substitute fox new potable water.?
4. 1s the proposed expansion desirable in terms of city
policy?
5. What significant environmental impacts, i-e., noise,
visual aesthetics,.odors, will result from the proposed
projects, can these impacts be sufficiently m.itigated?
Di'scu's's'i'on
ZC-2'07: The property was zoned L-C when it was annexed to the
.City last year. The L-C zone is a holding zone; theregore,
the proposed zone change is necessary to bring the property
into consistency with the General Plan category of public
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utility. The .flood plain is necessary since the Corps of . Engineers has indicated a portion of the. property to be in a
designated flood plain area.
S.UP-4: A Special Use. Permit is required for all development
in a flood plain as per the Flood Plain Overlay Zone. A
Special Use Permit is basically a report from the City
Engineer on the impacts of such development. The City
Engineer has +determined that the proposed construction in
the flood plain will not have. an adverse effect on surrounding
or downstream properties .(see attached report from the City
Engineer). ..
PDP-3: The applicant submitted a summary description of the
project, dated September 25,. 1979, which is attached. Also
the EIR has a project description which explains the proposal.
The project has been approved by the California Regional Water
Quality Control Board on March 26, 1979. See attached Letter
dated March 26, 1979, and Order No. 79-23. The reservoir and
dam must be approved by the State Division of Dam Safety. .
The applicant believ'es approval will be forthcoming about
December 20, 1979. Per City zone requirements the. project also
. ' requires City approval. The.City's authority is land use.
As per'section 21.36.050 of the Carlsbad Municipal Code, the
City is to determi.ne if the project $s consiste'nt with the
P-U zone... The intent of the P-U zone is to provide compatibilit
of the devel.opment with the general plan and surrounding .:,
development; ensure that due regard is given to environmental
factors; provide for public improvements and other condit!ions
of approval necessitated by the development.
This narrowing of the City's responsibilities may not appear ,
consistent with the City's involvement in the Lake Calavera
Hills satelite treatment plant. The two projects differ in
that the Lake Calavera Hil'ls plant is to be City owned and
operated, and the water is generated and reclaimed totally
within the City; wh.ereas the proposed-S.an Marcos County Water
District plant is to be owned and operated by a special
district and some of the water is to be generated. and reclaimed
. outside of the City. San Marcos County Water District is
however, a special district with authority in both waste
water treatment and water distribution'.. Questions have been
raised on the jurisdictional responsibilities and the
distribution of reclaimed water, The question has been referre
to the City Attorney's Office.
The present inactive plant has the capacity for 200,000
gallons per day, As requested the plant will he enlarged in
two phases. The first phase is for 270,000 gallons per day,
the final will be for 600,000 gallons per day. It wj.11 be
many years before the actual maximum capacity will.bc met.
The process is to be aerobic, which minimizes odor probLems.
The project includes water reclaimation, by using the water
for irrigation. A balancing reservoir is proposed for the
irrigation water to the southwest, (Rancheros). It
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is possible that this 4.5 million gallon reservoir will not
water during low water demand periods. This is a reservoir
to the south with a capacity of 57 million gallons,.
g.iving a 90 day reserve. The water reclamation will be
irrigation (land treatment) in .specifically designed land-
scaped areas to be approved with later land developments.
Initially reclaimed use will be Type 11. Eowever,
as development occurs reclaimed water will be used by these
developments as Type I. (Type I use is water used in a manner
that would normally be served by the potable water system.
Type I1 use is water used in a manner that normally would not
be served by the potable water system).
During low or no reclaimed water demanh times the effluent
from the plant will be pumped to the reserve reservoir. -During
irrigation the effluent will; come directly from the plant and
the reservoir if needed. Therefore the reservoir will have a ..-
constantly fluctuating level. It is possible that during heavy
periods the reserve reservoir will overflow. .There is a spill
way planned t-hat will deliver the water to the San Marcos .
Creek drainage basin. The Reqional Water Quality Control
. Board has indicated that the chemical content of this dilluted
. be needed. A reserve system is also proposed that will hold
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. ' overflow will meet their specification. However, they have
requested monitoring. ..
The water will be given secondary treatment and will be safe
for irrigating near residences. The EIR indicates that the
sprinklers will have low trajectories to reduce water drift.
The irrigation rates will be low to stop runoff, and collector
ditches will be constructed at the toes of slopes to 'return
runoff to plant, Also there will be collector ditches at the
reservoirs to return seepage to the plant.
.I
This application is similar. to the Lake Calavera kills in
that it is a satellite treatment plan't. Howevcr, it differs
somewhat in -the process in that airation process will be in
open tanks instead of the "race track" cannals of Lake
Calavera Hills. Although the "race track" is superior as
a method and saves energy, the equipment for the tanks are
. there and there isn't sufficient space for the "race tracks",
Staff does not believe that the treatment plant and reservoir
will have an adverse impact on surrounding areas as proposed
and conditioned. The plant is relatively small and the
process minimizes obnoxious elements. Reservoirs will appear
as lakes in low density.residcntia1 areas, be fenccd and the
water use should not stagnate because of fluctuating levels.
The plant will not be growth inducing by itself, it will,
however, speed up development in the area. If the City wishes
control of growth in the area, a more effective.mcthod would
.be a growth management program.
City policy on wastewater treatment plants require Type I
use of the reclaimed water (use of 'the water in areas that
would nornal1.y be served by potable water).
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La Costa Land Company, however, will attempt to reduce the
Type 11 use as development occurs. They believe that in time
'ali. of the reclaimed water will be used in a Type X manner.
As proposed, the district would require that each user -
de.monstrate that there is sufficient land available for
the disposal of effluent generated by the development.
These developments will have to provide dual water. system for
irrigation use of reclaimed water and the-potable water supply.
San Marcos County Water District, as proposed, Will operate
the plant and reclaimed water distribution. It will contract
with the homcowners association to use' the water. A possible
problem, is -that the. San Marcos sewer and water jurisdictions
do not have consistent boundaries. .There maybe a question
if San Marcos<Count:7 Water District can distribute reclaimed
water in areas they do not serve with sewef. The project
description indicates that 400,000 gallons per day generate
outside of Carlsbad will be reclaimed in Carlsbad.
Sludge from the treatment will be pressed dried, but will not
.be placed in drying beds €or complete drying. -There is an
odor generated from bed drying and it takes space. Instead
the pressed dry sludge-will be trucked to a solid waste
disposal site. This cohld be a progiem from water leaking
from trucks at the disposal site. Although the Regional
Water QualiLy Control. Board has approved the project, staff
has recomn1cnc?ed a condition requiring the review of this -7.
di.sposa1 method by the County Health Department, County
Department of Solid Waste Management, Regional Water Quality
Control Board and Department of Fish and Game.
The EIR indicates that adequate soils for land irrigation
may be difficult to find in the area. Evidently soils . .
should be 2 to 3 feet deep for adequate drainage. Most
soil in area are less than 18" deep and are on top of bed
rock or clay deposits. Therefore, it .is important that the
applicant supply the City with an irrigation schedule that
relates soil.s, vegetation and water requirements. This
information should also include'analysis on slopes, 'leaching
needs, monitoring systems, and land properties, etc.
The "examination of criteria" appendix to the EIR indicates
that the storage of the seasonal reservoir needs to have
a 95 million gallon capacity. The proposal is for 57 million
gallons (see Exhibit "A"). It has been confirmed by the
applicant and the City's Public Works Administrator, that the
RTR is in error a.nd the 57 million, gallon reserve is
sufficient for a 90 day reserve.
There is no fail safe system designed for.plant malfunction.
This is consistent with the Regional. Water Quality Control
Board acti.ons on. these plants. Evidently the incidence of
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plant malfunction is minor and.can be quickly remedied.
As explained earlier, the Regional Water Quality Control
.Board has approved the overflow system of the reserve reservoir.
Some 'of the data or statements made in this report are not
substantiated by the information contained in the EIR or
summary description. However, representatives of the applicant
will attend the meeting to answer your questions and supply
data and. substantiation.
I_ Recommendat; on "-
" ZC-207, staff recommends that ZC-207, be APPROVED as PU with. '
. FP Overlay as per the attached legal map, for the following
reasons: ..
.1. The proposed change of zone is consistent with the
General Plan since the"P-U Zone specifically allows
public facilities as indicated on the General. Plan
Land Use Map.
2. The P-U zone requires a Precise Development Plan of.
Development. Conditions may be placed on the PDP to
meet requirements of the General P1a.n or any other
, needs.
3. The site is physically suitable for .the type of use
since the site is adequate in size and shape to accomm.odate
a sewer treatment plant.
4, The 'project is consistent with all City public ....
facility policies and ordinahces since the reactivation
of this facility will provide sewer service in the
service area. ..
5. The $reposed change of zone will not cause any substantial
environmental in;pacts, and an environmental impact
report has been certified by the San Marcos County
Water District for this project. Appropriate mitigating
measures will be taken on subsequent' actions to approve
development on the site.
6. The flood plain overlay zone will require Engineering
Report on impacts of construction on flooding.
. . SUP-4: Staff. recommends that SUP-4 be approved based on the
Eollowing findings and subject to the condition that all
development and erosion protection measures occur substantially
as shown on SUP-4, Exhibit A and B, dated November 15, 1979,
on file in the Planning Department.
"I.
Findings ""-
1. The Special Use Permit is consistent with the purposes .
of thc flood plain Overlay Zone because the proposed
engi.ncering improvements to the site adequately mitigate
the flood hazard to the site, and have been made condition:
of approval.
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, 2. The City Engineer has found-that no,increased flood danger
is likely due to the construction of the wall, Additionally
the rockwall seems sufficient to protect the treatment
plant from the 100 year flood.
3. The.Specia1 Use Permit is consistent with all applicable .
specific and general plans because:
A. Thc' use of tile site for a wastewater treatment
facility is in conformance with General Plan Land
Use Element des'ignation of public utilities. ._
R. The proposed engineering improvements to the site
impelemnt the 'Public Safety Element's goal of
minirnizing injury, loss of life and damage to .
property resulting from flood disaster.
4. The issuance of the Special Use Permit will not adversely
affect cr unduly hinder, restrict or alter the water
carrying.function of the floodplain because the proposed
engineering improvements specifically provide €or th.e
sife, efficient disposal of storm water.
5. The project is consistent with all public facility
policies sinc.e the site will be .used for a wastewater
treatment plant I
6. The subject application has complied with the require:ments
of the City of Carlsbad Environmental Protection Ordinance
because an Environmental Impact Report has been certified
by. the applicant, and San Plarcos County Water District.
"_" PDP-3:' Staff recommends that PDP-3 be approved based on
the following findings and subject to the fo.llowing conditions:
1. The proposed Precise Development Plan ensures compatibilit!
of the development with the General Plan because:
A. The General Plan Land Use Element designates a
public utility in this area.
R. Subsequent development in the- area served by the
treatment plant wil1,he consistent with the General
Plan because all zoning in the service area is
consistent with the General Plan.
2. The proposed Precise Development Plan ensures cornpatihilit
of the project with surrounding development because:
A. Adequate mcasures are required as part of the
approval. to mitigate any adverse impact's the
property may have.
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B. The location of the project in a valley will
reduce adverse impacts to surrounding property.
3. It has been determinkd that the proposed Precise Development
Plan will not result in any siginficant adverse impacts
to the environment'due to the following reasons: .
A. The conditions of approval include mitigation
measures outlined in the EIR certified by the San
, Marcos County Water District and mitigate potential
adverse environmental impacts. .
B. The project will be subject to further. review and
approval by effected State and Federal agencies.
Said review constitutes additional environmental
impact assessmentz- and insures the project's
compatibility with the natural manmade environment.
4. The proposed Precise Development Plan provides for
public facilities as necessitated by development and/or
approvals in the area:
A. The proposed wastewater treatment facility will
serve as a complimentary use to the existing
Encina sewer.treatment plant by providing the area
with addition.al sewer capacity.
. ..
B, The proposed reclamation faci.lity will reduce the
amount of potable water necessary to serve this.,
area in the future.
C. Said reclamation system 'could allow for the pre-
servation and continuation of agricultural production.
D. All other public facilities will be available.at
time of development.
E. The project is specifically exempted from the
' Ciiy's Public Facility Fee Policy (City Council
Policy No. 17) s
Conditions
1. Development of the site shall occur substantially as
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indicated in the project description of the certified
EIR, Exhibit F, dated 9/25/79, and as shown on Exhibit
A, H, C, D, and E dated 11/15/79, except €or modifications
that nay be contained herein and minor modificatians not
affected plant operational efficiency that are approved
by the Public Works Administrator. -
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2.
3.
4.
5 I.
6.
7.
8.
e *
In addition to the approval of the development indicated
in the cxhibits noted above, all other requirements and
appurtcnances as listed in this approval shall be indicated
on the final Precise Development Plan.
Eventually all water treated by this tre'atment plant shall
be reclaimed and.used in-a Type I method. To ensure Type
I use, the applicant shall prepare to the satisfaction of
the Director of Parks and Recreation, and the Public Works
Administrator, or his designee, a document outlining the
methods for Type I use. It shall contain a plant list
o'f drought tolerant vegetation, water absorption rates
per plant and soils, and the gallons of water per acre
needed to accommodate the proposal. The document s.hall
also inclEde criteria for operating, maint.aining and
monitoring the irrigation area and system. This shall he
done prior to certification of the treatment plant,
Prior to certification of the treatment plant, the applican
shall submit written approval from the San Diego Regional
Water Quality Control Board that the following matters
have been met or are to their satisfaction:
A. Adequate monitoring programs have been established
to determine.salt build-up in soil irrigation by the
reclaimed water. ..
B. Adequate monitoring programs of algae growth in
I Batiquitos Lagoon to determine of such build-up :is
caused by the proposed irrigation program, or
seepage from the reservoirs.
C. Is the overflow system from the reserve reservoir .
.to the San Marcos Creek drainage basin acceptable.
..
The Water Plaster shall monitor the construckion of the
was'tewater reclamation and distribution system in order
to avoid cross-connections with potable water lines.
The irrigation system shall be maintained and operated
by the San Marcos County Water District under a con-
tractural agreement that is to give them total assurance
that .they would always have the ability to discharge the
effluent -
The final design for the treatment plant is to include
an embankment along San Marcos Creek at the plant to
guard against flooding. I4 1601 permit from California
Department of Fish and Game is to be obtained for the
alterat.ion of the streambed. .
Seepage from the floor of the reservoir is to be collected
and returned to the reservoir.
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. 9.
10.
11.
12.
13.
14.
15 D
16.
1 7.
18.
0 '0 Prior t.o certification of the treatme.nt plant, the
applicant shall submit, to the satisfaction.of the
Director of Planning, an archaeolo.gica1 report indicating
the impacts and mitigating measures with the construction
of the plant site, reservoirs and any lines, spillways,
seepage collectors, or any other appurtenances which .
impact archaeologically important sites.
Prior to certification of the treatment plant, the
applicant shall secure easement rights €or the City
prohibiting the location of any habitable buildings
within 100 yards from the southern edge of the wastewater
treatment site and the outside edge of the access road
as indicated on Exhibit A, dated .ll/l5/79.
Grading plans for all facilities shall be. approved by .
the City Engineer. Such plan shall include provisions .
to limik grading, cut and fill and excavation to the .
minimum areas necessary to prepare construction sites to
reservoirs.
Drainage facilities adjacent. to the treatment piant shall
be designed to accommodate a 100-year flood and protect
the treatment plant and reservoirs. These facilities
shall be constructed concurrently with grading activity.
"
Surfaces shall be graded to direct, runoff toward designed
drainage facilities and away from any cut and fill -
slopes.
Land shall not be cleared of vegetation except immediately
before grading, and grading s.hould take place only
during the dry season (April 16 to October 311, unless
otherwise approved by the City Engineer, ..
All graded slopes'shall be stabilised for erosion
control immediately following grading by the developer.
Landscape and irrigation plans for graded areas shall
be submitted for the approval of the Planning Director.
The landscaping shall be designed to screen the treatment
facilities and reservoir from surrounding properties.
Plans shall include fast growing, tall trees as well as .
a combination of shrubs and ground cover. Plants shall
be drought tolerant fire retardent. where necessary and
easily maintained. The approved landscaping and irrigatic
shall be fully installed prior to the City final approval
for the facilities.
Natural vegetation shall be retained wherever possible..
All pumps, generators and other noise prodicing mechanism
shall be placed underground and/or shielded in such a
manner to reduce noise to a maximum of 55 dba at property
line of all facilities.
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19. Final plans for treatment facilities shall indicate
lighting to provide adequate night Lime operations.
Such lighting shall be designed in a manner SO that
nearby residences OK public streets are not. adversely
affected. The lighting plan shall be subject t:o the
approval of the Planning Director.
20. The treatment facility, reservoirs and mech;inical
appurtenances shall be totally enclosed b'y a fence a'
minimum of 6' in height and designed for security
purposes,' subject to the requirements of t.he State
Water Quality Control Board.
21. The applicant shall. provide evidence to the City Engineer
fhat the method for the disposal of sludge. crcated'by
the treatment plant has been approvcd by the appropriate
agency. ..
. 22. All equipment proposed to be placed on any roof shall
be'screened from public view and subject to the approval
of the Planning Director. ~.
23, After approval, the applicant shall.suhmit a reproducible
. copy of the Precise Development Plan which incorporates
all requirements of the approval to the Cit.y Manaqer
for signature. Prior to signing of.the final Precise
Development Plan, the City Manager shsll deterxine that
all applicable requiremetns have been incorporated into
the plan and that all conditions of approval have,been
satisfactorily met or otherwise guayanteed. ~11e final
signed.Precise Development Plan shall be the official
site layout plan for the property and shall be attached
to any application for a building p6:rmit for the
enlargement of the treatment plant: on the subject
property.
Attachments
Summary Description, September 25, 1979
City Council Resolution No. 5871, LCH Treatment Plant '
,City Council Policy on Satellite Treatmcnt Plant, revised
. ' Report from City Engineer re: floodplai:n, dated November 28,
June 1, 1979
1979.
3/29/79, with attached Order No. 79-23.
Letter from the Reqional Water Quality Control I3oard dated,
Legal Map for ZC-207
BP: ar
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